Omron SYSMAC CVM1 Series Operation Manual page 87

Troubleshooting with Status Area Functions
Flag Allocation in Multi-
level Mode
Word
(N = Unit number)
1500 + 25 × N
Link
#1
1500 + 25 × N + 1
1500 + 25 × N + 2
Link
#0
1500 + 25 × N + 3
Troubleshooting with
Status Flags
Flag status
PLC Run Flag OFF The PC Link Unit's switch set-
tings are incorrect.
An error occurred in the PLC
in which the affected Unit is
mounted.
The PLC is stopped.
PC Link Error Flag The PC Link Unit's switch set-
ON tings are incorrect.
The cable is disconnected or
damaged.
An error occurred in the
affected Unit.
A communications error
occurred due to noise.
72
PC Link Error Flags
15 14 13 12 11
15 14 13 12 11
7 6 5 4 3
15 14 13 12 11
7 6 5 4 3
Probable cause
10 09 08 07
10 9 8 15
2 1 0 7
10 9 8 15
2 1 0 7
Check settings such as the level/link number, node address, and
number of LR bits.
Confirm that the PC Link Unit's node address is not set on another
node in the PC Link.
Confirm that all of the nodes in the PC Link have the same level/
link number setting.
Refer to the PLC's Operating Manual to clear the error.
If the error recurs, replace the PLC.
Switch the PLC to RUN mode.
Check settings such as the level/link number, node address, and
number of LR bits.
Confirm that the PC Link Unit's node address is not set on another
node in the PC Link.
Check the connections and the cable itself.
Check the affected Unit's LED Indicators, identify the error using
the table in 5-1 Troubleshooting with LED Indicators, and correct
the error.
Check the length of the branch lines and main line.
Check the Terminating Resistance switch settings.
Separate the communications cables from power/high voltage
lines.
Section 5-2
PLC Run Flags
06 05 04 03 02
14 13 12 11 10
6 5 4 3 2
14 13 12 11 10
6 5 4 3 2
Remedy
01 00
9 8
1 0
9 8
1 0