Parameters
42
Operating manual INVEOR
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 process 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.
Fig. 19: Stand-by function in PID process control
Summary of Contents for INVEOR MA
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