D-2Fault 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 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.

Error

Advisory Message

Description

Fault

Recommended Action

Code

 

 

 

Classification

 

 

(Hex)

 

 

 

 

 

 

 

 

 

 

 

 

0001

NVRAM ERROR

The default program is loaded to the

Non-User

•

Re-download or transfer the program.

 

 

controller memory. This occurs:

 

•

Verify battery is connected (MicroLogix

 

 

• if a power down occurred during

 

 

1500 only).

 

 

 

program download or transfer

 

• Contact your Conair Service

 

 

 

from the memory module.

 

 

representative if the error persists.

 

 

• RAM integrity test failed.

 

 

 

 

 

• FLASH integrity test failed

 

 

 

 

 

 

(MicroLogix 1200 only).

 

 

 

 

 

 

 

 

 

 

0002

UNEXPECTED RESET

•

The controller was unexpectedly

Non-User

•

Refer to proper grounding guidelines and

 

 

 

reset due to a noisy environment

 

 

using surge suppressors in your controller’s

 

 

 

or internal hardware failure.

 

 

User Manual.

 

 

•

The default program is loaded.

 

•

Verify battery is connected (MicroLogix

 

 

 

(MicroLogix 1500 only)

 

 

1500 only).

 

 

• Retentive Data is lost. See page

 

•

Contact your Conair service

 

 

 

C-12.(MicroLogix 1200 only)

 

 

representative if the error persists.

 

 

 

 

 

0003

MEMORY MODULE

Memory module memory error. This

Non-User

Re-program the memory module. If the error

 

USER PROGRAM IS

error can also occur when going to

 

persists, replace the memory module.

 

CORRUPT

the Run mode.

 

 

 

 

 

 

 

 

 

0004

MEMORY INTEGRITY

While the controller was powered

Non-User

•

Cycle power on your unit. Then,

 

ERROR

up, ROM or RAM became corrupt.

 

 

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 Coniar Service

 

 

 

 

 

 

representative if the error persists.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UGC007/0702

Basic 32 Loader Control