T
roubleshooting
Your System
14–7
Fault Messages
This section contains fault messages that can occur during operation of the
MicroLogix 1000 programmable controllers. Each table lists the error code
description, the probable cause, and the recommended corrective action.
Error Code
(Hex)
Advisory
Message
Description
Recommended Action
0001 DEFAULT
PROGRAM
LOADED
The default program is loaded to the controller
memory. This occurs:
• on power up if the power down occurred in
the middle of a download
• if the user program is corrupt at power up,
the default program is loaded.
• Re-download the program and enter
the REM Run mode.
• Contact your local Allen-Bradley
representative if the error persists.
0002 UNEXPECTED
RESET
The controller was unexpectedly reset due to
a noisy environment or internal hardware
failure. If the user program downloaded to the
controller is valid, the initial data downloaded
with the program is used. The Retentive Data
Lost Bit (S:5/8) is set. If the user program is
invalid, the default program is loaded.
• Refer to proper grounding guidelines
in chapter 2.
• Contact your local Allen-Bradley
representative if the error persists.
0003 EEPROM
MEMORY IS
CORRUPT
While power cycling to your controller, a noise
problem may have occurred. Your program
may be valid, but retentive data will be lost.
• Try cycling power again.
• Contact your local Allen-Bradley
representative if the error persists.
0004 RUNTIME
MEMORY
INTEGRITY
ERROR
While the controller was in the RUN mode or
any test mode, the ROM or RAM became
corrupt. If the user program is valid, the
program and initial data downloaded to the
controller is used and the Retentive Data Lost
Bit (S:5/8) is set. If the user program is invalid,
error 0003 occurs.
• Cycle power on your unit.
• Download your program and
re-initialize any necessary data.
• Start up your system.
• Contact your local Allen-Bradley
representative if the error persists.
0005 RETENTIVE DATA
HAS BEEN LOST
The data files (input, output, timer, counter,
integer, binary, control, and status) are corrupt.
• Cycle power on your unit.
• Download your program and
re-initialize any necessary data.
• Start up your system.
• Contact your local Allen-Bradley
representative if the error persists.
0008 FATAL INTERNAL
SOFTWARE
ERROR
The controller software has detected an invalid
condition within the hardware or software after
completing power-up processing (after the first
2 seconds of operation).
• Cycle power on your unit.
• Download your program and
re-initialize any necessary data.
• Start up your system.
• Contact your local Allen-Bradley
representative if the error persists.
Troubleshooting
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