Appendix D

Identifying Controller Faults

Fault Messages and Error Codes

This chapter describes how to troubleshoot your controller. Topics include:

•identifying controller faults

•contacting Rockwell Automation for assistance

While a program is executing, a fault may occur within the operating system or your program. When a fault occurs, you have various options to determine what the fault is and how to correct it. This section describes how to clear faults and provides a list of possible advisory messages with recommended corrective actions.

Automatically Clearing Faults

You can automatically clear a fault by cycling power to the controller when the Fault Override at Power-Up bit (S:1/8) is set in the status file.

You can also configure the controller to clear faults and go to RUN every time the controller is power cycled. This is a feature that OEMs can build into their equipment to allow end users to reset the controller. If the controller faults, it can be reset by simply cycling power to the machine. To accomplish this, set the following bits in the status file:

•S2:1/8 - Fault Override at Power-up

•S2:1/12 - Mode Behavior

If the fault condition still exists after cycling power, the controller re-enters the fault mode. For more information on status bits, see System Status File on page C-1.

NOTE

You can declare your own application-specific major fault

by writing your own unique value to S:6 and then setting

 

 

 

bit S:1/13 to prevent reusing system defined codes. The

 

recommended values for user-defined faults are FF00 to

 

FF0F.

Basic 32LoaderControl

UGC007/0702