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Troubleshooting
General Problems
5-13
Classic PLC-5
processors only
☞
Indicator
Color
Description
Probable Cause
Recommended Action
PROC
REM I/O
COMM
all red
(steady)
internal diagnostics have
failed
Power down, reseat processor and power up.
Then, clear memory and reload your program.
Replace EEPROM with new program. Then, if
necessary, replace
the processor.
FORCE
amber
(steady)
forces enabled
normal operation
none
amber
(blinking)
forces present, but not
enabled
normal operation
none
off
no forces present
normal operation
none
BATT
off
battery is good
normal operation
none
red
(steady)
battery low
Replace battery within 1-2 days (typical).
ADPT
green
(steady)
processor is in adapter
mode
normal operation
none
off
processor is in scanner
mode
normal operation
none
COMM
BATT
FAULT
REM I/O
PROC
ACTIVE
RUN
ADPT
FORCE
REM
R
U
N
P
R
O
G