Soft Failures - Honeywell Experion C300 User Manual

Fault classifications

Soft Failures

Control Builder indications and error log
Using Control Builder, you can view the current state of controllers in the system. In the
Control Builder monitor tab, a hard failure in the controller is denoted by a red controller
icon indicating no communication. See
listing of the C300 Controller icons that may appear in Control Builder.
The Errlog_n.txt log provides a running list of Control Builder detected errors in
chronological order. The n represents any number that is assigned to the most recent log.
To check the log, navigate to this file location on the server: C:\Documents and Settings\All
Users\Application Data\Honeywell\Experion\Errlog_n.txt.
Soft Failures
Soft Failures are detected also through execution of the Controller's
diagnostics. Soft failures do not cause change in the state of the controller's execution
environments (C300CEE or IOLINK blocks). There is no loss of control or loss of view
when a controller detects a soft failure.
In a redundant controller pair, a soft failure in a synchronized primary controller does not
cause a switchover to the backup controller. A soft failure in the backup controller does
not result in a loss of synchronization, if the redundant controller pair is synchronized.
Alarm displays and Control Builder forms
Soft failures are annunciated to the Alarm Summary and the C300 Controller Function
Block Detail displays in Station. In Control Builder, soft failure status is indicated on:
The Main tab (Soft Failures Present) of the configuration form for the associated
•
C300 Controller block.
The Soft Failures tab
•
possible soft failure conditions as shown in
238
Control Builder icon descriptions
of the controller block configuration form includes a list of the
Experion C300 Controller User's Guide
Honeywell
for a complete
background
R301.1
11/06