Application examples
Setpoint summation
13−14
l
EDB82MV752 EN 5.2
13.5 Setpoint summation (base and additional load operation)
Conveyors, pumps etc. are often operated at a basic speed which can be increased, if required.
The speed is set by selecting a main and additional setpoint at the controller. The setpoints can have
different sources (e.g. PLC and setpoint potentiometer). The controller adds both analog setpoints
and increases the motor speed accordingly.
For smooth acceleration, acceleration and deceleration ramps of both setpoints can be adjusted
variably. Moreover, the main setpoint ramps can have an S−shape.
Application−specific configuration
Basic settings. ( 6−2)
Setpoint summation configuration: assign the setpoints to be added to C0412/1 and
C0412/3.
( 7−57)
If required, set S−shape main setpoint ramps under C0182. ( 7−24)
Tip!
Possible ways to select a setpoint: ( 7−32 ff)
The additional setpoint can be displayed under C0049 (alternatively: selection when
C0412/3 = 0).
With controllers with standard I/O, the mains setpoint must be selected via PC, keypad, fixed
frequency (JOG) or via the "motor potentiometer" function, since only one analog input is
available.
If you use an application I/O, the additional setpoint can be switched on and off during
operation (C0410/31
0)
Main
setpoint
Additional
setpoint
Motor
Speed
K35.82M001
S ramps
Fig. 13−6 Principle of setpoint summation
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