ABB Navigator 500 Series - Process Alarm

Navigator 500
Sodium analyzer 7 Menu descriptions
54 OI/ASO550–EN Rev. G
7.1.6 Process Alarm
Process alarm examples
Used to configure up to 8 independent process alarms.
Menu Comment Default
Alarm 1 to 8
Source Selects the analog value for the process alarm source. None
Type Selects the alarm type from:
 High Process
 Low Process
 High Latch
 High Latch
High Process
Tag The alarm Tag is displayed as a diagnostic message and appears in the
Diagnostic Status Bar and on the Diagnostic View page at Operator level –
see page 31.
Alarm <n>
Trip The alarm trip level in engineering units. 0.0
Hysteresis The hysteresis trip level in engineering units. Activated at the alarm trip level
but deactivated only when the process variable has moved into the safe
region by an amount equal to the hysteresis value – see Process alarm
examples below.
0.0
Time Hysteresis If an alarm trip value is exceeded, the alarm does not become active until
the Time Hysteresis value has expired. If the signal goes out of the alarm
condition before the Time Hysteresis has expired, the hysteresis timer is
reset.
0
Fig. 7.2 High and low process alarm action
Fig. 7.3 High and low latch alarm action
Menu
Process Alarm
Exit
Select
Trip point
Process variable
Alarm on
Alarm off
Alarm on
Alarm off
High process
Low process
Hysteresis
Hysteresis
Alarm on
Alarm off
Hysteresis
Alarm latched
Alarm acknowledged by operator
Alarm acknowledged by operator
Alarm off
Trip point
Alarm On
Hysteresis
Alarm latched
High latch alarm
Low latch alarm
Trip point
Process
variable
Process Variable