Danfoss VLT AutomationDrive FC 300 Design Manual page 37

Introduction
Parameter
5-54 Pulse Filter Time Constant #29 (Pulse
term. 29), 5-59 Pulse Filter Time Constant #33
(Pulse term. 33), 6-16 Terminal 53 Filter Time
Constant (Analog term 53), 6-26 Terminal 54
Filter Time Constant (Analog term. 54)
Table 3.8 Relevant Parameters for Process Control
Function
Initialise the frequency converter
1) Set motor parameters:
Set the motor parameters according to name plate
data
Perform a full Automation Motor Adaptation
2) Check that motor is running in the right direction.
When motor is connected to frequency converter with straight forward phase order as U - U; V- V; W - W motor shaft usually turns
clockwise seen into shaft end.
Press [Hand On" ]. Check shaft direction by
applying a manual reference.
If motor turns opposite of required direction:
1. Change motor direction in 4-10 Motor Speed
Direction
2. Turn off mains - wait for DC link to discharge -
switch two of the motor phases
Set configuration mode
Set Local Mode Configuration
3) Set reference configuration, ie. the range for reference handling. Set scaling of analog input in parameter 6-xx
Set reference/feedback units
Set min. reference (10 °C)
Set max. reference (80 °C)
If set value is determined from a preset value
(array parameter), set other reference sources to
No Function
4) Adjust limits for the frequency converter:
Set ramp times to an appropriate value as 20 s
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VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
Description of function
If there are oscillations of the current/voltage feedback signal, these can be dampened by
means of a low-pass filter. This time constant represents the speed limit of the ripples
occurring on the feedback signal.
Example: If the low-pass filter has been set to 0.1s, the limit speed will be 10 RAD/s (the
reciprocal of 0.1 s), corresponding to (10/(2 x π)) = 1.6 Hz. This means that all currents/
voltages that vary by more than 1.6 oscillations per second will be damped by the filter.
The control will only be carried out on a feedback signal that varies by a frequency
(speed) of less than 1.6 Hz.
The low-pass filter improves steady state performance but selecting a too large filter time
will deteriorate the dynamic performance of the Process PID Control.
Parameter Setting
14-22 Operation [2] Initialisation - make a power cycling - press reset
Mode
1-2* As stated on motor name plate
1-29 Automatic [1] Enable complete AMA
Motor
Adaptation
(AMA)
4-10 Motor Select correct motor shaft direction
Speed Direction
1-00 Configu- [3] Process
ration Mode
1-05 Local [0] Speed Open Loop
Mode Configu-
ration
[60] °C Unit shown on display
3-01 Reference/
Feedback Unit 10 °C
3-02 Minimum 80 °C
Reference
[0] 35%
3-03 Maximum
Ref =
Reference
3-14 Preset Relative Reference to 3-18 Relative Scaling Reference
3-10 Preset
Resource [0] = No Function
Reference
3-41 Ramp 1 20 s
Ramp Up Time 20 s
3-42 Ramp 1
Ramp Down
Time
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MG33BE02 - VLT is a registered Danfoss trademark
Par . 3 − 10 ( 0 )
× (( Par . 3 − 03 ) − ( par . 3 − 02 )) = 24, 5° C
100
3 3
35