Configuration Possibilities, Overview - Danfoss VLT Programming Manual

3 Parameter Description
The feedback from the pressure transducer is monitored and when this pressure has dropped with a set percentage below the normal set point for
pressure (Pset), the motor will ramp up again and pressure will be controlled for reaching the set value (Pset).
3
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.
Configuration Mode
Par. 1-00
Example: Boost system.
When low power or low speed is detected the motor is stopped, but the reference signal (f
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
the motor restarts.
The speed is set manually by an external reference signal (Remote Reference). The settings (parameter group 22-3*) for tuning of the No Flow function
must be set to default.

Configuration possibilities, overview:

208
must be set for Open Loop.
MG.11.C9.02 - VLT
®
VLT HVAC Drive Programming Guide
) from the external controller is still monitored and because
ref
® is a registered Danfoss trademark
wake