Parameter Group 3-** Reference/Ramps; Reference Limits - Danfoss VLT AutomationDrive EZ FC 321 Programming Manual

VLT® AutomationDrive EZ FC 321
Programming Guide
Parameter 2-32 Speed PID Start Integral Time
Table 174: Parameter 2-32 Speed PID Start Integral Time
2-32 Speed PID Start Integral Time
Default value: 200.0 ms
Conversion index: -4
Enter the speed controller integral time. Obtain quick control through a short integral time, though if the integral time is too short,
the process becomes unstable. An excessively long integral time disables the integral action.
Parameter 2-33 Speed PID Start Lowpass Filter Time
Table 175: Parameter 2-33 Speed PID Start Lowpass Filter Time
2-33 Speed PID Start Lowpass Filter Time
Default value: 10.0 ms
Conversion index: -4
Set a time constant for the speed control low-pass filter. The low-pass filter improves steady-state performance and dampens oscil-
lations on the feedback signal. However, severe filtering can be detrimental to dynamic performance.

4.4 Parameter Group 3-** Reference/Ramps

Parameters for handling of reference, definition of limitations, and configuration of the reaction of the drive to changes.

4.4.1 3-0* Reference Limits

Parameter 3-00 Reference Range
Table 176: Parameter 3-00 Reference Range
3-00 Reference Range
Default value: Size related
Conversion index: –
Select the range of the reference signal and the feedback signal. Signal values can be positive only, or positive and negative. The
minimum limit may have a negative value, unless [1] Speed closed loop control or [3] Process is selected in parameter 1-00 Configura-
tion Mode.
Option Name Description
[0] Min - Max Select the range of the reference signal and the feedback signal. Signal values can be positive only, or
positive and negative. The minimum limit may have a negative value, unless [1] Speed closed loop control
or [3] Process is selected in parameter 1-00 Configuration Mode.
[1] -Max - +Max For both positive and negative values (both directions, relative to parameter 4-10 Motor Speed Direction).
Parameter 3-01 Reference/Feedback Unit
Table 177: Parameter 3-01 Reference/Feedback Unit
3-01 Reference/Feedback Unit
Default value: Size related
Conversion index: –
Select the unit to be used in process PID control references and feedbacks. Parameter 1-00 Configuration Mode must be either [3]
Process or [8] Extended PID Control.
Danfoss A/S © 2021.08
Parameter type: Range, 1.0 - 20000.0 ms
Data type: Uint32
Parameter type: Range, 0.1 - 100.0 ms
Data type: Uint16
Parameter type: Option
Data type: Uint8
Parameter type: Option
Data type: Uint8
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
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