MCA_CamStructureSelect (FB)

FUNCTION_BLOCK MCA_CamStructureSelect

This function block selects the CAM tables by setting the connections to the relevant tables

• A virtual axis can be used as master axis.

• CamExtended is an ABB specific data type.

• MCA_CamStructureSelect makes data available. It prepares the provided data to be used by MC_CamIn or MCA_CamInDirect

Example on adding a CAM table

camtable1 : AC500_MotionControl.CamExtended := (CamTabledata := ADR(Cam), CamPoints:= 4, Tappetdata:= ADR(Cam_T), TappetPoints:= 5, MasterEnd:= 360.0, MasterStart:= 0.0, CamName:= ‘Camtable1’); where Cam:ARRAY[0..2]OF MC_PProfile :=

[

(Master_position:= 0, interpolation_point:= 0, Velocity_ratio:= 1, Acceleration_ratio:= 1 ), (Master_position:= 10, interpolation_point:= 10, Velocity_ratio:= 1, Acceleration_ratio:= 1 ), (Master_position:= 20, interpolation_point:= 15, Velocity_ratio:= 1, Acceleration_ratio:= 1 ),

];

Cam_T : Array[0..x] OF MCA_CamTappet.

Note

User can utilize CAM editor (Cam table ABB ) in Automation builder to generate Cam table automatically. For more details refer to Automation builder help.

InOut:

Scope	Name	Type	Initial	Comment
Input	Execute	BOOL		Starts the function block at rising edge
	ContinuousUpdate	BOOL		if this input is set to TRUE, before rising edge on Execute input, then any change to cam points will be taken on fly. This on fly Cam Points update can be disabled antime by setting this input to FALSE
	MasterAbsolute	BOOL		CamTable holds absolute positions for master. TRUE = Absolute, FALSE = Relative coordinates
	SlaveAbsolute	BOOL		CamTable holds absolute positions for slave. TRUE = Absolute, FALSE = Relative coordinates
	iType	MC_ABB_iTypes_Enum		Type of interpolation. Possible values are: MCA_SPLINE_COMPLETE MCA_SPLINE_NATURAL MCA_POLY5 MCA_POLY3 MCA_LINEAR
	Cam	CamExtended		Reference to CAM description, points to an array of CamExtended. User can use the Cam Editor (Cam table ABB ) to generate the Cam points
	Periodic	BOOL	TRUE	Cam table will run continuoulsy and start automatically again, if “EndOfProfile” is reached
	Reverse	BOOL		Cam should be run in the reverse direction, master axis will move from larger to smaller positions when the cam table is entered
	OffsetMode	MCA_OffsetMode		Offset Mode for Slave axis, based on Mode Selection, CamTable Execution is different
Output	Done	BOOL		Shows the status of the function block. Done = TRUE if the execution is finished
	Busy	BOOL		The function block with Busy = TRUE has control on the axis
	Error	BOOL		Signals that error has occurred within function block
	ErrorID	ERROR_ID		Error identification. For error details refer to Enumeration ERROR_ID
	CamTableID	MC_Cam_Id		Refers to prepared data, to be used for MC_CamIn or MCA_CamInDirect
Inout	Master	Axis_Ref		Reference to master axis
	Slave	Axis_Ref		Reference to slave axis