Omron CJ1W-DRM21, CS1W-DRM21 operation manual Software Switch Setting Errors, CPU Unit Status Error

Troubleshooting with the DeviceNet Unit Indicators Section 9-1

•Matching master and slave baud rates

•Proper cable lengths (trunk and branch lines)

•Broken or loose cables

•Installation of terminators at both ends of the trunk line

•Excessive noise

Software Switch Setting Errors

CPU Unit Status Error

7-segment	MS indicator	NS indicator	Error log (Hex)
C0	---	---	---

Likely Cause

The software settings operation couldn’t be performed because the CPU Unit wasn’t in PROGRAM mode.

DeviceNet Unit Response

The only response is the error code displayed on the 7-segment display. The error display will be cleared the next time that a settings operation is com- pleted normally.

Correction

Switch the CPU Unit to PROGRAM mode and try the operation again.

Unit Status Error

7-segment	MS indicator	NS indicator	Error log (Hex)
C2	---	---	---

Likely Cause

The setting operation failed because the Unit could not perform the requested process in its current status. The most common causes of Unit status errors during settings operations are listed below:

•The master was stopped and a software switch operation relating to the master function was performed. (This does not include the master enable operation.)

•The scan list was enabled and a software switch operation was performed that can only be performed while the scan list is disabled. (Scan list enable and fixed allocation setting operations)

•The scan list was disabled and a software switch operation was per- formed that can only be performed while the scan list is enabled. (Clear scan list and Backup Unit settings file operations)

•The slave was stopped and a software switch operation relating to the slave function was performed. (This does not include the slave enable operation.)

DeviceNet Unit Response

The only response is the error code displayed on the 7-segment display. The error display will be cleared the next time that a settings operation is com- pleted normally.

Correction

Change the Unit’s status to allow the operation and try the operation again.

Structure Error

7-segment	MS indicator	NS indicator	Error log (Hex)
C4	---	---	---

207