YOKOGAWA UP55A - Page 310

11-3
IM 05P02C41-01EN
Alarm Functions
11
DeviationHighLimitAlarmandDeviationLowLimitAlarm,Deviation(%)High
LimitAlarm,Deviation(%)LowLimitAlarm
PV
Alarm hysteresis
Alarm hysteresis
Deviation low limit
alarm setpoint (negative setpoint)
Time
ON OFF
OFF
ON OFFOFF
Deviation high limit
alarm output
Deviation low limit
alarm output
Target setpoint
(SP)
Contact type in the figure above: Energized when an event occurs (factory default).
When a negative setpoint is set for the deviation high limit alarm setpoint, the deviation setpoint will be
lower than the SP.
Moreover, when a positive setpoint is set for the deviation low limit alarm setpoint, the deviation setpoint
will be higher than the SP.
Set the alarm setpoints and hysteresis for deviation(%) high limit and deviation(%) low limit alarms as
percentages of the setpoint. Set the alarm setpoint of the deviation low limit alarm with a negative value.
Deviation high limit
alarm setpoint (positive setpoint)
DeviationHighandLowLimitsAlarm,Deviation(%)HighandLowLimits
Alarm
PV
Alarm hysteresis
Alarm hysteresis
Deviation high and
low limits alarm setpoint
Time
ON OFF OFF ON OFF
Deviation
high and low limits
alarm output
Target setpoint
(SP)
Contact type in the figure above: Energized when an event occurs (factory default).
Set the alarm setpoint and hysteresis for a deviation(%) high and low limits as
percentages of the setpoint.
11.1SettingAlarmType