MC_TouchProbe

Function block		MC_TouchProbe
Records an axis' position at a trigger event.
VAR_IN_OUT
B	AxisIn	AXIS_REF	Reference to an axis.
E	TriggerInput	MC_TRIGGER_REF	Reference to the trigger signal source. Trigger input may be specified by the AXIS_REF.
VAR_INPUT
B	Execute	BOOL	Starts touch probe recording at rising edge.
E	WindowOnly	BOOL	If set, only the value in the window will be used to trigger events. The window is the range between FirstPosition and LastPosition.
E	FirstPosition	LREAL	Start position from where (positive direction) trigger events are accepted (in user units). Value included in window. Currently, FirstPosition must be less than LastPosition.
E	LastPosition	LREAL	Stop position of the window (in user units). Value included in window.
VAR_OUTPUT
B	Done	BOOL	Trigger event recorded.
E	Busy	BOOL	The function block is not finished and new output values are to be expected.
E	CommandAborted	BOOL	The command is aborted by another command.
B	Error	BOOL	Signals that an error has occurred within the function block.
E	ErrorID	MC_Error	Error identification.
Intended for single shot operation. That is, the first event after the rising edge when Execute is valid. Possible following events are ignored. One function instance should represent exactly one probing command. In case of multiple instances on the same probe and axis, the elements of the MC_TRIGGER_REF structure should be extended with TouchProbeID, the identification of a unique probing command, which can be linked to MC_AbortTrigger. After MC_TouchProbe is done, you need to wait one cycle for the touch probe to take effect. For further details about how MC_TouchProbe works, see Touch probe in Concepts.

 

		MC_TouchProbe
AXIS_REF		AxisIn		Axis		AXIS_REF
MC_TRIGGER_REF		TriggerInput		TriggerInput		MC_TRIGGER_REF
BOOL		Execute		Done		BOOL
BOOL		WindowOnly		Busy		BOOL
LREAL		FirstPosition		CommandAborted		BOOL
LREAL		LastPosition		Error		BOOL
				ErrorID		MC_Error
				RecordedPosition		LREAL

 

Timing example of MC_TouchProbe

 

Examples of windows, where trigger events are accepted (for modulo axes)