Main Menu - Fc Closed Loop - Group - Danfoss VLT DriveMotor FCP 106 Programming Manual

Parameters

4.15 Main Menu - FC Closed Loop - Group

20
This parameter group is used for configuring the closed-
loop PI controller, that controls the output frequency of
the frequency converter.
4.15.1 20-0* Feedback
4 4
This parameter group is used to configure the feedback
signal for the closed-loop PI control of the frequency
converter.
20-00 Feedback 1 Source
Option:
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[100] Bus Feedback 1
[104] Sensorless Flow
[105] Sensorless Pressure
20-01 Feedback 1 Conversion
Option:
[0] Linear
*
[1] Square
root
20-12 Reference/Feedback Unit
Option: Function:
[0] None See parameter 20-02 Feedback 1 Source Unit for details.
4.15.2 20-2* Feedback/Setpoint
This parameter group is used to determine how the PID
controller uses the 3 possible feedback signals to control
the output frequency of the frequency converter. This
group is also used to store the 3 internal setpoint
references.
20-21 Setpoint 1
Range:
0
ProcessCtrlUnit
102
Function:
This parameter defines the inputs
used as the source of the feedback
signal.
Function:
This parameter allows a conversion function to
be applied to feedback 1.
[0] Linear has no effect on the feedback.
[1] Square root is commonly used when a
pressure sensor is used to provide flow
feedback
( ).
( flow ∝ pressure)
Function:
[-999999.999 - Setpoint 1 is used in closed-
999999.999 loop mode to enter a setpoint
*
ProcessCtrlUnit] reference that is used by the
frequency converter's PID
controller. See the description
Danfoss A/S © 11/2015 All rights reserved.
®
VLT DriveMotor FCP 106/FCM 106
20-21 Setpoint 1
Range:
4.15.3 20-6* Sensorless
20-60 Sensorless Unit
Select the unit to be used with parameter 18-50 Sensorless
Readout [unit].
Option:
[0]
[20]
20-69 Sensorless Information
Range:
0 [0 - 25 ]
*
4.15.4 20-8* PI Basic Settings
Parameters for configuring the process PI control.
20-81 PI Normal/ Inverse Control
Option:
[0] Normal Causes the frequency converter output frequency
*
[1] Inverse Causes the frequency converter output frequency
20-83 PI Start Speed [Hz]
Range:
0 Hz
*
200.0 Hz]
Function:
of parameter 20-20 Feedback
Function.
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter group 3-1*
References).
None
l/s
Function:
View information about the sensorless data.
Function:
to decrease when the feedback is greater than the
setpoint reference. This behavior is common for
pressure-controlled supply fan and pump
applications.
to increase when the feedback is greater than the
setpoint reference. This behavior is common for
temperature-controlled cooling applications, such
as cooling towers.
Function:
[ 0 - Enter the motor speed to be attained as a
start signal for commencement of PI control.
After power-up, the frequency converter
operates using speed open-loop control.
When the process PI start speed is reached,
the frequency converter changes to PI control.
Function:
MG03N202