West Control Solutions ProVU 4 - Manual (Page 133)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
Page 132 Glossary 59407, Issue 1 – March 2008
Figure 49. Alarm Hysteresis Operation
PROCESS HIGH
ALARM
PROCESS LOW
ALARM
BAND ALARM
DEVIATION
HIGH ALARM
DEVIATION LOW
ALARM
Inactive Inactive
Inactive
Inactive
Inactive Inactive
Alarm Inactive Alarm Inactive
Alarm Active
Active
Inactive Inactive
Active Active Inactive
Active
Active
Alarm Value
Alarm Value
Alarm Value
(from Setpoint)
Setpoint
Process Variable
Process Variable
Process Variable
Process Variable
Process Variable
Alarm Hysteresis Value
Alarm Hysteresis Value
Alarm Hysteresis Value
Alarm Hysteresis Value
Alarm Hysteresis Value
Alarm Hysteresis Value
Setpoint
Setpoint
Alarm Value
(from Setpoint)
Alarm Value
(from Setpoint)
Alarm Value
(from Setpoint)