| 摘要 |
A method for secure servicing of a field device (FD) of process automation technology. The field device (FD) has a web server (WS), via which the field device (FD) can be serviced, wherein the field device (FD) has a function (CAPTCHA) for distinguishing computers from humans, wherein, upon an accessing of the field device (FD) via the web server (WS), the function (CAPTCHA) for distinguishing computers from humans is executed, in order to assure that the accessing of the field device (FD) is being done by a human user. |
