Rockwell-automation 1747-PCIS API Software - Open Controller Bedienungsanleitung PDF herunterladen (Seite 111)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-51

Example:

HANDLE Handle;

WORD filedata[2];

int retcode;

retcode = OC_ReadModuleFile( Handle, FILTYP_M1, filedata,

6, 3, 2 );

/* Reads words 3 and 4 from module in slot 6. */

OC_ReadOutputImage

OC_ReadOutputImage reads the current output image from the

scanner.

Syntax:

int OC_ReadOutputImage(HANDLE handle, WORD *

outimgcpy, int slotnum,

WORD offset, WORD len, WORD *imagebuf);

Parameters:

Description:

Since the scanner never changes data in the output image, it is not

necessary to copy the image, as with the OC_ReadInputImage

function, to preserve file integrity. It is supported, however, to provide

a consistent interface.

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

outimgcpy If

outimgcpy

is:

NULL OC_ReadOutputImage reads data directly from

the output image in the scanner’s shared

memory.

not NULL OC_ReadInputImage reads data from

outimgcpy which contains a copy of the

scanner’s output image.

slotnum

offset

len

slotnum is:

positive the output image for that slot is read into the

array pointed to by

imagebuf. Then imagebuf

is filled with len words of output data starting

at word

offset of the module in the slot.

-1 the entire output image is read into the array

pointed to by

imagebuf

and offset and len

are ignored.

imagebuf Must point to an array that is large enough to accept the amount of

data in the requested output image

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 173 174

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