Parameter Description

Issue 01/06

3.29.2.3Speed controller pre-control

P1496[3]

Scaling accel. precontrol

 

Min:

0.0

 

CStat:

CUT

Datatype: Float

Unit: %

Def:

0.0

 

P-Group:

CONTROL

Active: Immediately

QuickComm.: No

Max:

400.0

Enters scaling of acceleration in [%].

Level

3

The response of setpoint changes for the speed control loop can be improved using the precontrol function (P1496). Precontrol is derived from the differential frequency setpoint multiplied by the mass inertia P0341; P0342 is then supplied as a torque setpoint to the current controller. If the filter (VC: P1442, SLVC: P1452) is applied in the correct manner, the derived speed controller is only required to control a small deviation in the value of the corrected variable. Setpoint changes are then passed by the speed controller and are quickly executed.

r1490

P1492 P1489 P1488

150 ms

P0341 P0342

Droop

r1518

r1538

r1170

Freq. setpoint

r0063

Act. frequency

P1496

=0

 

PI

r1538

r1538

 

 

 

 

Speed

 

 

 

 

r1539

 

 

 

>0

controller

 

Torque

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

r1539

r1539

setpoint

 

 

 

 

r1508

 

r0079

Index:

 

 

P1496[0]

: 1st. Drive data set (DDS)

 

 

 

 

 

 

P1496[1]

: 2nd. Drive data set (DDS)

 

 

 

 

 

 

P1496[2]

: 3rd. Drive data set (DDS)

 

 

 

 

 

Note:

P1496 = 0:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Precontrol disabled

 

 

 

 

 

 

 

P1496 > 0:

 

 

 

 

 

 

 

Precontrol enabled

 

 

 

 

 

 

 

P1496 = 100:

 

 

 

 

 

 

 

Standard setting for precontrol

 

 

 

 

 

P1499[3]

Scaling accel. torque control

 

Min:

0.0

Level

 

 

CStat:

CUT

Datatype: Float

Unit: %

Def:

100.0

3

 

 

 

 

 

P-Group:

CONTROL

Active: Immediately

QuickComm.: No

Max:

400.0

 

Enters scaling of acceleration in [%] for sensorless torque control (SLVC) at low frequencies.

Index:

P1499[0] : 1st. Drive data set (DDS)

P1499[1] : 2nd. Drive data set (DDS)

P1499[2] : 3rd. Drive data set (DDS)

172

MICROMASTER 440 Parameter List

6SE6400-5BB00-0BP0

Page 172
Image 172
Siemens 440 manual P14963 Scaling accel. precontrol, P14993 Scaling accel. torque control, 172