unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, CPort, StdCtrls, CPortCtl;

type
  TForm1 = class(TForm)
    Button1: TButton;
    ComPort1: TComPort;
    ComLed1: TComLed;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Déclarations privées }
  public
    { Déclarations publiques }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}


procedure TForm1.Button1Click(Sender: TObject);
var
tramemodbuscrc16:string;
begin
TrameModbusCRC16:=chr(01)+chr(03)+chr(00)+chr(09)+chr(00)+chr(01)+chr(54)+chr(08);
Comport1.WriteStr(TrameModbusCRC16);
end;


end.