Issue 10/06

6 Commissioning

6.4.17.2

P1300=21

P1442 = ...

P1460 = ...

P1462 = ...

Vector control with encoder (VC)

¾First step: Parameterizing the speed encoder (refer to Section 6.4.15)

¾When commissioning Vector Control with encoder-feedback (VC), the drive should be configured for V/f mode (see p1300) first. Run the drive and compare

r0061 with r0021 that should agree in:

sign

magnitude (with a deviation of only a few percent)

Only if both criteria are fulfilled, change p1300 and select VC (p1300 = 21/23).

¾Encoder loss detection must be disabled (p0492 = 0) if torque is limited externally., e.g.:

closed-loop winder control

traversing / moving to a fixed endstop

when using a mechanical brake

Control mode

0

21 Vector control with sensor

 

 

 

Filter time for act. speed

4 ms

Sets time constant of PT1 filter to smooth actual speed of speed controller.

 

Decreasing the value leads to a higher dynamic of the speed regulation. Instability is seen if the value is to low. p1442 = 2 can be set for most applications.

Gain speed controller

 

 

 

 

 

 

3.0

Enters gain of speed controller.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Integral time speed controller

 

 

 

 

 

 

 

 

 

400 ms

Enters integral time of speed controller.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

p1488

p1489

 

 

r1490

150 ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Droop

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

0

p1492

r1170r1084

Freq. setpoint

r0063

p1496 p0341 p0342

r1518

Precontrol

p1460

p1462

 

r1438

Kp

Tn

*)

 

 

 

 

 

 

 

p1442

 

r0064

 

 

 

 

 

Torque

 

setpoint

r1508

r0079

Act. frequency from encoder

*) only active, if pre-control is enabled (p1496 > 0)

MICROMASTER 440

53

Operating Instructions (Compact)

Page 53
Image 53
Siemens 440 operating instructions 17.2, Vector control with encoder VC, Filter time for act. speed, Gain speed controller