2 vector control with encoder (vc) – Siemens MICROMASTER 440 User Manual

Page 53

Issue 10/06

6 Commissioning

MICROMASTER 440
Operating Instructions (Compact)

6.4.17.2

Vector control with encoder (VC)

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

When 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).

Encoder 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
21 Vector control with sensor

Filter time for act. speed

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

Enters gain of speed controller.

Integral time speed controller

Enters integral time of speed controller.

Precontrol

Freq. setpoint

r1438

r1084

–

p1460 p1462

r0064

Torque

setpoint

p1496 p0341 p0342

p1442

Act. frequency
from encoder

r0063

r1170

–

p1492

p1489

p1488

Droop

r1490

150 ms

r1518

r0079

r1508

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

P1300=21

4 ms

3.0

P1442 = ...

P1460 = ...

P1462 = ...

400 ms