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3.2.5: Dashboard/Circuit Details
The dashboard provides a comprehensive single circuit view. It includes
the circuit number, tag, pipeline number, or other status as well as
real-time temperature, heater current, ground leakage current and
related alarm set points. This screen can be reached by tapping a circuit
in the Overview or the Circuit List. The limits below define the lowest
and highest possible values. (The bounds define the constraints for
valid values, e.g. maintain temperature should not be set below the low
temperature alarm.)
Circuit Alarms
In the event that the measured conditions of the heat trace circuit fall
outside the user-defined parameters, the Genesis Controller will notify
the user. When an alarm condition first occurs, the common alarm
digital output will annunciate and a message will appear on the Circuit
Screen to inform the user of the type of alarm present. Pressing will
acknowledge the alarm and deactivate the digital output. Alarms will
automatically clear when the alarm condition is no longer present.
Circuit Trips
In the event that the measured conditions of the heat trace circuit go
beyond the TRIP settings of the circuit, the circuit will trip, i.e. turn off.
When a circuit trips, the circuit will be deactivated and a corresponding
message will be displayed. (A TRIP event is different from an ALARM
event in that the heat trace circuit is deactivated and will remain
deactivated until the circuit is manually reset by the user.)
Note: In general, the alarm will not clear until the measured conditions
of the heat trace circuit fall within the user-defined parameters. For
instance, a low current alarm will not clear simply because a circuit heater is de-energized (i.e. no longer
calling for heat). It will remain active until the measured current value is confirmed to be above the low
current set point, (i.e. on the next heating cycle when the heater is energized).
The line below the circuit name will indicate any alarm(s) present. Where multiple alarm events occur on a
circuit, the line will display only one alarm message at a time until all have been cleared. A summary of all
possible alarm messages follows.
Message Explanation
RTD FAULT ALARM
The RTD reading is out of the range when the resistance value exceeds 313.7 Ohms or is less than 48.46
Ohms. In this case, either the RTD has not been connected or has opened or shorted in service.
LOW TEMP ALARM
The temperature being read on this circuit is below the value programmed as the lowest temperature
allowed before an alarm condition should be reported. The low temp alarm will automatically clear when
the low temperature condition clears.
HIGH TEMP ALARM
The temperature being read on this circuit is above the value programmed as the highest temperature
allowed before an alarm condition should be reported. The high temp alarm will automatically clear when
the high temperature condition clears.
HIGH-HIGH TEMP (OPTION TRIP)
The temperature being read on this circuit is above the value programmed as the highest temperature
allowed before a High-High condition is reported. When the temperature trip is enabled and a temperature
exceeds the TRIP level, the event must be acknowledged, and the temperature level must drop below the
TRIP set point value before the circuit will re-energize. Once the alarm is acknowledged the alarm color
message will change from Red to Orange. When the trip is not enabled, trip temp alarm will automatically
clear when the reading returns to normal condition.
Ground Current HIGH ALARM
The ground/earth leakage current being read on this heater (and associated wiring) circuit is above the value
programmed as the highest leakage current allowed before an alarm event is reported. The ground/earth
current alarm setting will automatically clear when the high ground/earth current alarm event clears.
Ground Current HIGH-HIGH ALARM (OPTION TRIP)
The ground/earth leakage current being read on this circuit (and associated wiring) is above the value
programmed as the highest heater leakage current allowed before a TRIP event is reported. When the
ground/earth leakage current exceeds the TRIP level, the condition must be acknowledged, and the leakage
current level must drop below the TRIP set point value before the circuit will re-energize.
LOW Current ALARM
The amperage being read on this circuit is below the value programmed as the lowest heater operating
current allowed before an alarm condition is reported. This event is reported as a LOW Current ALARM.
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