Danfoss FC 300 Design Guide

FC 300 Design Guide
How to Program
" Parameters: Controllers
" 7-** Controller s
Parameter group for configuring application controls.
" 7-0* Speed PID Ctrl.
Parameters for configuring the speed PID control.
7-00 Speed PID Feedback Source
Option:
*
Motor feedb. P1-02 (FC 302 only) [0]
24V encoder [1]
MCB 102 [2]
MCO 305 [3]
Function:
Select the encoder for closed loop feedback.
The feedback may come from a different encoder
(typically mo unted on the application itself)
than the motor mounted encoder feedback
selected in par. 1-02.
This parameter cannot be adjusted while
the motor is running.
NOTE
If separate encoders a re used (FC 30 2
only) to 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 Pr o port ion alGain
Range:
0.000 - 1.000
*
0.015
Function:
Enter the speed controller proportional gain.
The proportional gain amplifies the error (i.e.,
the deviation betwee n the feedback sign al and
the set-point). This parameter is used with par.
1-00 Speed open-loop [0] and Spe ed closed-loop
[1] control. Quick control is obtained a
thigh
amplification. However if the amplification is too
great, the process may become unstable.
7-03 Speed PID Integral Time
Range:
2.0 - 2000 0.0 ms
*
8.0 ms
Function:
Enter the spee d controller integral time, wh ich
determines the time the internal PID control takes
to correct errors. The gre ater the error, the more
quickly the gain increas es. The integral time causes
a delay of the signal and therefore a damping effect,
and can be used to eliminate steady state sp eed
error. Obtain quick control throug h 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.
7-04 Speed PID Differentiation Time
Range:
0.0 - 200.0 ms
*
30.0 ms
Function:
Enter the speed controller differentiation time. The
differentiator does not react to constant error. It
provides gain proportional to the rate of change of
the speed feedback. The quicker the error changes,
the stronger the gain from the differentiator. The
gain is proportional with the speed at which errors
change. Setting this parameter to zero disables
the differentiator. This parameter is used with
par. 1-00 Spee d closed-loop [1] control.
7-05 Speed PID Diff Gain Limit
Range:
1.000 - 2 0.000
*
5.000
Function:
Set a limit for the gain provided by the differentiator.
Since the differential gain increases at higher
frequencies, limiting the gain may be us
eful.
For example, set up a pure D-link a t low
frequencies and a constant D-link at higher
frequencies. This parameter is u
sed with par.
1-00 Speed closed loop [1] control.
7-06 Speed PID Lowpass Filter Time
Range:
1.0 - 100.0 ms
*
10.0ms
*
default setting ()display text []value for use in communication via serial communication port
208
MG.33.B
6.22 - V LT is a registered Danfoss trademark

Danfoss FC 300 Specifications

General

Brand	Danfoss
Model	FC 300
Category	DC Drives
Language	English