Setpoint Sources - Siemens SINAMICS G120 Operating Instructions Manual

Functions

9.4 Setpoint sources

9.4 Setpoint sources
The inverter receives its main setpoint from the setpoint source. The main setpoint generally
specifies the motor speed.
Figure 9-11
You have the following options when selecting the source of the main setpoint:
● Inverter analog input.
● Inverter fieldbus interface.
● Motorized potentiometer simulated in the inverter.
● Fixed setpoints saved in the inverter.
You have the same selection options when selecting the source of the supplementary
setpoint.
Under the following conditions, the inverter switches from the main setpoint to other
setpoints:
● When the technology controller is active, it's output specifies the motor speed.
● When jogging is active.
● When controlling from an operator panel or the STARTER PC tool.
In the basic commissioning, you have already selected a setpoint source. Refer also to
Section: Selecting the interface assignments (Page 44).
However, you can change this setting. The setpoint sources will be described in more detail
on the following pages.
174
Setpoint sources for the inverter
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB