Allen-Bradley PLC

16 – Processor fault

Processor fault detected

Details

The processor has detected an internal fault condition.

Error typefault
MeaningProcessor fault
Typical causesPower supply issue memory corruption watchdog timeout
SolutionsCheck power supply quality restart processor check for memory errors verify firmware version
Severitycritical

Catalog references

Vendor Information

Allen-BradleyFault Code 16

Utilities

Troubleshooting Steps

Troubleshooting steps

Check power supply quality restart processor check for memory errors verify firmware version

Other codes

Other Allen-Bradley PLC Codes

38 – I/O module fault

I/O module configuration fault

→

77 – Communication fault

Communication fault with remote I/O

→

20 – Remote I/O fault

Remote I/O communication fault

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21 – Communication timeout

Communication timeout with remote device

→

22 – Network fault

Network communication fault

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FAQ

Common questions

Can I clear the fault?

Usually requires power cycle. Check diagnostic files first.