There are two parts of content in level 2 system:
Gateway- Grade 2 data exchanging center processes programs about all data exchanging from grade 1 and 2, grade 4 and 2. This gateway program is the core of grade 2 system, which is responsible for all data and communications management of grade 1 and 2, grade 4 and 2. This program includes an interface so as to visualize and manipulate it for customers.
HMI Grade Two Interface- The operator adjusts production plans through the interface, observes relative information about production line grade 2, and then collates production data and send it to grade 3.