Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Drive converter cabinet units
290
Operating Instructions, 07/07, A5E00288214A
7.4.5
Torque limiting
Description
0OLPLWV
,OLPLWV
3OLPLWV
0D[
0LQ
p 1520
p 1521
r 1526
r 1527
p 0640
p 1530
p 1531
r 1538
r 1539
r 1407 . 9
r 1407 . 8
Figure 7-17 Torque limiting
The value specifies the maximum permissible torque whereby different limits can be
parameterized for motor and regenerative mode.
•
p0640
Current limit
•
p1520
Torque limit, upper/motoring
•
p1521
Torque limit, lower/regenerative
•
p1522
Torque limit upper/motoring
•
p1523
Torque limit, lower/regenerative
•
p1524
Torque limit, upper/motoring, scaling
•
p1525
Torque limit, lower/regenerating scaling
•
p1530
Power limit, motoring
•
p1531
Power limit, regenerating
The currently active torque limit values are displayed in the following parameters:
•
r0067
Maximum drive output current
•
r1526
Torque limit, upper/motoring without offset
•
r1527
Torque limit, lower/regenerative without offset
All of the following limits act on the torque setpoint – that is either available at the speed
controller output for closed-loop speed control or as torque input, for closed-loop torque
control. The minimum or the maximum is used for the various limits. This minimum or
maximum is cyclically calculated and is displayed in r1538 or r1539.
•
r1538
Upper effective torque limit
•
r1539
Lower effective torque limit
These cyclical values therefore limit the torque setpoint at the speed controller output/torque
input or indicate the instantaneous max. possible torque. If the torque setpoint is limited, then
this is displayed using parameter p1407.
•
r1407.8
Upper torque limit active
•
r1407.9
Lower torque limit active
