Siemens SIRIUS 3RW40, Manual

Page: 105 / 212

Commissioning
12.5 Setting the soft stop function
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
105
12.5 Setting the soft stop function
In "soft stop" mode, the natural stop process of the load is decelerated. The function is used
when the load must be prevented from stopping abruptly. This is typically the case in
applications with a low mass inertia or a high counter-torque.
12.5.1 Setting the ramp-down time
t potentiometer
You can set a ramp-down time with the t potentiometer. This determines how long power
should still be supplied to the motor after the ON command is removed. The torque generated
in the motor is reduced by means of a voltage ramp function within this ramp-down time and
the application stops smoothly.
If the potentiometer is set to 0, there is no voltage ramp during stopping (stop without load).
12.6 Setting the motor protection function
The motor overload protection function is implemented on the basis of the winding
temperature. This indicates whether the motor is overloaded or functioning in the normal
operating range.
The winding temperature can either be calculated with the help of the integrated, electronic
motor overload function or measured with a connected motor thermistor.
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