Allen-Bradley MicroLogix 1200 Reference Manual page 384

D-2 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 RETENTIVE DATA IS
LOST (MicroLogix
1200 only)
Publication 1762-RM001C-EN-P
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 18-6 for information on creating a user fault subroutine.
Fault Messages
This section contains fault messages that can occur during operation of
the MicroLogix 1200 and MicroLogix 1500 programmable controllers. 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.
• FLASH integrity test failed
(MicroLogix 1200 only).
• The controller was unexpectedly
reset due to a noisy environment
or internal hardware failure.
• The default program is loaded.
(MicroLogix 1500 only)
• Retentive Data is lost. See page
C-12. (MicroLogix 1200 only)
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.
Retentive Data is lost. See page
C-12.
Fault Recommended Action
Classification
• Re-download or transfer the program.
Non-User
• Verify battery is connected (MicroLogix
1500 only).
• 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 (MicroLogix
1500 only).
• 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.
Recoverable Contact your local Rockwell Automation
representative if the error persists.