Rockwell Automation 1785 PLC-5 Manuel d'utilisateur Page 165

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Troubleshooting
Extended Local I/O 5-45
Troubleshooting
Extended Local I/O 5-45
Fault Codes
Fault routines execute when a PLC-5 processor encounters a run-time error (major fault) during program execution. 3.
A fault routine processes the major fault bit found in S:11 and determines the course of program execution based on the fault bit present. Fault
routines provide a means to either:
systematically shut down a process or control operation
log and clear the fault and continue normal operation
For more information about fault routines, see Enhanced and Ethernet PLC-5 Programmable Controllers User Manual, publication 1785-6.5.12.
Clearing Faults
When a major fault occurs, you need to clear faults before your process can continue.
!
ATTENTION: Clearing a major fault does not correct the cause of the fault. Be
sure to examine the fault bit and correct the cause of the fault before clearing it.
For example, if a major fault is encountered that causes bit S:11/2 to be set, which
indicates a
programming error
, do not use a routine to clear the fault until you
correct your program.
Fault Codes
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