Defining Additional Requirements For The Application - Siemens SINAMICS G120C Operating Instructions Manual

Commissioning
5.2 Preparing for commissioning
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 ramp-up and ramp-down times are also 10 seconds, referred to 1500 rpm.
Figure 5-2
Operating the motor with the factory settings
In simple applications, you can attempt to operate the drive with a power rating < 18.5 kW
without having commissioned it. Check that the control quality of the drive is good enough for
the requirements of the application without commissioning.
We recommend configuring the drive with the precise motor data.
5.2.3

Defining additional requirements for the application

What speed limits should be set (minimum and maximum speed)?
● Minimum speed - factory setting 0 [rpm]
The minimum speed is the lowest speed of the motor independent of the speed setpoint.
A minimum speed is, for example, useful for fans or pumps.
● Maximum speed - factory setting 1500 [rpm]
The inverter limits the motor speed to this value.
What motor ramp-up time and ramp-down time are needed for the application?
The ramp-up and ramp-down time define the maximum motor acceleration when the speed
setpoint changes. The ramp-up and ramp-down time is the time between motor standstill and
the maximum speed, or between the maximum speed and motor standstill.
● Ramp-up time - factory setting 10 s
● Ramp-down time - factory setting 10 s
92
Jogging the motor with the factory settings
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
SINAMICS G120C converter