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标题: [求助]有关LONGWORKS下的BA系统的重大疑问! [打印本页]

作者: giggs11858    时间: 2007-6-28 15:56
标题: [求助]有关LONGWORKS下的BA系统的重大疑问!
<p><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><font size="3"><font size="3"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';">&nbsp; <font size="1">本人刚进入弱电行业,对于BA系统方面还存在很多的疑问。前些天看到一段文字,请哪位高手代为解答</font></span></span></font></font></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">一下。</font></span></span></span></p><p><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">&nbsp; 那段文字是这么说的:<br/>&nbsp;&nbsp;&nbsp; 现代智能建筑自动化系统是计算机、通信和自动控制技术有机结合的整体。一个智能建筑自动化系统</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">往往包含成千上万个现场传感器、执行器,这些传感器、执行器通过智能控制节点实施现场监控。<br/>&nbsp;&nbsp;&nbsp; 智能控制节点的组网方式一般有两种:<br/> &nbsp; 一种是分层结构方式(两级或三级网络),即智能控制节点经由网络控制单元,或区域控制计算机组成</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">控制网络,然后与PC局域网(信息管理网或企业网络)相连。<br/>&nbsp;&nbsp;&nbsp; 另一种是单层结构方式(一级网),即智能控制节点直接组成对等层点到点(peer-to-peer)通信的分</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">布式控制网络。网络中的所有节点(包括实施监控的PC)在网络中都处于同等的地位。(到这里说的都没错</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">,下面我的疑问来了!)<br/>&nbsp;&nbsp; LonWorks是这种单层结构控制网络的典型代表。</font></span></span></span></p><p><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">•&nbsp; 单层结构(一级网络)支持整个系统的编址要求,通过网络级路由器,可在逻辑上分段。路由器对于节</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">点应用是透明的,而且不妨碍网络安装调试诊断程序对整个系统范围的直接访问。 <br/>&nbsp;<br/>•&nbsp; 分层结构(二级或三级网络)提供的地址空间较小,当接线改变时,其应用级路由器或网关需要对应用</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">程序作相应的修改,而且这些路由器或网关需要有自己的网络管理工作,因而不同厂商的产品之间不能互</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">操作。<br/>&nbsp;&nbsp;&nbsp; 所以,采用单层比分层好。<br/>&nbsp;&nbsp; 是这样的吗?问题是我接触的BA都是按照BACnet协议分层的,只是在最底层的现场层才用Lon-Bus连</font></span></span></span><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">接,那么上述文字的单层结构到底是什么意思? 是专指现场层而言吗?请高手具体的帮我指正!多谢了!</font></span></span></span></p><p><span lang="EN-US" style="FONT-SIZE: 44pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-color-index: 3; mso-fareast-language: ZH-CN;"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><span style="FONT-SIZE: 32pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><font size="1">!</font></span><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: &quot;100 50 0&quot;; mso-margin-left-alt: 216;"><font size="1"></font></div></span><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: &quot;100 50 0&quot;; mso-margin-left-alt: 216;"><font face="宋体" size="1"></font></div></span></p><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: &quot;100 50 0&quot;; mso-margin-left-alt: 216;"><font size="1"></font></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: &quot;100 50 0&quot;; mso-margin-left-alt: 216;"><font face="宋体" size="1"></font></div><p><font face="宋体" size="1"></font></p>
作者: xxl27520    时间: 2007-6-28 18:00
字太小了,看不见
作者: lanyun    时间: 2007-7-2 12:44
<p>peer to peer是对于LON来说的,即控制器之间可以相互通讯,计算机也相当于其中的一个节点(LON卡),你所接触的系统不是全lon的,所以有分层,像西门子系统,计算机与控制器是一层,控制器分BLN FLN,即所谓的楼宇级网络与楼层级网络,控制器与末端设备是一层。共有3层结构。</p><p>当然西门子的BLN级的控制器现在也能扩展LON的模块(等同于与FLN一个级别),它不可能做全LON,这样软件结构就全变了,哈,伤筋动骨的呀。H也是这样的。</p><p>现在我们用TAC的就很方便,配电仪表我们也推荐用户用LON的,组网很方便,其他厂家的lon产品也很容易接入。</p>




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