Different DCS manufacturers and systems can be selected according to different processes. International brand manufacturers mainly include ABB, AB, Yokogawa, Honeywell and Siemens, while domestic brands mainly include Hollysys, Zhejiang University Kong Zhong and Zhejiang University Neutron. Chemical industry generally belongs to continuous control, and the systems of Yokogawa, Honeywell and Hollysys are generally selected. ABB is mainly used for power control, and Siemens' system is generally used in metallurgical industry. Different control environments need to choose the appropriate control system, which is the key to choose the system. The main domestic DCS manufacturers are: Shanghai Xinhua, Nanjing Keyuan Automation Group Co., Ltd., Hangzhou Youwen, Zhejiang Kong Zhong, Hollysys, Zhejiang VIA, Ziyi, Luneng Control, Guodian Shen Zhi, Shanghai Wenhua, Shanghai Lehua, Zheng Tai Zhongzi, etc.
Abroad: Westinghouse, Emerson, Foxboro, ABB, Siemens, Honeywell, Yokogawa, Rockwell, Wu Shan-Honeywell, Fisher-Rosemount, etc. Abroad: Westinghouse, Emerson, Foxboro, ABB, Siemens, Honeywell, Yokogawa, Rockwell, Wu Shan-Honeywell, Fisher-Rosemount, etc.