你是否曾經(jīng)遇到過這樣的問題:如何在不改變現(xiàn)有網(wǎng)絡(luò)架構(gòu)的情況下,將Profibus總線側(cè)的從站接入以太網(wǎng)側(cè)的ModbusTcp網(wǎng)絡(luò)呢?
遠(yuǎn)創(chuàng)智控YC-DPM-TCP網(wǎng)關(guān)就是你的得力助手!它可以在Profibus總線側(cè)實(shí)現(xiàn)主站功能,在以太網(wǎng)側(cè)實(shí)現(xiàn)ModbusTcp服務(wù)器功能。只需要通過YC-DPM-TCP網(wǎng)關(guān),就可以將Profibus DP從站輕松接入到ModbusTcp網(wǎng)絡(luò),實(shí)現(xiàn)數(shù)據(jù)互通。如果你還需要將Profibus PA從站接入ModbusTcp網(wǎng)絡(luò),也沒問題!只需要增加DP/PA耦合器即可。
1.1、產(chǎn)品特點(diǎn)
◆ 支持Profibus DPV0循環(huán)報(bào)文通信;
◆ Profibus傳輸速率最大3Mbps,ModbusTcp以太網(wǎng)為 10/100M自適應(yīng);
◆ 支持Profibus PA要求的45.45k或93.75k波特率;
◆ 支持Modbus讀功能碼03H、04H,支持Modbus寫功能碼06H、10H;
◆ Profibus采用2500Vrms高速磁耦合隔離保護(hù)電路;
2, Profibus、以太網(wǎng)、電源三端電氣隔離,并且三個(gè)端口具備抗600W雷電、浪涌能力;
◆ 電源輸入范圍寬,并支持反接、過壓、過流、過熱保護(hù)功能;
◆ 具備LED狀態(tài)指示燈,方便用戶查看狀態(tài);
◆ 內(nèi)置獨(dú)立看門狗,增強(qiáng)設(shè)備抗干擾能力;
◆ 提供導(dǎo)軌(35mm DIN Rail)安裝方式。
3、遠(yuǎn)創(chuàng)智控YC-DPM-TCP網(wǎng)關(guān)工作原理
在Profibus組態(tài)工具中完成對(duì)Profibus從站設(shè)備的組態(tài)生成配置文件,然后通過網(wǎng)關(guān)配置軟件,將配置文件下載到Y(jié)C-DPM-TCP,YC-DPM-TCP會(huì)根據(jù)配置參數(shù)自主執(zhí)行與從站的通信。當(dāng)組態(tài)列表里的所有Profibus從站連接成功并進(jìn)入數(shù)據(jù)交換狀態(tài)后,YC-DPM-TCP面板上的PB燈會(huì)常亮;當(dāng)組態(tài)列表里的任意一個(gè)Profibus從站離線或通信有錯(cuò)誤,PB燈就會(huì)閃爍以提示Profibus通信故障。
4, 遠(yuǎn)創(chuàng)智控YC-DPM-TCP在Profibus總線側(cè)作為Profibus主站,和Profibus從站通過DPV0循環(huán)報(bào)文進(jìn)行數(shù)據(jù)交換。YC-DPM-TCP將輸出數(shù)據(jù)區(qū)數(shù)據(jù)寫入各個(gè)Profibus從站,同時(shí)讀入各個(gè)Profibus從站的數(shù)據(jù)并更新到輸入數(shù)據(jù)區(qū)。
5, 在ModbusTcp總線側(cè)YC-DPM-TCP作為ModbusTcp服務(wù)器,隨時(shí)響應(yīng)ModbusTcp客戶端的數(shù)據(jù)請(qǐng)求。YC-DPM-TCP將其Profibus輸入輸出數(shù)據(jù)區(qū)映射為ModbusTcp寄存器,ModbusTcp客戶端通過讀寫YC-DPM-TCP輸入輸出數(shù)據(jù)區(qū)實(shí)現(xiàn)對(duì)各個(gè)Profibus從站的讀寫操作,從而實(shí)現(xiàn)ModbusTcp和Profibus總線的數(shù)據(jù)交換。
6, YC-DPM-TCP輸出數(shù)據(jù)區(qū)是各個(gè)Profibus從站輸出數(shù)據(jù)的映射,存放寫入Profibus從站的數(shù)據(jù)。輸出數(shù)據(jù)區(qū)同時(shí)又映射為若干個(gè)Modbus寄存器,可用06H、10H功能碼寫和03H、04H功能碼讀。
7, YC-DPM-TCP輸入數(shù)據(jù)區(qū)是各個(gè)Profibus從站輸入數(shù)據(jù)的映射,存放讀入的Profibus從站數(shù)據(jù),只能用03H、04H功能碼讀,不能被改寫。
YC-DPM-TCP輸入輸出數(shù)據(jù)區(qū)在ModbusTcp端的寄存器協(xié)議地址從0(即PLC格式地址3x0001和4x0001)開始映射,并且按Profibus從站地址由小到大的順序依次排列。每個(gè)Profibus從站在YC-DPM-TCP網(wǎng)關(guān)內(nèi)映射的ModbusTcp寄存器起始地址和寄存器數(shù)量可在配置軟件中進(jìn)行查詢。
8, 由于Profibus的最小數(shù)據(jù)單位是Byte,ModbusTcp的最小數(shù)據(jù)單位是Word(一個(gè)寄存器),所以存在某些Profibus從站數(shù)據(jù)字節(jié)數(shù)是奇數(shù)不能映射為整數(shù)個(gè)Word寄存器的問題。為解決此問題,YC-DPM-TCP在分配Profibus從站數(shù)據(jù)緩存時(shí),如果數(shù)據(jù)字節(jié)數(shù)是奇數(shù)會(huì)多分配一個(gè)字節(jié),保證分配給所有Profibus從站的數(shù)據(jù)字節(jié)數(shù)都是偶數(shù)。
遠(yuǎn)創(chuàng)智控YC-DPM-TCP網(wǎng)關(guān)幫你輕松解決數(shù)據(jù)交互問題,讓你的網(wǎng)絡(luò)架構(gòu)更加靈活、高效。歡迎到遠(yuǎn)創(chuàng)智控官網(wǎng)了解更多信息,并可在評(píng)論區(qū)留言分享你的想法和經(jīng)驗(yàn)!
審核編輯:湯梓紅
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