Process line HMI system

Abstract

This HMI (3) renders on an HMI screen a process line which includes a movable looper group part (51) grouping at least one movable roll part and multiple line parts connected to said movable roll parts, and multiple fixed roll parts which connect to said movable looper group part (51). The HMI (3) continuously acquires the process line length from an output signal of a monitored device. The HMI (3) calculates the looper movement amount by dividing the difference between the process line total length and the aforementioned process line length by the number of the aforementioned multiple line parts that the aforementioned movable looper group part shares with the aforementioned multiple fixed roll parts. The HMI (3) changes the relative position of the multiple fixed roll parts and the movable looper group part (51) on the HMI screen depending on the looper movement amount.