Siemens SIMATIC FM 453, Manual

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9-18
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
It is necessary to connect the reference point switch (RPS) to a digital input
and parameterize it in MD34.
Triggering of Move-
ment, Direction for
Synchronization (R)
Type of Reference-
Point Approach
Sequence of Motions
(Reference Point Offset = 0)
V
A
– referencing velocity
V
R
– reducing velocity
1st situation
zero reference
mark to right of
RPS
RPS
V
A
V
R
– +
Ref. pt.
2nd situation
zero reference mark
to left of RPS
Zero ref-
erence
mark:
V
A V
R
– +
RPS
R+ (“edge-con-
trolled”) or Start
3rd situation
RPS centered
(no zero pulse nec-
essary)
RPS
V
A
V
R
– +
4th situation
RPS edge
(no zero pulse nec-
essary)
RPS
V
A
V
R
– +
1st situation
zero reference mark
to right of RPS
equals R+ 2nd situation
mirrored
R– (“edge-con-
trolled”) or Start
2nd situation
zero reference mark
to left of RPS
equals R+ 1st situation
mirrored
trolled”) or Start
3rd situation
RPS centered (no
zero pulse
necessary)
equals R+ 3rd situation
mirrored
4th situation
RPS edge (no zero
pulse necessary)
equals R+ 4th situation
mirrored
With Reference
Point Switch (RPS)
Description of Functions