Installation manual

1 Publication 1747-RM001G-EN-P - November 2008

Chapter

Troubleshooting Faults

This chapter lists the major error fault codes, indicates the probable causes of

faults, and recommends corrective action. This chapter also explains the

operating system download faults for the SLC 5/03 (and higher) processors.

Automatically Clear Faults

The following section describes the different ways to automatically clear a fault

using your programming software.

SLC Processors

• Set the Fault Override at Powerup Bit S:1/8 in the status file to clear the

fault when power is cycled, assuming the user program is not corrupt.

• Designate a User Fault Routine Number in S:29 and program that

ladder subroutine file to attempt to correct the fault and clear S:1/13.

• Set the Startup Protection Fault Bit, S:1/9 which executes the user fault

routine prior to the execution of the first scan of the ladder program

when a fault condition exists.

• Set one of the autoload bits S:1/10, S:1/11, or S:1/12 in the status file

of the program in an EEPROM to automatically transfer a new

non-faulted program from the memory module to RAM when power is

cycled.

TIP

You can declare your own application-specific major fault by

writing your own unique value to S:6 and then setting bit

S:1/13.