Omron CJ1W-PNT21 Operation Manual page 138

Troubleshooting the Network
IO Controller Status 1
124
LED Indicators
Local Configuration Storage Error
Local Configuration Load Error
File Read Error
Error Log Storage Error
The IO Controller Status 1word displays the state of the Unit. It shows if the IO
Controller can go on the network and communicate with the current
configuration with the IO devices.
/i
LED Indicators
Controller is ONLINE
Controller is in Data Exchange
Description/Correction
After the download of a new configuration
or a restore from the Compact Flash card
in the PLC CPU the IO Controller will store
the configuration in its memory. If it does
not succeed then this flag is ON.
Try to download the configuration again. If
the problem persists the replace the IO
Controller.
During startup of the IO Controller loads
the configuration from memory. If it does
not succeed then this flag is ON.
Try to download the configuration again. If
the problem persists the replace the IO
Controller.
If the IO Controller restores a configuration
from Compact Flash card in the PLC CPU
and it can not access the configuration file
on the Compact Flash card then this flag is
ON.
If a new error needs to be written to the
Error Log and the IO Controller does not
succeed in storing this error in the Error
Log then this flag is ON.
Description/Correction
Normally the IO Controller is always
Online. If the IO Controller has gone
Offline then a severe error has occurred.
Check the Unit Status and the Error
History to see the cause.
Eventually replace the Unit.
The IO Controller is in Data Exchange
when it can reach at least one of the
configured IO devices. This shows that the
network connection to the IO Devices
works. If some of the IO Devices can not
be reached it is a network issue and not an
issue of the IO controller.
If the IO Controller is out of Data
Exchange it means that their is something
wrong with the network connection from
the IO Controller to the IO Devices.
Section 8-3