Man-machine interface system for a process controller

A man-machine interface system for a process controller, comprising:

• a display screen;
• a picture data controller for controlling pictures displayed on said display screen;
• a direct picture select button for requesting a display of an interrupt picture to set control requirements through said display screen and to monitor operative conditions of said process controller,
• whereby a specified picture is displayed on said display screen in response to the interrupt picture display request by said direct picture select button to display the interrupt picture;
• a first interrupt picture definition table enabling user specified settings to changeably define the interrupt picture displayed on said display screen in response to the interrupt picture display request by said direct picture select button;
• a second interrupt picture definition table for providing standard settings that unchangeably define the interrupt picture displayed on said display screen in response to the interrupt picture display request by said direct picture select button;
• a third interrupt picture definition table for providing definition of a latest displayed interrupt picture as the interrupt picture displayed on said display screen in response to the interrupt picture display request by said direct picture select button to display the interrupt picture;
• and
• a direct picture display mode select button for selecting one of said first, second, and third interrupt picture definition tables.