Closed Loop 2 Pid - Danfoss VLT Aqua Drive FC 202 Programming Manual

Programming Guide | VLT® Aqua Drive FC 202

21-4* Closed Loop 2 PID

5.20.6
21-40 Ext. 2 Normal/Inverse Control
Default value: [0] Normal
Setup: All setups
Data type: Uint8
Option Name
[0*] Normal
[1] Inverse
21-41 Ext. 2 Proportional Gain
Default value: 0.50
Setup: All setups
Data type: Uint16
The proportional gain indicates the number of times the error between the setpoint and the feedback signal is to be applied.
21-42 Ext. 2 Integral Time
Default value: 20 s
Setup:
All setups
Data type: Uint32
Over time, the integrator accumulates a contribution to the output from the PID controller as long as there is a deviation between the
reference/setpoint and feedback signals. The contribution is proportional to the size of the deviation. This ensures that the deviation
(error) approaches 0. Quick response on any deviation is obtained when the integral time is set to a low value. Setting it too low,
however, may cause the control to become unstable. The value set is the time needed for the integrator to add the same contribution
as the proportional for a certain deviation. If the value is set to 10000, the controller acts as a pure proportional controller with a P-
band based on the value set in parameter 20-93 PID Proportional Gain. When no deviation is present, the output from the proportional
controller is 0.
21-43 Ext. 2 Differentiation Time
Default value:
0 s
Setup: All setups
Data type:
Uint16
The differentiator does not react to a constant error. It only provides a gain when the feedback changes. The quicker the feedback
changes, the stronger the gain from the differentiator.
21-44 Ext. 2 Dif. Gain Limit
Default value: 5
478 | © 2024.06
Parameter type:
Conversion index:
Change during operation:
Description
Reduces the output when feedback is higher than the reference.
Increases the output when feedback is higher than the reference.
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Parameter Descriptions
Option
–
True
Range, 0=Off - 10
-2
True
0.01 - 10000=Off s
-2
True
Range, 0=Off - 10 s
-2
True
Range, 1 - 50
AU361182657213en-002101 / 130R0338