Sequence instruction for S7 and positioning

WilsonNC

Member
Join Date
Dec 2010
Location
Murphy
Posts
24
Is there a sequencer instruction for S7, or does anyone have a function for one. I want to index a pointer into a DB of 20 DINT's. The outputed value will then be added and subtracted with another "window" value. The new value will be compared to the DINT value coming from a POS338 module. Sort of a crude position method, but it works fine with AB logic.

Does anyone have any ideas on the easiest way to accomplish this?
 
Example function to return the indexed value from an array of DINTs shown in the attached project.
 

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