The speed PID monitors the actual RPM of the motor by
using a 24 V (HTL) incremental encoder as feedback. The
feedback sensor is an encoder (1024 pulses per revolution)
connected to terminals 32 and 33.
M
3
96 97
99
98
91 92 93 95
50
12
L1 L2
L1
PE
L3
W PE
V
U
F1
L2
L3
N
PE
18
53
37
55
20
32
33
39
24 Vdc
130BA174.10
Illustration 16.1 Speed Control Connections
16.1.3 Speed PID Control Programming Order
The following must be programmed in the order shown (see explanation of settings in the
programming guide
). In
it is assumed that all other parameters and switches remain at their default settings.
Function
Parameter number
Setting
1) To ensure that the motor runs properly, peform the following:
Set the motor parameters according to the nameplate
data.
Parameter group 1-2* Motor
Data
As specified by motor nameplate
Perform automatic motor adaptation (AMA).
Parameter 1-29 Automatic
Motor Adaptation (AMA)
[1] Enable complete
AMA
2) Check that the motor is running and that the encoder is attached properly. Do the following:
Press [Hand On]. Check that the motor is running and
note in which direction it is turning (positive direction).
Set a
positive
reference.
Go to
parameter 16-20 Motor Angle
. Turn the motor
slowly in the positive direction. It must be turned so
slowly (only a few RPM) that it can be determined if the
value in
parameter 16-20 Motor Angle
is increasing or
decreasing.
Parameter 16-20 Motor
Angle
N.A. Read-only parameter.
Note: An increasing value overflows at 65535 and
starts again at 0.
If
parameter 16-20 Motor Angle
is decreasing, then
change the encoder direction in
parameter 5-71 Term
32/33 Encoder Direction
.
Parameter 5-71 Term 32/33
Encoder Direction
[1] Counterclockwise
(if
parameter 16-20 Motor
Angle
is decreasing)
3) Make sure that the frequency converter limits are set to safe values.
Set acceptable limits for the references.
Parameter 3-02 Minimum
Reference
0 RPM (default)
Parameter 3-03 Maximum
Reference
1500 RPM (default)
PID Controls
VLT
®
Parallel Drive Modules
144
Danfoss A/S © 6/2016 All rights reserved.
MG37N102
16
16
Summary of Contents for VLT 380-500 V
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