Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual page 492

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492 Fault Messages and Error Codes
Error Advisory Message
Code
(Hex)
0001 NVRAM ERROR
0002 UNEXPECTED RESET
0003 MEMORY MODULE
USER PROGRAM IS
CORRUPT
0004 MEMORY INTEGRITY
ERROR
0005 Reserved
Publication 1763-RM001C-EN-P - October 2009
Manually Clearing Faults Using the Fault Routine
The occurrence of recoverable or non-recoverable user faults can cause
the user fault subroutine to be executed. If the fault is recoverable, the
subroutine can be used to correct the problem and clear the fault bit S:1/
13. The controller then continues in the Run or test mode.
The subroutine does not execute for non-user faults. See User Fault
Routine on page 262 for information on creating a user fault subroutine.
Fault Messages
This section contains fault messages that can occur during operation of
the MicroLogix 11 programmable controller. Each table lists the error code
description, the probable cause, and the recommended corrective action.
Description
The default program is loaded to the
controller memory. This occurs:
• if a power down occurred during
program download or transfer
from the memory module.
• RAM integrity test failed.
• The controller was unexpectedly
reset due to a noisy environment
or internal hardware failure.
• The default program is loaded.
Memory module memory error. This
error can also occur when going to
the Run mode.
While the controller was powered
up, ROM or RAM became corrupt or
when background integrity check
failed.
N/A
Fault Recommended Action
Classification
• Re-download or transfer the program.
Non-User
• Verify battery is connected.
• Contact your local Rockwell Automation
representative if the error persists.
• Refer to proper grounding guidelines and
Non-User
using surge suppressors in your controller's
User Manual.
• Verify battery is connected.
• Contact your local Rockwell Automation
representative if the error persists.
Non-User Re-program the memory module. If the error
persists, replace the memory module.
• Cycle power on your unit. Then,
Non-User
re-download your program and start up your
system.
• Refer to proper grounding guidelines and
using surge suppressors in your controller's
User Manual.
• Contact your local Rockwell Automation
representative if the error persists.
N/A