3Uc -32Mt-Lt); L Err. Led (Only Fx 3Uc -32Mt-Lt) - Mitsubishi FX3UC SERIES User Manual

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
12.5.5 L ERR. LED (Only FX
State of
Mode
LED
ONLINE
Flashing All stations are abnormal
CONFIG
Flashing
TEST
394
-32MT-LT)
3UC
State of PLC
Unit disconnection error
Outside-control-range station error
On
occurred
RD station number setting error
Data link is being
Off
executed normally
Use station number discrepancy
(when BFM#32(20h) to #95(5Fh)
On
is edited, the station numbers are
checked.)
All stations are abnormal
(when BFM#32(20h) to #95(5Fh)
is edited, the station numbers are
checked.)
Data link is being
Off
normally
Self-loop back Test was finished
On
abnormally
Self-loop back Test was finished
normally
Off
(Extinguished while the self-loop
back Test is being executed)
12 Test Operation, Adjustment, Maintenance and Troubleshooting
• Securely connect the built-in master, remote I/O
station and remote device station.
• Make sure that the connected remote I/O units are
consistent with the detailed information on remote
stations.
• Securely connect the built-in master, remote I/O
station and remote device station.
• Make sure that the connected remote I/O units are
consistent with the detailed information on remote
stations.
• Securely connect the built-in master, remote I/O
station and remote device station.
• Make sure that the connected remote I/O station and
remote device station are consistent with the detailed
information on remote stations.
• Confirm that the remote device station number is
within the allowable range.
executed
• 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 Distributor.
12.5 Troubleshooting with LEDs
Countermeasures
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