Omron CJ1W-ETN11 Operation Manual page 214

Troubleshooting with Indicators
RUN ERC ERH
Lit --- Flashing The IP address is set incorrectly on the
Probably cause
rotary switches on the back of the Unit. (CJ
Series only)
The node number set on the rotary switch
on the front of the Unit does not agree with
the host ID in the IP address. This probably
can occur when the address conversion
method is set for automatic address gener-
ation. (CJ Series only)
Correction
Correct the IP address. Do not set any of
the following IP addresses.
• Host IDs that are all 0 or all 1.
• Network IDs that are all 0 or all 1.
• Subnetwork IDs that are all 1.
• Addresses beginning with 127 (7F Hex).
Make sure that the node number and the
last byte of the IP address are the same
and set other host IDs to 0.
Change the address conversion method.
Section 10-1
193