【正文】
k Ex [i] PS 接線架 marshalling rack 接線盒 junction box 典型總線結(jié)構(gòu) Typical Fieldbus Architecture PROFIBUSPA PROFIBUSDP RS485 Coupler/ Link PROFIBUSPA IEC 611582 Controller PC FOUNDATION Fieldbus High Speed Ether Linking Device FF IEC 611582 Controller PC FF FF Systemintegration with couplers/links to PROFIBUSDP (up to 12 Mbit/s) 系統(tǒng)通過耦合器 /鏈接器集成至 ProfibusDP Direct system integration or linking devices 直接系統(tǒng)集成或連接裝置 Parallel use of DP and PA field devices DP和 PA現(xiàn)場(chǎng)設(shè)備平行使用 High Speed Ether (100 Mbit/s) 高速以太網(wǎng) Linking Device 循環(huán)數(shù)據(jù)傳輸 Cyclic (scheduled) Data Transmission PROFIBUSPA FOUNDATION Fieldbus GSD (DDB) Master 主機(jī) DD Arbitrator 仲裁 主機(jī)控制數(shù)據(jù)交換(中央控制機(jī)理) One cyclic master controls data exchange (Central Control Philosophy) 現(xiàn)場(chǎng)設(shè)備直接進(jìn)行數(shù)據(jù)交換 Direct data exchange between field devices possible (Distributed Control Philosophy) 從站通過 GSD進(jìn)行描述 Slaves are described by GSD (Device Data B