Temperature Controller - Staveb AG

4-8 Parameter Adjustments and Application ConsiderationsFigure 4.14Upper-limitalarmAlarm hysteresisLower-limitalarmAlarm hysteresisONNormalOperatingAreaONNormalOperatingAreaOFFSPAlarm valueOFFAlarm valueSPAlarm hysteresis is set independently in the Alarm Hysteresis 1 parameter(Advanced Setting function group). Note: The default is 0.2 EU (°C or °Fdepending on your units selection).Standby Alarm SequenceStandby alarm sequence is a function which allows you to configure the alarmoutputs to be temporarily disabled until after the first alarm condition occurs.From then on, the alarm output is active for all future alarm conditions.For example, in a standard heating application, if you used the standard lowalarm configuration, the alarm would be active as soon as you switch thecontroller ON. However, with standby sequence, the alarm output is disabledduring the first warm-up, and the temperature has to rise above the alarm setpoint before the alarm can become active. Then, if the temperature falls belowthe alarm set point, the output is active.RestartAs mentioned above, the standby sequence is canceled after the first real alarmclears. If desired, it can be restarted later by the Standby Sequence parameter(Advanced Setting function group). For details, see p. 5-31, Standby SequenceReset Method.Alarm LatchAlarm latch is a function where you can configure the alarm output onceturned ON to stay ON regardless of the process temperature.• The alarm latch function can be canceled by turning the power OFF.(Note, however, that it can also be canceled by switching to the InitialSetting function group, Communications Setting function group,Advanced Setting function group, or Calibration function group.Publication 900-UM003C-EN-E - January 2004