Technical data

4–24 Troubleshooting
Significant Event Reporting
The controller’s fault-management software reports information about significant
events that occur. These events are reported via the:
■ Maintenance terminal
■ Host error log
■ Operator control panel (OCP)
Some events cause controller operation to terminate; others allow the controller to
remain operable. Each of these two instances are detailed in the following sections.
Events that cause controller termination
When an event causes the controller to terminate, there are three possible ways in
which it is reported:
■ Flashing OCP Pattern Display
■ Solid OCP Pattern Display
■ Last Failure
Use Table 4–4 to interpret flashing OCP patterns and Table 4–5 to interpret solid
OCP patterns. In the ERROR column of the solid OCP patterns, there are two
separate descriptions. The first denotes the actual error message that appears on your
terminal, and the second provides a more detailed explanation of the designated
error. Use this legend for both tables:
■
= reset button on
❏
= reset button off
●
= LED on
❍
= LED off