Diagnostics and Troubleshooting Fault Detection and Troubleclearing

Controller

Diagnostic Summary

(In the User Utility and Operator

Interface)

Controller

LED on CPU

Fault Detection / Troubleclearing

Menu

Status

Item

 

 

 

Possible Cause

Controller Action

User Action

 

 

CPU

ADDRESS

 

ERROR

 

 

CPU

INSTRUCTION

 

ERROR

 

 

CPU

VECTOR

 

ERROR

 

 

POWER LED flashes 4 times.

POWER LED flashes 4 times.

POWER LED flashes 4 times.

Address Error Detected.

Bad Instruction Detected.

Bad Vector

Interrupt.

Executes normally.

Executes normally.

Executes normally.

1.Force a cold start. (Toggle controller mode switch from PGM to RUN.)

2.Isolate system from noise and force a cold start.

3.Replace CPU board.

1.Force a cold start. (Toggle controller mode switch from PGM to RUN.)

2.Isolate system from noise and force a cold start.

3.Replace CPU board.

1.Force a cold start. (Toggle controller mode switch from PGM to RUN.)

2.Isolate system from noise and force a cold start.

3.Replace CPU board.

Release F

UMC800 Controller Installation and User Guide

83

4/01

 

 

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Image 91
Honeywell UMC800 manual Cpu