Siemens 440 17.2, Vector control with encoder VC, Filter time for act. speed

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)