Omron CJ1W-DRM21 Operation Manual page 243

Status of C200H Master Replacement
Master Status 1
*_CMstrSta*_CMstrSta
*_CMstrErr (Master Error) and
*_CMstrSendErr (Send Error) are TRUE.
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Status of device variables
for CJ-series Units
*_NetPwrErr (Network Power Error) and
*_UnitErr (Unit Error) are TRUE.
9 Troubleshooting and Maintenance
Correction
Check the network power supply and
the wiring of the network cables.
9
9-13