43Publication 1769-UM020A-EN-P - December 2009 43
Chapter
4
Module Diagnostics and Troubleshooting
Introduction
Safety Considerations
Safety considerations are an important element of proper
troubleshooting procedures. Actively thinking about the safety of
yourself and others, as well as the condition of your equipment, is of
primary importance.
The following sections describe several safety concerns you should be
aware of when troubleshooting your control system.
Power Status Indicator
When the green status indicator on the analog module is illuminated,
it indicates that power is applied to the module and the module is
operating without error. A module that has sensed a fault condition or
is being held in reset by the system’s controller does not illuminate the
module’s status indicator even though power is still applied.
Topic Page
Safety Considerations 43
Power Cycle Diagnostics 45
Channel Diagnostics 45
Non-critical versus Critical Module Errors 45
Module Error Definition Table 46
Error Codes 47
Module Inhibit Function 50
Contacting Rockwell Automation 50
ATTENTION
Never reach into a machine to actuate a switch because
unexpected motion can occur and cause injury.
Remove all electrical power at the main power-disconnect
switches before checking electrical connections or
inputs/outputs causing machine motion.
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