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FX1S Series Programmable Controllers Diagnostics 7
7-2
7.1.1 ERROR LED ON (CPU ERROR)
Fault
ERROR
LED ON
Remedy
Reset PLC.
Powe r
OFF,ON
and trigger
RUN in-
put.
Possible
results
LED OFF
Has the memory cassette been
installed or removed while the units
has still been powered?
LED is lit
Remedy
Possible
results
LED is lit
Power OFF
Discon-
nect earth/
ground ter-
minal
LED is flash-
ing
Check for programming error. Ensure the earth/
ground cable is correctly rewired.
Power ON
Remedy
Possible program/scan time error.
Check D8012 for program scan time,
(units 0.2 msec must be less than 0.2
sec, i.e data value <2000).
Possible results
D8012 > D8000
POWER
RUN
ERROR
A
A
B
PLC M/C PLC M/C PLC M/C
99 8
B