Process line HMI system

A process line HMI system connected to a monitoring target device, the process line HMI system comprising:

• a display that displays a HMI screen, and
• at least one processor configured to:
• render a process line on the HMI screen, the process line including:
• a movable looper group part obtained by grouping at least one movable roll part and a plurality of line parts connected to the movable roll part;
• and
• a plurality of fixed roll parts connected to the movable looper group part;
• continuously obtain a process line current length from the monitoring target device;
• calculate a looper movement amount by dividing a difference between a process line total length and the process line current length by a number of parts in the plurality of line parts, wherein the plurality of line parts are shared by the movable looper group part with the plurality of fixed roll parts;
• and
• change a relative position between the plurality of fixed roll parts and the movable looper group part on the HMI screen according to the looper movement amount.