Danfoss VLT Midi Drive FC 280

Set acceptable limits for the motor speed and frequency. Parameter 4-12 Motor
Speed Low Limit [Hz]
0 Hz
Parameter 4-14 Motor
Speed High Limit [Hz]
50 Hz
Parameter 4-19 Max
Output Frequency
60 Hz
4) Congure the speed control and select the motor control principle:
Activation of speed control Parameter 1-00 Congu-
ration Mode
[1] Speed closed loop
Selection of motor control principle Parameter 1-01 Motor
Control Principle
[1] VVC
+
5) Congure and scale the reference to the speed control:
Set up analog input 53 as a reference source. Parameter 3-15 Reference 1
Source
Not necessary (default)
Scale analog input 53 0 Hz (0 V) to 50 Hz (10 V) 6-1* Analog Input 1 Not necessary (default)
6) Congure the 24 V HTL encoder signal as feedback for the motor control and the speed control:
Set up digital input 32 and 33 as encoder inputs. Parameter 5-14 Terminal
32 Digital Input
[82] Encoder input B
Parameter 5-15 Terminal
33 Digital Input
[83] Encoder input A
Select terminal 32/33 as speed PID feedback. Parameter 7-00 Speed PID
Feedback Source
[1] 24 V Encoder
7) Tune the speed control PID parameters:
Use the tuning guidelines when relevant or tune manually. 7-0* Speed PID Ctrl.
8) Finish:
Save the parameter setting to the LCP for safe keeping. Parameter 0-50 LCP Copy [1] All to LCP
Table 2.7 Programming Order for Speed PID Control
Product Overview Design Guide
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