CHAPTER
6
DIAGNOSTICS AND TROUBLESHOOTING
Diagnostics have two functions; they:
n Automatically alert system operation to react appropriately to
operating conditions (particularly in the event of a system fault).
n Provide external indications that enable operating and
maintenance personnel to react appropriately when external
actions are required.
The following diagnostic indicators are provided for the CN100
Controller:
n Light Emitting Diodes (LEDs) that assist with troubleshooting
activities solely at the controller. LEDs are also useful for verifying
indications viewed as screen items. LED indicators are provided
for the following hardware components:
l Redundant Controller indicators
l Expansion I/O indicators
n Control Builder display messages on the PC.
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