電表DLT645協(xié)議與WINCC通過(guò)Modbus TCP/IP實(shí)現(xiàn)485通訊的方法
該項(xiàng)目采用捷米特JM-MD-DLT網(wǎng)關(guān),此網(wǎng)關(guān)提供4個(gè)485通訊接口,項(xiàng)目中每一個(gè)接口帶了10塊電表,用了2個(gè)接口
主要功能
網(wǎng)關(guān)可采集(DL/T698/645)設(shè)備數(shù)據(jù)
采集的數(shù)據(jù)可轉(zhuǎn)換成(Modbus從站協(xié)議)轉(zhuǎn)發(fā)
網(wǎng)關(guān)接口有232、485、網(wǎng)口、4G可選
可根據(jù)實(shí)際采集數(shù)據(jù)的個(gè)數(shù)選擇相應(yīng)的網(wǎng)關(guān)
具體步驟:
1、打開(kāi)捷米特網(wǎng)關(guān)JM-MD-DLT配置軟件,設(shè)置為和PLC、PC同一網(wǎng)段下,同時(shí)設(shè)置好波特率等數(shù)據(jù),然后通過(guò)交換機(jī)等設(shè)備實(shí)現(xiàn)三者互聯(lián)(如下圖):
2、打開(kāi)網(wǎng)關(guān)JM-MD-DLT配置文件,在文件中輸入電表號(hào),分配每個(gè)數(shù)據(jù)地址,并將配置文件導(dǎo)入到網(wǎng)關(guān)。
中(如下圖):
3、在WINCC中加入驅(qū)動(dòng)器Modbus TCP/IP,建立與網(wǎng)關(guān)JM-MD-DLT的通訊連接,注意不要選擇下面那個(gè)“轉(zhuǎn)換字類型數(shù)據(jù)為16位數(shù)值”,如果選擇最終顯示結(jié)果不正確,是高低字節(jié)顛倒的問(wèn)題(如下圖):
4、建立變量,地址為網(wǎng)關(guān)JM-MD-DLT配置時(shí)所分配地址,然后就可以像PLC變量一樣顯示、歸檔等等(如下圖):
以上就是此次項(xiàng)目的實(shí)現(xiàn)方法。
審核編輯:湯梓紅
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