Omron Sysmac CS1 Operation Manual page 154

Troubleshooting Tables Section 9-3
Counter Unit will be stopped. For CPU Unit monitor errors or bus errors, howev-
er, I/O refreshing from the CPU Unit will be stopped, so the status of the RUN/
STOP Command Bit will not change. Error processing in this situation must be
performed in the Customizable Counter Unit. If RUN/STOP Command Bit has
been disabled, (i,e., bits 00 to 07 of DM word m contain anything other than 0
Hex), a non-fatal error will occur in the Customizable Counter Unit.
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