浙江11选5开奖结果查询

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RS485的网络拓扑形式

2020-08-26

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  物联网(IoT)大大减少了人与人、或人与计算机交互的需求。现在,物联网可以帮助人们实现自动化流程工作。从偏远地区隔离的设备访问和收集信息,并通过网络传输该数据,这在各个行业中已司空见惯。但是,随着连接设备数量的增加,出现了共同的挑战。在工业环境中,例如制造业、能源生产和工业控制系统,需要从使用标准RS485数据通信端口的设备传输数据,例如智能电表。

浙江11选5开奖结果查询  ZHINENGDIANBIAOJILUDIANNENGDECHANSHENGHEXIAOHAO,BINGYUNXUDIANBIAOYUMEIQI、SHUIHEDIANLISHESHIDEYUANCHENGXITONGZHIJIANJINXINGSHUANGXIANGTONGXUN。QUANQIUYOU200DUOJIAZHIZAOSHANGSHENGCHANZHINENGDIANBIAO,ZHEIXIEDIANBIAODUOSHUSHITONGGUORS485SHUJUTONGXINDUANKOUCHUANSHUSHUJUDE。

物联网对智能表计的影响

浙江11选5开奖结果查询  YONGYOUTAIYANGNENGZHUANGZHIHEDIANCHICUNCHUSHESHIDEJIATINGHEHEZUOSHEBEIGUILEIWEIDIANCHICUNCHUYUNYINGSHANG。DANGTAMENSHIYONGANZHUANGCHANSHENGDEDIANLISHI,TAMENHAIKEYISHIYONGCUNCHUSHEBEI,TONGGUODUICUNCHUSHEBEICHONGDIANHEFANGDIANLAICANYUDIANLIPINGHENGSHICHANG。ZAIZHEIXIEQINGKUANGXIA,ANZHUANGZHINENGDIANBIAOSHIDAZAOZHIHUICHENGSHIDEBIJINGZHILU。FANGWENHECHUANSHULAIZIZHINENGDIANBIAODESHUJU,SHIYIZHONGTONGGUODTUSHIXIANDECHANGJIANQIELIUXINGDEFANGFA。DANGZHINENGDIANBIAOBUSHUZAIJUYOUGAOSUKEKAODEFENGWOFUGAIFANWEIDEQUYUSHI,ZHEIFEICHANGYOUYONGDE。DANSHI,DANGZHINENGBIAOJIXUYAOANZHUANGZAIDIXIASHIHUODIJIAOZHONG,JIUHUISHOUDAOXINHAOGANRAO。DIXIASHIDEYIDONGXINHAOTONGCHANGBUTAILIXIANG,ERYITAIWANGCHUANKOUFUWUQISHEBEISHIDAITIFENGWOWANGLUODTUSHEBEIDELIXIANGCHANPIN,FUWUQITONGGUOYITAIWANGKOUCONGRS232/422/485CHUANKOUDESHEBEICHUANSHUSHUJU,WANCHENGZHINENGBIAOJIDESHUJUCHUANSHUGONGZUO。

  以太网(IEEE 802.3)是当今使用最广泛的网络协议,它也是串口通信标准。RS232/422/485串口中使用最多的是RS485串口,问题来了,为什么RS485没有被以太网取代呢?

浙江11选5开奖结果查询  JIANGRS485YUYITAIWANGJINXINGBIJIAOSHI,TAMENDOUYOUYOUDIANHEQUEDIAN。RS485DEZHUYAOQUEDIANSHITONGXINSUDUYOUXIAN,ZUIGAOZHINENGDADAO10Mb。RS485SHEJIYONGYUZHU/CONGTUOPU。ZAICIXITONGZHONG,ZHUJIEDIANLUNXUNMEIGECONGJIEDIAN,DENGDAIXIANGYING,RANHOULUNXUNXIAYIGECONGJIEDIAN。ZHEIYANGKEYIBIMIANSHUJUBAOCHONGTU,CONGERSHIXIANQUEDINGXINGXINGWEI。DANSHI,YITAIWANGMEIYOUNEIZHIFANGFALAIBIMIANSHUJUBAOCHONGTU。DUIYUWOMENLAISHUO,ZAIGUOCHENGKONGZHIHUOJIQIRENKONGZHIZHILEIDEYINGYONGZHONG,QUEDINGXINGXINGWEISHIQIANGZHIXINGDE,ERTONGXINSUDUTONGCHANGZUGOUGAO。YIJIAODIDESUDUJINXINGTONGXUN,HAIJUYOUDUIGONGYEHUANJINGZHONGCUNZAIDEZAOSHENGYOUGENGQIANGDEDIKANGLIYOUSHI。

  RS485的网络拓扑形式

  WANGLUOTUOPUJUEDINGLESHEBEILIANJIEZAIYIQIDEFANGSHI。XIATUXIANSHILEYIXIECHANGJIANDETUOPU。ZAIZHEIXIEKENENGXINGZHONG,YONGYURS485DEZUIJIAWANGLUOTUOPUSHIJUHUALIAN(HUOXIANLU),YINWEIGAITUOPUDUIXINHAOWANZHENGXINGDEYINGXIANGZUIXIAO。KEYISHIYONGZONGXIANTUOPUJIEGOU(SHIYONGCUNGENDEGUGAN),DANSHISUIZHEMEIGECUNGENDEZHANGDUZENGJIA,YOUYUTONGXINXIANSHANGDEXINHAOSHIZHEN,KEYICHUANSHUDEZUIDASHUJUSULVJIANGJIANGDI。

RS485的网络拓扑形式

  RS485SHIYONGSHUANGJIAOXIANDIANLANYOUZHUYUJIANSHAODIANCIGANRAO。SHUANGJIAOXIANYUNXUXIANSHANGDEZAOSHENGZAILIANGTIAOXIANSHANGXIANGDENG。ZAOSHENGRENGRANCUNZAI,DANSHIYINWEIJIESHOUQIZHEYANYULIANGGEXINHAOZHIJIANDECHAYI,SUOYIGAICHAYIBUSHOUZAOSHENGDEYINGXIANG,YINCIJIESHOUQIKEYIZAIZUIHOUZHUNQUEDIZHONGJIANYUANSHIXINHAO。

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