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Description of Functions
Frequency
(pulse/direction interface)
Setpoint Output
Target speed
+
From
–
servo position
control
MD19
Fig. 9-14 Overview of Frequency Setpoint Output
The step drive is actuated via the digital interfaces "Pulse" and "Direction".
The pulse frequency determines the motor speed. The pulse length is auto-
matically set by the FM 453 to a symmetrical 1:1 sampling ratio with re-
spect to the currently output frequency.
The direction information of the internal velocity setpoint value is converted
into the "direction" signal for the step drive.
Direction alignment
MD19 allows you to align the direction by defining an assignment between
the signal level of the "Direction" signal and the axis movement. Under de-
fault conditions, the following assignment applies:
"Direction" = 0
"Direction" = 1
19.1
9-86
Velocity/frequency
assignment
MD23
MD11
MD12
MD52
Setpoint in
Control mode
Positive direction
Negative direction
MD
Designation
Direction adjustment
Frequency
ramp
MD45
MD54, MD55
MD56
MD57,MD58
MD59, MD60
MD61
(or)
Value/Meaning
1 = Invert direction of drive rotation
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Direction
DFC value
To drive
actuation
Unit
–
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