CM579EcatCoeRead (FB)

FUNCTION_BLOCK CM579EcatCoeRead EXTENDS CM579EcatBase

Function block to read SDO object data

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Execute	BOOL	FALSE	A rising edge starts the operation, the output Busy goes to TRUE. In the first cycle all other inputs are read and stored, afterwards they are ignored. A falling edge does not stop the operation. After Done = TRUE or Error = TRUE and Execute = FALSE all outputs will be reset.	AbbETrig2
Output	Done	BOOL	FALSE	Operation is completed without error (while outputs Busy and Error are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE	AbbETrig2
	Busy	BOOL	FALSE	Operation is running (while outputs Done and Error are FALSE)	AbbETrig2
	Error	BOOL	FALSE	Operation is stopped with error (while outputs Busy and Done are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE. The output ErrorID gives more details about the error.	AbbETrig2
Input	Device	IDeviceCM579EtherCAT		CM579-ECAT coupler device	CM579EcatBase
Output	ErrorID	ERROR_ID		Error code describing error condition	CM579EcatBase
	AddErrNo	UDINT		Additional error code for detailed error description, will be set if ErrorID = ERROR_ID.ADDITIONAL_ERROR_INFO.	CM579EcatBase
Input	Node	UINT		NODE ID
	Index	UINT		Index of the SDO object
	SubIndex	BYTE		Subindex of the SDO object
	Len	UINT		Max length (in bytes) of data to be read
	Data	POINTER TO BYTE		Where to write the read SDO data
	Timeout	UINT		Timeout in milliseconds
Output	NumBytes	UDINT		Length in bytes of SDO data read

Methods:

CheckInputs

PrepareJob

ResetOutputsAndMembers

SetOutputs

Structure:

• CyclicAction
  • CM579EcatCoeRead.SetOutputs (METH)
• ResetAction
  • CM579EcatCoeRead.ResetOutputsAndMembers (METH)
• StartAction
  • CM579EcatCoeRead.CheckInputs (METH)
  • CM579EcatCoeRead.PrepareJob (METH)