MC_TouchProbe (FB)¶

FUNCTION_BLOCK MC_TouchProbe

This function block is designed for recording an axis position when a trigger event is raised.

Note

The function block is intended for single shot operation, that is, only the first event following on a rising edge of Execute is One function block instance should represent exactly one probing command.

Example

Timing and TouchProbe

Example

Defining a window, where trigger events are accepted (for modulo axes).

InOut:

Scope	Name	Type	Comment
Inout	`Axis`	AXIS_REF_SM3	Reference to axis, the position of which is to be recorded at a defined event at the trigger input.
Inout	`TriggerInput`	TRIGGER_REF	Reference to trigger signal source
Input	`Execute`	`BOOL`	Rising edge: Starts the execution of the function block.
	`WindowOnly`	`BOOL`	`TRUE`: Trigger events will be accepted only within the specified window.
	`FirstPosition`	`LREAL`	Start position from whereon (in positive direction) trigger events will be accepted (in technical units [u]). Only used if `WindowOnly = TRUE`.
	`LastPosition`	`LREAL`	End position up to which trigger events will be accepted (in technical units [u]). Only used if `WindowOnly = TRUE`.
Output	`Done`	`BOOL`	`TRUE`: Trigger event has been recorded.
	`Busy`	`BOOL`	`TRUE`: Execution of function block has not been finished yet.
	`Active`	`BOOL`	Indicates that the touch probe function is active. It can take some time to activate the touch probe function. As long as `Active` is FALSE, trigger events may be ignored. The output is reset if `Done`, `Error`, or `CommandAborted` become TRUE.
	`Error`	`BOOL`	`TRUE`: Error occurred within the function block.
	`ErrorID`	`SMC_ERROR`	Error identification
	`RecordedPosition`	`LREAL`	Position, where trigger event has occurred (in technical units [u]).
	`CommandAborted`	`BOOL`	`TRUE`: Command has been aborted by another command.