ControlMaster CM30, CM50 and CMF310
Universal process controllers,
1
/
4
,
1
/
2
DIN and fieldmount
7 Advanced Level
IM/CM/ED–EN Rev. X
59
…Process Alarm
Alarm 1 (8)
Type
Alarm types comprise:
High Process, Low Process, High Latch, Low Latch
.
(Deviation alarms are configured using a high or low process alarm and selecting
Deviation
as the source.)
Tag
The alarm
Tag
is displayed as a diagnostic message and appears in the
Diagnostic
Status
Bar
and the Diagnostic view in the
Operator Level
.
S
ource
The analog source – see Appendix A, page 104 for description of sources.
Trip
Alarm trip level in engineering units.
Hysteresis
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 on page 58.
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.
Display Enable
Enables an alarm to be used for control purposes without it appearing as an active
alarm state in the
Operator
level or
Diagnostic
views.
Acknowledge
S
ource
The source required to acknowledge all active
alarms. Acknowledge occurs on rising edge of the
digital signal – see Appendix A, page 104 for
description of sources.
Enable
S
ource
The source required to enable alarms. If
the
source is
None
, alarms are always enabled
– see Appendix A, page 104 for description of sources.
Acknowledge