V/F Control Or Speed Control - Siemens Sinamics G110M Operating Instructions Manual

Figure 5-3
The ramp-up and ramp-down times define the maximum motor acceleration when the speed
setpoint changes. The ramp-up and ramp-down time is derived from the time between motor
standstill and the maximum speed, or between the maximum speed and motor standstill.
Switching the motor on and off in the jog mode
In the case of inverters with a PROFIBUS or PROFINET interface, operation can be
switched via digital input DI 3. The motor is either switched on and off via PROFIBUS – or
operated in jog mode via its digital inputs.
When a control command is received at the respective digital input, the motor rotates at
±150 rpm. The same ramp-up and ramp-down times as described above apply.
Figure 5-4
5.3.3

V/f control or speed control

For induction motors, there are two different open-loop control or closed-loop control
techniques:
● V/f control (calculation of the motor voltage using a characteristic curve)
● Closed-loop speed control (also: field-oriented control or vector control)
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 09/2017, FW V4.7.9, A5E31298649B AH
Switching on and switching off the motor and reversing in the factory setting
Jogging the motor with the factory settings
Commissioning
5.3 Prepare commissioning
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