三菱plc通訊協議是什么?三菱plc編程口協議是什么意思?
三菱PLC 以太網通訊是什么協議的
MC協議。
可以通過MX控件實現通訊(xun)和二次開發。
也可(ke)以通過(guo)轉換模塊,轉成modbusTCP這(zhe)種開放的協議。
三菱PLC通訊有協議跟無協議通訊的區別在哪?
1)有協議:是(shi)三菱(ling)公司已經寫在(zai)PLC內部的操行(xing)協議
使(shi)用有協議通訊是(shi)
不必專門寫
接(jie)收(shou)和發送程序
2)無協議(yi):就是協議(yi)自己來(lai)編寫,接收和發送數據的管理
需要(yao)自己編寫程序(xu)來實現。
三菱plc編程口協議是什么意思?
三菱plc如(ru)何建立modbus通信,就(jiu)拿fx系列的plc來說,首先通信設備(bei)有兩(liang)種(zhong),一種(zhong)是后(hou)(hou)綴為bd的板子(zi)(通信板),一種(zhong)是后(hou)(hou)綴為adp的板子(zi)(通信適配(pei)器(qi)),兩(liang)者區別后(hou)(hou)者價(jia)格較(jiao)貴,通信距離長,支(zhi)持(chi)的協議(yi)多,如(ru)下(xia)圖:
可以(yi)看出凡是(shi)bd通(tong)(tong)(tong)(tong)信(xin)(xin)板(ban)就是(shi)功能擴展板(ban)支(zhi)持(chi)的(de)(de)(de)功能,adp通(tong)(tong)(tong)(tong)信(xin)(xin)適配器都支(zhi)持(chi),但modbus通(tong)(tong)(tong)(tong)信(xin)(xin)bd板(ban)是(shi)不支(zhi)持(chi)的(de)(de)(de)。這里我們(men)舉兩(liang)個例子(zi),就是(shi)plc與plc之間的(de)(de)(de)通(tong)(tong)(tong)(tong)信(xin)(xin)和plc與外部設備(變(bian)頻器)的(de)(de)(de)通(tong)(tong)(tong)(tong)信(xin)(xin),plc與plc之間的(de)(de)(de)通(tong)(tong)(tong)(tong)信(xin)(xin)包括三菱(ling)plc之間通(tong)(tong)(tong)(tong)信(xin)(xin)和三菱(ling)plc與其(qi)他(ta)牌(pai)子(zi)plc間的(de)(de)(de)通(tong)(tong)(tong)(tong)信(xin)(xin),同樣plc與變(bian)頻器也(ye)是(shi)三菱(ling)和其(qi)他(ta)牌(pai)子(zi)的(de)(de)(de)。
1plc與(yu)plc之間的通(tong)信
三(san)菱plc之間(jian)的(de)通信(xin)采(cai)用(yong)bd板(ban)子如RS485接(jie)口的(de)-485BD通信(xin)板(ban)來實現,可采(cai)用(yong)N:N網(wang)(wang)絡(luo),最多支持(chi)8臺(tai)plc之間(jian)的(de)數(shu)據鏈接(jie),也(ye)可以(yi)采(cai)用(yong)485adp實現。另(ling)外如果超過(guo)8臺(tai),N:N網(wang)(wang)絡(luo)則不支持(chi),可以(yi)采(cai)用(yong)modbus通信(xin),此(ci)時必須選(xuan)擇485adp完成,bd板(ban)子不支持(chi),指令無效。而三(san)菱plc與其(qi)他牌子的(de)plc的(de)通信(xin)就(jiu)不能使用(yong)N:N網(wang)(wang)絡(luo)了(le),它是三(san)菱專用(yong)的(de),這時候就(jiu)只能用(yong)adp通信(xin)板(ban)采(cai)用(yong)modbus實現。
2plc與變頻(pin)器的通信
三(san)菱plc與(yu)三(san)菱變(bian)(bian)頻(pin)(pin)(pin)器(qi)通(tong)(tong)(tong)(tong)信(xin)可(ke)(ke)以選擇變(bian)(bian)頻(pin)(pin)(pin)器(qi)專用(yong)(yong)(yong)協(xie)議(yi),以RS-485通(tong)(tong)(tong)(tong)信(xin)的(de)方(fang)式連接(jie)FXplc與(yu)變(bian)(bian)頻(pin)(pin)(pin)器(qi),對(dui)(dui)變(bian)(bian)頻(pin)(pin)(pin)器(qi)進行監控、各種指(zhi)(zhi)(zhi)(zhi)(zhi)令的(de)以及參數的(de)讀出/寫入功能,專用(yong)(yong)(yong)指(zhi)(zhi)(zhi)(zhi)(zhi)令IVCK、IVDR、IVRD、IVWR等,編程較為(wei)簡單(dan),也可(ke)(ke)以與(yu)普通(tong)(tong)(tong)(tong)變(bian)(bian)頻(pin)(pin)(pin)器(qi)一樣(yang)采(cai)用(yong)(yong)(yong)無(wu)協(xie)議(yi)通(tong)(tong)(tong)(tong)信(xin)的(de)RS指(zhi)(zhi)(zhi)(zhi)(zhi)令或(huo)者(zhe)modbus通(tong)(tong)(tong)(tong)信(xin)實(shi)現對(dui)(dui)變(bian)(bian)頻(pin)(pin)(pin)器(qi)的(de)控制,變(bian)(bian)頻(pin)(pin)(pin)器(qi)專用(yong)(yong)(yong)協(xie)議(yi)和無(wu)協(xie)議(yi)通(tong)(tong)(tong)(tong)信(xin)可(ke)(ke)采(cai)用(yong)(yong)(yong)bd或(huo)adp都能完成,modbus則需要adp。三(san)菱plc與(yu)其他(ta)牌(pai)子(zi)的(de)變(bian)(bian)頻(pin)(pin)(pin)器(qi)通(tong)(tong)(tong)(tong)信(xin)則不能采(cai)用(yong)(yong)(yong)專用(yong)(yong)(yong)指(zhi)(zhi)(zhi)(zhi)(zhi)令控制,記住專用(yong)(yong)(yong)的(de)協(xie)議(yi)或(huo)者(zhe)指(zhi)(zhi)(zhi)(zhi)(zhi)令都是三(san)菱設(she)備內部的(de),可(ke)(ke)采(cai)用(yong)(yong)(yong)無(wu)協(xie)議(yi)通(tong)(tong)(tong)(tong)信(xin)(RS指(zhi)(zhi)(zhi)(zhi)(zhi)令)或(huo)者(zhe)modbus通(tong)(tong)(tong)(tong)信(xin)實(shi)現,同樣(yang)bd板子(zi)只(zhi)支持無(wu)協(xie)議(yi)不支持modbus通(tong)(tong)(tong)(tong)信(xin)。
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