A tutorial on how to install the C/C++ Tools for SCADAPack and a demo on how to read and write to Modbus address.

Below is the snippet of the program that is demonstrated on the vlog.

#include <ctools.h>
#include "nvMemory.h"
extern "C"
{
   // add prototypes here
}

int main(void)
{
   //fprintf(com2, "hello, world\r\n");     // Output to serial port COM2

   BOOLEAN status1, status2;
   INT16 dintTest01 = 0;

   while (TRUE)
   {
      request_resource(IO_SYSTEM);
      status1 = databaseRead(MODBUS, 41992, &dintTest01);
      status2 = databaseWrite(MODBUS, 41994, dintTest01);
      release_resource(IO_SYSTEM);
   }
}

Reference

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I am a software developer in Calgary, Alberta, Canada with passion in getting my fingers in any new technology. I have been doing software development when 10 years old and have never looked back. Now with well over 30 years of software development, I wanted to share some of these key knowledge with the people of the world in the wide web.