Factory Setting Of The Inverter Control - Siemens SINAMICS G120 Operating Instructions Manual

6.1.4

Factory setting of the inverter control

Switching the motor on and off
The inverter is set in the factory so that after it has been switched on, the motor accelerates
up to its speed setpoint in 10 seconds (referred to 1500 rpm). After it has been switched off,
the motor also brakes with a ramp-down time of 10 seconds.
Figure 6-4
Switching the motor on and off in the jog mode
For inverters with PROFIBUS interface, operation can be switched over using digital input DI
3. The motor is either switched on and off via PROFIBUS – or operated in the jog mode via
its digital inputs.
For a control command at the respective digital input, the motor rotates with ±150 rpm. The
ramp-up and ramp-down times are also 10 seconds, referred to 1500 rpm.
Figure 6-5
For induction motors, there are two different open-loop control or closed-loop control
techniques:
● U/f control (calculation of the motor voltage using a characteristic curve)
● Closed-loop speed control (also: field-oriented control or vector control)
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Switching on and switching off the motor and reversing in the factory setting
Jogging the motor in the factory setting
Basic commissioning
6.1 Preparing basic commissioning
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