FX2NC Series Programmable Controllers
Diagnostics 7.
7-3
7.2.3
ERROR LED ON (CPU ERROR)
Fault
ERROR
LED ON
Remedy
Reset PC.
Power
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
BATT
ERROR
A
A
B
P C
M /C
P C
M /C
P C
M /C
9
9
8
B
Summary of Contents for MELSEC FX2NC-16MT-D/UL
Page 1: ...D UL HARDWARE MANUAL FX2NC D UL SERIES PROGRAMMABLE CONTROLLERS ...
Page 12: ...FX2NC Series Programmable Controllers Introduction 1 ...
Page 40: ...FX2NC Series Programmable Controllers Introduction 1 1 28 MEMO ...
Page 42: ...FX2NC Series Programmable Controllers Terminal layouts 2 ...
Page 48: ...FX2NC Series Programmable Controllers Installation notes 3 ...
Page 70: ...FX2NC Series Programmable Controllers Power supply 4 ...
Page 78: ...FX2NC Series Programmable Controllers Inputs 5 ...
Page 88: ...FX2NC Series Programmable Controllers Inputs 5 5 10 MEMO ...
Page 90: ...FX2NC Series Programmable Controllers Outputs 6 ...
Page 108: ...FX2NC Series Programmable Controllers Outputs 6 6 18 MEMO ...
Page 110: ...FX2NC Series Programmable Controllers Diagnostics 7 ...
Page 126: ...FX2NC Series Programmable Controllers Diagnostics 7 7 16 MEMO ...
Page 128: ...FX2NC Series Programmable Controllers Diagnostics 8 ...
Page 130: ...FX2NC Series Programmable Controllers Discontinued model 8 8 2 MEMO ...
Page 131: ......