Error Led On (Cpu Error) - Mitsubishi FX1S-10MR-ES/UL Hardware Manual

FX1S Series Programmable Controllers
7.2

ERROR LED ON (CPU ERROR)

Table 7.2: Error LED Checks
Fault
POWER
RUN
ERROR
ERROR
LED ON
Remedy
Power OFF
Disconnect
earth/ground
A
terminal
Power ON
Remedy
Possible program/scan time error.
Check D8012 for program scan time,
B
(units 0.2 ms must be less than 0.2
sec, i.e. - data value <2000).
Remedy
Reset PLC.
Turn power
Possible
OFF, then
results
ON and
trigger RUN
input.
LED is lit
Possible
results
LED is
flashing
Has the memory cassette been
LED OFF installed or removed while the unit
was still powered On?
LED is lit
A
B
Check for programming error. Ensure the earth/
ground cable is correctly rewired.
PLC M/C PLC
9 9
Possible results
D8012 > D8000
Diagnostics 7
M/C PLC M/C
8
7-2