West Control Solutions ProVU 4 - Manual (Page 134)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 1 – March 2008 Glossary Page 133
Output Off . . Output On
Alarm Off . . Alarm On
Direct-Acting
Alarm. Value
Output On . . Output Off
Alarm Off . . Alarm On
Reverse-Acting
Alarm. Value
Output On . . Output Off
Alarm On . . Alarm Off
Direct-Acting
Alarm. Value
Output Off . . Output On
Alarm On . . Alarm Off
Reverse-Acting
Alarm. Value
Output On . . Output On
Alarm On . . Alarm On
Direct-Acting
Alarm Value Alarm Value
Output Off .
Alarm On . . Alarm On
Reverse-Acting
Alarm Value Alarm Value
Output Off . . Output On
Alarm Off . . Alarm On
Direct-Acting
Alarm Value
Output On .
Alarm Off . . Alarm On
Reverse-Acting
Alarm Value
Output On . . Output Off
Alarm On . . Alarm Off
Direct-Acting
Alarm Value
Output Off . . Output On
Alarm On . . Alarm Off
Reverse-Acting
Alarm Value
Process High Alarm
Process Variable
Process High Alarm
Process Variable
Process Low Alarm
Process Variable
Process Low Alarm
Process Variable
Band Alarm Output Off
Alarm Off
Process Variable
Band Alarm Output On . Output Off
Alarm Off
Process Variable
Deviation High
Alarm (+ve values)
Process Variable
Deviation High
Alarm (+ve values) . Output Off
Process Variable
Setpoint
Process Variable
Deviation Low
Alarm (-ve values)
Process Variable
Deviation Low
Alarm (-ve values)
Alarm Operation
The Process and Deviation Alarm types are illustrated, together with the action of any
associated outputs.
Also refer to: Alarm Hysteresis, Alarm Inhibit, Alarm Types, Band Alarm Value, Deviation
Alarm, Latching Relay, Logical Alarm Combinations, Loop Alarm, Process High Alarm and
Process Low Alarm.
Figure 50. Alarm Operation