Omron SYSMAC CVM1 Series Operation Manual page 84

Troubleshooting with LED Indicators
Troubleshooting with
LED Indicators
Indicator status
RUN ERC ERH LINK0 THIS OTHER
Not lit Not lit Not lit Not lit Not lit Not lit
Not lit Not lit Lit Lit
Not lit Not lit Lit Not lit ---
Use the following table to identify and correct errors based on the LED Indica-
tor status.
Probable cause
The PC Link Unit is faulty.
Power is not being supplied prop-
erly to the CPU Unit.
The PC Link Unit is not mounted
securely.
The PC Link Unit is mounted in a
slot that does not support it.
Lit Not lit Local node is the polling node
(node 0):
The affected Unit is not in the
CPU Unit's I/O Table or is regis-
tered incorrectly.
Local node is the polling node
(node 0):
The CPU Unit is faulty or an error
occurred in the CPU Unit so the
Unit is not being serviced.
Local node is the polling node
(node 0):
The CPU Bus Unit unit number is
not within the allowed range.
Local node is the polling node
(node 0):
The same unit number is set on
another CPU Bus Unit in the PLC.
Not lit Local node is a polled node:
The affected Unit is not in the
CPU Unit's I/O Table or is regis-
tered incorrectly.
Local node is a polled node:
The CPU Unit is faulty.or an error
occurred in the CPU Unit so the
Unit is not being serviced.
Local node is a polled node:
The CPU Bus Unit unit number is
not within the allowed range.
Local node is a polled node:
The same unit number is set on
another CPU Bus Unit in the PLC.
Section 5-1
Remedy
Mount the Unit in another CPU Rack
and replace the Unit if the Error
recurs.
Check the power supply voltage and
supply the proper power.
Secure the Unit in the Rack.
Mount the Unit in a slot that supports
it.
Create a correct I/O table.
Eliminate the CPU Unit's error.
Replace the CPU Unit if the error
recurs.
Set the PC Link Unit's unit number
(as a CPU Bus Unit) between 0 and
15.
Set the unit numbers again to elimi-
nate the duplication.
Create a correct I/O table.
Eliminate the CPU Unit's error.
Replace the CPU Unit if the error
recurs.
Set the PC Link Unit's unit number
(as a CPU Bus Unit) between 0 and
15.
Set the unit numbers again to elimi-
nate the duplication.
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