Operator Interface Module Instruction Manual

A–B
8
Chapter
8–1
Troubleshooting and Maintenance
This chapter describes how to isolate and correct the most common
operating problems and routine maintenance tasks. It contains these sections:
Section Page
Troubleshooting Recommendations 8–1
Equipment Required 8–1
Common Operating Problems 8–2
Error Messages 8–2
Communication Error Codes 8–4
Using the Test Functions 8–5
DIP Switch Test 8–6
Display Test 8–7
Keyboard Test 8–8
Communication Port Test 8–9
RAM Test 8–10
System Memory Test 8–10
Program Memory Test 8–11
TXEN Test 8–12
Cleaning the display window 8–13
Most errors are accompanied by an error message. Find the error message in
the error message listing and perform the recommended corrective action.
If you encounter a problem that is not listed in the table, contact your local
Allen-Bradley distributor for assistance.
!
ATTENTION: Make sure that no objects are inserted or fall into
the terminal through the ventilation slots or DIP switch access
hole. Always disconnect power when checking wiring
connections. Failure to take adequate precautions may result in
severe electrical shock or equipment damage.
Other than verifying that the correct power source is connected to the
terminal (use a voltmeter), no electronic diagnostic equipment is required for
troubleshooting.
Chapter Objectives
Troubleshooting
Recommendations
Equipment Required