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PLC,即可编程控制器,一种专为工业环境下应用而设计的数字运算操作的电子装置。在工业领域,随着信息技术和计算机技术的飞速发展,PLC在工业自动化控制领域的应用也越来越广泛,所涉及的行业也越来越多,如:钢铁、石油、化工、电力、建材、机械制造、纺织等行业都在使用着PLC。PLC的品牌如:西门子、三菱、AB、施耐德等,目前市场上占较大比重的还要数西门子PLC。西门子PLC是模块式PLC,有小型PLC(S7-200)、中型PLC(S7-300)和大型PLC(S7-400),我们应该根据现场实际需要来选择模块。这边我主要想讲的是中型PLC(S7-300)在电子皮带秤控制领域的应用。
PLC, a programmable logic controller, is an electronic device designed for digital computing in applications in industrial environments. In the field of industry, with the rapid development of information technology and computer technology, PLCs have become more and more widely used in industrial automation and control. More and more industries are involved, such as: steel, petroleum, chemical, electric power, building materials , Machinery manufacturing, textile and other industries are using PLC. PLC brands such as: Siemens, Mitsubishi, AB, Schneider, etc., the current market accounted for a larger share of the number of Siemens PLC. Siemens PLC is a modular PLC, a small PLC (S7-200), medium PLC (S7-300) and large PLC (S7-400), we should be based on the actual needs of the field to select the module. Here I mainly want to talk about the application of medium-sized PLC (S7-300) in the electronic belt scale control.