{"id":1064473,"date":"2024-12-31T16:09:19","date_gmt":"2024-12-31T08:09:19","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1064473.html"},"modified":"2024-12-31T16:09:21","modified_gmt":"2024-12-31T08:09:21","slug":"%e5%9c%a8python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0opc%e6%95%b0%e6%8d%ae%e8%ae%bf%e9%97%ae","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1064473.html","title":{"rendered":"\u5728Python\u4e2d\u5982\u4f55\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/99265998-b886-432e-8690-4e6a8ca74b9c.webp?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\u5728Python\u4e2d\u5982\u4f55\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528OpenOPC\u5e93\u3001\u4f7f\u7528opcua\u5e93\u3001\u4f7f\u7528PyOPC\u5e93\u3002<\/strong> \u5176\u4e2d\uff0c<strong>\u4f7f\u7528OpenOPC\u5e93<\/strong>\u662f\u4e00\u4e2a\u76f8\u5bf9\u7b80\u5355\u4e14\u76f4\u63a5\u7684\u65b9\u6cd5\uff0cOpenOPC\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2aPython\u63a5\u53e3\u4e0eOPC\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u63cf\u8ff0\u5982\u4f55\u4f7f\u7528OpenOPC\u5e93\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee\u3002<\/p>\n<\/p>\n<h2><strong>\u4e00\u3001\u4f7f\u7528OpenOPC\u5e93<\/strong><\/h2>\n<p><p>OpenOPC\u5e93\u662fPython\u7684\u4e00\u4e2a\u6a21\u5757\uff0c\u4e13\u95e8\u7528\u4e8e\u4e0eOPC\uff08OLE for Process Control\uff09\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7b80\u5355\u6613\u7528\u7684\u51fd\u6570\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5feb\u901f\u5b9e\u73b0OPC\u6570\u636e\u7684\u8bfb\u53d6\u3001\u5199\u5165\u7b49\u529f\u80fd\u3002<\/p>\n<\/p>\n<p><h2>\u5b89\u88c5OpenOPC\u5e93<\/h2>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u5b89\u88c5OpenOPC\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install OpenOPC-Python3x<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u8fde\u63a5OPC\u670d\u52a1\u5668<\/h2>\n<\/p>\n<p><p>\u5728\u4f7f\u7528OpenOPC\u5e93\u4e4b\u524d\uff0c\u9700\u8981\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import OpenOPC<\/p>\n<h2><strong>\u521b\u5efa\u4e00\u4e2aOpenOPC\u5ba2\u6237\u7aef\u5bf9\u8c61<\/strong><\/h2>\n<p>opc = OpenOPC.client()<\/p>\n<h2><strong>\u8fde\u63a5\u5230\u672c\u5730OPC\u670d\u52a1\u5668<\/strong><\/h2>\n<p>opc.connect(&#39;Matrikon.OPC.Simulation.1&#39;)<\/p>\n<h2><strong>\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u4fe1\u606f<\/strong><\/h2>\n<p>print(opc.info())<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u9996\u5148\u5bfc\u5165\u4e86OpenOPC\u5e93\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2aOPC\u5ba2\u6237\u7aef\u5bf9\u8c61\u3002\u63a5\u7740\uff0c\u4f7f\u7528<code>connect<\/code>\u65b9\u6cd5\u8fde\u63a5\u5230\u672c\u5730\u7684Matrikon OPC\u4eff\u771f\u670d\u52a1\u5668\u3002\u6700\u540e\uff0c\u4f7f\u7528<code>info<\/code>\u65b9\u6cd5\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><h2>\u8bfb\u53d6OPC\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>read<\/code>\u65b9\u6cd5\u8bfb\u53d6OPC\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u8bfb\u53d6OPC\u6570\u636e\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u8bfb\u53d6\u4e00\u4e2aOPC\u6807\u7b7e\u7684\u503c<\/p>\n<p>value = opc.read(&#39;Random.Real8&#39;)<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>read<\/code>\u65b9\u6cd5\u8bfb\u53d6\u4e86\u4e00\u4e2a\u540d\u4e3a<code>Random.Real8<\/code>\u7684OPC\u6807\u7b7e\u7684\u503c\uff0c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u5199\u5165OPC\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u9664\u4e86\u8bfb\u53d6OPC\u6570\u636e\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>write<\/code>\u65b9\u6cd5\u5411OPC\u670d\u52a1\u5668\u5199\u5165\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5199\u5165OPC\u6570\u636e\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5411\u4e00\u4e2aOPC\u6807\u7b7e\u5199\u5165\u503c<\/p>\n<p>opc.write(&#39;Random.Real8&#39;, 123.45)<\/p>\n<h2><strong>\u8bfb\u53d6\u5199\u5165\u540e\u7684\u503c<\/strong><\/h2>\n<p>value = opc.read(&#39;Random.Real8&#39;)<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>write<\/code>\u65b9\u6cd5\u5411\u540d\u4e3a<code>Random.Real8<\/code>\u7684OPC\u6807\u7b7e\u5199\u5165\u4e86\u4e00\u4e2a\u503c<code>123.45<\/code>\uff0c\u7136\u540e\u518d\u6b21\u8bfb\u53d6\u8be5\u6807\u7b7e\u7684\u503c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u65ad\u5f00\u8fde\u63a5<\/h2>\n<\/p>\n<p><p>\u5b8c\u6210OPC\u6570\u636e\u8bbf\u95ee\u540e\uff0c\u9700\u8981\u65ad\u5f00\u4e0eOPC\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>close<\/code>\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u65ad\u5f00\u4e0eOPC\u670d\u52a1\u5668\u7684\u8fde\u63a5<\/p>\n<p>opc.close()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<h2><strong>\u4e8c\u3001\u4f7f\u7528opcua\u5e93<\/strong><\/h2>\n<p><p>opcua\u5e93\u662f\u53e6\u4e00\u4e2a\u7528\u4e8e\u4e0eOPC UA\uff08Unified Architecture\uff09\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u7684Python\u5e93\u3002OPC UA\u662fOPC\u7684\u4e00\u4e2a\u6269\u5c55\uff0c\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u529f\u80fd\u548c\u66f4\u9ad8\u7684\u5b89\u5168\u6027\u3002<\/p>\n<\/p>\n<p><h2>\u5b89\u88c5opcua\u5e93<\/h2>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u5b89\u88c5opcua\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install opcua<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u8fde\u63a5OPC UA\u670d\u52a1\u5668<\/h2>\n<\/p>\n<p><p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u8fde\u63a5\u5230OPC UA\u670d\u52a1\u5668\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from opcua import Client<\/p>\n<h2><strong>\u521b\u5efa\u4e00\u4e2aOPC UA\u5ba2\u6237\u7aef\u5bf9\u8c61<\/strong><\/h2>\n<p>client = Client(&quot;opc.tcp:\/\/localhost:4840&quot;)<\/p>\n<h2><strong>\u8fde\u63a5\u5230OPC UA\u670d\u52a1\u5668<\/strong><\/h2>\n<p>client.connect()<\/p>\n<h2><strong>\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u4fe1\u606f<\/strong><\/h2>\n<p>print(client.get_server_endpoints())<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u9996\u5148\u5bfc\u5165\u4e86opcua\u5e93\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2aOPC UA\u5ba2\u6237\u7aef\u5bf9\u8c61\u3002\u63a5\u7740\uff0c\u4f7f\u7528<code>connect<\/code>\u65b9\u6cd5\u8fde\u63a5\u5230\u672c\u5730\u7684OPC UA\u670d\u52a1\u5668\u3002\u6700\u540e\uff0c\u4f7f\u7528<code>get_server_endpoints<\/code>\u65b9\u6cd5\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u7aef\u70b9\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><h2>\u8bfb\u53d6OPC UA\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u8fde\u63a5\u5230OPC UA\u670d\u52a1\u5668\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>get_node<\/code>\u65b9\u6cd5\u83b7\u53d6\u4e00\u4e2a\u8282\u70b9\uff0c\u5e76\u4f7f\u7528<code>get_value<\/code>\u65b9\u6cd5\u8bfb\u53d6\u8282\u70b9\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u83b7\u53d6\u4e00\u4e2a\u8282\u70b9\u5bf9\u8c61<\/p>\n<p>node = client.get_node(&quot;ns=2;i=2&quot;)<\/p>\n<h2><strong>\u8bfb\u53d6\u8282\u70b9\u7684\u503c<\/strong><\/h2>\n<p>value = node.get_value()<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>get_node<\/code>\u65b9\u6cd5\u83b7\u53d6\u4e86\u4e00\u4e2a\u8282\u70b9\u5bf9\u8c61\uff0c\u8282\u70b9\u7684\u6807\u8bc6\u7b26\u4e3a<code>ns=2;i=2<\/code>\u3002\u63a5\u7740\uff0c\u4f7f\u7528<code>get_value<\/code>\u65b9\u6cd5\u8bfb\u53d6\u8be5\u8282\u70b9\u7684\u503c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u5199\u5165OPC UA\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u9664\u4e86\u8bfb\u53d6OPC UA\u6570\u636e\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>set_value<\/code>\u65b9\u6cd5\u5411\u8282\u70b9\u5199\u5165\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5411\u8282\u70b9\u5199\u5165\u503c<\/p>\n<p>node.set_value(123.45)<\/p>\n<h2><strong>\u8bfb\u53d6\u5199\u5165\u540e\u7684\u503c<\/strong><\/h2>\n<p>value = node.get_value()<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>set_value<\/code>\u65b9\u6cd5\u5411\u8282\u70b9\u5199\u5165\u4e86\u4e00\u4e2a\u503c<code>123.45<\/code>\uff0c\u7136\u540e\u518d\u6b21\u8bfb\u53d6\u8be5\u8282\u70b9\u7684\u503c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u65ad\u5f00\u8fde\u63a5<\/h2>\n<\/p>\n<p><p>\u5b8c\u6210OPC UA\u6570\u636e\u8bbf\u95ee\u540e\uff0c\u9700\u8981\u65ad\u5f00\u4e0eOPC UA\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>disconnect<\/code>\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u65ad\u5f00\u4e0eOPC UA\u670d\u52a1\u5668\u7684\u8fde\u63a5<\/p>\n<p>client.disconnect()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<h2><strong>\u4e09\u3001\u4f7f\u7528PyOPC\u5e93<\/strong><\/h2>\n<p><p>PyOPC\u5e93\u662f\u53e6\u4e00\u4e2a\u7528\u4e8e\u4e0eOPC\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u7684Python\u5e93\u3002\u5b83\u652f\u6301OPC DA\u548cOPC HDA\u4e24\u79cd\u534f\u8bae\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u590d\u6742\u7684OPC\u6570\u636e\u8bbf\u95ee\u529f\u80fd\u3002<\/p>\n<\/p>\n<p><h2>\u5b89\u88c5PyOPC\u5e93<\/h2>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u5b89\u88c5PyOPC\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528pip\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install PyOPC<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u8fde\u63a5OPC\u670d\u52a1\u5668<\/h2>\n<\/p>\n<p><p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from PyOPC import OPCClient<\/p>\n<h2><strong>\u521b\u5efa\u4e00\u4e2aOPC\u5ba2\u6237\u7aef\u5bf9\u8c61<\/strong><\/h2>\n<p>client = OPCClient(&quot;opc.da:\/\/localhost\/Matrikon.OPC.Simulation.1&quot;)<\/p>\n<h2><strong>\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668<\/strong><\/h2>\n<p>client.connect()<\/p>\n<h2><strong>\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u4fe1\u606f<\/strong><\/h2>\n<p>print(client.server_info())<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u9996\u5148\u5bfc\u5165\u4e86PyOPC\u5e93\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2aOPC\u5ba2\u6237\u7aef\u5bf9\u8c61\u3002\u63a5\u7740\uff0c\u4f7f\u7528<code>connect<\/code>\u65b9\u6cd5\u8fde\u63a5\u5230\u672c\u5730\u7684Matrikon OPC\u4eff\u771f\u670d\u52a1\u5668\u3002\u6700\u540e\uff0c\u4f7f\u7528<code>server_info<\/code>\u65b9\u6cd5\u663e\u793a\u8fde\u63a5\u7684\u670d\u52a1\u5668\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><h2>\u8bfb\u53d6OPC\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>read<\/code>\u65b9\u6cd5\u8bfb\u53d6OPC\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u8bfb\u53d6\u4e00\u4e2aOPC\u6807\u7b7e\u7684\u503c<\/p>\n<p>value = client.read(&quot;Random.Real8&quot;)<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>read<\/code>\u65b9\u6cd5\u8bfb\u53d6\u4e86\u4e00\u4e2a\u540d\u4e3a<code>Random.Real8<\/code>\u7684OPC\u6807\u7b7e\u7684\u503c\uff0c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u5199\u5165OPC\u6570\u636e<\/h2>\n<\/p>\n<p><p>\u9664\u4e86\u8bfb\u53d6OPC\u6570\u636e\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>write<\/code>\u65b9\u6cd5\u5411OPC\u670d\u52a1\u5668\u5199\u5165\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5411\u4e00\u4e2aOPC\u6807\u7b7e\u5199\u5165\u503c<\/p>\n<p>client.write(&quot;Random.Real8&quot;, 123.45)<\/p>\n<h2><strong>\u8bfb\u53d6\u5199\u5165\u540e\u7684\u503c<\/strong><\/h2>\n<p>value = client.read(&quot;Random.Real8&quot;)<\/p>\n<h2><strong>\u6253\u5370\u8bfb\u53d6\u5230\u7684\u503c<\/strong><\/h2>\n<p>print(value)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528<code>write<\/code>\u65b9\u6cd5\u5411\u540d\u4e3a<code>Random.Real8<\/code>\u7684OPC\u6807\u7b7e\u5199\u5165\u4e86\u4e00\u4e2a\u503c<code>123.45<\/code>\uff0c\u7136\u540e\u518d\u6b21\u8bfb\u53d6\u8be5\u6807\u7b7e\u7684\u503c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><h2>\u65ad\u5f00\u8fde\u63a5<\/h2>\n<\/p>\n<p><p>\u5b8c\u6210OPC\u6570\u636e\u8bbf\u95ee\u540e\uff0c\u9700\u8981\u65ad\u5f00\u4e0eOPC\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>disconnect<\/code>\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u65ad\u5f00\u4e0eOPC\u670d\u52a1\u5668\u7684\u8fde\u63a5<\/p>\n<p>client.disconnect()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<h2><strong>\u56db\u3001\u603b\u7ed3<\/strong><\/h2>\n<p><p>\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u6211\u4eec\u4e86\u89e3\u4e86\u5982\u4f55\u5728Python\u4e2d\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee\uff0c\u5206\u522b\u4f7f\u7528\u4e86OpenOPC\u5e93\u3001opcua\u5e93\u548cPyOPC\u5e93\u3002\u8fd9\u4e09\u79cd\u65b9\u6cd5\u5404\u6709\u4f18\u52a3\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u5e93\u8fdb\u884c\u5f00\u53d1\u3002\u65e0\u8bba\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u9700\u8981\u6309\u7167\u6b65\u9aa4\u8fdb\u884c\u8fde\u63a5\u670d\u52a1\u5668\u3001\u8bfb\u53d6\u6570\u636e\u3001\u5199\u5165\u6570\u636e\u548c\u65ad\u5f00\u8fde\u63a5\u7b49\u64cd\u4f5c\uff0c\u4ee5\u786e\u4fddOPC\u6570\u636e\u8bbf\u95ee\u7684\u987a\u5229\u8fdb\u884c\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u8fde\u63a5OPC\u670d\u52a1\u5668\uff1f<\/strong><br \/>\u8981\u5728Python\u4e2d\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528<code>OpenOPC<\/code>\u5e93\u3002\u9996\u5148\uff0c\u786e\u4fdd\u5b89\u88c5\u8be5\u5e93\u548c\u76f8\u5173\u7684OPC\u670d\u52a1\u7ec4\u4ef6\u3002\u7136\u540e\uff0c\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u6765\u8fde\u63a5\uff1a<\/p>\n<pre><code class=\"language-python\">import OpenOPC\n\nopc = OpenOPC.open_client(&#39;Your_OPC_Server_Name&#39;)\nopc.connect()\n<\/code><\/pre>\n<p>\u786e\u4fdd\u66ff\u6362<code>Your_OPC_Server_Name<\/code>\u4e3a\u60a8\u5b9e\u9645\u7684OPC\u670d\u52a1\u5668\u540d\u79f0\u3002\u8fde\u63a5\u6210\u529f\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528<code>opc.list()<\/code>\u67e5\u770b\u53ef\u7528\u7684\u9879\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\u5982\u4f55\u8bfb\u53d6OPC\u6570\u636e\uff1f<\/strong><br \/>\u4e00\u65e6\u6210\u529f\u8fde\u63a5\u5230OPC\u670d\u52a1\u5668\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528<code>read()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-python\">value = opc.read(&#39;Your_OPC_Item_Name&#39;)\nprint(value)\n<\/code><\/pre>\n<p>\u5c06<code>Your_OPC_Item_Name<\/code>\u66ff\u6362\u4e3a\u60a8\u60f3\u8981\u8bfb\u53d6\u7684\u5b9e\u9645\u9879\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u8fd4\u56de\u8be5\u9879\u7684\u5f53\u524d\u503c\u53ca\u5176\u8d28\u91cf\u4fe1\u606f\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u5904\u7406OPC\u6570\u636e\u53d8\u5316\uff1f<\/strong><br \/>\u8981\u5904\u7406OPC\u6570\u636e\u7684\u53d8\u5316\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u8ba2\u9605\u529f\u80fd\u3002\u4f7f\u7528<code>subscribe()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u76d1\u542c\u7279\u5b9a\u9879\u7684\u53d8\u5316\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-python\">def on_change(value):\n    print(&#39;Value changed:&#39;, value)\n\nopc.subscribe(&#39;Your_OPC_Item_Name&#39;, callback=on_change)\n<\/code><\/pre>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6bcf\u5f53\u6307\u5b9a\u7684OPC\u9879\u53d1\u751f\u53d8\u5316\u65f6\uff0c<code>on_change<\/code>\u51fd\u6570\u5c06\u88ab\u8c03\u7528\uff0c\u60a8\u53ef\u4ee5\u5728\u8be5\u51fd\u6570\u4e2d\u5904\u7406\u65b0\u7684\u6570\u636e\u3002\u786e\u4fdd\u5728\u4ee3\u7801\u4e2d\u9002\u5f53\u5904\u7406\u8ba2\u9605\u7684\u751f\u547d\u5468\u671f\uff0c\u4ee5\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u6216\u4e0d\u5fc5\u8981\u7684\u8fde\u63a5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u5b9e\u73b0OPC\u6570\u636e\u8bbf\u95ee\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528OpenOPC\u5e93\u3001\u4f7f\u7528opcua\u5e93\u3001\u4f7f\u7528PyOPC\u5e93\u3002 \u5176\u4e2d [&hellip;]","protected":false},"author":3,"featured_media":1064481,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1064473"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1064473"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1064473\/revisions"}],"predecessor-version":[{"id":1064483,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1064473\/revisions\/1064483"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1064481"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1064473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1064473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1064473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}