Programmer (HHP) User guide

Label Fault Code (Hex)
Advisory Message
Chapter 20
T roubleshooting Y our System
20–11
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.
Clearing Controller Faults
There are three ways you can clear a fault:
• manually, by viewing the fault display
• automatically, using the Fault Override bit (S1/8) or the Run Always bit
(S1/12) and cycling power
• implementing the user-fault routine and clearing bit S1/13 within it
Manually Clearing Faults
You can manually view and clear a fault by accessing the fault display.
F
L T : x x x x H
< m e s s a g e >
Follow these steps to manually clear a fault:
1. From any of the functional areas, access the fault display.
FAULT
PRE/LEN
F
L T : 0 0 2 0 H
M I N O R E R R A T E N D
If you press this key and a fault does not exist, the message NO MAJOR
FAULT is displayed. Press any key to return to the previous screen.
Identifying Controller Faults