1756-PLS
PLC的通信模塊是用來完成與別的PLC，其他智能控制設(shè)備或計(jì)算機(jī)之間的通信。以下簡單介紹FX系列通信用功能擴(kuò)展板、適配器及通信模塊。
（1）通信擴(kuò)展板FX2N-232-BD FX2N-232-BD是以RS-232C傳輸標(biāo)準(zhǔn)連接PLC與其他設(shè)備的接口板。諸如個(gè)人計(jì)算機(jī)、條碼閱讀器或打印機(jī)等。可安裝在FX2N內(nèi)部。其最大傳輸距離為15米，最高波特率為19200bit/s，利用專用軟件可實(shí)現(xiàn)對(duì)PLC運(yùn)行狀態(tài)監(jiān)控，也可方便的由個(gè)人計(jì)算機(jī)向PLC傳送程序。
（2）通信接口模塊FX2N-232IF FX2N-232IF連接到FX2N系列PLC上，可實(shí)現(xiàn)與其它配有RS232C接口的設(shè)備進(jìn)行全雙工串行通信。例如個(gè)人計(jì)算機(jī)，打印機(jī)，條形碼讀出器等。在FX2N系列上最多可連接8塊FX2N-232IF模塊。用FROM/TO指令收發(fā)數(shù)據(jù)。最大傳輸距離為15米，最高波特率為19200bit/s，占用8個(gè)I/O點(diǎn)。數(shù)據(jù)長度、串行通信波特率等都可由特殊數(shù)據(jù)寄存器設(shè)置。
（3）通信擴(kuò)展板FX2N-485-BD FX2N-485-BD-用于RS-485通信方式。它可以應(yīng)用于無協(xié)議的數(shù)據(jù)傳送。FX2N-485-BD在原協(xié)議通信方式時(shí)，利用RS指令在個(gè)人計(jì)算機(jī)、條碼閱讀器、打印機(jī)之間進(jìn)行數(shù)據(jù)傳送。傳送的最大傳輸距離為50米，最高波特率也為19200bit/s。每一臺(tái)FX2N系列PLC可安裝一塊FX2N-485-BD通信板。除利用此通信板實(shí)現(xiàn)與計(jì)算機(jī)的通信外，還可以用它實(shí)現(xiàn)兩臺(tái)FX2N系列PLC之間的并聯(lián)。
（4）通信擴(kuò)展板FX2N-422-BD FX2N-422-BD應(yīng)用于RS-422通信?？蛇B接FX2N系列的PLC上，并作為編程或控制工具的一個(gè)端口?？捎么私涌谠赑LC上連接PLC的外部設(shè)備、數(shù)據(jù)存儲(chǔ)單元和人機(jī)界面。利用FX2N-422-BD可連接兩個(gè)數(shù)據(jù)存儲(chǔ)單元（DU）或一個(gè)DU系列單元和一個(gè)編程工具，但一次只能連接一個(gè)編程工具。每一個(gè)基本單元只能連接一個(gè)FX2N-422-BD，且不能與FX2N-485-BD或FX2N-232-BD一起使用。
（5）接口模塊MSLSECNET/MINI
采用MSLSECNET/MINI接口模塊，F(xiàn)X系列PLC可用作為A系列PLC的就地控制站，構(gòu)成DCS/' target='b'>集散控制系統(tǒng)。
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