DCS多層分級(jí)控制系統(tǒng)
DCS的基本設(shè)計(jì)思想是采用控制分散、操作和管理集中的思路,實(shí)現(xiàn)多層分級(jí)控制和合作的結(jié)構(gòu)。目前,主要應(yīng)用在冶金、電力和石化等領(lǐng)域。
DCS 是實(shí)現(xiàn)多層分級(jí)控制的系統(tǒng),在使用的過(guò)程中具有兩個(gè)基本的分級(jí)環(huán)節(jié):現(xiàn)場(chǎng)控制單元和操作站。
DCS基本分級(jí)環(huán)節(jié)
● 現(xiàn)場(chǎng)控制單元:
指遠(yuǎn)離控制中心而在現(xiàn)場(chǎng)附近使用的控制系統(tǒng),可根據(jù)DCS本身機(jī)構(gòu)實(shí)現(xiàn)對(duì)現(xiàn)場(chǎng)的監(jiān)控和控制,F(xiàn)場(chǎng)控制單元的使用需要準(zhǔn)備不同的設(shè)備,如配置插件,即根據(jù)系統(tǒng)的要求配置相應(yīng)的中央處理器插件、電源插件和通信插件等,為后期的分級(jí)控制奠定基礎(chǔ);
冗余配置是分級(jí)控制系統(tǒng)中重要的環(huán)節(jié)之一,在配置的過(guò)程中要對(duì)主機(jī)插件、電源插件和通信插件等實(shí)現(xiàn)冗余配置;實(shí)現(xiàn)隨現(xiàn)場(chǎng)的分級(jí)控制和監(jiān)測(cè)需要對(duì)不同的硬件添加DCS,確保分級(jí)控制的可靠性。
● 操作站:
操作站中記錄并顯示控制系統(tǒng)中的不同數(shù)據(jù),是展示人機(jī)交互的場(chǎng)所,常用的操作站中包括系主機(jī)控制、顯示設(shè)備和鍵盤(pán)輸入設(shè)備等,是主要使用人工操作記錄和反饋的場(chǎng)所,主要實(shí)現(xiàn)顯示不同數(shù)據(jù)、報(bào)警和操作等多種重要功能。
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