Siemens SIMATIC FM 453, Руководство пользователя

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9-17
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
9.2.3 Reference Point Approach
In Reference-point approach mode, the direction keys (R+ or R–) or Start are
used to position the axis to a point (reference-point coordinate MD16) speci-
fied in the machine data.
The axis is thus synchronized (see Section 9.6.4).
The overrideis set to 100% for the reducing speed.
An active zero offset or Set actual value is reset.
The following table lists the machine data that is of significance for refer-
ence-point approach:
MD Designation Value/Meaning Comments/
Unit
16 Reference-
point coordi-
nate –1,000,000,000 – +1,000,000,000 (MSR)
18 Type of refer-
ence-point ap-
proach
(reference-
point ap-
proach direc-
tion)
0 = dir, zero ref. mark right
1 = dir, zero ref. mark left
2 = direction –, zero ref. mark right
3 = direction –, zero ref. mark left
4 = dir, RPS center
5 = direction –, RPS center
8 = dir, RPS edge
9 = direction –, RPS edge Zero refer-
ence mark:
See zero ref-
erence mark
selection,
Figure 5-5
27 Reference-
point shift –1,000,000,000 – +1,000,000,000 (MSR)
28 Referencing
speed 10...500 000 000
see Section 5.3.1, Dependencies (MSR/min)
29 Reducing
speed 10...500 000 000
see Section 5.3.1, Dependencies (MSR/min)
34 dig. Inputs 5 = reference point switch for
reference point approach
6 = reversing switch for reference point ap-
proach
Assigned de-
pending
on input
MSR stands for measurement system raster (see Section 5.3.1)
When an absolute encoder is used, only the reference point coordinate de-
fined as a fixed point on the axis is approached in Reference-point approach
mode.
When an incremental encoder is used, the user has two options for recording
the reference point:
S
with connected reference-point switch (RPS)
S
without connected reference-point switch (RPS).
Overview
Machine Data
Handling by
the User
Description of Functions