1746-NO8I
廈門(mén)卡庫(kù)電氣有限公司
【聯(lián)系人】: 嚴(yán)小姐
網(wǎng)絡(luò)通訊架構(gòu) 1、原交通隧道監(jiān)控系統(tǒng)網(wǎng)絡(luò)通訊架構(gòu)如下:

由上圖可看出初期交通隧道的設(shè)計(jì)都偏重于現(xiàn)場(chǎng)總線與以太網(wǎng)混合的復(fù)雜通訊結(jié)構(gòu)設(shè)計(jì),一方面程序設(shè)計(jì)人員在現(xiàn)場(chǎng)有較大的軟硬件調(diào)試工作量,一方面也增加了整個(gè)系統(tǒng)數(shù)據(jù)的采集難度。在中控室中并未設(shè)計(jì)到其它子系統(tǒng)與實(shí)時(shí)監(jiān)控系統(tǒng)之間的整合問(wèn)題,相互之間都是獨(dú)立的。將車檢器與LED大屏都考慮至現(xiàn)場(chǎng)以 PLC的通訊來(lái)解決數(shù)據(jù)采集與控制問(wèn)題,實(shí)際所得到的驗(yàn)證是不可靠、不靈活的,車檢數(shù)據(jù)的采集、轉(zhuǎn)發(fā)與存儲(chǔ)利用PLC的通訊方式很難取到較為準(zhǔn)確的統(tǒng)計(jì)數(shù)據(jù),以及LED大屏顯示常常要以ascii 碼的方式寫(xiě)一些天氣或致詞方面的漢字,由目前的常用的PLC是不能實(shí)現(xiàn)的,只能以調(diào)用已經(jīng)建立好的文字列表,以通訊協(xié)議方式來(lái)切換內(nèi)容的列表號(hào),而不能靈活的進(jìn)行漢字的輸入。 2、初始硬件通訊結(jié)構(gòu)設(shè)計(jì)決定了上位軟件所發(fā)揮的作用較為有限,隨著實(shí)際工程的驗(yàn)證后,目前的通訊網(wǎng)絡(luò)結(jié)構(gòu)已經(jīng)有了較大提升。
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