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  try
    TCPClient.Host := Host;
    TCPClient.Port := Port;
    TCPClient.Connect(5000);

    if not TCPClient.Connected then
    begin
      ...// raise exception
    end;

    buffer := 'STATUS?';
    TCPClient.WriteLn(buffer);
    buffer := TCPClient.ReadLn(#10, 2000); // <------ hier hängt es fest

    if TCPClient.ReadLnTimedOut then
    begin
      ...// raise exception
    end
  except
    ...
  end;