Siemens SIMATIC FM 351 - Page 115

Modes and Jobs
9-29
FM 351 Positioning Module
C79000-G7076-C351-02
Example
Based on a positioning operation with a loop traverse minus to a maximum
destination, we can illustrate the location of the fictitious target.
Switchover diff. minus Switch-off diff. plus
1
2
3
½ target range
1
2
Target
-v
creep
3
Change
of
direction
v
rapid
V
creep
Software limit switch
end
Fictitious target
Figure 9-10 Loop Traverse Minus to a Maximum Target