Ext. Process Pid Ctrl - Danfoss VLT AutomationDrive FC 360 Programming Manual

Parameter Descriptions
7-41 Process PID Output Neg. Clamp
Range:
-100 % [ -100 - 100 %] Enter a negative limit for the process
*
7-42 Process PID Output Pos. Clamp
Range:
100 % [ -100 - 100 %] Enter a positive limit for the process
*
4 4
7-43 Process PID Gain Scale at Min. Ref.
Range:
100 % [0 -
*
100 %]
7-44 Process PID Gain Scale at Max. Ref.
Range:
100 % [0 -
*
100 %]
7-45 Process PID Feed Fwd Resource
Option:
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[7] Frequency input 29
[8] Frequency input 33
[11] Local bus reference
[32] Bus PCD
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[0] Normal Select [0] Normal to set the feed forward factor to
*
[1] Inverse Select [1] Inverse to treat the FF resource as a
68
Function:
PID controller output.
Function:
PID controller output.
Function:
Enter a scaling percentage to apply to the
process PID output when operating at the
minimum reference. The scaling percentage is
adjusted linearly between the scale at min. ref.
(parameter 7-43 Process PID Gain Scale at Min.
Ref.) and the scale at max. ref.
(parameter 7-44 Process PID Gain Scale at Max.
Ref.).
Function:
Enter a scaling percentage to apply to the
process PID output when operating at the
maximum reference. The scaling percentage is
adjusted linearly between the scale at min. ref.
(parameter 7-43 Process PID Gain Scale at Min.
Ref.) and the scale at max. ref.
(parameter 7-44 Process PID Gain Scale at Max.
Ref.).
Function:
Select which frequency converter input
should be used as the feed forward
factor. The FF factor is added directly
to the output of the PID controller.
This increases dynamic performance.
Function:
treat the FF resource as a positive value.
negative value.
Danfoss A/S © Rev. 2014-03-31 All rights reserved.
Programming Guide
7-48 PCD Feed Forward
Range:
0
*
7-49 Process PID Output Normal/ Inv. Ctrl.
Option:
[0] Normal Select [0] Normal to use the resulting output from
*
[1] Inverse Select [1] Inverse to invert the resulting output

4.8.6 7-5* Ext. Process PID Ctrl.

This parameter group is only used if 1-00 Configuration
Mode is set to [7] Extended PID speed CL.
7-50 Process PID Extended PID
Option:
[0] Disabled Disables the extended parts of the process PID
[1] Enabled Enables the extended parts of the PID controller.
*
7-51 Process PID Feed Fwd Gain
Range:
1 [0 -
*
100 ]
7-52 Process PID Feed Fwd Ramp up
Range:
0.01 s
*
7-53 Process PID Feed Fwd Ramp down
Range:
0.01 s
*
7-56 Process PID Ref. Filter Time
Range:
0.001 s
*
Function:
[0 - 65535 ]
Function:
the process PID controller as is.
from the process PID controller. This operation is
performed after the feed forward factor is applied.
Function:
controller.
Function:
The feed forward is used to obtain the desired level,
based on a well-known signal available. The PID
controller then only takes care of the smaler part of
the control, necessary because of unknown
characters. The standard feed fwd factor in
parameter 7-38 Process PID Feed Forward Factor is
always related to the reference whereas
parameter 7-51 Process PID Feed Fwd Gain has more
choices. In winder applications, the feed fwd factor is
typically the line speed of the system.
Function:
[0.01 - 100 s] Controls dynamics of the feed forward
signal when ramping up.
Function:
[0.01 - 100 s] Controls the dynamics of the feed
forward signal when ramping down.
Function:
[0.001 - 1 Set a time constant for the reference
s] first-order low-pass filter. The low-pass
filter improves steady-state performance
and dampens oscillations on the
reference/feedback signals. However,
MG06C402