
Publication 1747-6.1
Chapter
9
Troubleshooting
This chapter describes the most common troubleshooting procedures.
It describes:
• troubleshooting module problems using the Communications
LED
• troubleshooting module problems using the module display
• troubleshooting communications problems using the module
display
• troubleshooting function problems using the module display
• troubleshooting MSG instruction error codes
• troubleshooting processor faults using the module display
Troubleshooting
Module Problems
Using the
Communications LED
Refer to the following log to determine the status of the LED
indicators:
Indicates the LED is OFF.
Indicates the LED is ILLUMINATED RED.
Indicates the LED is FLASHING RED.
Indicates the LED is ILLUMINATED GREEN.
Indicates the LED is FLASHING GREEN.
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