Hello All

Im not know how write in program this issie.

Have s7-1200 fw 4.4 , use HSC1 and set of A/B .

If go to left count 0,1,2,3..... 100 

If go to right 0.-1.-2.-3.....-100 

All is ok but I need write algorithm for find maximum or minimum value. And not know how write it .... 

Its simply pendulum.

Pleas help my of this problem.