Danfoss VLT AutomationDrive FC 301 Programming Manual page 307

Programming Guide | VLT® AutomationDrive FC 301/FC 302
7-34 Process PID Integral Time
Default value: 10000 s
Setup: All setups
Data type: Uint32
Enter the PID integral time. The integrator provides an increasing gain at a constant error between the setpoint and the feedback signal.
The integral time is the time needed by the integrator to reach the same gain as the proportional gain.
7-35 Process PID Differentiation Time
Default value:
0 s
Setup: All setups
Data type:
Uint16
Enter the PID differentiation time. The differentiator does not react to a constant error, but provides a gain only when the error changes.
The shorter the PID differentiation time, the stronger the gain from the differentiator.
7-36 Process PID Diff. Gain Limit
Default value: 5
Setup: All setups
Data type: Uint16
Enter a limit for the differentiator gain. If there is no limit, the differentiator gain increases when there are fast changes. To obtain a pure
differentiator gain at slow changes and a constant differentiator gain where fast changes occur, limit the differentiator gain.
7-38 Process PID Feed Forward Factor
Default value: 0%
Setup:
All setups
Data type: Uint16
Enter the PID feed-forward factor. The factor sends a constant fraction of the reference signal to bypass the PID control, so the PID control
only affects the remaining fraction of the control signal. Any change to this parameter affects the motor speed. When the feed-forward
factor is activated, it provides less overshoot and high dynamics when changing the setpoint. Parameter 7-38 Process PID Feed Forward
Factor is active when parameter 1-00 Configuration Mode is set to [3] Process.
7-39 On Reference Bandwidth
Default value: 5%
Setup:
All setups
Data type: Uint8
Enter the on-reference bandwidth. When the PID control error (the difference between the reference and the feedback) is less than the
value of this parameter, the on-reference status bit is 1.
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AU275636650261en-003201 / 130R0334 |
Parameter Descriptions
Range, 0.01 - 10000 s
-2
True
Range, 0 - 10 s
-2
True
Range, 1 - 50
-1
True
Range, 0 - 200%
0
True
Range, 0 - 200%
0
True
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