2) In systems where the pressure or temperature is controlled by an external PI controller, the wake up conditions
can not be based on feedback from the pressure/temperature transducer as the setpoint is not known. In the
example with a boost system, desired pressure Pset is not known. par.1-00
Configuration Mode must be set for
Open Loop.
Example: Boost system.
When low power or low speed is detected the motor is stopped, but the reference signal (f
ref
) from the external
controller is still monitored and because of the low pressure created, the controller will increase the reference
signal to gain pressure. When the reference signal has reached a set value f
wake
the motor restarts.
Parameter Description
TR200 Programming Guide 217
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