<p>正如下面的维基百科文章所述,RS485是一种没有默认软件或协议的电气规范。<br/>
处理设备地址的机制必须由您自己创建,或者通过选择具有此功能的协议并应用它来创建</p>
<p><a href="https://en.wikipedia.org/wiki/RS-485" rel="nofollow noreferrer">RS-485 - Wikipedia</a></p>
<blockquote>
<p>RS-485 only specifies electrical characteristics of the generator and the receiver: the physical layer. It does not specify or recommend any communications protocol; Other standards define the protocols for communication over an RS-485 link. The foreword to the standard references The Telecommunications Systems Bulletin TSB-89 which contains application guidelines, including data signaling rate vs. cable length, stub length, and configurations. </p>
</blockquote>
<p>例如,Modbus不是经常使用吗?<br/>
<a href="https://en.wikipedia.org/wiki/Modbus" rel="nofollow noreferrer">Modbus -Wikipedia</a></p>
<blockquote>
<p>Modbus is a data communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. Modbus is popular in industrial environments because it is openly published and royalty-free. </p>
</blockquote>
<p>还有一些python包。<br/>
<a href="https://pypi.org/project/minimalmodbus/" rel="nofollow noreferrer">minimalmodbus 1.0.2</a><br/>
<a href="https://pypi.org/project/pymodbus/" rel="nofollow noreferrer">pymodbus 2.3.0</a></p>
<p>如何设置设备地址将需要根据要采用的软件包的规格进行</p>
<hr/>
<p><strong>此外:</strong></p>
<p>顺便说一句,如果您正在为PLC设备使用制造商的专有协议,那么您很可能会为该设备和协议使用这种多点连接。
第一种方法似乎是联系制造商的支持部门</p>
<p>或者,即使此站点是制造商支持位置,您也需要添加信息,例如您尝试连接的设备以及配置</p>
<p><a href="http://www.fatek.com/en/download.php?act=list&cid=13" rel="nofollow noreferrer">HMI_Support</a>&<a href="http://www.fatek.com/en/download.php?act=list&cid=58" rel="nofollow noreferrer">PLC_Support</a><br/>
<a href="http://www.fatek.com/en/product.php?act=list&cid=2" rel="nofollow noreferrer">HMI_Products</a>&<a href="http://www.fatek.com/en/product.php?act=category&cid=1" rel="nofollow noreferrer">PLC_Products</a></p>