Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 114)

6–60 Library of Routines OC_ReadOutputImage
Publication 1747-6.5.3 June 1998
Example:
HANDLE Handle;
WORD outputdata[2];
int retcode;
retcode = OC_ReadOutputImage( Handle, NULL, 6, 0, 2, outputdata );
/* Read slot 6 data, first 2 words, directly from the output image */
/* table to outputdata buffer */