1. Tang X H, Jiang Z Y. (2017) System PLC programming and debugging. In: Yun Q, Lihui P. (Eds.), Modern Electrical Control System Installation and Testing. China Railway Publishing House, Beijing. pp. 180-193.(in Chinese)
2. ZHANG X W. (2017) Man machine interface equipment and protal software automation engineering software. In: Lina S. (Eds.), Touch screen application technology from entry to mastery. Chemical Industry Press, Beijing. pp.1 (in Chinese)
3. LIAO C C. (2019) Hardware and working principle of human machine interface. In: Jing S. (Eds.), Siemens HMI (touch screen) configuration and Application Technology (3rd Edition). Mechanical Industry Press, Beijing. pp.1 (in Chinese)