Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario descargar pdf (Pagina 131)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-71

/* Wait 1 second for the EOS */

rc = OC_WaitForEosDmdIn(handle, 1000);

switch(rc) {

case SUCCESS: /* got EOS*/

/* reset the EOS_DMDIN event*/

OC_PollScanner (handle,OCMSG_EOS_DMDIN,&eosMSG);

/* do logic, etc. synchronized with the I/O scan */

break;

case ERR_OCRESPONSE:/* timed out */

printf(“\nTimed out waiting for EOS\n”);

break;

default;

printf(“\nError!\n”);

break;

}

OC_WaitForEosDmdOut

Blocks the calling thread until a demand output end-of-scan (EOS)

notification is received from the scanner or

msTimeout milliseconds

have elapsed.

Syntax:

int OC_WaitForEosDmdOut(HANDLE handle,

DWORD msTimeout)

Parameters:

Description:

If a demand output EOS message has been received since the last

OCMSG_EOS_DMDOUT message was retrieved with the

OC_PollScanner function, OC_WaitForEosDmdOut returns SUCCESS

immediately.

You can use this function to synchronize a control application with

the I/O scan. See the OC_EnableEOSNotify and

OC_DemandOutputScan functions.

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

msTimeout Specifies the number of milliseconds to wait

Set to INFINITE to wait forever

1 2 ... 126 127 128 129 130 131 132 133 134 135 136 ... 173 174

Sin comentarios

Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario Pagina 131