介紹了由西門子S7-300 PLC和工業PC機組成的四輥可逆實驗冷軋機計算機控制系統的硬件配置和軟件組成，詳細說明了該系統的過程數據測量、多檔張力控制、監控與數據采集和以此為基礎構成的實驗計算機系統。
[關鍵詞]實驗軋機；可編程控制器；多檔張力控制；
Multilevel-tension PLC control system of Φ90mm reversible experimental four high mill
JIN Long-guo （Dept of information engineering Qingdao vocational and technical college Qingdao, Shandong, 266555） YU Hui-min (Dept of Automation control, Benxi College of Metallurgy, Benxi , Liaoning , 117022 ) HAN Zhao (Dept of electric. Metallurgy dregs of Benxi Iron and steel Co, Benxi , Liaoning , 117021 ) Abstract: This paper first introduces the hardware and software configuration of a computer control system with SIEMENS S7-300 and industrial PC for a four-high reversible experimental cold mill , then particularizes the methods of process data measurement, multilevel-tension control, supervisory and data acquisition and the laboratory computer system base on the control system.
Key words: reversible cold mill ；Program logic controller；Multilevel-tension control