It is an Example for STEP Motor. PLS_Val_Out outputs Pulse(4000 ticks)  (VAL: 500)  to Position. STEP_POS_ACC StepMotor will be in position which is from  PLS_Val_Out. 

"Reset" --> Reset Position.

STEP Motor Operation Output --> AP AN BP BN 

If It reaches position,the  Ready output to DO_P4 ON. 

STEP_POS_ACC is Lib concept object which has acceleration & position calculation. 

This Lib object including integrated relation in this example. 

(c) ePenguin (epoffice.blogsite.org) ,  demo only.