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Troubleshooting with the DeviceNet Unit Indicators Section 9-1
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verifi-
cation error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Verification Error:
Unsupported Connection
Likely Cause
The device does not support the I/O service specified in the scan list. (Occurs
with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verifi-
cation error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Remote I/O
Communications Error
Likely Cause
A timeout occurred during remote I/O communications using the master func-
tion. (The response from the slave timed out 6 consecutive times.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the error,
but remote I/O communications will stop if the master is set to stop communi-
cations.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 06 (Communications Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 02 of n+12 (Remote I/O Communications Error Flag) and bits 00 and 01 of
n+10 (Unit Error Flag and Master Function Error Flag) will be ON.
Correction
Check the following:
7-segment MS indicator NS indicator Error log (Hex)
d6 --- Red (flashing) 0344
7-segment MS indicator NS indicator Error log (Hex)
d9 --- Red (flashing) 0345