Omron SYSMAC CJ Operation Manual page 364

Troubleshooting Errors
352
Problem
When this error occurs, the WDOG goes automatically off and all current motion is
stopped. If necessary, a user can take additional actions in BASIC programs when this
error happen. The occurrence of this error can be checked for by reading bit 2 of the
value returned by the PLC_STATUS(0) BASIC command (see section 4-2-182 for
more details on PLC_STATUS BASIC command).
Solution
Section 6-3