RCK_RegistrationBuffer (FB)

FUNCTION_BLOCK RCK_RegistrationBuffer

This function block is implemented to collect and store registrations which are marked on the cut material to show the proper cut position. the maximum amount of registration can be stored is specified by the global constant variable gciRegistrationBufferSize.

An external function block or program should be used to capture registrations, then done signal and result after captured should be correspondingly connected to inputs RegistrationDetected and DetectedPosition.

The detected registration will be ignored if it`s distance to the last one is greater than ExpectedInterval+MaxUpperOffset or lesser than ExpectedInterval-MaxLowerOffset when ExpectedInterval is greater than zero. One step further, the value that the position of last resgistration + ExpectedInterval+MaxUpperOffset will be stored as the newest registration if the moved distance of material is greater than ExpectedInterval+MaxUpperOffset but no new registration found.

Note

The unit of ExpectedInterval, MaxUpperOffset, MaxLowerOffset, DetectedPosition of registration must be the same unit as the unit of circumference of cutter set in RCK_Parameter.

InOut:

Scope	Name	Type	Initial	Comment
Input	Enable	BOOL	FALSE	Enable the function block with Enable = TRUE
	ExpectedInterval	LREAL	0.0	[u] The expected interval of each registration, usually it is the same as the cut length. Range: >=0
	MaxUpperOffset	LREAL	0.0	[u] The maximum acceptable upper offset when the actual interval is greater than the expected interval. Range: > 0 and < ExpectedInterval/2
	MaxLowerOffset	LREAL	0.0	[u] The maximum acceptable lower offset when the actual interval is lesser than the expected interval. Range: > 0 and < ExpectedInterval/2
	RegistrationDetected	BOOL	FALSE	The signal from external to indicate that a new registration is deteced
	DetectedPosition	LREAL	0.0	[u] the detected position of registration
Output	Stored	BOOL		Shows the new registration has been stored
	Busy	BOOL		Indicates that the function block is not finished
	Error	BOOL		Signals that error has occurred within function block
	AppErrorID	ERROR_ID		Error identification. For error details refer to Enumeration ERROR_ID
	StoredRegistrations	UDINT		Shows the number of registrations that are currently stored in buffer
	TotalStoredRegistrations	UDINT		Shows the number of registrations that are accepted after Enable is set True
	ConsecutiveLostRegistrations	UDINT		Shows the number of registrations that consecutively lost in the zone ExpectedInterval-MaxLowerOffset to ExpectedInterval+MaxUpperOffset
	TotalLostRegistrations	UDINT		Shows the number of registrations that lost in the zone ExpectedInterval-MaxLowerOffset to ExpectedInterval+MaxUpperOffset after Enable is set True
Inout	FeedAxis	Axis_Ref		Reference to feed axis