Send timeout is set to 10 ms. Without timeout PLC can be blocked by CAN driver: if CAN bus is not connected to controller CAN driver never returns and therfore PLC application halts. This is a temporary solution.
// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//
#pragma once
#include "targetver.h"
#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
// Windows Header Files:
#include <windows.h>
//#include "co_can.h"
#include "public.h"
#include "can_driver.h"
#include "co_can_cinterface.h"
// TODO: reference additional headers your program requires here