Siemens 440 - Manual (Page 172)

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
172 6SE6400-5BB00-0BP0
3.29.2.3 Speed 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 [%].
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.
Torque
setpoint
–
Freq. setpoint
PI
Speed
controller
r1538
r1539
r1538
r1539
r1538
r1539
P1496
P0341 P0342
P1492 P1489 P1488
Droop
r1490
150 ms
r1518
–
Act. frequency
=0
>0
r0063
r1170
r0079 r1508
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
CStat: CUT Datatype: Float Unit: % Def: 100.0
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)
Level
3
Level
3