TM 5-3895-374-24-1
The Following
Probable Cause
Recommended Action
Error Exists
Initial CPU Factory
procedures
Condition In Effect
2 Clear processor memory to get rid of the flashing FLT
LED
1 Use programmer to monitor and clear the fault (or if
keyswitch in REM)
a. Monitor Status File Word S 6 for major error
code
b. Refer to the Advanced Programming Software
User Manual (Catalog Number 1747-NM002)
Hardware/
for error codes and additional troubleshooting
CPU Major
Software Major
Information
Fault
Fault Detected
c Remove hardware/software condition causing
fault
Erratic repetitive
d Clear Status File S 1/13 major error bits, if set
power cycling can
e. Clear Status File S 5 minor error bits, it set
cause a CPU
f. Clear Status File S 6 major error code
major hardware
(optional)
fault
g. Attempt a processor Run mode entry
If unsuccessful, repeal recommended action steps
above
2. Use the keyswitch to clear the fault Toggle the
keyswitch to PROG and back to RUN (See page
-11 ) If FAULT occurs again, use programmer to
get error, code and determine the source of problem
The Following
Probable Cause
Recommended Action
Error Exists
1. Monitor program file online and identify forced I/O
System does
User Forced 1/O
2. Disable appropriate forces and test system
not operate per
Disabling
conditions again
ladder logic
Operation
Refer to the Advanced Programming Software User
Manual (Catalog Number 1747-NM002)
Refer to the following key to determine the status
of the LED indicators
Indicates the LED is OFF
Indicates the LED is ON
Indicates the LED is FLASHING
Status of LED does not matter
Chapter 9
Troubleshooting
(page 3-448)
