Allen-Bradley PLC

38 – I/O module fault

I/O module configuration fault

Details

An I/O module is not responding or is incorrectly configured.

Error typefault
MeaningI/O configuration fault
Typical causesModule missing incorrect slot configuration module defective
SolutionsVerify module presence check slot configuration in hardware config test module
Severitymedium

Catalog references

Vendor Information

Allen-BradleyFault Code 38

Utilities

Troubleshooting Steps

Troubleshooting steps

Verify module presence check slot configuration in hardware config test module

Other codes

Other Allen-Bradley PLC Codes

16 – Processor fault

Processor fault detected

→

77 – Communication fault

Communication fault with remote I/O

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20 – Remote I/O fault

Remote I/O communication fault

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21 – Communication timeout

Communication timeout with remote device

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22 – Network fault

Network communication fault

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FAQ

Common questions

How do I check module status?

Use RSLogix diagnostic tools or check module status LEDs on the module.