PLC是種專門在工業(yè)環(huán)境下的可編程邏輯控制器，可取代傳統(tǒng)的繼電器電路，達(dá)到對(duì)設(shè)備的邏輯控制與順序控制。邊緣網(wǎng)關(guān)可通過PLC協(xié)議對(duì)PLC進(jìn)行讀寫通信。例如縱橫智控的EG8200邊緣網(wǎng)關(guān)，可支持西門子、三菱、歐姆龍、倍福、匯川、松下等等主流PLC，將復(fù)雜的硬件接口、不同的工業(yè)網(wǎng)絡(luò)協(xié)議等抽象為一個(gè)個(gè)的節(jié)點(diǎn)，用戶可以靈活使用這些節(jié)點(diǎn)，以拖動(dòng)、連線的方式，來代替?zhèn)鹘y(tǒng)復(fù)雜低效的編碼過程。下面，小編帶大家看看，邊緣網(wǎng)關(guān)EG8200系列是如何和西門子PLC對(duì)接的。

  首先，需要鏈接網(wǎng)關(guān)，可通過網(wǎng)線、WIFI、遠(yuǎn)程鏈接等方式鏈接網(wǎng)關(guān)。

  然后，登錄編程界面，通過西門子節(jié)點(diǎn)進(jìn)行對(duì)接。具體操作如下：

  邊緣網(wǎng)關(guān)的Siemens節(jié)點(diǎn)用于和西門子品牌的PLC進(jìn)行讀寫通信。Siemens節(jié)點(diǎn)支持協(xié)議：S7、PPI。S7協(xié)議已經(jīng)適配西門子所有在售的PLC型號(hào)，PPI只支持部分老舊PLC，強(qiáng)烈建議使用S7通信。

/*******************************協(xié)議*******************************/
協(xié)議：強(qiáng)烈建議和西門子PLC通信使用S7協(xié)議
/*****************************網(wǎng)絡(luò)信息*****************************/
地址：PLC的IP
端口：S7通信默認(rèn)102
連接超時(shí)：和PLC建立連接的超時(shí)時(shí)間
通訊超時(shí)：和PLC通信超時(shí)時(shí)間
?；顣r(shí)間：TCP連接?；顣r(shí)間
/*****************************PLC信息*****************************/
型號(hào)：S1500/S1200/S400/S300/S200/S200Smart
ConType：連接方式,通常為1
Rack：機(jī)架號(hào)
Slot：槽號(hào)
LocalTSAP：本地TASP
DestTSAP：遠(yuǎn)端TSAP

參數(shù)配置請(qǐng)參考:
	S1500/S1200/S400/S300
			根據(jù)PLC實(shí)際的情況來填寫Rack和Slot
	S200Smart
			無需設(shè)置
	S200
			LoaclTSAP:4D57和DestTSAP:4D57
/*****************************地址信息*****************************/
參數(shù)列表:
地址類型	  描述	              備注
I0	      輸入寄存器	          ex:I1.6
Q0	      輸出寄存器	          ex:Q1.6
M0	      內(nèi)部寄存器	          ex:M1.6,MW100,MD100
DB1.0	    數(shù)據(jù)寄存器	          ex:DB1.0.1,DB1.DBD100
V0	      數(shù)據(jù)寄存器	          等同于DB1.0
T0	      定時(shí)器寄存器	        ex:T37
C0	      計(jì)數(shù)器寄存器	        ex:C1
AI0	      模擬量輸入映像寄存器	ex:僅支持字
AQ0	      模擬量輸出映像寄存器	ex:僅支持字
/*****************************工作模式*****************************/
工作模式:讀/寫
觸發(fā)條件:定時(shí)循環(huán)讀/外部觸發(fā)讀

msg.payload
#對(duì)象數(shù)組,每個(gè)對(duì)象表示一個(gè)要執(zhí)行的操作,數(shù)組表示可批量執(zhí)行
#以下為每個(gè)對(duì)象的屬性：
func
#要執(zhí)行的讀寫操作,請(qǐng)參考下表
body.address
#要操作的地址/起始地址
body.length
#要操作的地址長度（以字節(jié)為單位）
body.name
#節(jié)點(diǎn)執(zhí)行完畢以后,以此對(duì)象為key輸出,否則以address為key輸出
body.value
#要寫入的值

msg.payload
#一個(gè)對(duì)象,包含了讀寫指令的結(jié)果
#讀結(jié)果示例:msg.payload={VB10:0x10,VB11:0x11}
#寫結(jié)果示例:msg.payload={VB10:true,VB11:true}

讀S7-200 Smart數(shù)據(jù)

[{"id":"ece74f6f8a9a8548","type":"inject","z":"265cd2b9785ecf45","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":90,"y":200,"wires":[["52c1bedf10d86f5d"]]},{"id":"dc1df440e1b50c61","type":"debug","z":"265cd2b9785ecf45","name":"調(diào)試 1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":690,"y":200,"wires":[]},{"id":"52c1bedf10d86f5d","type":"function","z":"265cd2b9785ecf45","name":"函數(shù)計(jì)算 1","func":"\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":250,"y":200,"wires":[["68d173cfb11675f9"]]},{"id":"68d173cfb11675f9","type":"Siemens","z":"265cd2b9785ecf45","name":"","protocol":"iplink_SiemensS7","IPAddress":"192.168.0.34","DestPort":"102","IPLinkTimeout":"2000","IPCommTimeout":"2000","Spname":"COM10","Baudrate":"9600","Databits":"8","Stopbit":"1","Paritybit":"0","RTSEnable":false,"SpLinktimeout":"2000","SpIntertimeout":"-1","workMode":"read","readMode":"cyc","readCyc":"1000","vartable":[{"addr":"VB10","name":"VB10","type":"byte","len":1},{"addr":"VB11","name":"VB11","type":"byte","len":1},{"addr":"VW100","name":"VW100","type":"uint16","len":2},{"addr":"VW102","name":"VW102","type":"uint16","len":2},{"addr":"VW104","name":"VW104","type":"uint16","len":2}],"SiemensS7Model":"5","SiemensS7ConnectionType":"1","SiemensS7Rack":"0","SiemensS7Slot":"0","SiemensS7LocalTSAP":"0","SiemensS7DestTSAP":"0","SiemensPPIStation":"2","stringvar":[],"customName":"Siemens:S7-S200Smart","x":470,"y":200,"wires":[["dc1df440e1b50c61"]]}]

寫S7-200 Smart數(shù)據(jù)

[{"id":"c807d91fc01562b2","type":"inject","z":"265cd2b9785ecf45","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":110,"y":140,"wires":[["ee18017c9cb2e625"]]},{"id":"5f642f7cb333e422","type":"debug","z":"265cd2b9785ecf45","name":"調(diào)試 2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":710,"y":140,"wires":[]},{"id":"ee18017c9cb2e625","type":"function","z":"265cd2b9785ecf45","name":"寫VB10 VB11","func":"msg.payload = []\n\nmsg.payload[0] = {}\nmsg.payload[0].func = \"WriteByteArray\"\nmsg.payload[0].body = {}\nmsg.payload[0].body.name = \"VB10\"\nmsg.payload[0].body.address = \"VB10\"\nmsg.payload[0].body.value = \"10\"\n\nmsg.payload[1] = {}\nmsg.payload[1].func = \"WriteByteArray\"\nmsg.payload[1].body = {}\nmsg.payload[1].body.name = \"VB11\"\nmsg.payload[1].body.address = \"VB11\"\nmsg.payload[1].body.value = \"11\"\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":280,"y":140,"wires":[["4dbd7a125ac67c98"]]},{"id":"4dbd7a125ac67c98","type":"Siemens","z":"265cd2b9785ecf45","name":"","protocol":"iplink_SiemensS7","IPAddress":"192.168.0.34","DestPort":"102","IPLinkTimeout":"2000","IPCommTimeout":"2000","Spname":"COM10","Baudrate":"9600","Databits":"8","Stopbit":"1","Paritybit":"0","RTSEnable":false,"SpLinktimeout":"2000","SpIntertimeout":"-1","workMode":"read","readMode":"trigger","readCyc":"1000","vartable":[{"addr":"VB10","name":"VB10","type":"byte","len":1},{"addr":"VB11","name":"VB11","type":"byte","len":1},{"addr":"VW100","name":"VW100","type":"uint16","len":2},{"addr":"VW102","name":"VW102","type":"uint16","len":2},{"addr":"VW104","name":"VW104","type":"uint16","len":2}],"SiemensS7Model":"5","SiemensS7ConnectionType":"1","SiemensS7Rack":"0","SiemensS7Slot":"0","SiemensS7LocalTSAP":"0","SiemensS7DestTSAP":"0","SiemensPPIStation":"2","stringvar":[],"customName":"Siemens:S7-S200Smart","x":510,"y":140,"wires":[["5f642f7cb333e422"]]},{"id":"a4dcae532f31b571","type":"inject","z":"265cd2b9785ecf45","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":110,"y":200,"wires":[["b969c69b9408fcff"]]},{"id":"238e2f37c070699e","type":"debug","z":"265cd2b9785ecf45","name":"調(diào)試 3","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":710,"y":200,"wires":[]},{"id":"b969c69b9408fcff","type":"function","z":"265cd2b9785ecf45","name":"讀VB10 VB11","func":"msg.payload = []\nmsg.payload[0] = {}\nmsg.payload[0].func = \"ReadByteArray\"\nmsg.payload[0].body = {}\nmsg.payload[0].body.name = \"VB10\"\nmsg.payload[0].body.address = \"VB10\"\nmsg.payload[0].body.length = 1\n\nmsg.payload[1] = {}\nmsg.payload[1].func = \"ReadByteArray\"\nmsg.payload[1].body = {}\nmsg.payload[1].body.name = \"VB11\"\nmsg.payload[1].body.address = \"VB11\"\nmsg.payload[1].body.length = 1\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":280,"y":200,"wires":[["b54ae54d08cbc456"]]},{"id":"b54ae54d08cbc456","type":"Siemens","z":"265cd2b9785ecf45","name":"","protocol":"iplink_SiemensS7","IPAddress":"192.168.0.34","DestPort":"102","IPLinkTimeout":"2000","IPCommTimeout":"2000","Spname":"COM10","Baudrate":"9600","Databits":"8","Stopbit":"1","Paritybit":"0","RTSEnable":false,"SpLinktimeout":"2000","SpIntertimeout":"-1","workMode":"write","readMode":"cyc","readCyc":"1000","vartable":[{"addr":"VB10","name":"VB10","type":"byte","len":1},{"addr":"VB11","name":"VB11","type":"byte","len":1},{"addr":"VW100","name":"VW100","type":"uint16","len":2},{"addr":"VW102","name":"VW102","type":"uint16","len":2},{"addr":"VW104","name":"VW104","type":"uint16","len":2}],"SiemensS7Model":"5","SiemensS7ConnectionType":"1","SiemensS7Rack":"0","SiemensS7Slot":"0","SiemensS7LocalTSAP":"0","SiemensS7DestTSAP":"0","SiemensPPIStation":"2","stringvar":[],"customName":"Siemens:S7-S200Smart","x":510,"y":200,"wires":[["238e2f37c070699e"]]}]

※ 注意：

●機(jī)架號(hào)/槽號(hào)博圖軟件查看方式