Siemens SINAMICS G120D - Page 125

Setting functions
8.3 Setpoints
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
125
Parameter for setting the fixed setpoints
Parameter
Description
p1001
Fixed speed setpoint 1 (factory setting: 0 rpm)
p1002
Fixed speed setpoint 2 (factory setting: 0 rpm)
...
...
p1015
Fixed speed setpoint 15 (factory setting: 0 rpm)
p1016
Fixed speed setpoint mode (factory setting: 1)
1:
Direct
2:
Binary
p1020
Fixed speed setpoint selection bit 0 (factory setting: 0)
p1021
Fixed speed setpoint selection bit 1 (factory setting: 0)
p1022
Fixed speed setpoint selection bit 2 (factory setting: 0)
p1023
Fixed speed setpoint selection bit 3 (factory setting: 0)
r1024
Fixed speed setpoint effective
r1025.0
Fixed speed setpoint status
1 signal
Fixed speed setpoint is selected
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 8- 6 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 setpoint.
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 8- 7 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