Omron CPM2C Operation Manual page 143

5-5 Troubleshooting Flowcharts
Main Check
Use the following flowcharts to troubleshoot errors that occur during operation.
Error
PWR indicator lit?
Yes
RUN indicator lit?
Yes
ERR/ALM indicator
flashing?
Not lit
Is I/O sequence
normal?
Yes
Operating
environment normal?
Yes
Replace the CPU
Unit.
No
Check power supply. (See page 129.)
No
Operation stopped. Check for fatal errors.
(See page 130.)
Flashing
Check for non-fatal errors. (See page 131.)
No
Check I/O. (See page 132.)
No
Check operating environment. (See page 134.)
Section 5-5