But under some circumstances , such as bad terrain , where it is difficult to pave wire line , where an emergency happens and need to build network quickly , where information security is desired and where lower cost is desired , wireless dcs will be a better solution 但在某些场合,如地形条件不好、铺设电光缆存在困难;要求应急快速组网或临时组网;要求传输信道有一定保密性;因传输距离远,布线经济上不合算和维护成本高等,无线dcs系统将是一个更好的解决方案。
With the development of industrial automation , distributed control system ( large , medium and small scale ) is applied widely in the field of petrochemical industry and electric power etc . the conventional dcss are connected all by wire line ( industrial lans ) between process control level and control management level , and between process control level and field apparatuses 随着工业自动化的发展,大、中、小型集散控制系统( dcs )在石油化工、电力等行业的应用越来越广泛。目前, dcs系统在过程控制级与控制管理级之间以及过程控制级同现场设备之间大多采用有线方式(局域网)来实现其数据通信功能。