Danfoss VLT AQUA Programming Manual page 191

®
VLT AQUA Drive Programming Guide
21-18 Ext. 1 Feedback [Unit]
Range:
0.000
ExtPID1
*
Unit
21-19 Ext. 1 Output [%]
Range:
*
0 %
2.18.4. 21-2* Closed Loop 1 PID
Configure the Closed Loop 1 PID controller.
21-20 Ext. 1 Normal/Inverse Control
Option:
*
[0]
[1]
21-21 Ext. 1 Proportional Gain
Range:
*
0.01
21-22 Ext. 1 Integral Time
Range:
10000.0
*
0 s
21-23 Ext. 1 Differentiation Time
Range:
0.00 s
21-24 Ext. 1 Diff. Gain Limit
Range:
*
5.0
Function:
[-999999.999 - Readout of the feedback value for the Closed Loop 1 Controller.
999999.999
ExtPID1Unit]
Function:
[0 - 100%] Readout of the output value for the Closed Loop 1 Controller.
Function:
Normal
Inverse Select
back is higher than the reference.
Select
back is higher than the reference.
Function:
[0.00 = Off - 10.00] The proportional gain indicates the number of times the error
between the set point and the feedback signal is to be applied.
Function:
[0.01 - 10000.00 = The integrator provides an increasing gain at a constant error
Off s] between the setpoint and the feedback signal. The integral time
is the time needed by the integrator to reach the same gain as
the proportional gain.
Function:
* [0.00 = Off - 10.00 s] 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.
Function:
[1.0 - 50.0] Set a limit for the differentiator gain (DG). The DG will increase
if there are fast changes. Limit the DG to obtain a pure differ-
entiator gain at slow changes and a constant differentiator gain
where quick changes occur.
®
MG.20.O2.02 - VLT is a registered Danfoss trademark
Normal
[0] if the output should be reduced when feed-
Inverse
[1] if the output should be increased when feed-
2. Parameter Description
191
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