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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
38 Error Check Method and Error Code List
38.1 States and Colors of LEDs PLC Operation Status
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
38.1.7 L ERR LED [FX3UC-32MT-LT(-2)]
*1. FX3UC-32MT-LT only.
→ For details, refer to the Hardware Edition of the PLC main unit.
Mode LED status PLC status Action
ONLINE
Lit
• Unit disconnected
• Outside-control-range station
error
• RD station number setting
error
• Securely connect the built-in master to remote I/O units and
remote device stations on the network.
• Make sure that the connected remote I/O units and remote device
stations are consistent with the detailed information on remote
stations.
Flickering All stations are abnormal
• Securely connect the built-in master to remote I/O units and
remote device stations on the network.
• Make sure that the connected remote I/O units and remote device
stations are consistent with the detailed information on remote
stations.
Unlit
Data link is being normally
executed
⎯
CONFIG
*1
Lit
Used station numbers mismatch.
(Remote stations are checked
while the remote station
information is edited.)
• Securely connect the built-in master to remote I/O units and
remote device stations on the network.
• Make sure that the connected remote I/O units and remote device
stations are consistent with the detailed information on remote
stations.
• Verify that remote device station numbers are within the allowable
range.
Flickering
All stations are abnormal.
(Remote stations are checked
while the remote station
information is edited.)
Unlit
Data link is being normally
executed
⎯
TEST
Lit
The self-loopback test is
abnormally finished.
• Make sure that the power is correctly supplied to the PLC.
• If the L RUN LED is on even after the above check, consult a
Mitsubishi Electric representative.
Unlit
The self-loopback test is normally
finished.
(This LED is off while the self-
loopback test is executing.)
⎯