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)
Typ e 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.
Source 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 Source 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 Source The source required to enable alarms. If the source is None, alarms are always enabled
– see Appendix A, page 104 for description of sources.
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