Parameter 7-32 Process PID Start Speed
Table 387: Parameter 7-32 Process PID Start Speed
7-32 Process PID Start Speed
Default value: 0 RPM
Parameter type: Range, 0 - 6000 RPM
Setup: All setups
Conversion index: 67
Data type: Uint16
Change during operation: True
Enter the motor speed to be attained as a start signal for commencement of PID control. When the power is switched on, the drive
starts to ramp and then operates under speed open-loop control. When the process PID start speed is reached, the drive changes to
process PID control.
Parameter 7-33 Process PID Proportional Gain
Table 388: Parameter 7-33 Process PID Proportional Gain
7-33 Process PID Proportional Gain
Default value: 0.10
Parameter type: Range, 0 - 10
Setup: All setups
Conversion index: -2
Data type: Uint16
Change during operation: True
Enter the PID proportional gain. The proportional gain multiplies the error between the setpoint and the feedback signal.
Parameter 7-34 Process PID Integral Time
Table 389: Parameter 7-34 Process PID Integral Time
7-34 Process PID Integral Time
Default value: 10000 s
Parameter type: Range, 0.01 - 10000 s
Setup: All setups
Conversion index: -2
Data type: Uint32
Change during operation: True
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.
Parameter 7-35 Process PID Differentiation Time
Table 390: Parameter 7-35 Process PID Differentiation Time
7-35 Process PID Differentiation Time
Default value: 0 s
Parameter type: Range, 0 - 10 s
Setup: All setups
Conversion index: -2
Data type: Uint16
Change during operation: True
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.
Parameter 7-36 Process PID Diff. Gain Limit
Table 391: Parameter 7-36 Process PID Diff. Gain Limit
7-36 Process PID Diff. Gain Limit
Default value: 5
Parameter type: Range, 1 - 50
Setup: All setups
Conversion index: -1
Data type: Uint16
Change during operation: True
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.
AU373327181955en-000101 / 130R1208
198 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
