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CONFIGURATION
PROCESS ALARM
CONFIGURATION
ALARM TO CONFIGURE
PROCESS ALARM
TYPE
OFF
LOW PROCESS
HIGH PROCESS
OFF
NONE
PROCESS ALARM
SOURCE
ANLG I/P
PROCESS ALARM
TRIP
PROCESS ALARM
HYST
High Process
Low Process
Process Variable
Hysteresis
Hysteresis
Trip Point
Alarm On
Alarm Off
Alarm On
Alarm Off
3.3
Alarms
3.3.1
Process Alarm Configuration Page
Information.
•
12 Process alarms – identified A to M (excluding I).
•
Up to six alarms can be assigned to relays.
•
High/low process alarms.
•
Alarms assignable to any analog input.
•
Adjustable hysteresis value – to prevent oscillation of alarm state.
Alarm to Configure
Select the process alarm to configure. Up to twelve alarms (A to M, excluding I)
can be programmed. Each alarm can be assigned an Alarm Type, a Trip Level
and a Hysteresis setting. Alarm A is the highest priority and M the lowest.
On entry the default is
NONE
.
Alarm Type
An alarm type can be assigned to the alarm identity selected above.
Select the alarm type required:
OFF
– Sets alarm selected above to
OFF
LOW PROCESS
– Alarm activated when process falls below trip level
HIGH PROCESS
– Alarm activated when process rises above trip level
Alarm Source
An alarm source is assigned to the alarm identity selected above.
Select the alarm source required from analog inputs A1 to A6.
Trip Level
Set the trip level for the alarm selected above (the trip level set should not
exceed the display range limits by more than 10%).
Trip levels are displayed in engineering units.
Hysteresis
Hysteresis is operational when the alarm is active. Set the hysteresis value
required (in engineering units) between display full scale and zero.
The alarm is activated at the trip level but only turns off after the alarm variable
has moved into the safe region by an amount exceeding the hysteresis value.
Return to
Alarm to Configure
frame.