Danfoss VLT AutomationDrive FC 301 Programming Guide

Parameter 7-51 Process PID Feed Fwd Gain
Table 481: Parameter 7-51 Process PID Feed Fwd Gain
7-51 Process PID Feed Fwd Gain
Default value: 1
Parameter type: Range, 0 - 100
Setup: All setups
Conversion index: -2
Data type: Uint16
Change during operation: True
The feed forward is used to obtain the required level based on a well-known signal available. The PID controller then only takes care
of the smaller part of the control, necessary because of unknown characters. The standard feed-forward 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 op-
tions. In winder applications, the feed-forward factor is typically the line speed of the system.
Parameter 7-52 Process PID Feed Fwd Ramp Up
Table 482: Parameter 7-52 Process PID Feed Fwd Ramp Up
7-52 Process PID Feed Fwd Ramp Up
Default value: 0.01 s
Parameter type: Range, 0.01 - 10 s
Setup: All setups
Conversion index: -2
Data type: Uint32
Change during operation: True
Controls the dynamics of the feed-forward signal when ramping up.
Parameter 7-53 Process PID Feed Fwd Ramp Down
Table 483: Parameter 7-53 Process PID Feed Fwd Ramp Down
7-53 Process PID Feed Fwd Ramp Down
Default value: 0.01 s
Parameter type: Range, 0.01 - 10 s
Setup: All setups
Conversion index: -2
Data type: Uint32
Change during operation: True
Controls the dynamics of the feed-forward signal when ramping down.
Parameter 7-56 Process PID Ref. Filter Time
Table 484: Parameter 7-56 Process PID Ref. Filter Time
7-56 Process PID Ref. Filter Time
Default value: 0.001 s
Parameter type: Range, 0.001 - 1 s
Setup: All setups
Conversion index: -3
Data type: Uint16
Change during operation: True
Set a time constant for the reference first-order low-pass filter. The low-pass filter improves steady-state performance and dampens
oscillations on the reference/feedback signals. However, severe filtering can be detrimental to dynamic performance.
Parameter 7-57 Process PID Fb. Filter Time
Table 485: Parameter 7-57 Process PID Fb. Filter Time
7-57 Process PID Fb. Filter Time
Default value: 0.001 s
Parameter type: Range, 0.001 - 1 s
Setup: All setups
Conversion index: -3
Data type: Uint16
Change during operation: True
Set a time constant for the feedback first-order low-pass filter. The low-pass filter improves steady-state performance and dampens
oscillations on the reference/ feedback signals. However, severe filtering can be detrimental to dynamic performance.
AU275636650261en-000101 / 130R0334 | 267Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT AutomationDrive FC 301 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 301
Category	DC Drives
Language	English