#16 Code does not work

[Savas Akyavas]

Hello,

Thank you for great API. It works perfectly fine.

I would like to write my own code. Just a simple one to send data to send a input register response to Vijeo Citect over Modbus TCP. Jamod does it very well but when I use my own code nothing happens.

My code :

import java.io.*;
import java.net.*;

public class Modbus extends Thread {

Socket s=null;
InputStream is=null;
byte[] b = new byte [12];
int i;

byte[] sb = new byte [11];
OutputStream os=null;

Modbus(Socket so) {

s=so;
}

public void run() {

try {
os = s.getOutputStream();

is = s.getInputStream();
is.read(b);

for(int l=0;l<12;l++) {

System.out.println(""+b[l]);
}

sb[0] = b[0];
sb[1] = b[1];
sb[5] = 5;
sb[6] = b[6];
sb[7] = b[7];
sb[8] = 2;
sb[9] = 00;
sb[10] = 01;

os.write(sb);
os.flush();
}

catch (Exception e) {

System.out.println("Error "+e);
}

finally {

try {

s.close();
}

catch (Exception e) {

System.out.println("Error "+e);
}
}
}

public static void main (String args[]) {

ServerSocket ss = null;
Socket socket = null;

try {
ss = new ServerSocket(502);
System.out.println("Listening");

while(true) {

socket = ss.accept();
System.out.println("Connection established");

new Modbus(socket).start();
}
}

catch (Exception e) {

System.out.println("hata "+e);
}

finally {

try {

socket.close();
ss.close();
}

catch (Exception e) {

System.out.println("Error "+e);
}
}

}
}

It does not work for a reason. Any idea why ?

I receive request as

00
00
00
00
00
06
00
03
00
00
00
01

Thanks