FB_AxisPlsPosModulo

Description

This function block can be used for any position of a modulo axis in both directions. The Boolean output oPLS is set to TRUE if the position has crossed the start position and is set to FALSE if the position has crossed the end position. The function block is executed cyclically. The function block has the possibility to compensate a delay time of the connected device, e .g. glue nozzles. It is also possible to define a hysteresis for switching on and off of the PLS.

Arguments

Input

ibExecute	Description	Enable PLS
	Data type	BOOL
iPosition	Description	Any position of a modulo axis
	Data type	LREAL
iModuloPosition	Description	Modulo position of axis
	Data type	LREAL
iStartPos	Description	Start position of PLS
	Data type	LREAL
iEndPos	Description	End position of PLS
	Data type	LREAL
iDelayTime	Description	Delay time for compensation
	Data type	TIME
iHysteresis	Description	Hysteresis
	Data type	LREAL
ibForce	Description	Force PLS
	Data type	BOOL

Output

oPLS	Description	Position limit switch
	Data type	BOOL

Example

Timing

Hysteresis

ST

//PLSOutput is True when position input is between 180 and 270 with a T#2ms delay
//Can also force the output to be true with ForceOuput variable
//Hysteresis is on for 3 user units in case direction changes around start point

Inst_FB_AxisPlsPosModulo( EnablePLS, ActualPosition, ModuloPosition, 180, 270, T#2ms, 3, ForcePLS );

PLSOutput := Inst_FB_AxisPlsPosModulo.oPLS;

Function Block Diagram

FFLD

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