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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
38. Error Check Method and Error Code List
When an error occurs while the program is being executed, troubleshoot the cause of the error in accordance with this
chapter.
For error details, refer to the Data Communication Edition and the Hardware Edition of the PLC main unit.
38.1 States and Colors of LEDs PLC Operation Status
When an error has occurred, the PLC state can be checked using the LED status lights on the PLC.
POWER
(Green)
RUN
(Green)
ERROR
(Red)
ALM
(Red)
FX3U PLC
FX
3UC(D, DS, DSS) PLC
POWER
(Green)
RUN
(Green)
BATT
(Red)
ERROR
(Red)
FX3UC-32MT-LT(-2) PLC
POWER
(Green)
RUN
(Green)
BATT
(Red)
ERROR
(Red)
L. RUN
(Green)
L. ERR
(Red)
FX3G PLC
POWER
(Green)
RUN
(Green)
BATT
(Red)
ERROR
(Red)
POWER
(Green)
RUN
(Green)
ERROR
(Red)
ALM
(Red)
FX3GC PLC
POWER
(Green)
RUN
(Green)
ERROR
(Red)
FX3S PLC