172 Main Processor Indicators
Trident Planning and Installation Guide
MP Alarm Indicators
The MP alarm indicators identify alarm conditions for the controller.
Field
Power
Logic
Power
System
Alarm
Program
Alarm
Over
Temp
Description Action
—
1
Red
steady
Red
steady
— — System power supply
is missing/bad.
Correct the problem.
Red
steady
—Red
steady
— — Field power supply is
missing/bad.
Correct the problem.
——Red
steady
— — Possible conditions
include:
MP or I⁄O module is
malfunctioning.
Identify the condition by
looking at the Pass or
Fault indicators of other
modules or by using the
TriStation Diagnostic
Panel.
Replace faulty module.
I⁄O module has
detected a field fault.
Correct field fault.
Application has
detected an alarm
condition.
Check application for
bypass or overridden
points or other abnormal
condition.
——— Blue
steady
— Application has
detected an alarm
condition. Alarm
contacts also indicate
an alarm (open
contacts).
Identify the fault
condition by using the
application.
Correct the condition.
——Red
steady
—Red
steady
Normal operation,
but the ambient
temperature is too
high (greater than
60°C/140°F).
Correct the
environmental problem
or the controller may fail
prematurely.
1. This symbol ( — ) means the indicator is not important for this condition.