6
6.1
Operating mode, speed/torque setpoint (P0700 = 1)
6-348
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
The following limits all effect the torque setpoint at the speed controller
output. The ”lowest” (minimum) is used if different limits are available.
Torque limiting
The value specifies the maximum permissible torque, whereby dif-
ferent limits can be parameterized for motoring and generating oper-
ation.
Power limiting
The value specifies the maximum permissible power, whereby dif-
ferent limits can be parameterized for motoring and generating oper-
ation.
Stall limiting (only for ARM and PE spindle)
The stall limiting is internally calculated in the drive from the motor
data. The internally calculated limit can be changed using the torque
reduction factor.
!
Warning
If the stall limit has been set too high, this can cause the motor to
”stall”.
As the current limiting additionally limits the maximum torque which the
motor can provide, if the torque limit is increased, more torque will only
be available if a higher current can also flow. It may be necessary to
also adapt the current limit.
P1230
P1235
When regenerating,
additional limiting using
P1237
Constant
torque
range
Constant power range
Torque limiting
Power
limiting
Stall limitation
P1145
Speed n
act
Resulting torque
limit value
X1/n
2
X1/n
Rated speed n
rated
n
Stall
P1148
n
Stall
This is internally calculated
and is displayed via P1148
(speed at the stall power).
Fig. 6-7
Limiting the torque setpoint
Limiting the torque
setpoint
6 Description of the Functions
01.99
