电能表485通讯地址(电能表通讯地址怎么看)

三相电能表485通过串口通信，其通信协议根据厂商有所不同； 在要求通信距 离为几十米到上千米时，广泛采用RS-485串行总线标准。RS-485采用平衡发送和差分接收，因此具有抑制共模干扰的能力。
常规的都是执行DL/T645-1997,有的厂家的表计还有自己的内部规约，如华立、威胜等。
485网络产品专业制造商

表正面对着你（铭牌一面），最右边的5个弱点端子依次是第一路485A、第一路485B、地线、第二路485A、第二路485B 地线也有可能没有，那就最右边的4个依次排着两路485，一般最右边两个是485线，为了避开左下角的强电可能对它的干扰，但不排除最左边是485的可能！实在不行你打开表盖，在PCB板上s代表秒脉冲；p电能脉冲输出，用来校验误差；485代表485线！ 这样最保险了，不知道地址AA是通配符，比如68 AA AA AA AA AA AA 68 01 02 43c3，97规约读电量；68 AA AA AA AA AA AA 68 11 04 33 33 33 33,07规约读电量！只对单个表啊，只有知道地址才可以连续抄表！多试一下波特律，1200,2400 4800 9600 都有可能！
RS485是一个通讯方式，相关的还有载波通讯等。。。 电表上的485口是接485线的，供电部分可以通过485进行抄表！！！
各个厂家的电表的485接口的位置不同。 一般在脉冲输出端子一排，而且多数是在后面两组。很少厂家的电表，也有跟电压电流端子并列的。 这个在电能表上肯定有标识。仔细看一下就能找到。
rs-485 的2线电压不断变化的，从而能传输数据楼主说的工作电压是指什么？rs-485通常是有rs-485收发器芯片来进行数据传输这些不同的芯片的工作电压会有差别的但具体到某个芯片来说是固定的如max485采用单一电源+5v工作，额定电流为300 μa，采用半双工通讯方式。它完成将ttl电平转换为rs－485电平的功能。max485芯片的结构和引脚都非常简单,内部含有一个驱动器和接收器。
在电表的接线盒内。

智能电表上有的有两路485接线端子，一般接第一组，电表的接线盒盖子上面有接线图，看485是接多少，如果是24和25，那么就接到这两个端子上，端子上有编号要仔细看，用小梅花改刀。传输每一户的用电量信息，用电量信息通过集中器传输到电力公司，RS485能在远距离条件下以及电子噪声大的环境下有效传输信号。RS-485使得连接本地网络以及多支路通信链路的配置成为可能。理论上，通信速率在100Kbps及以下时，RS485的最长传输距离可达1200米，但在实际应用中传输的距离也因芯片及电缆的传输特性而有所差异。在传输过程中可以采用增加中继的方法对信号进行放大，最多可以加八个中继，也就是说理论上RS485的最大传输距离可以达到10.8公里。扩展资料：布网网络拓扑一般采用终端匹配的总线型结构。在构建网络时，应注意如下几点：（1）采用一条双绞线电缆作总线，将各个节点串接起来，从总线到每个节点的引出线长度应尽量短，以便使引出线中的反射信号对总线信号的影响最低。有些网络连接尽管不正确，在短距离、低速率仍可能正常工作，但随着通信距离的延长或通信速率的提高，其不良影响会越来越严重，主要原因是信号在各支路末端反射后与原信号叠加，会造成信号质量下降。（2）应注意总线特性阻抗的连续性，在阻抗不连续点就会发生信号的反射。下列几种情况易产生这种不连续性：总线的不同区段采用了不同电缆，或某一段总线上有过多收发器紧靠在一起安装，再者是过长的分支线引出到总线。总之，应该提供一条单一、连续的信号通道作为总线。（3）注意终端负载电阻问题，在设备少距离短的情况下不加终端负载电阻整个网络能很好的工作，但随着距离的增加性能将降低。理论上，在每个接收数据信号的中点进行采样时，只要反射信号在开始采样时衰减到足够低就可以不考虑匹配。但这在实际上难以掌握，美国MAXIM公司有篇文章提到一条经验性的原则可以用来判断在什么样的数据速率和电缆长度时需要进行匹配：当信号的转换时间（上升或下降时间）超过电信号沿总线单向传输所需时间的3倍以上时就可以不加匹配。参考资料：百度百科-RS485通讯接口
智能电表上有的有两路485接线端子，一般接第一组，电表的接线盒盖子上面有接线图，你看485是接多少，如果是24和25，那么你就接到这两个端子上，端子上有编号要仔细看，用小梅花改刀。

在智能电表中，集中器到智能电表端使用RS485总线作为通讯，主要传输每一户的用电量信息，用电量信息通过集中器传输到电力公司，集中器传输到电力公司有两种做法，一种是使用交流载波技术，也叫电力线载波，顾名思义就是在电力线上叠加高频的通讯信号，在接 受端再解调出来。这是用于人比较多的区域如小区等场所，还有一种做法是使用无线技术如GPRS，一般这种做法用于比较偏远的地区如山区/变电站等。在智能电表的应用中，RS485总线的使用是有局限的，因为本身在楼宇里面使用，设备又有强电系统接入，RS485的抗干扰能力较薄弱，其主机带负载能力较弱，一般在32个节点以内比较稳定。且从机需要加隔离，成本较高。每一个RS485的智能电表需要集中器输出4根线与之通讯供电，施工也很复杂且不稳定。近几年有出现使用POWERBUS总线技术代替RS485总线接口做的智能电表，其主要特点是集中器到电表只需要两根线，完成通讯兼供电的功能，而且带负载能力极强，主机能支持512个节点且从机无极性，已有芯片方案。
按照《DL/T 645-2007多功能电能表通信协议》，通过RS485通信线可以读出电能表的各种数据，如各种电量，电表的各种参数，并且可以配置电表参数，如修改密码，设置费率等。可以用串口调试助手进行测试。
RS485通讯口 是 串行通信接口之一 线路简单、传输距离远还可以 组成 网络推荐看看百度百科请看 武汉鸿伟光电 有 485 连接示意图
RS485接口是一种数据通讯接口，是RS232通讯接口的“升级版”，比RS232的电器性能提高很多。具体见 http://baike.baidu.com/view/196467.htm。 “电能表”，是不是指的是“电度表”？现代的电度表多是采用数字式计量并显示，电度表使用RS232通讯口与电网管理部门连接，随时掌握用户的用电情况。

deep sky, light rain Lin Zhao. Cold, a person. Particularly the past two days the wind, showered and then confused depressed, really depressed. Tired today, filling the legs like lead, sink to death, little effort has not. And half a day in bed. Thought of him, feeling very afraid, really do not want to think anymore. In fact, sometimes, the feeling is very wonderful thing. I was too headstrong, and live too tired. blame should not say those words, Gan Mafei say it? Even really know, I would rather guess guess go, once the pierce the layers of paper, once the words out of the mouth, everything changed, like ... ...sad hearts that faint and can not heal wound, this time do not even know that their heart will never heal my wounds, maybe his injury is too deep, dark night outside the window, no stars, nor the moon, the air inside the trace of a spring cold, not the least bit warm, and only around the vent noise is enough to cover my heart loneliness and helplessness, and the mood is too complicated.I'm not happy, it is difficult to make others happy, making it difficult for people really like me, get close to me. This is what I have been afraid of being understood, fear of being close to the root cause of it. I fear that others in my cynical, carefree facade found a weak, poor, lonely soul, then, and then leave me.very tempting, I have been in his shadow. Advantages and Disadvantages may be too, what this episode is not in my heart always emerge. Understand just know want to see him, he is not always laugh, but I still think he looks like. Now many things are forgotten, but many forget some things but to remember more clearly, and read more to understand, seems to be the case.like to look back, and was only a go forward, there is no plan, no summary. Now some consciousness, or pick up emotions and continue to go forward. Again my heart is full of melancholy, know all the irreversible end to end and we have to know that life is not all romantic, and understand before the end of the former, and understand the end of the end is the end ... ... if sincerely deceived by hypocrisy, love changes become a source of pain.have a very good feeling. Each morning, especially in the sunny morning, stuck his head out from under the covers, see the bright light almost equal over, and my heart twitch for a while. I asked myself: What living? Every day I tell myself to happiness, why should I be strong can it? I am not happy, but also nothing worth happy.listening to sad songs, or see the scene scene, a scene, the heart often look to be sharp to tingling, pain,ladies long jackets, wanted to call time, do not want to talk,ladies plus size clothes, it's not no one to talk, it is This melancholy gratuitous. I do not know why, even though I know the feeling may be due from his sad, lost the focus of life, loss of reason to busy, very sad. This is hurt badly the point, it seems fine, but I put great passion all gone, this time with memory and tears into the soul collection.all this is why it? Seems not the case, because I doubt if I would give up hope. Think too much, and too concerned with feeling, it do not even know his own. I always think is not really such thing as fate, is not a lot of things in life are destined to a good strategy?thought, there are always people willing to listen to me tell, that is no longer in this world I'm the second person said. I thought, as I am a fool in this world ... ... one far horizon near, to be a long road to Solo travelers it. Cold, a person.distress, and asked bleak courtyard, repeated spring evening?silence in the passage of time, space operation. Can be thought or occupy my brain, emotions occupy my mind. In this silence, thinking of the emergence of heart fibrillation. In this quiet rain in a row without a break. The original time can become ugly and beautiful, the tender into the rough. Maintain a familiar, a distant and vague acquaintance, and in this world of right and wrong, is not to be more real, more beautiful and some of it? When spring came, I bless you in the distance. Again later this spring, this spring I do not know to go through several times. But, this time, I was cold, a person ... ...