關(guān)于開疆智能RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)KJ-PNG-201在通用變頻器與西門子S7-1200 PLC之間進(jìn)行通信配置的詳細(xì)案例。該案例包括配置步驟、參數(shù)設(shè)置、測(cè)試結(jié)果以及可能遇到的問(wèn)題和解決方案。案例內(nèi)容詳盡其他工程師能夠根據(jù)該案例成功復(fù)現(xiàn)配置過(guò)程。
案例簡(jiǎn)介:本案例描述了通過(guò)采用開疆智能的RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)來(lái)實(shí)現(xiàn)AC300通用變頻器與西門子S7-1200PLC的連接和配置。打開博圖軟件,導(dǎo)入并安裝gsd文件。選擇gsd文件所在的文件夾位置(例如桌面)并確認(rèn)后,系統(tǒng)會(huì)顯示安裝界面,點(diǎn)擊確定以完成安裝過(guò)程。安裝完成后,可以在指定地址找到安裝的RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)模塊。設(shè)置RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)的IP地址和設(shè)備名稱,確保這些參數(shù)與配置軟件中的設(shè)置保持一致。
開疆智能RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)配置步驟:確定RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)所需的輸入輸出字節(jié)長(zhǎng)度,并在完成所有參數(shù)的配置后,將配置下載到PLC中。參考從站的通訊應(yīng)用格式說(shuō)明圖示,進(jìn)行相關(guān)配置。根據(jù)案例分析,從站的功能地址為1,功能碼為03,讀取寄存器數(shù)量為2個(gè),這些參數(shù)是開始RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)配置的基礎(chǔ)。安裝并運(yùn)行RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)配置軟件。在新建項(xiàng)目時(shí)選擇PN2MRM3作為項(xiàng)目模板。在配置軟件中首先設(shè)置PN端的IP地址和設(shè)備名稱,確保這些信息與博途(TIA Portal)中的配置保持一致。確保配置軟件中的設(shè)備名稱與博途組態(tài)中的設(shè)備名稱完全一致。如果博途組態(tài)中的PROFINET設(shè)備名稱與轉(zhuǎn)換名稱不一致,應(yīng)按照轉(zhuǎn)換的名稱填寫到配置軟件中。
通過(guò)以上步驟,可以順利完成開疆智能RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)的配置。配置Modbus參數(shù),配置Modbus參數(shù)時(shí),確保485接口的設(shè)置與從站保持一致。如果啟用校驗(yàn)位,則數(shù)據(jù)位應(yīng)選擇9。此外,根據(jù)需要選擇輸出命令的輪詢模式,包括單次發(fā)送、連續(xù)發(fā)送或脈沖發(fā)送等選項(xiàng)。本例中采用的配置為波特率9600,數(shù)據(jù)位8,停止位1,無(wú)校驗(yàn)位。在ModbusRTU界面中,通過(guò)右鍵點(diǎn)擊并選擇插入節(jié)點(diǎn)來(lái)添加新節(jié)點(diǎn)。填寫節(jié)點(diǎn)地址時(shí),輸入從站的實(shí)際地址,此處為1。在已創(chuàng)建的節(jié)點(diǎn)上繼續(xù)右鍵操作以插入功能碼。如果對(duì)所選功能碼不確定,可以在界面右側(cè)的功能碼列表中確認(rèn)其正確性。
根據(jù)手冊(cè)中的示例,起始地址2100H需轉(zhuǎn)換為十進(jìn)制的8448,并且連續(xù)讀取兩個(gè)地址的數(shù)據(jù)。將這些信息填入相應(yīng)的字段中。內(nèi)存映射的起始地址與博途軟件中的IQ地址相對(duì)應(yīng)。在此實(shí)例中,I地址的范圍為68至83。當(dāng)?shù)刂窞?時(shí),寄存器地址8448的數(shù)據(jù)將被映射到IW68之后,并且數(shù)據(jù)將按順序依次排列。值得注意的是,在完成IP地址和設(shè)備名稱的配置后,需要將這些配置下載到開疆智能RS485Modbus轉(zhuǎn)Profinet網(wǎng)關(guān)上,并在重新通電后進(jìn)行配置才能生效。
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