Rockwell Automation 6001-F2E AB STANDARD DRIVER SFTW - Manual (Page 29)

Application Program Examples
Appendix A
A-7
/* Call the Standard Driver Appl() function */
status = Appl_StdDrv( PLC_FCT, &DHP_MSG);
/*status = See 6001–F2E User’s manual appendix D
io_stat[0]: Local & remote I/O status
Hi_byte = DH-485 status
Lo_byte = Local & extended DH-485 status
io_stat[1]: Reply length in bytes (if applicable)
Binary address format: dt_addr[0] = lo_byte, dt_addr[1] = hi_byte
*/