Closed-Loop Torque Control - Siemens MICROMASTER 440 Operating Instructions Manual

Issue 10/06
3.23.2.4

Closed-loop torque control

Parameter range:
Warnings
Faults
Function chart number:
For sensorless closed-loop speed control SLVC (P1300 = 20) or for closed-loop
speed control with sensor VC (P1300 = 21), it is possible to changeover to closed-
loop torque control (slave drive) using BICO parameter P1501. It is not possible to
changeover between closed-loop speed and torque control if the closed-loop
torque control is directly selected using P1300 = 22 or 23. The torque setpoint and
supplementary torque setpoint can be selected using parameter P1500 and also
using BICO parameter P1503 (CI: Torque setpoint) or P1511 (CI: Supplementary
torque setpoint). The supplementary torque acts both for the closed-loop torque
control as well as for the closed-loop speed control (refer to Fig. 3-108). As a result
of this feature, a pre-control torque for the speed control can be implemented using
the supplementary torque setpoint.
NOTE
For safety reasons, it is presently not possible to assign fixed torque setpoints.
Freq. setpoint
Act. frequency
CI: Torque setp.
P1503.C
BI:-> torque ctrl.
P1501.C
(0:0)
CI: Add. trq. setp
P1511.C
*) only active if pre-control is activated
(P1496 > 0)
Fig. 3-108
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
P1300, P1500 – P1511
P1400 – P1780
-
-
FP7200, FP7210, FP7700, FP7710
Pre-
control
–
*)
–
T
i
(0:0)
(0:0)
Closed-loop speed/torque control
Droop
0
K
T
p
n
PI
r1538
Speed
controller
r1539
T
SLVC: P1452
VC: P1442
3 Functions
r1538
Torque
setpoint
r1539
T
K
n
i p
P1470 P1472
P1460 P1462
253