MODBUS TCP SLAVE

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ScktComp, StdCtrls;
 
type
  TForm1 = class(TForm)
    M: TMemo;
    Server: TServerSocket;
    Button4: TButton;
    Button5: TButton;
    procedure Button4Click(Sender: TObject);
    procedure ServerAccept(Sender: TObject; Socket: TCustomWinSocket);
    procedure ServerClientConnect(Sender: TObject;
      Socket: TCustomWinSocket);
    procedure ServerClientDisconnect(Sender: TObject;
      Socket: TCustomWinSocket);
    procedure ServerClientError(Sender: TObject; Socket: TCustomWinSocket;
      ErrorEvent: TErrorEvent; var ErrorCode: Integer);
    procedure ServerClientRead(Sender: TObject; Socket: TCustomWinSocket);
    procedure ServerClientWrite(Sender: TObject; Socket: TCustomWinSocket);
    procedure ServerGetSocket(Sender: TObject; Socket: Integer;
      var ClientSocket: TServerClientWinSocket);
    procedure ServerListen(Sender: TObject; Socket: TCustomWinSocket);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
  BufOut:array[1..12] of byte;
  BufIn:array[1..12] of byte;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Button4Click(Sender: TObject);
begin
server.Active:=true;
end;
 
procedure TForm1.ServerAccept(Sender: TObject; Socket: TCustomWinSocket);
begin
m.Lines.Add('--ACCEPT--');
end;
 
procedure TForm1.ServerClientConnect(Sender: TObject;
  Socket: TCustomWinSocket);
begin
m.Lines.Add('--CONNECT--');
end;
 
procedure TForm1.ServerClientDisconnect(Sender: TObject;
  Socket: TCustomWinSocket);
begin
m.Lines.Add('--DISCONNECT--');
end;
 
procedure TForm1.ServerClientError(Sender: TObject;
  Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
  var ErrorCode: Integer);
begin
m.Lines.Add('====ERRORE=== '+inttostr(errorcode));
errorcode:=0;
end;
 
procedure TForm1.ServerClientRead(Sender: TObject;
  Socket: TCustomWinSocket);
var s : byte;
  begin
m.Lines.Add('read');
s:=server.Socket.ReceiveLength;
m.Lines.Add(inttostr(s));
end;
 
procedure TForm1.ServerClientWrite(Sender: TObject;
  Socket: TCustomWinSocket);
  var s:byte;
  begin
m.Lines.Add('write');
end;
 
procedure TForm1.ServerGetSocket(Sender: TObject; Socket: Integer;
  var ClientSocket: TServerClientWinSocket);
begin
m.Lines.Add('getsocket');
end;
 
procedure TForm1.ServerListen(Sender: TObject; Socket: TCustomWinSocket);
begin
m.Lines.Add('Server listen');
end;
 
end.