Omron CS1W-DRM21, CJ1W-DRM21 operation manual Master Errors

Troubleshooting with the DeviceNet Unit Indicators Section 9-1

Master Errors

Remote I/O Communications Stopped by a Communications Error

Structure Error:

I/O Area Duplication

remote I/O communications for a communications error, two errors can be displayed: The slave’s communications error and its most recent error.

7-segment	MS indicator	NS indicator	Error log (Hex)
A0	---	---	0346

Likely Cause

Pin 3 on the master’s DIP switch is set to stop communications in the event of a communications error and communications have been stopped due to a remote I/O communications error, network power supply error, or transmission timeout.

DeviceNet Unit Response

Remote I/O communications as a master will stop. Remote I/O communica- tions as a slave and message communications will continue.

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

Bit 14 (the Error Flag) will be ON as well as bit 05 or 06 (the Sending Error Flag or Communications Error Flag).

CIO Area Flags Allocated to DeviceNet Unit

Bit 00 of n+10 (Unit Error Flag) will be ON together with one of the following combinations:

•Bit 02 of n+12 (the Remote I/O Communications Error Flag) and bit 01 of n+10 (the Master Function Error Flag) ON.

•Bit 07 of n+10 (the Network Power Error Flag) ON.

•Bit 08 of n+10 (the Send Timeout Flag) ON.

Correction

Perform error processing according to the cause:

•Remote I/O communications error (See error d9.)

•Network power supply error (See error E0.)

•Transmission timeout error (See error E2.)

Correct the cause of the error and then restart remote I/O communications by toggling bit 02 of n (the Remote I/O Communications Start Switch.)

7-segment	MS indicator	NS indicator	Error log (Hex)
d0	---	Red (flashing)	0343

Likely Cause

The slave’s I/O areas overlap. (Occurred with the scan list disabled.) Errors will occur in the active slaves.

DeviceNet Unit Response

Records the error in the error log.

The master will periodically attempt to reconnect with the slave with the struc- ture error.

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

Bit 14 (the Error Flag) and bit 04 (the Structure Error Flag) will be ON.

CIO Area Flags Allocated to DeviceNet Unit

Bit 01 of n+12 (the Structure Error Flag) and bits 00 and 01 of n+10 (the Unit Error Flag and Master Function Error Flag) will be ON.

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