Festo SFC-DC series, Manual

Page: 28 / 202

1. System summary
1−10
Festo P.BE−SFC−DC−IO−EN en 0801a
1.1.2 Method of operation
In the positioning mode, a certain position is specified to
which the motor is to move. The current position is obtained
from the information from the internal increment sensor
(magnetic encoder). The position results from the gear reduc
tion and the spindle pitch.
The deviation of the position is processed in the position
controller and passed on to the speed regulator.
1
Controller SFC−DC
2
Controller
3
Nominal value
generator
4
Position controller
5
Speed regulator
6
Current regulator
7
End stage
8
Signal convertor
M
P PI
3
8
4
5 6 7
1
2
P
Fig.1/5: Simplified technical representation of the cascade regulator function
The controller takes over the following tasks:
sequence control via digital inputs and outputs
(typeSFC−DC−...−IO)
specification of the nominal positions by positioning
control
control of the following variables: Position, speed,
acceleration, current (power).