Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
578 Fault Messages and Error Codes
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 310 for information on creating a user fault subroutine.
Fault Messages
This section contains fault messages that can occur during operation of
the MicroLogix 1400 programmable controller. Each table lists the error
code description, the probable cause, and the recommended corrective
action.
Error Codes
Error
Code
(Hex)
Advisory Message Description Fault
Classification
Recommended Action
0001 NVRAM ERROR 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.
Non-User •Re-download or transfer the program.
•Verify battery is connected.
•Contact your local Rockwell Automation
representative if the error persists.
0002 UNEXPECTED RESET •The controller was unexpectedly
reset due to a noisy environment
or internal hardware failure.
•The default program is loaded.
Non-User •Refer to proper grounding guidelines and
using surge suppressors in your controller’s
User Manual.
•Verify battery is connected.
•Contact your local Rockwell Automation
representative if the error persists.
0003 MEMORY MODULE
USER PROGRAM IS
CORRUPT
Memory module memory error. This
error can also occur when going to
the Run mode.
Non-User Re-program the memory module. If the error
persists, replace the memory module.
0004 MEMORY INTEGRITY
ERROR
While the controller was powered
up, ROM or RAM became corrupt or
when background integrity check
failed.
Non-User •Cycle power on your unit. Then,
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.
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Allen-Bradley MicroLogix 1400 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1400
Category	Controller
Language	English