廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
聯(lián)系方式:張工查看聯(lián)系方式
更新時(shí)間:2018-05-03 08:10:22瀏覽次數(shù):154
聯(lián)系我們時(shí)請(qǐng)說明是環(huán)保在線上看到的信息,謝謝!
1:什么是通訊協(xié)議?
通信協(xié)議是指通信雙方的一種約定。約定包括對(duì)數(shù)據(jù)格式、同步方式、傳送速度、傳送步驟、檢糾錯(cuò)方式以及控制字符定義等問題做出統(tǒng)一規(guī)定,通信雙方必須共同遵守。因此,也叫做通信控制規(guī)程,或稱傳輸控制規(guī)程,它屬于ISO'SOSI七層參考模型中的數(shù)據(jù)鏈路層。和利時(shí)支持profibus、FF、CanOpen、Lonworks等
1747-PBASE---1747-PBASE
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2:現(xiàn)場(chǎng)信號(hào)出現(xiàn)問題如何辦?
現(xiàn)場(chǎng)信號(hào)的問題主要有以下幾個(gè)方面
! 測(cè)量元件壞;
! 變送器故障;
! 連線問題,包括信號(hào)線接反、松動(dòng)、脫落、傳輸過程中接地及傳輸過程中受干擾影響耦合出超出系統(tǒng)可以接受的干擾等等。
總之,從信號(hào)測(cè)量、發(fā)送,到MACS接線端子,這中間任何一個(gè)環(huán)節(jié)出錯(cuò),所造成的結(jié)果都表現(xiàn)為數(shù)據(jù)顯示有誤。
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