Error Led On (Cpu Error) - Mitsubishi Electric MELSEC FX2NC-16MT-D/UL Hardware Manual

FX2NC Series Programmable Controllers
7.2.3

ERROR LED ON (CPU ERROR)

Fault
POWER
RUN
ERROR
BATT
LED ON
ERROR
Remedy
Power OFF
Discon-
nect earth/
A
ground ter-
minal
Power ON
Remedy
Possible program/scan time error.
Check D8012 for program scan time,
B
(units 0.2 msec must be less than 0.2
sec, i.e data value <2000).
Remedy
Reset PC.
Power
Possible
OFF,ON
results
and trigger
RUN in-
put.
LED is lit
Possible
results
LED is flash-
ing
Has the memory cassette been
LED OFF installed or removed while the units
has still been powered?
LED is lit
A
B
Check for programming error. Ensure the earth/
ground cable is correctly rewired.
P C M /C P C
Possible results
D8012 > D8000
Diagnostics 7.
M /C P C M /C
7-3