MCV_Home

Reference point travel of the axis is commanded with the MCV_Home FB. MCV_Home extends the functionality of the PLCopen FB MC_Home with an additional input CamSignal which is evaluated as signal for the take-over of the referencing position. Normally, the source of "CamSignal" is the reference cam signal of the drive.

Notice
It is required that for correct function the parameter P-AXIS-00036 must be set to 0. If the take-over of the referencing position is done at rising or falling edge at `CamSignal` is set with the parameter P-AXIS-00038.

Block diagram

Parameters of the FB

VAR_IN_OUT
	Axis	AXIS_REF	Axis reference.
VAR_INPUT
	Execute	BOOL	Start the axis referencing at rising edge.
	CamSignal	BOOL	Signal for the take-over of the referencing position.
VAR_OUTPUT
	Done	BOOL	When axis referencing is finished, the output of "Done is TRUE and the axis is in state "Standstill.
	CommandAborted	BOOL	TRUE indicates that the referencing command has been aborted by another command.
	Error	BOOL	Indicates if an error has occurred.
	ErrorID	WORD	Error identification.

Behavior of the FB:

Commanding reference point travel is permissible only if the axis is in the Standstill state. If this is not the case, the Error output is set to FALSE and ErrorID indicates an error value that designates the state the axis is currently in.
No new command can be sent when this FB is active. It cannot be retriggered. If an attempt is nevertheless made to do this, the FB returns the error 44007 (ERR_PO_AX_HOMING_RETRIGGERD).
The axis changes to the Homing state directly after command of reference point travel.