Synchronization - Rockwell Automation Allen-Bradley ControlLogix 1756-MVI Programming Reference Manual

3-18 MVI Backplane API
Publication 1756-RM004B-EN-P - October 2000

Synchronization

MVIbp_WaitForInputScan
Syntax:
int MVIbp_WaitForInputScan(MVIHANDLE handle, WORD timeout);
Parameters:
handle handle returned by previous call to MVIbp_Open
timeout maximum number of milliseconds to wait for scan
Description:
This function is not supported for the 1756-MVI and will return
MVI_ERR_NOTSUPPORTED.
Return Value:
MVI_SUCCESS
MVI_ERR_NOACCESS
MVI_ERR_TIMEOUT
Example:
MVIHANDLE Handle;
/* Wait here until input scan, 50ms timeout */
rc = MVIbp_WaitForInputScan(Handle, 50);
if (rc == MVI_ERR_TIMEOUT)
printf("Input scan did not occur within 50 milliseconds\n");
else
printf("Input scan has occurred\n");
See Also:
MVIbp_WaitForOutputScan
the input scan has occurred
handle does not have access
the timeout expired before an input scan
occurred