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The PLC maintenance input/output module is abnormal, and the expansion module is abnormal:
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The PLC maintenance input/output module is abnormal, and the expansion module is abnormal:

The PLC maintenance input/output module is abnormal, and the expansion module is abnormal:

April 18, 2023

When such a reminder occurs, check the insertion status and cable connection status of the I/O module and expansion module connectors first, and then replace the module after determining the faulty module.

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