32 • 750-636 [DC Drive Controller]Function DescriptionWAGO-I/O-SYSTEM 750I/O-Modules2.1.1.9.8.5 Positioning with positively initialized overtravelExample 10:ADBDIPHP = SP AP = SP + PDPU = BDPD = BDRT = 0OZ = 0OT = +VOT+-Fig. 2.1.1-16: Example 10 g063619xThe positively initialized overtravel forces the setpoint position to beapproached from above. In example 10, the actual position is further abovethe setpoint position than the absolute value of the overtravel. Thus thesetpoint position can be reached within the first moving cycle.Example 11:PU = BDPD = BDRT = 1OZ = 0OT = +VPUIPIPSP2 x PD > Abs(OT)HP = SPAP = HP - PUADADPUPDHPOTAP = SP + PD++--Fig. 2.1.1-17: Example 11 g063620xIn example 11, the actual position is below the setpoint position. The driveshould now overtravel the setpoint position by the amount of the absoluteovertravel value. It is detected, however, that the absolute overtravel value isnot at least twice as large as the current prestop value for the Down direction.In order to compensate for this, the setpoint position is overtravelled by agreater distance than the given overtravel so that the first setpoint positionapproach of the moving cycle can be successful.
