Rockwell Automation 1785-LTx,D178510.3 QUICK START CLASSIC PLC-5 PROG - Manual (Page 16)

Chapter
4
Publication 1785Ć10.3 - October 1996
Troubleshoot the Processor
System
Use the PLCĆ5 Processor
Status Indicators
(page 4-1)
1
BATT
PROC
FORCE
COMM
Indicator Color Description Probable Cause Recommended Action
PROC green
(steady)
processor in RUN mode and
fully operational
normal operation no action required
green
(blinking)
Processor memory being
transferred to EEPROM
normal operation no action required
red
(blinking)
major fault runĆtime error Check major fault bit in status file (S:11)
for error definition. Clear fault bit, correct
problem, and return to RUN mode.
red
(steady)
major fault • user RAM has
checksum error
• memory module
error
• Clear memory and reload program.
• Check backplane switch settings
and/or insert correct memory module.
off processor in program load or
TEST mode or is not receiving
power
Check power supply and connections.
PROC
REM I/O
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 no action required
amber
(blinking)
forces present, but not
enabled
normal operation no action required
off no forces present normal operation no action required
BATT red
(steady)
battery low Replace battery within 1Ć2 days (typical).
off battery is good normal operation no action required
ADPT
(continues)
green
(steady)
processor is in adapter mode normal operation no action required
COMM BATT
REM I/O
ADPT
PROC
FORCE
FAULT
ACTIVE
RUN
REM
R
U
N
P
R
O
G
Use the PLCĆ5 Processor
Status Indicators