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Troubleshooting with the DeviceNet Unit Indicators Section 9-1
DeviceNet Unit Response
Stops operation.
Correction
Set the communications speed correctly and restart the DeviceNet Units.
CPU Unit Faulty (H6)
DeviceNet Unit Response
Records the error in the error log. (The time information is set to all zeroes.)
Stops operation.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
I/O Table Not Registered
Likely Cause
The CPU Unit’s I/O table is not registered.
DeviceNet Unit Response
Records the error in the error log.
Stops operation.
Correction
Create the I/O table.
CPU Unit Memory Faulty
Likely Cause
A parity error occurred while reading the routing table.
DeviceNet Unit Response
Records the error in the error log and continues processing
The routing table is treated as missing.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 12 of n+10 (the Unit Error Flag and Routing Table Error Flag) will
be ON.
Correction
Register the routing table in the CPU Unit again and restart the CPU Unit.
Replace the CPU Unit if the error recurs.
CPU Unit Faulty (Hb)
Likely Cause
A timeout occurred while reading the routing table.
7-segment MS indicator NS indicator Error log (Hex)
H6 Red (flashing) OFF 000F
7-segment MS indicator NS indicator Error log (Hex)
H7 Red (flashing) OFF 0006
7-segment MS indicator NS indicator Error log (Hex)
HA Red (flashing) --- 0012
7-segment MS indicator NS indicator Error log (Hex)
Hb Red (flashing) --- 0011