Speed Pid Proportional Gain; Speed Pid Integral Time - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions
3 3
External Set-point
Illustration 3.48 Speed Trim
Illustration 3.48 shows a single source set-up where the
master sends the torque signal to all followers. The
number of available analog outputs on the master limits
this set-up. To overcome the limitation of the number of
analog outputs, use a cascade principle. The cascade
principle makes the control slower and less accurate
compared with the set-up using analog outputs.
7-01 Speed PID Droop
The droop function allows the frequency converter to decrease
the motor speed proportional to the load. The droop value is
directly proportional to the load value. Use the droop function
when several motors are mechanically connected and the load
on motors can differ.
Ensure that parameter 1-62 Slip Compensation has a default
setting.
Range:
0 RPM
*

7-02 Speed PID Proportional Gain

Range:
Size [0 -
related 1 ]
*
146
VLT
VLT 1
Set-point
Calculation
VLT 2
Set-point
Calculation
VLT 3
Set-point
Calculation
Function:
[0 - 200 RPM] Enter the droop value at
100% load.
Function:
Enter the speed controller proportional gain.
The proportional gain amplifies the error (that
is the deviation between the feedback signal
Danfoss A/S © 10/2018 All rights reserved.
®
AutomationDrive FC 301/302
Speed
Ramp
PID
Speed
Ramp
-
PID
Droop
Speed
Ramp -
PID
Droop
7-02 Speed PID Proportional Gain
Range:

7-03 Speed PID Integral Time

Range:
Size
related 20000
*
ms]
Torque
PID
Torque
PID
Torque
PID
Function:
and the setpoint). This parameter is used with
parameter 1-00 Configuration Mode [0] Speed
open loop and [1] Speed closed loop control.
Quick control is obtained at high amplification.
Increasing amplification makes the process less
stable.
For values with 4 decimals, use
parameter 30-83 Speed PID Proportional Gain.
Function:
[1.0 - Enter the speed controller integral time,
which determines the time the internal PID
control takes to correct errors. The greater
the error, the more quickly the gain
increases. The integral time causes a delay
of the signal and therefore a dampening
effect and can be used to eliminate steady-
state speed error. 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,
M1
M2
M3
MG33MP02