Siemens SIMATIC S7-300 Manual page 194

Description of Functions
With reference It is necessary to connect the reference point switch (RPS) to a digital input
point switch (RPS)
and parameterize it in MD34.
Triggering of move-
synchronization (R)
9-18
Type of reference-
ment, Direction for
point approach
1st situation
zero pulse to right
of RPS
2nd situation
zero pulse to left of
RPS
3rd situation
R+ ("edge-con-
RPS centered
trolled") or Start
(no zero pulse nec-
essary)
4th situation
RPS edge
(no zero pulse nec-
essary)
1st situation
see above
2nd situation
see above
3rd situation
R– ("edge-con-
RPS centered
trolled") or Start
(no zero pulse nec-
essary)
4th situation
RPS edge
(no zero pulse nec-
essary)
Sequence of motions
(reference point offset = 0)
V – referencing velocity
A
V – reducing velocity
R
V V
A R
–
RPS
zero pulse
V
A
V
R
–
RPS
V
A
V
R
–
RPS
V
A
V
R
–
RPS
equals R+ 2nd situation mir-
rored
equals R+ 1st situation mir-
rored
equals R+ 3rd situation mir-
rored
equals R+ 4th situation mir-
rored
FM 354 Servo Drive Positioning Module
+
Ref. pt.
+
+
+