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阐述了传统的分散控制系统 (DCS)的优缺点 ,以及现场总线控制系统(FCS)对它的改进 ,指出现场总线是工业过程控制更好的选择。而在DCS向FCS过渡的过程中 ,急需解决传统仪表与现场总线的接口问题。针对这一问题 ,开发了一种现场总线—电流转换器 ,并具体的介绍了转换器的工作原理、芯片的选择和接口电路的实现
The advantages and disadvantages of the traditional decentralized control system (DCS) and the improvements made by the fieldbus control system (FCS) are described. It is pointed out that the field bus is a better choice for industrial process control. However, during the transition from DCS to FCS, it is urgent to solve the interface problem between traditional instruments and field bus. In response to this problem, a field bus - current converter has been developed, and the working principle of the converter, chip selection and interface circuit implementation