Siemens SINAMICS G120D - Page 132

Advanced commissioning
7.3 Setpoints
Converter with control units CU250D-2
132 Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
Example: Select two fixed setpoints directly
The motor should operate at different speeds as follows:
● The signal on digital input 0 switches the motor on and accelerates it to 300 rpm.
● The signal at digital input 1 accelerates the motor to 2000 rpm.
● The signals at the two digital inputs accelerate the motor to 2300 rpm.
Table 7- 7 Settings for the example
Parameter
Description
p1001 = 300.000
Fixed speed setpoint 1 [rpm]
p1002 = 2000.000
Fixed speed setpoint 2
[rpm]
p0840 = 722.0
ON/OFF1: Switch on motor with digital input 0
p1070 = 1024
Main setpoint:
Interconnect the main setpoint with the fixed speed set-
point.
p1020 = 722.0
Speed fixed setpoint selection Bit 0:
Interconnect fixed setpoint 1 with
digital input 0 (DI 0).
p1021 = 722.1
Fixed speed setpoint selection bit 1:
Interconnects fixed setpoint 2 with
digital input 1 (DI 1).
p1016 = 1
Fixed speed setpoint mode: Select direct selection of the fixed setpoints.
Table 7- 8 Resulting fixed setpoints for the example above
Fixed setpoint selected by
Resulting setpoint
DI 0 = 0
Motor stops
DI 0 = 1 and DI 1 = 0
300 rpm
DI 0 = 1 and DI 1 = 1
2300 rpm