Slc Fault Codes - Allen-Bradley SLC 500 BASIC User Manual

SLC Fault Codes

Spare Allen-Bradley Parts
The SLC processor and module operate independently of each other. The
following CALLs allow the SLC processor and module to interrupt each other.
Table 4.17 Interrupt CALLs
CALL Purpose
CALL 16 Enables interrupt capability when a DF1 packet is received.
CALL 17 Disables the DF1 packet interrupt capability.
CALL 20 Enables SLC processor interrupt capability.
CALL 21 Disables SLC processor interrupt capability.
CALL 26 Generates an interrupt to the SLC processor.
Fault codes are reported in word 6 of the SLC processor status file. The format of
the status word and applicable error codes are shown below:
Figure 4.7 SLC Fault Code Placement
4-digit Hex Number
Slot Number
Table 4.18 SLC Fault Codes
SLC Description
Fault
Code
57H Module has not
responded to a lock
shared memory command
within the required time
limit.
58H Module generated a
generic fault.
59H Module did not complete
a command within the
required time limit.
Programming Overview
Fault Code
Possible Cause
Module hardware problem.
Module internal stacks,
pointers, etc. (if XBY
instructions are used) are
corrupted by the user
program.
Module hardware problem.
Module internal stacks,
pointers, etc. (if XBY
instructions are used) are
corrupted by the user
program.
Module hardware problem.
Module internal stacks,
pointers, etc. (if XBY
instructions are used) are
corrupted by the user
program.
Publication 1746-UM004A-US-P
4-19
Recommended Action
Cycle power to the
module to re-initialize
parameters and re-run
the program.
Verify that module is
configured correctly
(correct I/O and M files).
Cycle power to the
module to re-initialize
parameters and re-run
the program.
Cycle power to the
module to re-initialize
parameters and re-run
the program.