KFU-
tronic
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Stand-by function in PID process control:
This function can provide energy savings in applications such as booster stations where PID
process control is used to control to a specific process value and the pump has to run on a
“minimum frequency” (1,020).
As the inverter can reduce the rotation speed of the pump in normal operation when the proc-
ess variable is reducing, but is never able to fall below the “minimum frequency” (1,020), this
provides the opportunity of stopping the engine if it is running during a waiting time, the “PID
stand-by time” (3,070) with the “minimum frequency” (1,020).
Once the reference diverges from the set % value, the “PID stand-by hysteresis” (3,071), the
control (the motor) is started again.
Содержание KFUtronic Series
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