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
Parameter type: Range, 1.0 - 20000.0 ms
Setup: All setups
Conversion index: -4
Data type: Uint32
Change during operation: True
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
Parameter type: Range, 0.1 - 100.0 ms
Setup: All setups
Conversion index: -4
Data type: Uint16
Change during operation: True
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
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
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
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
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
.
AU373327181955en-000101 / 130R1208 | 107
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
