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Troubleshooting with the DeviceNet Unit Indicators Section 9-1
Correction
Set the slaves’ node addresses again.
Structure Error:
I/O Area Range Exceeded
Likely Cause
The slave’s I/O area isn’t within the allowed range. (Occurs with the scan list
disabled.)
DeviceNet Unit Response
Records the error in the error log. The master will periodically attempt to
reconnect with the slave with the structure 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.
Correction
Set the slaves’ node addresses again or use user-set allocations.
Structure Error:
Unsupported Slave
Likely Cause
The size of the slave’s input and/or output area exceeded 200 bytes. (Occurs
with the scan list disabled.)
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 (Error Flag) and bit 04 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 01 of n+12 (Structure Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Use slaves with input and output areas of 200 bytes max.
Verification Error:
Non-existent Slave
Likely Cause
A slave registered in the scan list doesn’t exist or the local node’s (master’s)
node address is registered in the scan list. (Occurs with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
• If a slave is involved, the master will periodically attempt to reconnect.
• If the master is involved, it will not send an OPEN frame to itself.
7-segment MS indicator NS indicator Error log (Hex)
d1 --- Red (flashing) 0343
7-segment MS indicator NS indicator Error log (Hex)
d2 --- Red (flashing) 0343
7-segment MS indicator NS indicator Error log (Hex)
d5 --- Red (flashing) 0344