PLC應(yīng)用在樓宇自動化發(fā)布時(shí)間：12-12-19 來源： 點(diǎn)擊量：45859 更多
1.MDD090C-N-040-N2M-110GA1概 述
MDD090C-N-040-N2M-110GA1隨著生活的不斷改善，人們對住宅，辦公環(huán)境質(zhì)量的要求越來越高，例如在民用住宅里，物業(yè)需要對小區(qū)的燈光，給排水，電梯和車庫等小區(qū)必備設(shè)備進(jìn)行集中監(jiān)控。時(shí)下，房地產(chǎn)行業(yè)正如火如荼的發(fā)展，給小型PLC在樓宇自動化的使用創(chuàng)造了契機(jī)。本文著重介紹施耐德PLC Twido系列在樓宇自動化里的一些應(yīng)用，
2.MDD090C-N-040-N2M-110GA1應(yīng)用描述
在樓宇自動化里，人們對分散控制，集中管理的要求越來越明顯，主要體現(xiàn)在燈光，空調(diào)，給排水，電梯，門禁和灌溉等方面。在此，我們基于施耐德Twido PLC，給出三個方案。
(!)方案1-RS485，適用于小范圍，而且對通信速度要求不高
通過RS485串行連接，Modbus 串行協(xié)議實(shí)現(xiàn)，
模塊配置：本體 TWDLCAA24DRF
通信擴(kuò)展 TWDNAC485T
通信參數(shù)：波特率19.2k，8位數(shù)據(jù)位，奇/偶/無 校驗(yàn)，1位停止位。
優(yōu)點(diǎn)：組網(wǎng)簡單，成本低。
缺點(diǎn)：通信速率慢，監(jiān)控計(jì)算機(jī)與最遠(yuǎn)一個從站距離超過200米時(shí)需要加中繼
(2)方案2-以太網(wǎng)，適用于對通信速度較高場合
通過以太網(wǎng)，Modbus TCP/IP 協(xié)議實(shí)現(xiàn)
模塊配置： 本體 TWDLCAE40DRF 或者 其他Twido本體加 TwidoPORT以太網(wǎng)模塊
通信參數(shù)：波特率10M或100M
優(yōu)點(diǎn)：通信速度快，網(wǎng)絡(luò)節(jié)點(diǎn)個數(shù)不受限制，決定于網(wǎng)絡(luò)方案。
缺點(diǎn)：普通HUB或交換機(jī)端口到節(jié)點(diǎn)的長度不能超過100米，假如需要擴(kuò)大長度的話，需要對網(wǎng)絡(luò)進(jìn)行優(yōu)化，這樣就要求工程師具有較深的網(wǎng)絡(luò)知識。
(3)方案3-無線網(wǎng)絡(luò)，適用于對通信速度要求不高，但有無線通信要求
MDD090C-N-040-N2M-110GA1通過以太網(wǎng)，Modbus TCP/IP, CDMA 或GPRS 實(shí)現(xiàn)。
模塊配置：本體 TWDLCAE40DRF 或者 其他Twido本體加 TwidoPORT以太網(wǎng)模塊+IN ROOTER路由器
優(yōu)點(diǎn)：實(shí)現(xiàn)無線通信，可以用以多個小區(qū)甚至多個城市的集中管理
缺點(diǎn)：相對于方案2速度較慢，而且需要附加CDMA或者GPRS的通信費(fèi)用，另外需要購買INROOTER路由器。
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