Reference Point Approach - Siemens SIMATIC FM 353 Manual

9.2.3

Reference point approach

Overview
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) specified in the
machine data.
The axis is thus synchronized (see Section 9.6.1).
The override is set at 100% for the reducing speed.
An active zero offset or Set actual value is reset.
Machine data
The following table lists the machine data that is of significance for reference-point
approach:
MD Designa-
16 Reference-
point coor-
dinate
18 Type of ref-
erence-
point ap-
proach
27 Reference-
point shift
28 Referencing
speed
29 Reducing
speed
34 Inputs
MSR stands for measurement system raster (see Section 5.3.1)
Handling by the user
S with connected reference-point switch (RPS).
S without connected reference-point switch (RPS).
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
tion
−1,000,000,000 − +1,000,000,000
0 = direction +, current-sourcing pattern zero/
zero pulse external, to right of reference point switch
1 = direction +, current-sourcing pattern zero/
zero pulse external, to left of reference point switch
2 = direction − , current-sourcing pattern zero/
zero pulse external, to right of reference point switch
3 = direction − , current-sourcing pattern zero/
zero pulse external, to left of reference point switch
4 = direction +, reference point switch center
5 = direction − , reference point switch center
8 = direction + , reference point switch edge
9 = direction − , reference point switch edge
−1,000,000,000 − +1,000,000,000
10 − v (MD23)
max
10 − x (see Machine data list, Table 5-4)
5 = reference point switch for
reference point approach
6 = reversing switch for reference point approach
Description of Functions
Value/Meaning Comments/
Unit
[MSR]
[MSR]
[MSR/min]
[MSR/min]
Assigned
depending
on input
9-19