Omron CS1W-ETN21 - Manual (Page 234)

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Troubleshooting Procedures Section 8-4
8-4 Troubleshooting Procedures
The following procedures can be used to troubleshoot various problems in
system operation.
8-4-1 Startup Problems
RUN indicator lit?
Replace the Ethernet Unit.
Y
N
ERH indicator lit?
Y
N
ERC indicator lit?
N
Y
Power supplied
to CPU Unit?
Y
N
Ethernet Unit
loose on Rack?
N
Y
Do the RUN and ERH
indicators not light if another
CPU Unit is mounted
to the Rack?
N
Y
Is the same node
number used by another
Unit?
Y
N
Startup Problems occurred.
Make sure that sufficient
power is supplied to the
CPU Unit.
Make sure that Unit is firmly
mounted and tighten the
mounting screws firmly or
lock the sliders into place.
Replace the CPU Unit that
didn't work.
Create the I/O tables in
the CPU Unit.
Set the node numbers so that each one is used only once.
N
Y
N
Y
Y
N
Go to Network Connection Problems
ERH indicator not lit?
N
Y
N
Y
Set the unit numbers correctly.
Replace the Ethernet Unit.
Y
N
Is the node
address set between
01 and FE Hex?
Is the same unit
number used by another
CPU Bus Unit?
Has a CPU Unit error
occurred in the CPU Unit?
Restart the CPU Unit. If the error persists, replace the CPU
Unit.
Set the Unit Setup and routing tables
correctly.
ERH indicator not
flashing? Is the IP address correct?
Correct the IP address in the System Setup, and read out the
controller status using the READ CONTROLLER STATUS
command in FINS communications and correct any problems
indicated.
Make sure that the node number and the last byte of the IP address are the same and set
other host IDs to 0, or change the address conversion method to use and IP address table
or combined methods.
Set the node
address to
between 01 and
FE Hex.