Omron CJ1W-EIP21 Operation Manuals page 365

Event name Link OFF Error
Meaning The Ethernet link status turned OFF.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
The Ethernet cable is disconnected.
An Ethernet cable is disconnected or
loose.
The switching hub power supply is
turned OFF.
Baud rate mismatch.
Noise
Attached None
information
Precautions/ You can change the event level to the minor fault level. If you change the level to the minor fault level, the Recovery col-
Remarks umn above will be changed to "Automatic recovery."
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
Source details
Observation Recovery
Continues. Operation
Data type
---
Correction
Connect the Ethernet cable.
Connect the Ethernet cable securely.
If the cable is broken, replace it.
Turn ON the power supply to the
switching hub. Replace the switching
hub if it fails.
Correct the settings so that the same
baud rate is used as for the remote
communications nodes.
Implement noise countermeasures if
there is excessive noise.
13 Troubleshooting
Event code 84E2 0000 hex
CJ-series Unit Detection
timing
--- Log category
The EtherNet/IP Unit is offline. Communications are not
possible. Error responses are returned to all communica-
tions requests. Data refreshing with the CPU Unit contin-
ues.
Name
---
Prevention
Connect the Ethernet cable securely.
Check the cable to make sure that it is
not disconnected.
Do not turn OFF the power supply to
the switching hub.
Set the same baud rate as for the
remote communications nodes.
Implement noise countermeasures.
After link is
established
System
13
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