Siemens SIRIUS M200D Manual page 34

Functions
3.5 Motor control
Start time
During the parameterized starting time, the motor terminal voltage is increased linearly from
the starting voltage to the full line voltage. A setting of 0s means that the motor is switched
on with a voltage ramp of 100 milliseconds to reduce the peak inrush current.
Run-down time
During the parameterized run-down time, the motor terminal voltage is reduced linearly from
the line voltage to the stopping voltage. A setting of 0s means that the motor is switched off
directly, without a voltage ramp.
Startup mode
There are four methods of starting the motor:
● Direct: The motor is switched on directly without a voltage ramp or current limitation.
● Voltage ramp: The motor is started up on a linear, positive voltage ramp.
● Current limiting: The inrush current of the motor is limited to a specified value.
● Voltage ramp + current limiting: If the motor current exceeds the specified value at
startup, the voltage ramp is aborted and the current is limited.
Note
In the case of "direct" startup mode, you must note the following derating:
• Reduction of the rated operating current from 12 A to 9 A
• Only CLASS 5 or CLASS 10 possible.
Run-down type
There are two methods of running down or stopping the motor:
● Run-down without load: The motor is switched off immediately.
● Voltage ramp: The motor is powered down on a linear, negative voltage ramp.
Starting voltage
The starting voltage is the initial value of the voltage ramp for soft starting. The voltage ramp
is started with the appropriate starting voltage and increased linearly to the line voltage.
34
M200D AS-Interface Standard
Manual, 08/2014, A5E02548958A/RS-AA/004