Watson-Marlow MM440 - Manual (Page 253)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0 253
3.23.2.4 Closed-loop torque control
Parameter range: P1300, P1500 – P1511
P1400 – P1780
Warnings -
Faults -
Function chart number:
FP7200, FP7210, FP7700, FP7710
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.
–
Torque
setpoint
Droop
Act. frequency
–
r1538 r1538
r1539 r1539
0
CI: Torque setp.
(0:0)
P1503.C
(0:0)
BI:-> torque ctrl.
P1501.C
CI: Add. trq. setp
(0:0)
P1511.C
Pre-
control
Freq. setpoint
PI
Speed
controller
SLVC:
VC: P1452
P1442 P1470
P1460 P1472
P1462
T
i
K
p T n
T i K p
T
n
*)
*) only active if pre-control is activated
(P1496 > 0)
Fig. 3-108 Closed-loop speed/torque control