Danfoss VLT AutomationDrive FC 300 Programming Guide

3.9 Parameters: Controllers
3.9.1 7-** Controllers
Parameter group for configuring application controls.
3.9.2 7-0* Speed PID Ctrl.
Parameters for configuring the speed PID control.
7-00 Speed PID Feedback Source
Option: Function:
Select the encoder for closed loop feedback.
The feedback may come from a different encoder (typically mounted on the application itself) than
the motor mounted encoder feedback selected in par. 1-02
Flux Motor Feedback Source .
This parameter cannot be adjusted while the motor is running.
[0] * Motor feedb. P1-02
[1] 24V encoder
[2] MCB 102
[3] MCB 103
[5] MCO Encoder 2
[6] Analog input 53
[7] Analog input 54
[8] Frequency input 29
[9] Frequency input 33
NB!
If separate encoders are used (FC 302 only) the ramp settings parameters in the following groups: 3-4*, 3-5*, 3-6*, 3-7* and 3-8*
must be adjusted according to the gear ratio between the two encoders.
7-02 Speed PID Proportional Gain
Range: Function:
Application
dependent*
[0.000 - 1.000 ] Enter the speed controller proportional gain. The proportional gain amplifies the error (i.e. the de-
viation between the feedback signal and the set-point). This parameter is used with
par. 1-00
Configuration Mode Speed open loop [0] and Speed closed loop [1] control. Quick control
is obtained at high amplification. However if the amplification is too great, the process may become
unstable.
Use this parameter for values with three decimals. For a selection with four decimals, use
par. 3-83
Quick Stop S-ramp Ratio at Decel. Start .
7-03 Speed PID Integral Time
Range: Function:
Application
dependent*
[2.0 - 20000.0 ms] 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,
leading to major deviations from the required reference, since the process regulator takes too long
to regulate errors. This parameter is used with
Speed open loop [0] and Speed closed loop [1]
control, set in par. 1-00
Configuration Mode .
3 Parameter descriptions FC 300 Programming Guide
128 MG.33.M8.02 - VLT
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Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English