SMC_ReadNCQueue (FB)¶

FUNCTION_BLOCK SMC_ReadNCQueue

This FB is used for files created with Codesys V2.3; To write the queue to a file or to read the queue from a file: the FBs SMC_WriteQueueToFile and SMC_ReadQueueFromFile from SM3_Debug library can be used. This function block will read an SMC_OUTQUEUE file, which has been created by the CNC editor, from the PLC file system and provide an OutQueue structure, which typically is processed by the decoder.

InOut:

Scope	Name	Type	Initial	Comment
Input	`bExecute`	`BOOL`	FALSE	Rising edge: Starts execution. While `TRUE`, the function block stays active
	`sFileName`	`STRING(255)`	‘’	File path
	`pBuffer`	POINTER TO BYTE		Pointer on a sufficiently large, free data area (buffer) that is allocated in the IEC application.
	`dwBufferSize`	`DWORD`	0	Size of the buffer in byte
Output	`bDone`	`BOOL`	FALSE	`TRUE`, if execution finished sucessfully.
	`bBusy`	`BOOL`	FALSE	`TRUE`, while execution of function block is not finished
	`bError`	`BOOL`	FALSE	Signals, that an error has occurred within the function block
	`ErrorID`	`SMC_ERROR`	0	Error identification
	`poqDataOut`	POINTER TO SMC_OUTQUEUE		Pointer on queue that has been read in.
	`iObjectsRead`	`UDINT`	0	Number of SMC_GEOINFO objects, which have been read and written to the queue up to now.

Structure:

CloseFile (Action)