Siemens SINAMICS G120 Operating Instructions Manual page 181

Direct selection of fixed setpoints
Figure 9-16
Additional information about direct selection can be found in function diagram 3011 in the
List Manual.
Example: Direct selection of two fixed speed setpoints
The motor is to operate at two different speeds as follows:
● The motor is switched on with digital input 0 and then accelerates to 300 rpm.
● When digital input 1 is selected, the motor accelerates up to a speed of 2000 rpm.
● The motor reverses when selecting digital input 3.
Table 9- 19
Parameter
p1001 = 300.000
p1002 = 2000.000
p0840 = 722.0
p1070 = 1024
p1020 = 722.0
p1021 = 722.1
p1016 = 1
Table 9- 20
Fixed setpoint selected by
DI 0 = LOW
DI 0 = HIGH and DI 1 = LOW
DI 0 = HIGH and DI 1 = HIGH
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Simplified function diagram for directly selecting fixed setpoints
Settings for the example
Description
Fixed speed setpoint 1 in [rpm]
Fixed speed setpoint 2 in [rpm]
ON/OFF1: Switch on motor with digital input 0
Main setpoint: Interconnect the main setpoint with the speed setpoint
Fixed speed setpoint selection bit 0: Interconnect fixed setpoint 1 with digital
input 0 (DI 0).
Fixed speed setpoint selection bit 1: Interconnect fixed setpoint 2 DI 2.
Fixed speed setpoint mode: Direct selection of the fixed setpoints
Resulting fixed setpoints for the example above
Resulting setpoint
Motor stops
300 rpm
2300 rpm
Functions
9.4 Setpoint sources
179