Prosoft-technology MVI56E-LDM Manual de usuario descargar pdf (Pagina 117)

ControlLogix Platform ♦ "C" Programmable CIP API Functions

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 111 of 264

March 12, 2014

daType

Data type code (OCX_CIP_DINT, etc).

eleSize

Size of a single data element (DINT=4, BOOL=1, etc).

opType

OCX_CIP_TAG_READ_OP or OCX_CIP_TAG_WRITE_OP.

numEle

Number of elements to read or write - must be 1 if not array

data

Pointer to read/write data buffer. Strings are expected to be

in OCX_CIP_STRING82_TYPE format. The size of the data is

assumed to be numEle * eleSize.

wrMask

Write data mask. Set to NULL to execute a non-masked

write. If a masked write is specified, numEle must be 1 and

the total amount of write data must be 8 bytes or less. Only

signed and unsigned integer types may be written with a

masked write. Only data bits with corresponding set wrMask

bits will be written. If a wrMask is supplied, it is assumed to be

the same size as the write data (eleSize * numEle).

result

Read/write operation result (output). Set to OCX_SUCCESS if

operation successful, else if failure. This value is not set if

the function return value is other than OCX_SUCCESS or opType

is OCX_CIP_TAG_NO_OP.

Return Value

OCX_SUCCESS

operation was successful

else

An access error occurred. Individual access result parameters not

set.

Example

OCXHANDLE Handle;

OCXCIPTAGACCESS ta1;

OCXCIPTAGACCESS ta2;

OCXCIPTAGACCESS * pTa[2];

INT32 wrVal;

INT16 rdVal;

int rc;

ta1.tagName = "dintArr[2];

ta1.daType = OCX_CIP_DINT;

ta1.eleSize = 4;

ta1.opType = OCX_CIP_TAG_WRITE_OP;

ta1.numEle = 1;

ta1.data = (void*) &wrVal;

ta1.wrMask = NULL;

ta1.result = OCX_SUCCESS;

wrVal = 123456;

ta2.tagName = "intVal";

ta2.daType = OCX_CIP_INT;

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