User`s guide

On-line Monitoring and Diagnostics
Controller Diagnostics
Release E UMC800 Control Builder User’s Guide 213
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Details of controller diagnostics
Table 52 lists the status indications, possible cause, and actions to correct the problem
Table 52 Details of controller diagnostic summary
Class Status Possible Cause Controller Action User Action
SYSTEM GOOD Controller is in RUN
mode.
Executes the run
mode. Outputs
are updated.
None
SYSTEM OFF-LINE MODE
Controller is in OFF-
LINE mode.
Allows
calibration.
Outputs are
updated.
Return to RUN mode as
appropriate.
SYSTEM PROGRAM
MODE
Controller is in
PROGRAM mode.
Controller outputs
are disabled.
Return to RUN mode as
appropriate.
SYSTEM INVALID CONFIG
A configuration of
more than 8 loops
was downloaded to
an 8 loop controller.
Empty database
created.
Download previous valid
configuration.
SYSTEM SWITCH FAULT Bad switch
Controller outputs
are disabled.
1. Toggle controller switch
between RUN and
PROGRAM.
2. Replace CPU board.
SYSTEM TASK FAULT Software failure Controller outputs
are disabled.
1. Force a cold start by
toggling controller switch
between PROGRAM and
RUN.
2. Upgrade Controller
software.
3. Replace CPU board.
4. Contact Honeywell
service.
CPU GOOD N/A N/A N/A
CPU WATCHDOG Watchdog reset
resulting from
software failure.
Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Upgrade Controller
software.
3. Replace CPU board.
4. Contact Honeywell
Personnel.