Maintenance and Troubleshooting
Chapter 5
510
Table 5.B
Troubleshooting Chart
Controller
Troubleshooting Indicators
Mode[1]
Processor
Memory
Run
DC ON
Procedures to Correct Fault
ON
OFF
OFF
ON
1. Cycle line power.
2. Replace Processor
T, R,
or R/P
OFF
OFF
OFF
OFF
1. Check Power Supply fuse.
2. Check AC line voltage.
3. Cycle line power.
4. Verify Power supply load
does not exceed 6.5A
5. Replace System Power Supply
T or R
ON
ON
OFF
ON
1. Connect Industrial Terminal to
Processor and turn Mode Select
Switch to PROG.
2. If a run-time error occurred,
correct it.
3. If a Processor fault occurred, turn
keyswitch back to TEST or RUN.
4. Replace Processor
R or R/P
OFF
OFF
OFF
ON
1. Check AC line voltage.
2. Measure Power Supply output
voltages. Replace Power Supply.
3. Measure voltages through I/O
Power Cable. Replace I/O Power
Cable.
4. Replace Processor.
R/P
OFF
ON
OFF
ON
1. Connect Industrial Terminal to
Processor.
2. Correct run-time error.
R/P
ON
ON
OFF
ON
1. Turn Mode Select Switch to PROG
and back to RUN/PROG.
2. Replace Processor.
[1]
T = TEST POSITION
R = RUN POSITION
R/P = RUN/PROGRAM POSITION
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