Danfoss VLT 380-500 V Design Manual page 146

PID Controls
The speed PID monitors the actual RPM of the motor by
using a 24 V (HTL) incremental encoder as feedback. The
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 Table 16.3
it is assumed that all other parameters and switches remain at their default settings.
Function
1) To ensure that the motor runs properly, peform the following:
Set the motor parameters according to the nameplate
data.
Perform automatic motor adaptation (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).
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
16 16
value in parameter 16-20 Motor Angle is increasing or
decreasing.
If parameter 16-20 Motor Angle is decreasing, then
change the encoder direction in parameter 5-71 Term
32/33 Encoder Direction.
3) Make sure that the frequency converter limits are set to safe values.
Set acceptable limits for the references.
144
®
VLT Parallel Drive Modules
L1
L2
L3
N
PE
F1
12
91 92 93 95
37
L1 L2 L3 PE
18
50
53
55
39
20
U V W PE
32
33
96 97 98 99
M
24 Vdc
3
Parameter number
Parameter group 1-2* Motor
Data
Parameter 1-29 Automatic
Motor Adaptation (AMA)
Parameter 16-20 Motor
Angle
Parameter 5-71 Term 32/33
Encoder Direction
Parameter 3-02 Minimum
Reference
Parameter 3-03 Maximum
Reference
Danfoss A/S © 6/2016 All rights reserved.
feedback sensor is an encoder (1024 pulses per revolution)
connected to terminals 32 and 33.
Setting
As specified by motor nameplate
[1] Enable complete AMA
Set a positive reference.
N.A. Read-only parameter.
Note: An increasing value overflows at 65535 and
starts again at 0.
[1] Counterclockwise (if parameter 16-20 Motor
Angle is decreasing)
0 RPM (default)
1500 RPM (default)
MG37N102