Danfoss VLT Series Design Manual page 40

2. Introduction to the VLT HVAC Drive
2.8.4. Programming Order
Function
1) Make sure the motor runs properly. Do the following:
2
Set the drive to control the motor based on
drive output frequency.
Set the motor parameters using nameplate
data.
Run Automatic Motor Adaptation.
2) Make sure that the motor is running in the right direction.
Press the "Hand On" LCP key and the ^ key
to make the motor turn slowly. Make sure
that the motor runs in the correct direction.
3) Make sure the adjustable frequency drive limits are set to safe values.
Make sure that the ramp settings are within
the capabilities of the drive and the allowed
application operating specifications.
Prohibit the motor from reversing (if nec-
essary)
Set acceptable limits for the motor speed. 4-12
Switch from open-loop to closed-loop.
4) Configure the feedback to the PID controller.
Set up Analog Input 54 as a feedback input. 20-00
Select the appropriate reference/feedback
unit.
5) Configure the setpoint reference for the PID controller.
Set acceptable limits for the setpoint refer-
ence.
Set up Analog Input 53 as Reference 1
Source.
6) Scale the analog inputs used for setpoint reference and feedback.
Scale Analog Input 53 for the temperature
range of the potentiometer (23°-95° F
[-5°-+35° C], 0-10 V).
Scale Analog Input 54 for the temperature
range of the temperature sensor (-14° -
+104° F [-10° - +40° C], 4-20 mA)
7) Tune the PID controller parameters.
Select inverse control, because the motor's
speed should increase when the feedback
is greater than the setpoint reference.
Adjust the drive's closed-loop controller, if
needed.
8) Finished!
Save the parameter settings to the LCP for
safekeeping.
40
Par. no. Setting
Hz
0-02
1-2* As specified by motor nameplate
Enable complete AMA
1-29
AMA function.
If the motor runs in the wrong direction,
remove power temporarily and reverse
two of the motor phases.
3-41 60 sec.
3-42 60 sec.
Depends on motor/load size!
Also active in hand mode.
Clockwise
4-10
10 Hz
4-14 50 Hz
4-19 50 Hz
Closed-loop
1-00
Analog input 54
°C
20-12
3-02 23° F [-5° C]
3-03 95° F [35° C]
Analog input 53
3-15
6-10 0 V
6-11 10 V (default)
6-14 23° F [-5° C]
6-15 95° F [35° C]
6-22 4 mA
6-23 20 mA (default)
6-24 14° F [-10° C]
6-25 104° F [40° C]
20-81 Inverse
20-93 See Optimization of the PID Controller be-
20-94 low.
All to LCP
0-50
MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
VLT ® HVAC Drive Design Guide
[1]
[1] and then run the
[0]
[3]
[2] (default)
[60]
[1] (default)
[1]
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