Danfoss VACON 100 FLOW Series Application Manual page 245

VACON® 100 FLOW
Application Guide
11.15.6.5 (ID 749) Response to PID Supervision Fault
Location in the menu: P3.13.6.5
Use this parameter to select the response of the drive to a 'PID Supervision' fault. If the PID feedback value is not in the supervision
limits for longer than the supervision delay, a PID supervision fault occurs.
11.15.7 Pressure Loss Compensation
When pressurizing a long pipe that has many outlets, the best position for the sensor is in the middle of the pipe (the position 2 in
the figure). It is also possible to put the sensor directly after the pump. This gives the right pressure directly after the pump, but
farther in the pipe, the pressure drops with the flow.
A
PT
E
Illustration 83: The Position of the Pressure Sensor
A Pressure
B No flow
C With flow
11.15.7.1 (ID 1189) Enable Setpoint 1
Location in the menu: P3.13.7.1
Use this parameter to enable the pressure loss compensation in the pump system. In a pressure-controlled system, this function
compensates the pressure loss that occurs at the end of the pipe line due to the liquid flow.
11.15.7.2 (ID 1190) Setpoint 1 Max Compensation
Location in the menu: P3.13.7.2
Use this parameter to set the maximum compensation for PID setpoint value that is applied when the output frequency of the drive
is at the maximum frequency. The compensation value is added to the actual setpoint value as a function of the output frequency.
Setpoint compensation = max compensation * (FreqOut-MinFreq)/(MaxFreq-MinFreq).
The sensor is put in position 1. The pressure in the pipe stays constant when there is no flow. But with flow, the pressure decreases
farther in the pipe. To compensate for this, lift the setpoint as the flow increases. Then the output frequency makes an estimate of
the flow, and the setpoint increases linearly with the flow.
Danfoss A/S © 2023.08
B
C
PT
F
D Pipe length
E Position 1
F Position 2
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Parameter Descriptions
D