Setpoint summation (basic and additional load operation)
15
Application examples
15.8
L
15.8-1
EDS82EV903-1.0-11/2002
15.8 Setpoint summation (basic and additional load operation)
Conveyors, pumps, etc. are often operated at a speed which is increased if
necessary.
The speed is set by selection of a main and additional setpoint. The setpoints can
have different sources (e.g. PLC or 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. The main setpoint ramps can have a S-shape.
l Basic settings.
l Setpoint summation configuration: Assign the setpoints to be added to
C0412/1 and C0412/3.
(¶ 10.12-1)
l
If necessary, adjust the main setpoint ramps under C0182. (¶ 10.7-1)
)
))
) Note!
l Possible ways to select a setpoint: (¶ 10.8-1 ff)
l The additional setpoint can be displayed under C0049
(alternatively: C0412/3 = 0).
l With controllers with standard I/O, the main setpoint must be
selected via PC, keypad, JOG frequency or the function ”Motor
potentiometer” because there is only one analog input
available.
l If you use an application I/O, the additional setpoint can be
switched on and off during operation ( (C0410/31 ≠ 0)
0
1
2
34
K35.82M001
Fig. 15.8-1 Principle of setpoint summation
0
Main setpoint
1
Additional setpoint
2
S-ramps
3
motor
4
speed
Application-specific
configuration
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