Danfoss VLT AutomationDrive FC 301 Programming Manual page 130

Parameter Descriptions
7-52 Process PID Feed Fwd Ramp up
Range:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed-forward
*
3 3
7-53 Process PID Feed Fwd Ramp down
Range:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed-forward
*
7-56 Process PID Ref. Filter Time
Range:
0.001 s [0.001 - 1
*
s]
7-57 Process PID Fb. Filter Time
Range:
0.001 s [0.001 - 1
*
s]
3.9.8 7-9* Position PI Ctrl.
Parameters for configuring the position controller.
7-90 Position PI Feedback Source
Select the feedback source for the position PI controller.
Option:
[0] Motor
*
feedb. P1-02
[1] 24V
encoder
[2] MCB 102
[3] MCB 103
128
®
VLT
Function:
signal when ramping up.
Function:
signal when ramping down.
Function:
Set a time constant for the reference first-
order low-pass filter. The low-pass filter
improves steady-state performance and
dampens oscillations on the reference/
feedback signals. However, severe filtering
can be detrimental to dynamic
performance.
Function:
Set a time constant for the feedback first-
order low-pass filter. The low-pass filter
improves steady-state performance and
dampens oscillations on the reference/
feedback signals. However, severe filtering
can be detrimental to dynamic
performance.
Function:
Use the feedback source selected as motor
feedback in parameter 1-02 Flux Motor
Feedback Source. In flux sensorless control
principle the estimated position from motor
control is used.
A 24 V encoder connected to terminals 32,
33.
NOTICE
Set parameter 5-14 Terminal 32 Digital
Input and parameter 5-15 Terminal 33
Digital Input to [0] No operation.
Encoder connected to an encoder option (B-
option slot). Configure the encoder in
parameter group 17-1* Inc. Enc. Interface.
Resolver connected to resolver option (B-
option slot). Configure the resolver in
parameter group 17-5* Resolver Interface.
Danfoss A/S © 02/2016 All rights reserved.
AutomationDrive FC 301/302
7-92 Position PI Proportional Gain
Enter the proportional gain for the position PI controller.
Increasing the gain value makes the control more dynamic but
less stable. 0=Off.
Range:
0.0150
*
7-93 Position PI Integral Time
Enter the integral time for the position PI controller. Decreasing
the value makes the control more dynamic but less stable.
20000=Off.
Range:
20000.0 ms
*
7-94 Position PI Feedback Scale Numerator
This parameter is the numerator in the equation which defines
the gear ratio between the motor and the feedback device when
the feedback device is not mounted on the motor shaft.
Encoder revolutions =
Range:
1
*
7-95 Position PI Feebback Scale Denominator
See parameter 7-94 Position PI Feedback Scale Numerator.
Range:
1 [-2000000000 - 2000000000]
*
7-97 Position PI Maximum Speed Above Master
Enter the value by which the follower speed is allowed to exceed
the actual master speed. Valid only in synchronization mode.
Range:
100 RPM
*
7-98 Position PI Feed Forward Factor
Enter the amount by which the speed reference calculated by
the profile generator is allowed to bypass the position PI
controller.
Range:
98 %
*
7-99 Position PI Minimum Ramp Time
Enter the shortest ramp time for the output of the Position PI
controller. Use this parameter to limit acceleration when
correcting large position deviations, for example, when starting
synchronization with a running master or after recovering from
an overload situation during positioning.
Range:
0.01 s
*
Function:
[0.0000 - 1.0000]
Function:
[1.0 - 20000.0 ms]
Par . 7 − 94
× Motor revolutions
Par . 7 − 95
Function:
[-2000000000 -
2000000000]
Function:
[0 - 1500 RPM]
Function:
[0 - 110 %]
Function:
[0.000 - 3600 s]
Function:
MG33ML02