Omron CJ1W-DRM21 Slave Errors, CPU Unit Fatal Error Output OFF Error, Replace the CPU Unit

Troubleshooting with the DeviceNet Unit Indicators Section 9-1

CPU Unit Fatal Error

Output OFF Error

Slave Errors

Remote I/O Communications Error

•Returns an error response (0302 Hex) to commands requiring a re- sponse.

•Discards other frames and stores an error record (010B Hex) in the er- ror log.

Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)

There is no status notification because communications with the CPU Unit are disabled.

CIO Area Flags Allocated to DeviceNet Unit

There is no status notification because communications with the CPU Unit are disabled.

Correction

Replace the CPU Unit.

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

DeviceNet Unit Response

Output data is set to 0. (With the master, these are output bits. With the slave, these are input bits to the other master.)

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

Likely Cause

The Output OFF Bit (A50015) was turned ON in the CPU Unit.

DeviceNet Unit Response

Output data is set to 0. (With the master, these are output bits. With the slave, these are input bits to the other master.)

7-segment	MS indicator	NS indicator	Error log (Hex)
L9	---	Red (flashing)	0345

Likely Cause

A timeout occurred during remote I/O communications using the slave func- tion.

DeviceNet Unit Response

Records the error in the error log.

If slave has outputs, the status of those outputs is determined by the hold/ clear outputs setting for communications errors.

CIO Area Flags Allocated to DeviceNet Unit

Bits 00 and 03 of n+10 (the Unit Error Flag and Slave Error Flag) and bits 02 and 03 of n+14 (the Remote I/O Communications Error Flag for OUT1/IN1 and Remote I/O Communications Error Flag for OUT2/IN2) will be ON.

Correction

Check the following:

•Matching master and slave baud rates

•Proper cable lengths (trunk and branch lines)

•Broken or loose cables

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