Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 145)

Publication 1747-UM011G-EN-P - June 2008
Troubleshooting 145
• Power status indicator
is on
• All other status
indicators are off
• Status of SLC 5/02
Comm status indicator
does not matter
Processor not in
run mode
Either improper
mode selected or
user program logic
error.
1. Verify selected processor mode.
2. If in program or test mode, try to enter run mode.
3. If in suspend mode, check user program logic for suspend
instructions.
Line power out of
operating range.
1. Check proper 120/240V power supply jumper selection and
incoming power connections.
2. Monitor for proper line voltage at the incoming power
connections.
Improper seating of
power supply
and/or processor in
the chassis.
1. Remove power and inspect the power supply and processor
chassis connections.
2. Re-install the devices and re-apply power.
IMPORTANT
The processor only operates in slot 0 of the first chassis.
Defective
processor, power
supply, or chassis.
1. Attempt to put processor in run mode in existing chassis.
2. Place the processor in another chassis. Apply power,
reconfigure, and attempt to put processor in run mode. If
unsuccessful, replace the processor.
3. Place the power supply in another chassis and test. If
unsuccessful, replace the power supply. If successful,
replace the original chassis.
• Power status indicator
is on
• Run status indicator is
on
• All other status
indicators are off
• Status of SLC 5/02
Comm status indicator
does not matter
System inoperable,
no major CPU
faults detected
User program logic
error.
1. Monitor logic in Run mode and verify desired I/O status.
2. Check for minor CPU faults.
Defective I/O
devices or I/O
wiring.
Test inputs and outputs according to I/O troubleshooting
procedures starting on page 163.
SLC 5/01 and SLC 5/02 Processor Errors
If the status indicators
indicate The following
error exists Probable Cause Recommended Action