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Functions
7.4 Setpoint sources
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
159
Fieldbus as command source
If you wish to control the motor via a fieldbus, you must connect the inverter to a higher-level
control. For additional information, see chapter Connection to a fieldbus (Page 103).
7.4
Setpoint sources
7.4.1
Selecting the setpoint source
The setpoint source is the interface via which the inverter receives its setpoint. The following
options are available:
● Motorized potentiometer simulated in the inverter.
● Inverter analog input.
● Fixed setpoints saved in the inverter.
● Inverter fieldbus interface.
Depending on the parameterization, the setpoint in the inverter has one of the following
meanings:
● Speed setpoint for the motor.
● Torque setpoint for the motor.
● Setpoint for a process variable.
The inverter receives a setpoint for a process variable, e.g. the level of liquid in a
container, and calculates its speed setpoint using the internal technology controller.
Changing the setpoint source
You selected the setpoint source in the basic commissioning. If you must subsequently
change the setpoint source, set the following parameters:
p1000
= 0
= 1
= 2
= 3
= 6
= 7
No main setpoint
MOP setpoint / motorized potentiometer
Analog setpoint
Factory setting for inverters without PROFIBUS interface
Fixed setpoint
Fieldbus
Factory setting for inverters with PROFIBUS interface
Analog setpoint 2