Danfoss MCO 305 Design Manual

Also see for MCO 305: Operating instructions Operating instructions Design guide

MCO 305 Design Guide__ Functions and Examples __18 MG.33.L5.02 – VLT® is a registered Danfoss trademarkRelative PositioningRelative positioning is always relating to the actual position, it is therefore possible to execute a positioningprocedure without defining the absolute zero point.If the starting position is 100.000, with a relative positioning to 150.000 the target position is 250.000(100.000 + 150.000), the moving distance is thus 150.000.Touch Probe PositioningWith touch probe positioning, the positioning is related to the actual position when the touch probe input isactivated, that means the target position is the position of the touch probe + the positioning distance. Touchprobe positioning is thus relative positioning relating to a touch probe instead of the actual starting position.The touch probe is a sensing device; it can be a mechanical switch, a proximity sensor, an optical sensor orthe like. Once the touch probe is activated, for example by a box moved on a conveyor belt, the referencefor the positioning is set.With touch probe positioning to position 50.000 the drive is running until the touch probe is activated forexample at position 200.000 and it continues to a target position of 250.000 (200.000 + 50.000). Touchprobe positioning is also called “marker related positioning”.