Additional Functions; Start Functions; Start/Stop Threshold - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK

Additional functions

4. Additional functions

4.1 Start functions

4.1.1 Start/stop threshold

Start threshold allows the user to create a scenario, in which an external requirement must be met before
start is possible. If the external requirements are met, stop threshold stops the DG immediately when in "cool-
ing down" mode.
Access the external measurement by using one of the multi-inputs and, in parameters 6185 and 6213, apply
the specific multi-input to use for the start/stop threshold function.
In parameters 6186 and 6214, you can enable/disable the start and stop threshold function and adjust the set
point.
In addition, the alarm can either be set to high (checked) or low (unchecked). If "High Alarm" is checked, the
measured external value must exceed the set point before start is possible, or before immediate stop when
the "cooling down" timer is counting.
If "High Alarm" is unchecked, start/stop is possible when the measured value is under the set point.
The diagram below shows an example, in which the RMI signal builds up slowly, and starting is initiated at the
end of the third start attempt.
DEIF A/S Page 24 of 122