Description
FCS
（1）基本任务是：本质（本征）安全、危险区域、易变过程、难于对付的非常环境。
（2）全数字化、智能、多功能取代模拟式单功能仪器、仪表、控制装置。
（3）用两根线联接分散的现场仪表、控制装置、PID与控制中心，取代每台仪器两根线。
（4）在总线上PID与仪器、仪表、控制装置都是平等的。
（5）多变量、多节点、串行、数字通信系统取代单变量、单点、并行、模拟系统。
（6）是互联的、双向的、开放的取代单向的、封闭的。
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