The MVME162, a single-board (SBC), implements a Motorola 68040 or MC68LC040 CPU with memory management and floating point units embedded(only in 68040 models). The MVME162 itself is a single-height 6U VME board. This board was equipped with most of the I/O needed for full computer functionality, including RS232, Ethernet and SCSI(not all models has SCSI or/and Ethernet built in). The external I/O was implemented via the P2-VME connector at the back of the board which became standard in the following MVME1x7 CPU boards. Several breakouts were available, Motorola's 712 boards were the most widely used ones. The MVME162 boards became very popular in industrial computer environments. The board configuration and component will vary depending on the generation.        CPU       25MHz 32-bit Microprocessor: either an MC68LC040 Enhanced 32-bit Microprocessor or an optional 25MHz MC68040 32-bit Microprocessor         Chipset Optional Intel 82596CA Ethernet Controller Optional NCR53C710 narrow SE SCSI bus controller 8-bit bidirectional parallel interface provided by Programmable Channel Controller (PCC2, an ASIC implementation) VMEChip2 VME Bus controller - non-VMEbus version optional MK48T08 8kB Non-Volatile RAM and clock chip 512KB of SRAM PCC2 chip ASIC Programmable Channel Controller (provides interface to I/O-chips) One 1Mbit 32-pin PLCC EPROM Four MVIP IndustryPack interfaces        With an abundant supply of goods that are designed to transform industries, Rockss Automation invites you to embark on a journey of unrivaled progress. Rockss Automation has a large supply of goods, welcome to order!         

There are various types of Siemens PLCs, such as Siemens PLC S7-200 series and Siemens PLC S7-300 series, which are widely used in various industrial automation fields. During use, users need to process analog signals to implement various logic. The following article introduces the Siemens PLC analog processing method, in order to better use Siemens PLC for users.   Siemens PLC Analog Processing Method     1. Standard signal In the era of electric sensors, central control becomes possible, which requires long-distance transmission of detection signals. However, the direct transmission of complex physical signals will greatly reduce the applicability of the instrument. Moreover, most sensors belong to the weak signal type, and long-distance transmission is prone to attenuation and interference issues. Therefore, secondary transmitters and standard electrical transmission signals emerged. The function of a secondary transmitter is to amplify the sensor signal into an electrical signal that meets industrial transmission standards, such as 0-5V, 0-10V, or 4-20mA (among which 4-20mA is more commonly used). By shifting the zero point and adjusting the gain of the amplifier circuit, the transmitter can accurately correspond the standard signal to the detected range of physical quantities, such as 0-100 ℃ or -10-100 ℃. This is a mathematical transformation of physical quantities using hardware circuits. The instruments in the central control room drive these electrical signals to mechanical voltmeter and ammeter to display the measured physical quantities. For different range ranges, simply replace the dial behind the pointer. Replacing the dial will not affect the fundamental nature of the instrument, which brings unlimited benefits to the standardization, universality, and large-scale production of the instrument. If you are looking for a reliable and efficient variable PLC, come to Rockss Automation to take a look and perhaps find a satisfactory product. We have different brands of PLC,such as Siemens PLC, Allen-Bradly PLC, Schneider PLC,etc.         2. Digital instrument  In the digital era, pointer display meters have become more intuitive and accurate digital display methods. In digital instruments, this display method actually uses a purely mathematical method to invert the standard signal, becoming a common way of expressing physical quantities. This transformation relies on software for mathematical operations. These operations may be linear or nonlinear equations, and today's computers are easy to handle these operations.     3. Mathematical problems in signal transformation The transformation of signals requires the following process: physical quantity - sensor signal - standard electrical signal - A/D conversion - numerical display. For simplicity, we are discussing linear signal transformations here. Simultaneously skip the signal transformation process of the sensor. Assuming the physical quantity is A, the range is A0-Am, and the real-time physical quantity is X; The standard electrical signal is B0-Bm, and the real-time electrical signal is Y; The A/D conversion value is C0-Cm, and the real-time value is Z. Thus, B0 corresponds to A0, Bm corresponds to Am, Y corresponds to X, and Y=f (X). Due to its linear relationship, the equation is obtained as Y=(Bm B0) * (X - A0)/(Am A0)+B0. Due to its linear relationship, the mathematical equation Z=f (X) after A/D conversion can be expressed as Z=(Cm C0) * (X-A0)/(Am A0)+C0. So it is easy to conclude that the mathematical equation for inverse transformation is X=(Am A0) * (Z-C0)/(Cm C0)+A0. The X calculated in the equation can be directly expressed as the detected physical quantity on the display.     4. Calculation method of inverse transformation in PLC Taking Siemens PLC S7-200 and 4-20mA as examples, after A/D conversion, we obtained values of 6400-32000, C0=6400, and Cm=32000. So, X=(Am A0) * (Z-6400)/(32000-6400)+A0. For example, a certain temperature sensor and transmitter detect -10-60 ℃, expressed as X=70 * (Z-6400)/25600-10 using the above equation. After calculating the mathematical operation instructions of the PLC, the Siemens HMI can read from the result register and directly display it as engineering quantity. Using the same principle, we can input engineering quantities on the HMI and then convert them into standardized values used by the control system through software. In Siemens PLC S7-200, the calculation results of (Z-6400)/25600 are very important values. This is a real number from 0 to 1.0 (100%) that can be directly sent to the detection value input of the PID instruction (not the instruction wizard). The PID instruction outputs real numbers from 0 to 1.0, which can be converted into 6400 to 32000 through the inverse calculation of the previous formula, and sent to the D/A port for 4-20mA output.      Our team of experienced professionals is dedicated to delivering personalized services that exceed our customers' expectations. We offer a diverse range of services,including after-sales and maintenance, among others. Our team is composed of experienced engineers and technicians who are highly skilled in the maintenance and troubleshooting of PLCs.

There are many setting parameters of the inverters, and each parameter has a certain range of choices. During use, it is often encountered that the inverter cannot work normally due to improper setting of individual parameters. Therefore, it is necessary to set the relevant parameters correctly.   Allen-Bradley 22P-D045A103 AB400P 1. Control method: That is, speed control, torque control, PID control or other methods. After adopting the control method, it is generally necessary to carry out static or dynamic identification according to the control accuracy.   2. Minimum operating frequency: That is, the minimum speed at which the motor runs. When the motor runs at a low speed, its heat dissipation performance is very poor. If the motor runs at a low speed for a long time, it will cause the motor to burn out. And at low speed, the current in the cable will also increase, which will also cause the cable to heat up.   3. Maximum operating frequency: The maximum frequency of general inverters is 60Hz, and some even reach 400 Hz. The high frequency will make the motor run at high speed. For ordinary motors, the bearings cannot run at super-rated speed for a long time. Whether the rotor of the motor can withstand such a centrifugal force. CT Emerson SP1405 Inverter 4. Carrier frequency: The higher the carrier frequency is set, the greater the high-order harmonic component, which is closely related to the length of the cable, the heating of the motor, the heating of the cable, and the heating of the inverter.   5. Motor parameters: The inverter sets the power, current, voltage, speed, and maximum frequency of the motor in the parameters, and these parameters can be directly obtained from the motor nameplate. RELIANCE ELECTRIC UAZ3455UAZ3475 Inverter   6. Frequency hopping: At a certain frequency point, resonance may occur, especially when the whole device is relatively high; when controlling the compressor, the surge point of the compressor should be avoided.   7. Acceleration and deceleration time The acceleration time is the time required for the output frequency to rise from 0 to the maximum frequency, and the deceleration time is the time required for the output frequency to drop from the maximum frequency to 0. Usually, the acceleration and deceleration time is determined by the rise and fall of the frequency setting signal. When the motor is accelerating, the rate of increase of the frequency setting must be limited to prevent overcurrent, and when the motor is decelerating, the rate of decrease must be limited to prevent overvoltage. Acceleration time setting requirements: limit the acceleration current below the over-current capacity of the inverter, so as not to cause the inverter to trip due to overcurrent stall; the main points of deceleration time setting are: to prevent the smoothing circuit trip the inverter. The acceleration and deceleration time can be calculated according to the load, but in the debugging, it is often used to set a longer acceleration and deceleration time according to the load and experience, and observe whether there is an over-current or over-voltage alarm by starting and stopping the motor; then gradually increase the acceleration and deceleration setting time. Shorten, based on the principle that no alarm occurs during operation, repeat the operation several times to determine the best acceleration and deceleration time.   Allen-Bradley 25B-D4P0N114 Inverter   8. Torque boost Also called torque compensation, it is a method of increasing the low frequency range f/V to compensate for the torque reduction at low speed caused by the motor stator winding resistance. When it is set to auto, the voltage during acceleration can be automatically increased to compensate the starting torque, so that the motor can accelerate smoothly. If manual compensation is used, according to the load characteristics, especially the starting characteristics of the load, a better curve can be obtained through experiments. For variable torque loads, if the selection is improper, the output voltage at low speed will be too high, which will waste electric energy.   YASKAWA CIPR-GA70B4060ABBA-AAAAAA Inverter        Our team of experienced professionals is dedicated to delivering personalized services that exceed our customers' expectations. We offer a diverse range of services,including after-sales and maintenance, among others. Our team is composed of experienced engineers and technicians who are highly skilled in the maintenance and troubleshooting of Inverters.        In conclusion, Rockss Automation Technology Co. Ltd. is the perfect partner for all your automation needs. Whether you need Inverters for industrial, manufacturing, or commercial purposes, we have it all. Our commitment to providing quality products and services at competitive prices, coupled with our experienced team of professionals, is what sets us apart. Contact us today and let us help you streamline your automation needs.  

With the continuous improvement of industrial automation, Inverters  have also been widely used. Inverter  (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. Inverters  are high-tech products with high technological content, high added value, and good returns. They are industrial products that comply with national industrial development policies. Inverters have a development history of nearly 30 years in China, as a power control equipment that utilizes frequency conversion technology and microelectronics technology to control AC motors. In the past few decades, Inverters  have made certain achievements in industrial scale, application fields, and product functions. The Inverter  industry faces many challenges. Affected by national macroeconomic regulation, investment in some industries has been directly suppressed, directly affecting various automation products such as Inverter s, PLCs, and HMIs. The large PLC market in China is basically flat with almost no growth, mainly affected by the decrease in regulatory investment in the metallurgical industry. This industry regulation will mainly affect the basic industries of the country, corresponding to low-voltage Inverter s, and mainly affect the project oriented market of their applications, such as metallurgy, power, oil and gas, chemical and other industries. So what is the current development status of Inverters in China? A Inverter  is an electrical energy control device that utilizes the on-off effect of power semiconductor devices to convert a power frequency power supply to another frequency. The Inverter  we are currently using mainly adopts the AC-DC-AC mode (VVVF frequency conversion or vector control frequency conversion). Firstly, the power frequency AC power supply is converted into a DC power supply through a rectifier, and then the DC power supply is converted into an AC power supply that can be controlled by both frequency and voltage to supply the electric motor. The circuit of a Inverter  generally consists of four parts: rectification, intermediate DC link, Inverter, and control. The rectifier part is a three-phase bridge uncontrollable rectifier, while the Inverter  part is an IGBT three-phase bridge Inverter  with a PWM waveform output. The intermediate DC link is filtering, DC energy storage, and buffering of reactive power. AC motor variable Inverter speed regulation has become the trend of contemporary motor speed regulation. Its small size, light weight, large torque, high accuracy, strong functionality, high reliability, easy operation, and easy communication functions are superior to any previous speed regulation method. Therefore, in steel, non-ferrous metals, petroleum, petrochemical, chemical fiber, textile, machinery, power, electronics, building materials, coal, medicine, papermaking, injection molding, cigarette, crane, urban water supply Central air conditioning and sewage treatment industries are widely used. The article introduces the introduction of frequency conversion speed regulation technology in developed countries such as Japan, the United States, and Europe into the Chinese market and the rise of domestic enterprises, and points out that Inverters are developing towards high-performance, modular, specialized, and multifunctional technology. The continuous increase in usage, the continuous decrease in prices, and the merger of industry combinations have the potential to expand overseas.  AC motor variable frequency speed regulation has become the trend of contemporary motor speed regulation. It has advantages over any previous speed regulation method, such as small size, light weight, large torque, high accuracy, strong functionality, high reliability, easy operation, and easy communication, such as pole change speed regulation, voltage regulation speed regulation, slip speed regulation, cascade speed regulation, commutator motor speed regulation, hydraulic coupling speed regulation, and even DC speed regulation. Therefore, it is widely used in the industries of steel, non-ferrous metals, petroleum, petrochemicals, chemical fibers, textiles, machinery, power, electronics, building materials, coal, medicine, papermaking, injection molding, cigarettes, cranes, urban water supply, central air conditioning, and sewage treatment. The development of motion control systems is the power converter in motion control systems, and motion control systems are the development of electrical transmission technology as electromechanical energy converters. The current motion control system is a technical field that encompasses multiple disciplines, and the overall development trend is: AC driven, high-frequency power converters, digital, intelligent, and networked control. Therefore, as an important power conversion component of the system, frequency converters have developed rapidly by providing controllable and high-performance variable voltage variable frequency AC power sources. The Development Trend of Inverters in China The development trend of Inverter  technology has gone through about thirty years of research and application practice. With the application of new power electronic devices and high-performance microprocessors, as well as the development of control technology, the performance price ratio of frequency converters is getting higher and smaller, while manufacturers are still continuously improving reliability to achieve further miniaturization, lightweight, high-performance, multifunctional, and pollution-free Inverters. The performance of a Inverter  depends on the impact of the harmonics of its output AC voltage on the motor, the harmonic pollution to the power grid and the input power factor, and the energy loss (ie efficiency). Taking the AC-DC-AC Inverter  as an example, it will further develop in the following aspects from a technical perspective: 1. The power switch components of the main circuit are self turned off, modularized, integrated, and intelligent, with increasing switching frequency and further reducing switching losses. 2. In terms of the topology structure of the main circuit of the Inverter : The grid side converter of the Inverter  often uses a 6-pulse converter for low voltage and small capacity, while multiple Inverter s with more than 12 pulses are used for medium voltage and large capacity. The load side converter often uses two-level bridge inverters for low voltage and small capacity, while multi-level inverters are used for medium voltage and large capacity. 3. Control method of pulse width modulation variable voltage Inverter : Sine wave pulse width modulation (SPWM) control. PWM control to eliminate specified harmonics. Current tracking control. Voltage space vector control (flux tracking control). 4.  Progress in variable frequency adjustment control methods for AC motors: from scalar control (V/f control and slip frequency control) to vector control and direct torque control with high dynamic performance. Develop vector control and direct torque control systems without speed sensors.   Our team of experienced professionals is dedicated to delivering personalized services that exceed our customers' expectations. We offer a diverse range of services,including after-sales and maintenance, among others. Our team is composed of experienced engineers and technicians who are highly skilled in the maintenance and troubleshooting of Inverters.  In conclusion, Rockss Automation Technology Co. Ltd. is the perfect partner for all your automation needs. Whether you need Inverters for industrial, manufacturing, or commercial purposes, we have it all. Our commitment to providing quality products and services at competitive prices, coupled with our experienced team of professionals, is what sets us apart. Contact us today and let us help you streamline your automation needs.

Fault symptom 1: 1. Phenomenon description: Touch does not respond, click on the screen cursor and it does not move. 2. Reason analysis: ① Is the driver installed correctly; ② Whether the connection line between the touch screen and the touch card is normal; ③ Whether the connection line between the touch card and the mainboard is normal; ④ Whether the touch screen or touch card is damaged or abnormal; ⑤ Is there any error message in the operating system (Windows); ⑥ Is there any hardware or software conflict or incompatibility between the operating system (Windows) and the touch screen. 3. Solution: ① Install the driver correctly, and pay attention to two points: one is to remove the RS232 interface option during the installation of the resistance screen driver (see the manual for details), and the other is that the capacitive screen does not require manual installation of the driver, and the operating system (Windows) will automatically recognize it; ② Check whether the connection line between the touch card and the built-in USB plug on the motherboard is normal. Re plug or replace the line to test, but pay attention to the correct position and direction of the plug to avoid circuit burning; ③ Check whether the connection line between the touch screen and the touch card is normal. Re plug or replace the line to test, but pay attention to the correct position and direction of the plug to avoid circuit burning; ④ Check if the touch screen or touch card is damaged, replace the touch screen or touch card for testing; ⑤ If an error message appears in the operating system (Windows), you can choose to replace another host or reinstall the operating system; ⑥ When there is a hardware or software conflict or incompatibility between the operating system (Windows) and the touch screen, please replace the operating system version.   SIEMENS 6AV6643-0CD01-1AX1 Touch Panel Fault phenomenon 2: 1. Phenomenon description: The touch position and display cursor position are different (deviated or reversed, or the main and secondary screens are reversed). 2. Reason analysis: ① Whether incorrect calibration has been carried out; ② The resolution of the display was changed without calibration; ③ Is there any electromagnetic interference from other high-frequency devices on the current touch card; ④ The touch screen or touch card may be damaged or abnormal; 3. Solution: ① To calibrate a resistive touch screen, it is necessary to first clear and calibrate it using the driver program, and then use a linear setting of 9 or 25 points to accurately calibrate it. At the same time, it should be noted that when making calibration settings, the eyes must be perpendicular to the calibration point on the screen, and then use a touch pen to click on the center point; In general, capacitive screens do not require calibration operations. First, check whether the connection between the touch screen cable and the touch card is loose or skewed. After power off, reconnect correctly. If manual calibration is required, open the Tablet PC in the control panel, click on calibration, and follow the prompts on the screen to calibrate; ② Recalibrate at the new resolution (calibration method as above); ③ Replace the connection cable between the touch card and the motherboard (you can choose a cable body with a magnetic ring and pay attention to the correct plug direction and position), or move the touch card to a place with less interference for testing; ④ Replace the touch screen or touch card before testing.     6AV6643-0BA01-1AX0 SIEMENS Touch Screen Fault phenomenon 3: 1. Phenomenon description: The cursor is fixed at a certain point on the screen 2. Reason analysis: ① Whether incorrect calibration has been carried out; ② The touch screen is installed too tightly or with deviation, and the outer frame is pressed inside the touch area; ③ The touch screen or touch card may be damaged or abnormal. 3. Solution: ① Perform correct calibration again (the same method as fault 2 ①); ② Adjust the tightness of the screen border appropriately or reinstall the touch screen; ③ Replace the touch screen or touch card before testing.     Allen-Bradley 2711P-T15C21D8S Terminal Fault phenomenon 4: 1. Phenomenon description: No response in a certain area of the touch screen 2. Reason analysis: ① Whether incorrect calibration has been carried out; ② Whether it matches the current drive; ③ The screen may be damaged or abnormal. 3. Solution: ① Perform correct calibration again (the same method as fault 2 ①); ② Uninstall the incorrect driver, restart, and then install the correct driver (see instructions for installation methods); ③ Replace the touch screen or touch card before testing.       Beijer Mac Mta E700 Panel Fault phenomenon 5: 1. Phenomenon description: The cursor jumps on the screen 2. Reason analysis: ① Is the current touch card experiencing excessive temperature or electromagnetic interference from other high-frequency devices; ② The power supply of the touch card is unstable; ③ The touch screen or touch card may be damaged or abnormal. 3. Solution: ① Replace the connection cable between the touch card and the motherboard (you can choose a cable body with a magnetic ring and pay attention to the correct direction and position of the plug), or lower the temperature of the touch card or move it to a place with less interference for testing; ② Replace the power adapter or better quality plug; ③ Replace the touch screen or touch card before testing.      With a vast inventory of various brands and models, we offer a seamless blend of sales and repair services. Whether you're looking to acquire new touch screens or repair your existing ones, Rockss Automation has got you covered. Our team of dedicated experts understands the importance of customer satisfaction and strives to provide exceptional service that is tailored to your unique requirements. We take great pride in our attention to detail and commitment to providing only the highest quality products and services.

With the development of information technology, touch screens, with their advantages such as ease of use, durability, fast response speed, and space saving, have made system designers increasingly feel that using touch screens does have significant advantages. What is touch screen and what types of touch screens are there? Let's learn more together! SIEMENS 6AV6643-0BA01-1AX0  Touch Screen What is a touch screen? Touch screen, also known as "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. When touching graphic buttons on the screen, the touch feedback system on the screen can drive various connection devices according to pre programmed programs, which can replace mechanical button panels and create dynamic audio and video effects through the LCD display screen. As the latest computer input device, touch screen is currently the simplest, convenient, and natural way of human-computer interaction. It gives multimedia a new look and is a highly attractive new multimedia interactive device. Mainly used for public information query, leadership office, industrial control, military command, electronic games, ordering, multimedia teaching, real estate pre-sale, etc.   Allen-Bradley 2711P-RN6 Touch Screen What are the characteristics of a touch screen? 1) Transparency directly affects the visual effect of the touch screen. Transparency has a problem with the degree of transparency. The infrared technology touch screen and the Surface acoustic wave touch screen are separated by only one layer of pure glass, and transparency can be regarded as an outstanding one. Other touch screens need to be carefully studied. "Transparency" is a very general concept in the touch screen industry. Many touch screens are multi-layer composite films. It is not enough to summarize its visual effect by using transparency only. It should include at least four characteristics: transparency Color distortion, reflectivity, and clarity can be further divided. For example, the degree of reflection includes mirror reflection and diffraction reflection. However, the diffraction reflection on the touch screen surface has not yet reached the level of a CD drive. For users, these four metrics are basically sufficient. Beijer Mac Mta E700 Panel 2) The touch screen is an absolute coordinate system, and you can simply click on it wherever you want. The essential difference from relative positioning systems like mice is the intuitive nature of being in place at once. The output data of the same point on the touch screen is required to be stable under any circumstances. If it is not stable, then the touch screen cannot guarantee absolute coordinate positioning, and the point is inaccurate. This is the problem that the touch screen is most afraid of: drift. Technically, any touch screen that cannot guarantee the same sampling data at the same point of touch has the problem of drift. Currently, only capacitive touch screens have the phenomenon of drift. Mitsubishi GT1150-QBBD-C GOT1000 Touch Panel 3) Detect touch and locate. Various touch screen technologies rely on their own sensors for operation, and even some touch screens themselves are a set of sensors. The respective positioning principles and sensors used determine the response speed, reliability, stability, and lifespan of touch screens. With a vast inventory of various brands and models, we offer a seamless blend of sales and repair services. Whether you're looking to acquire new touch screens or repair your existing ones, Rockss Automation has got you covered. Our team of dedicated experts understands the importance of customer satisfaction and strives to provide exceptional service that is tailored to your unique requirements. We take great pride in our attention to detail and commitment to providing only the highest quality products and services.  

What is a Inverter？  The Inverter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The Inverter mainly consists of rectifier (AC to DC), filter, inverter (DC to AC), braking unit, driving unit, detection unit, microprocessor unit, etc. The Inverter adjusts the voltage and frequency of the output power supply by breaking the internal IGBT, providing the required power voltage according to the actual needs of the motor, thereby achieving energy conservation and speed regulation. In addition, the Inverter also has many protection functions, such as overcurrent, overvoltage, overload protection, and so on. With the continuous improvement of industrial automation, Inverter have also been widely used.   A Inverter is a device that converts industrial frequency power sources (50Hz or 60Hz) into AC power sources of various frequencies to achieve variable speed operation of the motor. The control circuit controls the main circuit, the rectifier circuit converts AC power into DC power, the DC intermediate circuit smooths and filters the output of the rectifier circuit, and the inverter circuit converts DC power back into AC power. For inverters such as vector controlled inverters that require a lot of computation, sometimes a CPU for torque calculation and some corresponding circuits are also required. Variable frequency speed regulation is achieved by changing the frequency of power supply to the stator winding of the motor.     Our company has a large inventory, including different brands, such as Siemens Inverters, ABB Inverters, Yaskawa Inverters, Mitsubishi Inverters, Schneider Inverters, American AB Rockwell Inverter and German KEB Kobe Inverter.etc   Function of Inverter   There are various classification methods for Inverter, which can be divided into voltage type Inverter and current type Inverter according to the working mode of the main circuit; According to the classification of switch modes, it can be divided into PAM controlled Inverter, PWM controlled Inverter, and high carrier frequency PWM controlled Inverter; According to the working principle, it can be divided into V/f control Inverter, slip frequency control Inverter, vector control Inverter, etc; According to the classification of purposes, it can be divided into general Inverter, high-performance specialized Inverter, high-frequency Inverter, single-phase Inverter, and three-phase Inverter.   Troubleshooting of Inverter With the continuous improvement of industrial automation, they have been widely used. So what are the common faults of Inverter and how can they be resolved?   Problem 1: Communication failure between the motherboard and PLC Fault symptom: 1) The touch screen of the Inverter reports a communication fault between the motherboard and PLC, and the PPI cable receiving light RX light is off or not flashing. The power indicator lights on the motherboard are off. High voltage is still applied to the module input, and the module output is blocked. 2) The touch screen of the Inverter reports a communication fault between the motherboard and PLC, and the PPI cable transmission light TX light is off or not flashing. 3) The touch screen reports a communication fault between the motherboard and PLC, and the PPI cable power light POW is not on. Fault cause: 1) During the operation of the Inverter, due to a malfunction in the power supply switch PW1 of the motherboard or the DC power supply on the motherboard, the power supply of the entire motherboard is lost, and the IGBT switch signal stops. Therefore, a communication failure between the motherboard and PLC is reported; Module blocking output; At the same time, due to the power loss of the motherboard, the fault trip signal cannot be sent out, and high voltage is continuously applied to the module. 2) The motherboard cannot receive the communication signal sent by the PLC, and there is a problem with the communication part of the PLC itself.  Resolvent: 1) Install an active isolation transmitter between the DCS given signal and the motherboard signal acquisition circuit. 2) Change the functional parameter of Inverter 117 (given frequency threshold) from 0 to 30, without the need to install an isolation transmitter.     Problem 2: The Inverter does not respond when given a frequency The remote DCS provides a certain frequency, and the Inverter touch screen does not adjust the speed after receiving the frequency. Fault cause: When the PLC determines that the system is in the "remote control" mode, the main control can only receive remote 4-20ma signals for frequency adjustment. Therefore, the main reason for the DCS given frequency system not regulating speed is that 1) the control method (function number 207) accepted by the main control is incorrect; 2) The frequency setting mode (function number 208) in panel control mode is incorrect.  Resolvent: 1) Rotate the rotary button on the control cabinet door to set the function number 207 to 1, which is remote control mode. 2) Select the frequency setting mode under panel control mode, with function number 1, that is, analog input AI frequency setting.    Problem3: 'Please close the high voltage' issue Fault symptom: 1) The Inverter changed from a "system ready" state to a "please turn on high voltage" state, and the process change delay was only set to 60 seconds. After disconnecting the high voltage for 60 seconds, the "please turn on high voltage" was uploaded to the DCS, and the operator re turned on the high voltage, causing the fuse of 16 modules to burn out. 2) Due to the user's refusal to introduce the "please switch on high voltage" status into the DCS system, the Inverter was disconnected due to other equipment failures. The operator did not delay the high-voltage switch for 300s according to regulations before switching on the high voltage again. Instead, they urgently switched on the high-voltage switch of the Inverter, resulting in the fuse of 16 modules being burned out. Fault cause: Due to the high voltage power outage of the Inverter, the power inside the capacitor in the module cannot be immediately discharged, which requires a certain amount of time. At this time, the high voltage is reconnected, causing a short circuit and burning the fuse. Resolvent: 1) Set the time from the "System Ready" state to the "Please Close High Voltage" state to 300S. 2) On site installation and debugging must connect the "Please Close High Voltage" signal to the user's DCS system, and ensure that the thermal engineering performs interlocking protection in the closing circuit.   Problem 4: System output overcurrent and overload Fault symptom: 1) During the normal operation of the Inverter, the system output overcurrent or output overload fault causes the Inverter to shut down due to a serious fault. 2) The Inverter shuts down due to system output overload or system overcurrent fault during the acceleration process. 3) The Inverter reported overcurrent during startup.  Fault cause: 1) The possible reasons for the sudden output overload or overcurrent of the Inverter during normal operation may be due to fluctuations in bus voltage, sudden increase in load startup, or a fault in the frequency conversion output current sampling circuit that causes excessive frequency conversion current collection. 2) Current sensor failure or motherboard signal acquisition circuit failure, resulting in incorrect operation of the Inverter. 3) The Invertern outputs overload or overcurrent during the acceleration process mainly because the acceleration time is too fast. 4) Due to the load during the start-up process of the Inverter (mainly due to the reverse action of the fan on the opposite side) being in a drooping state or the motor load being stuck. Resolvent: 1) During the normal process, the sudden overload and overcurrent of the Inverter are mainly caused by confirming the cause of the trip. If it is caused by changes in the power grid or sudden load changes, the Inverter should be restarted. If it is caused by a fault in the Inverter acquisition circuit itself, the corresponding wiring and Hall sensor should be checked. 2) During the speed up process of the Inverter, if the system output is overloaded or the system overcurrent causes a malfunction and shuts down, the corresponding up and down speed up times should be modified, and the time should be set as large as possible. 3) Ensure that the fan load is at a standstill during startup; Modify the DCS startup logic of the fan, close all inlet and outlet dampers before starting the motor, and then open them after starting to avoid current impact; Start the power frequency first and then start the Inverter; Set the torque increase in the function number to increase the starting torque of the Inverter.    Problem 5: Module DC overvoltage Fault symptom: 1) During the shutdown and speed reduction process of the Inverter, multiple module DC overvoltage faults occurred, causing the user's high-voltage switch to trip. 2) The user's bus voltage is too high. The actual bus voltage of the 6KV power supply is above 6.3KV, and the actual bus voltage of the 10KV power supply is above 10.3KV. When the bus voltage is applied to the Inverter, the module input voltage is too high, and the module reports DC bus overvoltage. 3) During the startup process of the Inverter, approximately until it reaches 4HZ, the DC bus of the Inverter is overvoltage. Fault cause: 1) During the shutdown process of the Inverter, the speed reduction time is too fast, causing the motor to be in the generator state. The motor feeds back energy to the DC bus of the module, generating a pump up voltage, which leads to a high voltage on the DC bus. 2) Due to the factory standard wiring of on-site transformers being 10KV and 6KV, if the bus voltage exceeds 10.3KV or 6.3KV, it will cause the output voltage of the transformer to be too high, resulting in an increase in the bus voltage of the module and causing overvoltage. 3) Different phase modules at the same position have fiber optic connections reversed (such as A4 and B4 fiber optic connections reversed), resulting in overvoltage in their phase voltage output. Resolvent: 1) Extend the up/down time and down time appropriately. 2) Raise the overvoltage protection point inside the module to 1150V. 3) Change the short-circuit terminal of the transformer to 10.5KV (6.3KV) when the user voltage reaches 10.3KV (6KV) or above. 4) Check if the optical fiber is inserted incorrectly and correct the incorrect fiber.   Problem 6: Module communication failure Fault symptom: During the operation of the Inverter, there is a serious fault that trips and shuts down, and the touch screen reports a module communication fault.  Fault cause: 1) The input fuse, rectifier bridge, and charging resistor of the module are burnt out, causing the module control to lose power and communication to be unable to proceed. 2) The optical communication sub board on the motherboard is faulty or protected by the protection diode of the communication circuit power supply. 3) The connecting optical fiber is inserted in the wrong position or the optical fiber is broken or damaged. 4) The output voltage of the power board in the module is abnormal or there is no output, causing communication interruption in the module.  Resolvent: 1) Open the module cover and replace any damaged components such as fuses and charging resistors in the module. 2) Replace the damaged optical circuit board or protective diode. 3) The optical fiber is connected normally according to the markings, and if the optical fiber is damaged, it should be replaced. 4) Replace the module power board. Our company is a global supplier of new and used surplus products. It has grown to become one of the largest wholesale suppliers of industrial and automation products, serving customers worldwide 24 hours a day. We offer hundreds of thousands of parts and strive to source and supply your parts at a fraction of the retail cost.

Motion control card: based on PC interface, because of the powerful function of PC, the motion controller composed with PC has the strongest function, but its working stability and reliability are poor. The motion control card is inserted into the PC host through a PCI slot; Develop using advanced programming languages such as C++, C #, VB, * * *. NET, and labview; Use the control card API interface functions provided by the motion control card manufacturer in programming to achieve the use of control card resources; The motion control card controls the servo motor or stepper motor by sending pulses to the servo or stepper driver, and controls the IO of relays, sensors, cylinders, etc. by reading input signals and controlling output signals; The main advantage of motion control cards lies in utilizing the powerful functions of PCs, such as CAD, machine vision, and advanced software programming; Utilizing the functions of FPGA+DSP/ARM+DSP chips to achieve high-precision motion control (multi axis linear and arc interpolation, motion following, PWM control, etc.). The Motion control card has the following distinctive features: (1) The hardware composition is simple. Insert the motion controller into the PC bus and connect the signal line to form the system; (2) Can use the rich software already available on a PC for development; (3) The code of motion control software has good universality and portability; (4) There are many engineering personnel available for development work, and there is no need for too much training work to proceed with development.   PLC: Its main function is to perform logical control of switching values, and it has simple motion control (linear trajectory control), calculation, data processing, and other functions. Usually, a touch screen is used as the human-machine interface. It has the advantages of reliable operation and simple programming, but its motion control function is relatively simple. The application process of PLC mainly relies on PLC+HMI, which greatly limits the visualization interface. The biggest problem in practical application is that the mapping function cannot be achieved; Nowadays, due to the rapid development and application of machine vision, the integration of PLC and machine vision is very difficult; At present, some manufacturers provide PLC with a machine vision solution, where an independent PC processes the visual part and sends the processing results to the PLC, which then applies the received data for operation. This approach increases development costs, and a control system requires two sets of software to execute.  PLC has the following distinct characteristics: 1. Easy to use and simple programming 2. Strong functionality and high cost performance ratio 3. Complete hardware support, convenient for users to use, and strong adaptability 4. High reliability and strong anti-interference ability 5. Low workload in system design, installation, and debugging 6. Small maintenance workload and convenient maintenance   Difference between motion controller and PLC: 1. Motion control card: A motion control card is a circuit board that controls the movement of motors, such as stepper motors and servo motors. It can be used to control the speed, position and acceleration of the motor. 2. PLC: A programmable logic controller (PLC) is an industrial digital computer which has been designed for the specific purpose of controlling machines and processes. It uses a programmable memory to store instructions and execute specific functions such as logic, sequencing, timing, counting and arithmetic operations to control machines and processes. To distinguish between motion control cards and PLCs, it is important to consider their main differences in terms of functionality, cost, size and complexity. Motion control cards are typically more cost-effective than PLCs due to their smaller size and simpler design. They are also easier to use since they require less programming knowledge than PLCs. However, they are limited in terms of features compared to PLCs as they cannot perform complex tasks such as data logging or communication with other devices. PLC are more expensive than motion control cards but offer more features due to their larger size and more complex design. They can be programmed for complex tasks such as data logging or communication with other devices. They also require more programming knowledge than motion control cards but offer greater flexibility in terms of programming options. When selecting between a motion control card or a PLC for a particular application, it is important to consider the cost, size, complexity and features required for the task at hand before making a decision. Here are several PLC products from our company: 1.Allen-Bradly:1769-OF8V, 1769-L33ER, 1769-L18ERM, 1766-L32BXB, 1757-SRM, 1756-ENBT 2.OMRON：CVM1-PA208, C500-OC224, C500-ID218, CV500-RT211 3.B&R ：2CP104.60-1, 2CP200.60-1, 2DO428.6, 2DI426.6, 2PS740.9,2AT300.6,,2DS100.60-1 4.SIEMENS：6ES7223-1PL22-0XA8, 6ES7214-2BD23-0XB8, 6ES7221-1BH22-0XA8,  6ES7231-0HC22-0XA8, 6ES7232-0HB22-0X  

A servo motor is a type of electric motor used in precise motion control systems that require high accuracy and positioning. It uses a feedback control system to monitor and adjust its position and speed, allowing it to move precisely to specific angles or distances. Servo motors are commonly used in robotics, CNC machines, and automation systems. They can provide high torque and speed while maintaining high accuracy and reliability. The servo motor can control speed with very accurate position accuracy, and can convert voltage signals into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by input signals and can react quickly. In automatic control systems, it is used as an executing element and has characteristics such as small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It is divided into two categories: DC and AC servo motors, and its main feature is that there is no self rotation phenomenon when the signal voltage is zero, and the speed decreases uniformly with the increase of torque. Our company sells various brands of servo motors, such as 1.Allen-Bradley: 1326AB-B740C-S2L, 2004-RZ02BA1AN3, H-4050-P-H00AA, HPK-B1307C-MB44AA, MPL-A420P-SJ72AA, MPL-A430H-HJ24AA, MPL-B420P-MJ22AA, MPL-B430P-MJ24AA, RSMZ-04BH6ANK3, RSMZ-08BH6ABK3, TL-A2530P-HJ32AN 2.ABB: 3HAC17327-1/01、LC440TGR0002, PS-130/6-50-2P-PMB-4056, PS-130/6-60-P-LSS-4057, PS-90/6-57-P-LSS-4280,               PS-90/6-79-P-PMB-3773, SDM251-000N5-055/40-2000, SDM251-000N5-055/60-2000, T4F2BR0511 3.SIEMENS: 1FK6042-6AF71-1TA0, 1FK7063-5AF71-1KH5,A5E03326159, 6SN2132-1CU11-1BA0,6SL3000-0CE15-0AA0, 6SL3562-6DF71-0RG1,1FK6042-6AF71-1TH2-Z,1FK6060-6AF71-1TA0,1FK6063-6AF71-1TG0 4.CT/Emerson: 107U2B200VBFCA13014X, 75DSA600C, 95DSC600C, R142DSC450C, XVM-402-TONS-D001,                             95EZA300CACAA-UL,142U2D150CACAB165240 5.SANYO: 103-546-0241, P20B13500HXSH6E, P50B07040DXSG2, R2AA08040FCHCW, V404T-012,                    V506BT-412, 103H8222-5111,R2AA08075FXPF6,P50B04010DCL9W 6.Lenze: CFM71M/BR/HR/TF/RH1L/SB50, MDSKABS080-22, MDSKSBS056-33, SSN40-1GVAR-063C22,MDSKSRS036-13   So, how is the servo motor debugged before use? 1. Initialization parameters    Before wiring, initialize the parameters first.   On the control card: select the control method; Clear the PID parameters to zero; When the control card is powered on, the default enable signal is turned off; Save this state to ensure that the control card is in this state when powered on again.   On the servo motor: set the control mode; Set to enable external control; The gear ratio output by the encoder signal; Set the proportional relationship between the control signal and the motor speed. It is recommended to set the maximum design speed during servo       2. Wiring   Power off the control card and connect the signal wire between the control card and the servo. The following lines must be connected: the analog output line of the control card, the enable signal line, and the encoder signal line of the servo output. After reviewing the wiring without any errors, power on the servo motor and control card (as well as PC). At this point, the motor should not move and can easily rotate with external force. If this is not the case, check the setting and wiring of the enable signal. Rotate the motor with external force and check if the control card can correctly detect changes in motor position. Otherwise, check the wiring and settings of the encoder signal.      3. Test direction   For a closed-loop control system, if the direction of the feedback signal is not correct, the consequences will definitely be catastrophic. Turn on the enable signal of the servo through the control card. This is when the servo should rotate at a lower speed, which is known as "zero drift" in legend.   Generally, there are instructions or parameters on the control card to suppress zero drift. Use this command or parameter to see if the speed and direction of the motor can be controlled through this command (parameter).   If it cannot be controlled, check the parameter settings of the analog wiring and control method. Confirm that a positive number is given, the motor rotates forward, and the encoder count increases; Given a negative number, the motor rotates in reverse and the encoder count decreases.   If the motor carries a load and has limited travel, do not use this method. Do not apply excessive voltage during testing, it is recommended to keep it below 1V. If the directions are inconsistent, the parameters on the control card or motor can be modified to make them consistent.      4. Suppress zero drift   In the closed-loop control process, the presence of zero drift will have a certain impact on the control effect, and it is best to suppress it. Use the control card or servo to suppress zero drift parameters and carefully adjust them to make the motor speed approach zero. Due to the randomness of zero drift itself, it is not necessary to require the motor speed to be absolutely zero.      5. Establish closed-loop control   Once again, release the servo enable signal through the control card and input a small proportional gain on the control card. As for how large it is, it can only be considered small based on feelings. If you are really not confident, enter the minimum value allowed by the control card. Turn on the enable signal of the control card and servo. At this point, the motor should be able to roughly follow the motion instructions.      6. Adjusting closed-loop parameters   Fine tuning of control parameters to ensure that the motor moves according to the instructions of the control card is a necessary task, and this part of the work is more about experience, which depends on daily accumulation.  

What is the PLC? PLC (Programmable Logic Controller) is a widely used programmable controller in the industrial field. The application of PLC technology can achieve digital, networked, and automated control of various production equipment, improving production efficiency and work quality. With the continuous improvement of industrial automation level, the application range of PLC is also expanding.   Basic structure A PLC is essentially a computer dedicated to industrial control, with a hardware structure similar to that of a microcomputer, consisting of a CPU, I/O board, display panel, memory, and power supply.  1. Power supply The power supply of PLCs plays a very important role in the entire system. Without a good and reliable power supply system, it cannot work properly. Therefore, manufacturers of PLCs also attach great importance to the design and manufacturing of power supplies. Generally, the fluctuation of AC voltage is within the range of+10% (+15%), and the PLC can be directly connected to the AC power grid without taking other measures  2. Central Processing Unit (CPU) The central processing unit (CPU) is the control center of a PLC. It receives and stores user programs and data input from the programmer according to the functions assigned by the PLC system program; Check the status of power supply, memory, I/O and alert timer, and diagnose syntax error in user program. When the PLC is put into operation, it first receives the status and data of various input devices on site through scanning, and stores them in the I/O image area respectively. Then, it reads user programs one by one from the user program memory, interprets commands, and executes logical or arithmetic operations according to the instructions. The results are sent to the I/O image area or data register. After all user programs have been executed, the output states or data in the output registers of the I/O image area are finally transmitted to the corresponding output devices, and the cycle continues until it stops running. In order to further improve the reliability of PLCs, redundant systems with dual CPUs or voting systems with three CPUs are also used for large programmable logic controllers. In this way, even if a CPU fails, the entire system can still operate normally.  3. Memory The memory that stores system software is called system program memory. The storage for storing application software is called user program storage. 4. Input output interface circuit 1) The on-site input interface circuit consists of an optical coupling circuit and an input interface circuit of a microcomputer, serving as the input channel for the interface between the PLC and the on-site control. 2) The on-site output interface circuit is integrated with output data registers, gate circuits, and interrupt request circuits, and functions as a PLC to output corresponding control signals to the on-site execution components through the on-site output interface circuit.  5. Functional modules Functional modules such as counting and positioning. 6. Communication module       Our company Rockss Automation Technology Co. Ltd. has been a leading provider of automation solutions for several years, and with our extensive inventory, we can fulfill all your automation needs. Our PLCs are of the highest quality and trusted by businesses of all sizes worldwide.      We have a wide range of PLCs available, and each of them is designed to meet specific needs. Our PLCs are developed to maximize efficiency and cut costs while providing reliable and accurate automation solutions. They are also manufactured using the latest technology and the highest quality materials, ensuring excellent performance and longevity.     Functional characteristics PLCs have the following distinct characteristics.   1. Easy to use and simple programming Adopting concise programming languages such as ladder diagrams, logic diagrams, or statement tables without the need for computer knowledge, the system development cycle is short and on-site debugging is easy. In addition, the program can be modified online to change the control scheme without dismantling the hardware.   2. Strong functionality and high cost performance ratio A small PLC has hundreds or thousands of programming components available for users to use, which have strong functions and can achieve very complex control functions. Compared with relay systems with the same function, it has a high cost performance ratio. PLC can achieve decentralized control and centralized management through communication networking.   3. Complete hardware support, convenient for users to use, and strong adaptability PLC products have been standardized, serialized, and modularized, equipped with a variety of hardware devices for users to choose from. Users can flexibly and conveniently configure the system to form systems of different functions and scales. The installation and wiring of PLC is also very convenient, usually connected to external wiring through terminal blocks. PLC has strong load capacity and can directly drive general solenoid valves and small AC contactors. After the hardware configuration is determined, the user program can be modified to quickly and conveniently adapt to changes in process conditions.   4. High reliability and strong anti-interference ability Traditional relay control systems use a large number of intermediate relays and time relays, which are prone to malfunctions due to poor contact of the contacts. PLC replaces a large number of intermediate relays and time relays with software, leaving only a small number of hardware components related to input and output. The wiring can be reduced to 1/10-1/100 of the relay control system, greatly reducing faults caused by poor contact of contacts. PLC adopts a series of hardware and software anti-interference measures, with strong anti-interference ability, with an average time between failures of tens of thousands of hours or more. It can be directly used in industrial production sites with strong interference. PLC has been recognized by users as one of the most reliable industrial control equipment.   5. Low workload in system design, installation, and debugging PLC replaces a large number of intermediate relays, time relays, counters and other devices in the relay control system with software functions, greatly reducing the workload of control cabinet design, installation, and wiring. The ladder diagram program of PLC is generally designed using sequential control design method. This programming method is very regular and easy to master. For complex control systems, designing a ladder diagram takes much less time than designing a circuit diagram for a relay system with the same function. The user program of PLC can be simulated and debugged in the laboratory, with input signals simulated using small switches. The status of the output signal can be observed through the LED on the PLC. After completing the installation and wiring of the system, problems discovered during the on-site debugging process can generally be solved by modifying the program, and the debugging time of the system is much shorter than that of the relay system.   6. Small maintenance workload and convenient maintenance The fault rate of PLC is very low, and it has complete self diagnosis and display functions. When a malfunction occurs in the PLC or external input devices and actuators, the cause of the malfunction can be quickly identified based on the information provided by the LED or programmer on the PLC. Replacing the module can quickly eliminate the problem.       At Rockss Automation Technology Co. Ltd., we are committed to providing our clients with nothing but the best. That's why we have a range of brands to choose from, including Siemens, Allen-Bradley,SIEMENS , and more. With our vast inventory, we can supply PLCs for industries such as automotive, pharmaceuticals, food and beverage, and more.    Below is an introduction to several brands of PLC sold by our company: 1.Allen-Bradley PLC 2.B&R PLC 3.SIEMENS PLC   4.ABB PLC 5.Schneider PLC    Our team of experienced professionals is dedicated to delivering personalized services that exceed our customers' expectations. We offer a diverse range of services,including after-sales and maintenance,among others. Our team is composed of experienced engineers and technicians who are highly skilled in the maintenance and troubleshooting of PLCs.    When you purchase PLCs from us, you can rest assured you are getting the best value for your money. With our competitive pricing, exceptional quality, and unparalleled service, we want to ensure our customers have nothing but the best experience when they partner with us.    In conclusion, Rockss Automation Technology Co. Ltd. is the perfect partner for all your automation needs. Whether you need PLCs for industrial, manufacturing, or commercial purposes, we have it all. Our commitment to providing quality products and services at competitive prices, coupled with our experienced team of professionals, is what sets us apart. Contact us today and let us help you streamline your automation needs.

   The scientific PLC programming steps are actually very simple, but often most engineers consider them simple and overlook many details. Neglecting details will inevitably lead to problems in the future. To avoid future problems, only by following the rules well can we avoid them. Nothing can be accomplished without norms or standards, and PLC programming also has its own rules.  The following nine steps are for reference.   Step 1: Read the product manual The first step may seem simple enough, but many engineers cannot do it. Believing that this step is a waste of time, even relying solely on supplier training to understand the equipment. Carefully reading the instruction manual is the first step in programming. The first step is to read the safety regulations, know which executing mechanisms may cause personal injury, which mechanisms are most prone to collisions, and how to solve the most fatal problems when danger occurs. These are all in the safety regulations, why not look? In addition, the characteristics, usage, and debugging methods of each component of the equipment are also included in the manual. Even if the program is correct, if the components are not properly debugged, the equipment will still not work. Furthermore, all circuit diagrams, pneumatic hydraulic circuit diagrams, and assembly drawings are also included in the manual. Without reading them, how can one know what modifications can be made to each component.   Step 2: Check the I/O according to the manual Check I/O, commonly known as "management". There are many ways to check I/O, but it is necessary to check them in order according to the addresses provided in the manual, and in an absolutely safe situation. When checking input points, the general input signals are various sensors, such as capacitors, inductors, optoelectronic, piezoresistive, ultrasonic, magnetic induction, and travel switches. Checking these components is relatively simple. According to the component instructions, place the workpiece on the workstation or move the actuator to check if there is a signal from the sensor. Of course, the detection methods for different devices may vary depending on the specific situation. But be extra careful when checking the output signal. If it is an electric drive product, it is necessary to power on the actuator drive under safe conditions, especially to ensure that the equipment does not collide, and check whether the actuator can move. If it is a hydraulic or pneumatic actuator, manually power on the directional valve under safe conditions to control the actuator. When checking the output signal, regardless of the driving mode of the actuator, it is necessary to follow the component manual to ensure the safety of the equipment and personnel. It should be noted that not all actuators of the equipment can be powered on for testing, so sometimes individual output signals may not be able to be manually tested. Whether it is an input or output device, when the sensor has a signal or the driving device of the actuator is powered on, it is necessary to simultaneously check whether the I/O module indicator light on the PLC is also on. In many devices, the input and output signals are connected to the PLC through wiring terminals. Sometimes, the indicator light of the wiring terminal has a signal, but it cannot be guaranteed that due to an internal open circuit in the connecting wire, there is no signal connected to the corresponding address on the PLC. This requires special attention. After measuring the input and output signals, the measured address should be recorded simultaneously to ensure that the signal address is consistent with the instructions. If there are differences, measure the equipment address again. If the measurement is still inconsistent multiple times, contact the equipment manufacturer first because at this time, it cannot be guaranteed that the address provided by the manufacturer is correct.   Step 3: Open the programming software, configure the hardware, and write the I/O address in the symbol table Different PLCs use different programming software. However, for any software, the first step before programming is to configure the hardware and establish the corresponding communication configuration based on the actual PLC type. After the hardware configuration is completed, write the I/O addresses previously recorded on paper in the software's symbol table. Due to different software, the definition of symbol tables may vary, but general software has this function, and this step is crucial. When writing a symbol table, it is not only important to write the absolute addresses of device input and output correctly, but also to name and add comments to each address, which will be very convenient for future programming. You don't need to query the absolute address every time during programming, just fill in the named name. Of course,it also depends on whether the software has this feature.   Step 4: Write a program flowchart Before programming, it is important to write a flowchart of the program on a draft. A complete program should include the main program, stop program, emergency stop program, reset program, and other parts. If the software allows, each program should be written in the form of "blocks", that is, a program is a block, and ultimately each block can be called as needed. PLC is best at handling sequential control, where the main process is the core. It is important to ensure that the established process is correct and carefully check it on the draft. If there are problems with the main program, it is very likely that the program will collide, damage the equipment, or pose a danger to personnel after being executed by the PLC.   Step 5: Write a program in the software Once there are no issues with the main process, you can write the program in the software. In addition, it is important to pay attention to the correctness of the stop, emergency stop, and reset procedures, especially the stop and emergency stop procedures, which are the most important procedures related to personal safety and equipment safety and cannot be underestimated. It is important to ensure that under any circumstances, as long as the stop or emergency stop program is executed, the equipment will never cause harm to personnel.   Step 6: Debugging the program In the step of debugging the program, it can be divided into two aspects. 1. If conditions permit, or if your logical ability is strong, you can first use the simulation function of the software to test, but many cumbersome programs are difficult to use software simulation to see if the program is correct. 2.Download the program to the PLC for online debugging. If the device does not move or there are abnormal situations during operation, do not modify the program first. It is likely that the sensor has not been debugged properly. If the sensor is correct, then modify the program.   Step 7: After debugging is completed, edit the program again In the previous debugging step, due to modifications made to the program, it was necessary to check or edit the entire program again, and then download the final program to the PLC.   Step 8: Save the program In this step, one question to note is where should the program be saved? PC hard drive? Flash device? mobile hard disk drive? Of course, none of these are possible. All these storage devices may be infected with viruses. So, it is necessary and only possible to burn the program onto a CD. And there is another question, which program is the firing program? Previously, we have downloaded the final debugging and modification program to the PLC. If the PLC is completely correct when executing the program, we will upload the program to the PC and burn it onto a CD. Everything above is for safety.   Step 9: Fill out the report After completing the programming, the final debugging report should be filled out, and the problems encountered and some difficult issues in the program should be recorded one by one. Because after a long time, I will also forget some techniques of the program, and it will also facilitate other colleagues to understand the program you have written.     Our company Rockss Automation have a variety of inventory and different brands of products to choose from. Our vast inventory includes products from various well-known brands, all of which are easily accessible and easy to search for. Whether you're looking for machinery, equipment, or tools, our company has got you covered.     Choose from our extensive range of high-quality, reliable products, and experience the convenience of having everything you need in one place. From sourcing to delivery, our expert team will be with you every step of the way, ensuring a smooth and hassle-free experience.

          The use of Inverters in modern industry has become very common. Although the use of Inverter is becoming safer, more efficient, and more energy-efficient, it is also inevitable that Inverter will malfunction during operation. When the Inverter malfunctions, the corresponding fault code usually appears. So what are the faults that occur in the Inverters when these fault codes appear? How should we handle it? The following nineteen common fault codes and their handling methods are for reference only. 1. Inverter overcurrent fault ※ Fault code: OCF (1) Fault name: Inverter overcurrent fault (2) The cause of the malfunction: incorrect input of data on the motor nameplate: the load being dragged by the motor is too heavy: mechanical jamming. The motor is locked. (3) Method to solve the problem: Check whether the motor nameplate data in the Set and Motor Control menus is correctly entered; Whether the overcurrent protection threshold is appropriate: check the selection of Inverter and whether it is suitable for the motor and load, and check whether the motor is blocked; Check if the machine is stuck. 2. Motor short circuit fault ※ Fault code: SCF (1) Fault name: The Inverter can display SCF1 motor short circuit based on the degree of short circuit; SCF2 has impedance short circuit; SCF3 is short circuited to ground. (2) Reason for failure: SCF1: When a short circuit occurs between the output phases of the Inverter or between the output and ground, hardware is used to detect the fault and respond quickly (several microseconds). The current threshold that triggers the fault is between 3-4 times the rated current of the Inverter. (3) SCF2: Due to impedance short circuit between the output phases or the output phase to ground of the Inverter, software is used to detect this fault for a few milliseconds. Possible reasons for the grounding of the Inverter output include: short circuit of the motor itself; Long motor cables, if multiple motors are connected in parallel and the cable length between the motor and the Inverter exceeds 80 meters, without using a motor reactor or a sine wave filter on the output side of the Inverter to reduce ground leakage current. (4) The cause of the fault: insulation problem of the cable from the motor or Inverter to the motor; Current transformer fault; Power board including | GBT power part failure; Control board malfunction. SCF3: When the motor starts or runs, it detects a short circuit between the output of the Inverter and the ground, and the Inverter detects a large leakage current between the output and the ground. (5) Solution to the fault: Check the cable insulation between the Inverter and the motor; Check the insulation of the motor; If the cable between the motor and the Inverter is too long, a motor reactor or a sine wave filter on the output side of the Inverter should be used to reduce ground leakage current; Reduce the switching frequency of the Inverter and check if the GBT power section is normal. 3. Braking overspeed fault ※ Fault code: OBF (1) Fault name: Braking overspeed. (2) The cause of the fault: Due to excessive braking or large load inertia, the internal DC bus voltage of the Inverter suddenly increases. (3) The method to solve the problem is to increase the deceleration time of the Inverter as much as possible; The deceleration time adaptation (brA) function can be activated without using a braking resistor; If necessary, additional braking resistors should be added and the resistance and power of the braking resistor should be correctly calculated according to actual requirements. 4. Inverter overheat fault ※ Fault code: OHF (1) Fault Name: Inverter Overheating Fault (2) Reason for malfunction: Check the motor load; Check if the cooling fan of the Inverter is malfunctioning. The reason is that the temperature of the power part of the Inverter is too high due to the heavy load of the motor or poor heat dissipation of the Inverter. (3) Method to solve the problem: Check if the ventilation of the Inverter is good and if there is any dirt blocking. Check if the ambient temperature of the Inverter is too high. Take appropriate measures to reduce the ambient temperature to ensure the cleanliness of the operating environment of the Inverter. When the Inverter overheats, wait for the temperature of the Inverter to drop before starting the Inverter. 5. Motor overload fault ※ Fault code: OLF (1) Fault name: Motor overload fault. (2) The cause of the fault: Due to excessive current in the motor, the thermal protection of the motor inside the Inverter was triggered. (3) Solution to the fault: Check the load condition of the motor; Check the motor thermal protection parameter settings of the Inverter; Wait for the motor to cool down before starting it.   If you are looking for a reliable and efficient variable frequency drive, come to Rockss Automation to take a look and perhaps find a satisfactory product.   6. Motor phase failure ※ Fault code: OPF (1) Fault name: Motor phase loss fault. (2) Reason for the malfunction: The Inverter is not connected to the motor; The motor power does not match the Inverter power, and the motor is too small; The motor runs at no load, and the running current of the motor is unstable and discontinuous, resulting in the Inverter not being able to detect the motor current. (3) Solution to the fault: Check the connection between the Inverter and the motor; If conducting small motor testing, the motor phase loss protection function of the Inverter should be turned off, and the output phase loss setting (○ PL)=not set (nO); Check if the motor rated voltage (UnS), motor rated current (ncr), and IR stator voltage drop compensation (UF) parameters are set correctly, and perform self tuning (tUn) operation. 7. Input overvoltage fault ※ Fault code: OSF. (1) Fault name: Inverter input overvoltage fault. (2) The cause of the fault: The input main power supply voltage of the Inverter is too high, and the instantaneous fluctuation of the main power supply voltage is too large. (3) Solution to the fault: Check the main power supply voltage, and the voltage fluctuation range should not exceed the allowable range of the Inverter. 8.Communication failure of Inverter  ※ Fault code: SLF. (1) Fault name: Communication failure of Inverter. (2) The cause of the malfunction is a communication interruption on the Inverter communication bus. (3) Solution to the problem: Check if the communication connection is normal; Check communication timeout settings; Check the communication program. 9. Inverter undervoltage fault ※ Fault code: USF. (1) Fault name: Inverter undervoltage fault. (2) Reason for malfunction: The input main power supply voltage of the Inverter is too low. The instantaneous fluctuation of the main power supply voltage is too large. (3) Solution to the fault: Check the main power supply voltage, and the voltage fluctuation range should not exceed the allowable range of the Inverter; Check if the Under Voltage Management (USb) parameter settings are appropriate. 10. Inverter input phase failure ※ Fault code: PHF (1) Fault name: Inverter input phase loss fault. (2) The cause of the fault: the inverter power supply is out of phase or incorrect; The Inverter is powered by a DC bus (3) Solution to the fault: Check the power supply connection of the Inverter; Check the power supply voltage and phase sequence of the Inverter; Check if the incoming fuse is blown; If the Inverter uses DC bus power supply, input phase loss (IPL)=N ○ should be set to shield the input phase loss protection. 11. Short circuit fault of Inverter braking unit ※ Fault code: BUF (1) Fault name: Short circuit fault of braking unit. (2) The cause of the fault: the braking resistor of the Inverter is burnt out, causing a short circuit in the braking unit; Short circuit of braking unit output; The brake unit is not connected to certain models of Inverter. 12. Fault in the pre charging circuit of the Inverter ※ Fault code: CrF (1) Fault name: Inverter pre charging circuit fault. (2) The cause of the fault: The relay or pre charging resistor in the internal charging circuit of the Inverter is damaged. (3) The method to solve the problem: The Inverter should be powered off first and then powered on later. If the problem cannot be eliminated, the Inverter must be repaired. 13. Motor overspeed fault ※ Fault code: SOF (1) Fault name: Motor overspeed fault (2) The cause of the malfunction is unstable operation of the motor; The inertia of the load dragged by the electric motor is too large. (3) Method to solve the problem: Check the parameter settings related to the motor nameplate data, inverter gain, and stability in the Inverter parameters; If necessary, the braking resistance can be increased. 14. Motor self-tuning fault ※ Fault code: TNF (1) Fault name: Motor self tuning fault. (2) The cause of the malfunction: Due to the use of a special motor or the power of the motor not matching the Inverter, or the motor not being connected properly, the Inverter failed to complete its self tuning during the motor self tuning. (3) Solution to the fault: Check the connection between the Inverter and the motor; Check and confirm that the Inverter and motor are compatible with each other. 15. Speed feedback loss fault ※ Fault code: SPF (1) Fault name: Speed feedback loss fault. (2) Reason for the malfunction: During the operation of the Inverter, the encoder feedback signal was lost. (3) Solution to the fault: Check the connection between the Inverter and the encoder; Check the encoder. 16. Encoder malfunction ※ Fault code: EnF (1) Fault name: Encoder fault. (2) The cause of the malfunction: The encoder has malfunctioned. (3) Solution to the fault: Check the parameter settings of the number of pulses (PG |) and encoder type (EnS) related to the encoder in the Inverter; Check the mechanical and electrical connections of the encoder. 17. The Chinese panel of the Inverter cannot be connected or the screen is black (1) The cause of the fault: there is a fault in the Chinese panel of the Inverter, the internal power supply of the Inverter is faulty, and the Chinese panel of the Inverter is not connected properly. (2) Method to solve the problem: Check the connection between the panel and the Inverter, and check the 24 V power supply of the Inverter; Replace the Chinese panel. 18. Inverter display nLP ※ Display code: nLP (1) Code name: The Inverter has no main power supply. (2) The cause of the malfunction: The Inverter only has control power supply, and the main power supply is not supplied or the fuse on the input side of the Inverter is blown. (3) Solution to the fault: Check the incoming power supply of the Inverter; Check the fuse, the power of the Inverter is relatively low, check the connection of the short connectors of PO and PA+, and whether the bolts are tightened. If DC reactance is used, ensure that the DC reactance is connected to PO and PA+. 19. Inverter display PrA ※ Display code: PrA. (1) Code name: The power off function of the Inverter is effective, and the Inverter is locked. (2) The reason for the malfunction: Some Inverter have added safety application functions, and the PWR control terminal of the Inverter is not powered on. (3) Solution to the fault: Check the PWR control terminal of the Inverter. The variable frequency drives provided by Rockss Automation are designed with ease of use in mind and can be highly customized and adjusted to meet your specific needs. It is also equipped with advanced safety features to protect personnel and equipment. Whether you are in the manufacturing industry, HVAC industry, or any other industry that requires high-quality motor control, I believe Rockss Automation can provide the best solution. Please contact us immediately for the following order.