Danfoss VLT AutomationDrive FC 300 Design Manual page 178

FC 300 Design Guide
7-2* Process Ctrl. Feedb.
"
Select which resources should be used for
feedback to the Process PID Control and how
this feedback should be handled.
7-20 Process CL Feedback 1 Resource
Option:
*
No function
Analog input 53
Analog input 54
Frequency input 29 (FC 302 only)
Frequency input 33
Function:
It is possible to add up to two different feedback
signals to compose the actual feedback. This
parameter defines which input on the frequency
converter should be treated as the source
of the first feedback signal.
7-22 Process CL Feedback 2 Resource
Option:
*
No function
Analog input 53
Analog input 54
Frequency input 29 (FC 302 only)
Frequency input 33
Function:
It is possible to add up to two different feedback
signals to compose the actual feedback. This
parameter defines which input on the frequency
converter should be treated as the source
of the first feedback signal.
7-3* Process PID Ctrl.
"
Parameters for configuring the Process PID control.
7-30 Process PID Normal/ Inverse Control
Option:
*
Normal
Inverse
Function:
It is possible to choose whether the process
control is to increase/reduce the output frequency.
This is done by having a difference between the
reference signal and the feedback signal.
7-31 Process PID Anti Windup
Option:
*
Off
On
default setting ( )
*
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How to Programme
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MG.33.B4.02 - VLT is a registered Danfoss trademark
Function:
It is possible to select whether the process control
is to continue regulating on an error even if it is not
possible to increase/reduce the output frequency.
7-32 Process PID Start Speed
Range:
0 - 6000 RPM
Function:
When the start signal is given the frequency
converter will react with a Speed control,
open loop following the ramp. Only when the
programmed start speed has been obtained it
will change to Process control.
7-33 Process PID Proportional Gain
Range:
0.00 - 10.00 N/A
Function:
The proportional gain indicates the number of
times the error between the set point and the
feedback signal is to be applied.
7-34 Process PID Integral Time
Range:
0.01 - 10000.00
Function:
The integrator provides an increasing gain
at a constant error between the set point
and the feedback signal. The integral time
needed by the integrator to reach the same
gain as the proportional gain.
7-35 Process PID Differentiation Time
Range:
0.00 - 10.00 s
Function:
The differentiator does not react to a constant
error. It only provides a gain when the error
changes. The quicker the error changes, the
stronger the gain from the differentiator.
7-36 Process PID Diff. Gain Limit
Range:
1.0 - 50.0 N/A
Function:
Set a limit for the differentiator gain (DG). The
DG will increase if there are fast changes. Limit
the DG to obtain a pure differentiator gain
*
0RPM
*
0.01N/A
*
10000.00s
*
0.00s
*
5.0N/A