16. March 2016  |    13 Comments

Linux Libnodave example read data from Siemens S7-300

I used Linux Min 17.3, so you can do the same with other Debian based distribution.

  • Step 1 : install mono-complete

    • sudo apt-get install mono-complete
    • if you want to compile libnodave lib by your self, install c develeop headers
      • sudo apt-get install libc6-dev

  • Step 2: download and compile libnodave http://libnodave.sourceforge.net/

    • tar xzf libnodave.*.tar.gz
    • cd libnodave
      • if you are using x64 OS, you need to add CFLAG -fPIC
      • just open Makefile, find the line “CFLAGS” and add at the end -fPIC
      • make clean
      • make

  • Step 3: Now copy libnodave.so and libnodave.net.dll to you project directory

  • Step 4:

    • now create your Program, or use my from example (btw: you can download all files, link is below)
      • [download id=”191″]
    • using System;
using System.Threading;
using System.Collections.Generic;
using System.ComponentModel;

public class S7reader
{
    public static void Main(string[] args){
        libnodave.daveOSserialType fds;
        libnodave.daveInterface di;
        libnodave.daveConnection dc;
        int res=0;
        
        try{
            fds.rfd = libnodave.openSocket (102, "192.168.1.60");
            fds.wfd = fds.rfd;

            if (fds.rfd > 0) {
                di = new libnodave.daveInterface (fds, "IF1", 0, libnodave.daveProtoISOTCP, libnodave.daveSpeed500k);
                di.setTimeout (10000);//10 seconds
                dc = new libnodave.daveConnection (di, 0, 0, 2);
                if (0 == dc.connectPLC ()) {
                    while (fds.rfd>0) {
                        res = dc.readBytes (libnodave.daveDB, 100, 12, 4, null);
                        if (res == 0) {
                            float tmp = dc.getFloat();
                            Console.WriteLine("DB100.DBD12: "+tmp);
                        }
                        Thread.Sleep (1500);
                    }
                }
            } else {
                
                Console.Error.WriteLine(DateTime.Now + " :: Error");
            }
        }catch(Exception exc){
            Console.Error.WriteLine(DateTime.Now + "Exception: "+exc);
        }
    }
}
  • Step 5: compile this example 
    • mcs S7reader.cs -r:libnodave.net.dll -out:./S7reader
  • Step 6: run the program 
    • mono S7reader
  • Step 7: create you own application

Short Video with all steps:

 

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