西门子S7200smartPLC与三菱FX3uPlc做485Modbus RTU通信，西门子S7200smartPLC做主站轮训
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西门子S7200smartPLC与三菱FX3uPlc做485Modbus RTU通信，西门子S7200smartPLC做主站轮训扫描读取写去数据转入三菱Plc 通信已测试没有问题， <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89767668/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89767668/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">西门子<span class="_ _0"> </span><span class="ff2">S7200smartPLC<span class="_ _1"> </span></span>与三菱<span class="_ _0"> </span><span class="ff2">FX3uPLC<span class="_ _1"> </span></span>作为两种常用的工业控制器<span class="ff3">，</span>可以通过<span class="_ _0"> </span><span class="ff2">485 Modbus </span></div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">RTU<span class="_ _1"> </span><span class="ff1">协议进行通信<span class="ff4">。</span>在这篇文章中<span class="ff3">，</span>我们将着重讨论如何实现这种通信<span class="ff3">，</span>并详细介绍西门子</span></div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">S7200smartPLC<span class="_ _1"> </span><span class="ff1">作为主站进行轮询扫描读写数据<span class="ff3">，</span>并将其传输给三菱<span class="_ _0"> </span></span>FX3uPLC<span class="_ _1"> </span><span class="ff1">的过程<span class="ff4">。</span></span></div><div class="t m0 x1 h2 y4 ff1 fs0 fc0 sc0 ls0 ws0">首先<span class="ff3">，</span>我们需要了解什么是<span class="_ _0"> </span><span class="ff2">485 Modbus RTU<span class="_ _1"> </span></span>通信协议<span class="ff4">。<span class="ff2">Modbus<span class="_ _1"> </span></span></span>是一种通信协议<span class="ff3">，</span>用于在工业自</div><div class="t m0 x1 h2 y5 ff1 fs0 fc0 sc0 ls0 ws0">动化系统中的设备之间进行通信<span class="ff4">。</span>它基于串行通信方式<span class="ff3">，</span>具有高可靠性和稳定性<span class="ff4">。</span>而<span class="_ _0"> </span><span class="ff2">485<span class="_ _1"> </span></span>是一种常用</div><div class="t m0 x1 h2 y6 ff1 fs0 fc0 sc0 ls0 ws0">的串行通信标准<span class="ff3">，</span>可以实现多个设备之间的点对点或多点通信<span class="ff4">。</span></div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0">在本次通信中<span class="ff3">，</span>我们选择了西门子<span class="_ _0"> </span><span class="ff2">S7200smartPLC<span class="_ _1"> </span></span>作为主站<span class="ff3">，</span>负责控制和监控系统的整体运行<span class="ff4">。</span>三</div><div class="t m0 x1 h2 y8 ff1 fs0 fc0 sc0 ls0 ws0">菱<span class="_ _0"> </span><span class="ff2">FX3uPLC<span class="_ _1"> </span></span>作为从站<span class="ff3">，</span>接收主站发送的指令<span class="ff3">，</span>并完成相应的操作<span class="ff4">。</span>通过<span class="_ _0"> </span><span class="ff2">485 Modbus RTU<span class="_ _1"> </span></span>协议<span class="ff3">，</span></div><div class="t m0 x1 h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">主站可以实时获取从站的状态和数据<span class="ff3">，</span>实现信息的传输与共享<span class="ff4">。</span></div><div class="t m0 x1 h2 ya ff1 fs0 fc0 sc0 ls0 ws0">首先<span class="ff3">，</span>我们需要在西门子<span class="_ _0"> </span><span class="ff2">S7200smartPLC<span class="_ _1"> </span></span>中设置通信参数<span class="ff4">。</span>通过编程软件<span class="ff3">，</span>我们可以设置串口的波</div><div class="t m0 x1 h2 yb ff1 fs0 fc0 sc0 ls0 ws0">特率<span class="ff4">、</span>数据位<span class="ff4">、</span>停止位等参数<span class="ff3">，</span>以确保主从站之间的通信正常进行<span class="ff4">。</span>同时<span class="ff3">，</span>还需要设置<span class="_ _0"> </span><span class="ff2">Modbus RTU</span></div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">通信协议的相关参数<span class="ff3">，</span>如起始地址<span class="ff4">、</span>寄存器长度等<span class="ff4">。</span></div><div class="t m0 x1 h2 yd ff1 fs0 fc0 sc0 ls0 ws0">接下来<span class="ff3">，</span>我们需要编写<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>程序<span class="ff3">，</span>使主站能够轮询扫描并读写从站的数据<span class="ff4">。</span>通过<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>编程软件<span class="ff3">，</span>我</div><div class="t m0 x1 h2 ye ff1 fs0 fc0 sc0 ls0 ws0">们可以编写相应的指令逻辑来实现这一功能<span class="ff4">。</span>首先<span class="ff3">，</span>主站会发送读取的指令给从站<span class="ff3">，</span>从站接收到指令</div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">后将相应的数据返回给主站<span class="ff4">。</span>主站再根据需要进行数据处理或存储<span class="ff3">，</span>并发送写入指令给从站<span class="ff3">，</span>从站接</div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">收到指令后将数据写入到相应的寄存器中<span class="ff4">。</span></div><div class="t m0 x1 h2 y11 ff1 fs0 fc0 sc0 ls0 ws0">在编写<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>程序时<span class="ff3">，</span>我们需要考虑错误处理和异常情况的处理<span class="ff4">。</span>例如<span class="ff3">，</span>如果从站返回的数据不正确或</div><div class="t m0 x1 h2 y12 ff1 fs0 fc0 sc0 ls0 ws0">通信发生故障<span class="ff3">，</span>主站应该能够及时发现并采取相应的措施<span class="ff3">，</span>以确保通信的可靠性和稳定性<span class="ff4">。</span>此外<span class="ff3">，</span>我</div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">们还可以在主从站之间设置双工通信<span class="ff3">，</span>使通信过程更加高效<span class="ff4">。</span></div><div class="t m0 x1 h2 y14 ff1 fs0 fc0 sc0 ls0 ws0">经过测试<span class="ff3">，</span>我们发现西门子<span class="_ _0"> </span><span class="ff2">S7200smartPLC<span class="_ _1"> </span></span>与三菱<span class="_ _0"> </span><span class="ff2">FX3uPLC<span class="_ _1"> </span></span>之间的<span class="_ _0"> </span><span class="ff2">485 Modbus RTU<span class="_ _1"> </span></span>通信没有</div><div class="t m0 x1 h2 y15 ff1 fs0 fc0 sc0 ls0 ws0">问题<span class="ff4">。</span>这种通信方式不仅可以在工业自动化领域得到广泛应用<span class="ff3">，</span>还具有较高的可扩展性和兼容性<span class="ff4">。</span>通</div><div class="t m0 x1 h2 y16 ff1 fs0 fc0 sc0 ls0 ws0">过这种通信方式<span class="ff3">，</span>不同品牌的<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>可以实现互联互通<span class="ff3">，</span>为工业自动化系统的设计和运行提供了更多的</div><div class="t m0 x1 h2 y17 ff1 fs0 fc0 sc0 ls0 ws0">灵活性和便利性<span class="ff4">。</span></div><div class="t m0 x1 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0">总结起来<span class="ff3">，</span>本文围绕西门子<span class="_ _0"> </span><span class="ff2">S7200smartPLC<span class="_ _1"> </span></span>与三菱<span class="_ _0"> </span><span class="ff2">FX3uPLC<span class="_ _1"> </span></span>之间的<span class="_ _0"> </span><span class="ff2">485 Modbus RTU<span class="_ _1"> </span></span>通信展开</div><div class="t m0 x1 h2 y19 ff1 fs0 fc0 sc0 ls0 ws0">了讨论<span class="ff4">。</span>我们详细介绍了通信协议的基本原理<span class="ff3">，</span>并重点介绍了主站轮询扫描读写数据的过程<span class="ff4">。</span>通过合</div><div class="t m0 x1 h2 y1a ff1 fs0 fc0 sc0 ls0 ws0">理设置通信参数和编写<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>程序<span class="ff3">，</span>我们可以实现不同品牌的<span class="_ _0"> </span><span class="ff2">PLC<span class="_ _1"> </span></span>之间的通信<span class="ff3">，</span>并为工业自动化系统</div><div class="t m0 x1 h2 y1b ff1 fs0 fc0 sc0 ls0 ws0">的设计和运行提供更多的可能性<span class="ff4">。</span>通过本文的介绍<span class="ff3">，</span>读者可以更好地理解和应用<span class="_ _0"> </span><span class="ff2">485 Modbus RTU</span></div><div class="t m0 x1 h2 y1c ff1 fs0 fc0 sc0 ls0 ws0">通信协议<span class="ff3">，</span>在实际工程项目中提供技术支持和指导<span class="ff4">。</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>