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)
    • linux_libnodave_example.tar.gz (554 downloads)

  • 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: