{"id":94196,"date":"2026-08-13T22:24:51","date_gmt":"2026-08-13T14:24:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/94196.html"},"modified":"2026-08-13T22:24:51","modified_gmt":"2026-08-13T14:24:51","slug":"c-modbus-ascii-%e8%b6%85%e8%af%a6%e7%bb%86%e5%ae%8c%e6%95%b4%e7%ac%94%e8%ae%b0%ef%bc%88%e5%8d%8f%e8%ae%ae%e5%8e%9f%e7%90%86lrc%e7%ae%97%e6%b3%95%e8%af%bb%e5%86%99%e6%ba%90%e7%a0%81%e5%85%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/94196.html","title":{"rendered":"C# Modbus-ASCII \u8d85\u8be6\u7ec6\u5b8c\u6574\u7b14\u8bb0\uff08\u534f\u8bae\u539f\u7406+LRC\u7b97\u6cd5+\u8bfb\u5199\u6e90\u7801\u5168\u62c6\u89e3\uff09"},"content":{"rendered":"<h2>\u4e00\u3001Modbus \u57fa\u7840\u4f53\u7cfb\u77e5\u8bc6\u70b9&#xff08;\u5fc5\u80cc&#xff09;<\/h2>\n<h3>1.1 \u516d\u5927\u6838\u5fc3\u529f\u80fd\u7801\u542b\u4e49<\/h3>\n<p>Modbus \u6240\u6709\u901a\u4fe1\u5168\u90e8\u4f9d\u9760\u529f\u80fd\u7801\u533a\u5206\u64cd\u4f5c\u7c7b\u578b&#xff1a;<\/p>\n<ul>\n<li>\n<p>01&#xff1a;\u8bfb\u53d6\u7ebf\u5708\u5bc4\u5b58\u5668&#xff08;\u5f00\u5173\u91cf\u3001\u72b6\u6001\u91cf&#xff0c;\u53ea\u6709 0\/1&#xff0c;\u53ef\u8bfb\u53ef\u5199&#xff09;<\/p>\n<\/li>\n<li>\n<p>02&#xff1a;\u8bfb\u53d6\u79bb\u6563\u8f93\u5165\u72b6\u6001&#xff08;\u53ea\u8bfb\u5f00\u5173\u91cf&#xff09;<\/p>\n<\/li>\n<li>\n<p>03&#xff1a;\u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668&#xff08;\u6570\u503c\u578b\u3001\u53ef\u8bfb\u53ef\u5199\u3001\u6700\u5e38\u7528&#xff09;<\/p>\n<\/li>\n<li>\n<p>04&#xff1a;\u8bfb\u53d6\u8f93\u5165\u5bc4\u5b58\u5668&#xff08;\u4f20\u611f\u5668\u91c7\u96c6\u503c\u3001\u53ea\u8bfb&#xff09;<\/p>\n<\/li>\n<li>\n<p>06&#xff1a;\u5199\u5165\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668&#xff08;\u5b9a\u70b9\u5199\u51651\u4e2a\u6570\u503c&#xff09;<\/p>\n<\/li>\n<li>\n<p>16&#xff1a;\u5199\u5165\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668&#xff08;\u6279\u91cf\u5199\u5165&#xff09;<\/p>\n<\/li>\n<\/ul>\n<h3>1.2 \u7ebf\u5708\u5bc4\u5b58\u5668\u5b58\u50a8\u7279\u70b9<\/h3>\n<p>\u7ebf\u5708\u53ea\u6709 0 \/ 1 \u72b6\u6001&#xff0c;\u5982\u679c\u4e00\u4e2a\u72b6\u6001\u5360\u7528\u4e00\u4e2a\u5b57\u8282\u6781\u5ea6\u6d6a\u8d39\u7a7a\u95f4\u3002<\/p>\n<p>Modbus \u89c4\u5219&#xff1a;8 \u4e2a\u7ebf\u5708\u72b6\u6001 &#061; 1 \u4e2a\u5b57\u8282&#xff0c;\u7528\u5355\u5b57\u8282\u76848\u4e2aBit\u5206\u522b\u5b58\u50a88\u4e2a\u5f00\u5173\u72b6\u6001&#xff0c;\u6781\u81f4\u8282\u7701\u5e26\u5bbd\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001Modbus-RTU \u4e0e Modbus-ASCII \u6838\u5fc3\u533a\u522b&#xff08;\u8003\u8bd5\u9ad8\u9891&#xff09;<\/h2>\n<h3>2.1 Modbus-RTU&#xff08;\u4e8c\u8fdb\u5236\u6a21\u5f0f&#xff09;<\/h3>\n<ul>\n<li>\n<p>\u4f20\u8f93\u683c\u5f0f&#xff1a;\u7eaf\u5b57\u8282\u4e8c\u8fdb\u5236<\/p>\n<\/li>\n<li>\n<p>\u6821\u9a8c\u65b9\u5f0f&#xff1a;CRC16<\/p>\n<\/li>\n<li>\n<p>\u5e27\u7ed3\u6784&#xff1a;\u4ece\u673a\u5730\u5740 &#043; \u529f\u80fd\u7801 &#043; \u8d77\u59cb\u5730\u5740 &#043; \u6570\u636e\u957f\u5ea6 &#043; CRC\u6821\u9a8c&#xff08;\u56fa\u5b9a8\u5b57\u8282&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9&#xff1a;\u4f20\u8f93\u5feb\u3001\u6570\u636e\u7d27\u51d1\u3001\u5de5\u4e1a\u6700\u5e38\u7528<\/p>\n<\/li>\n<\/ul>\n<h3>2.2 Modbus-ASCII&#xff08;\u5b57\u7b26\u4e32\u6a21\u5f0f&#xff09;<\/h3>\n<ul>\n<li>\n<p>\u4f20\u8f93\u683c\u5f0f&#xff1a;ASCII \u5b57\u7b26\u4e32&#xff08;\u8089\u773c\u53ef\u8bfb&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u6821\u9a8c\u65b9\u5f0f&#xff1a;LRC \u7eb5\u5411\u5197\u4f59\u6821\u9a8c<\/p>\n<\/li>\n<li>\n<p>\u5e27\u683c\u5f0f&#xff1a;: &#043; \u6709\u6548\u6570\u636e &#043; LRC\u6821\u9a8c &#043; \\\\r\\\\n<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9&#xff1a;\u517c\u5bb9\u6027\u5f3a\u3001\u8c03\u8bd5\u76f4\u89c2\u3001\u4f20\u8f93\u6162\u3001\u5b57\u7b26\u5197\u4f59\u5927<\/p>\n<\/li>\n<\/ul>\n<h3>2.3 \u5e27\u683c\u5f0f\u5bf9\u6bd4&#xff08;\u6838\u5fc3\u8bb0\u5fc6\u70b9&#xff09;<\/h3>\n<p>RTU\u5e27&#xff1a;01 03 00 00 00 04 CRC\u4f4e CRC\u9ad8<\/p>\n<p>ASCII\u5e27&#xff1a;:010300000004XXXX\\\\r\\\\n<\/p>\n<p>XXXX \u4e3a LRC \u6821\u9a8c\u7801<\/p>\n<hr \/>\n<h2>\u4e09\u3001Modbus-ASCII \u901a\u4fe1\u5b8c\u6574\u6d41\u7a0b<\/h2>\n<li>\n<p>\u7a0b\u5e8f\u542f\u52a8&#xff0c;\u81ea\u52a8\u6253\u5f00\u4e32\u53e3<\/p>\n<\/li>\n<li>\n<p>\u7ec4\u88c5 6 \u5b57\u8282\u6709\u6548\u6307\u4ee4\u6570\u636e&#xff08;\u5730\u5740\u3001\u529f\u80fd\u7801\u3001\u8d77\u59cb\u5730\u5740\u3001\u957f\u5ea6&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u5bf96\u5b57\u8282\u6570\u636e\u8ba1\u7b97 LRC \u6821\u9a8c\u7801<\/p>\n<\/li>\n<li>\n<p>\u6309\u7167 ASCII \u534f\u8bae\u62fc\u63a5&#xff1a;\u5192\u53f7\u5f00\u5934 &#043; \u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32 &#043; LRC &#043; \u56de\u8f66\u6362\u884c<\/p>\n<\/li>\n<li>\n<p>\u4e32\u53e3\u53d1\u9001\u5b57\u7b26\u4e32\u6307\u4ee4<\/p>\n<\/li>\n<li>\n<p>\u63a5\u6536\u4e0b\u4f4d\u673a\u8fd4\u56de ASCII \u5b57\u7b26\u4e32<\/p>\n<\/li>\n<li>\n<p>\u622a\u53d6\u6570\u636e\u533a\u3001\u89e3\u67904\u4e2a\u5bc4\u5b58\u5668\u6570\u503c\u3001\u6253\u5370\u8f93\u51fa<\/p>\n<\/li>\n<li>\n<p>\u652f\u6301\u6309\u94ae\u89e6\u53d1 06\u529f\u80fd\u7801\u5355\u5bc4\u5b58\u5668\u5199\u5165<\/p>\n<\/li>\n<hr \/>\n<h2>\u56db\u3001\u6838\u5fc3\u7b97\u6cd5\u8be6\u89e3&#xff1a;LRC\u7eb5\u5411\u5197\u4f59\u6821\u9a8c&#xff08;\u9010\u539f\u7406\u62c6\u89e3&#xff09;<\/h2>\n<h3>4.1 LRC \u8ba1\u7b97\u516c\u5f0f&#xff08;\u56fa\u5b9a\u4e09\u6b65&#xff09;<\/h3>\n<p>LRC \u53ea\u5bf9\u6709\u6548\u6307\u4ee4\u5b57\u8282\u8ba1\u7b97&#xff0c;\u4e0d\u542b\u5e27\u5934\u5192\u53f7\u3001\u4e0d\u542b\\\\r\\\\n<\/p>\n<li>\n<p>\u5c06\u6240\u6709\u53c2\u4e0e\u6821\u9a8c\u7684\u5b57\u8282\u7d2f\u52a0\u6c42\u548c<\/p>\n<\/li>\n<li>\n<p>\u5bf9\u603b\u548c \u63098\u4f4d\u53d6\u53cd &#043; 1&#xff08;\u8865\u7801\u8fd0\u7b97&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u4e0e 0xFF \u505a\u4e0e\u8fd0\u7b97&#xff0c;\u5f3a\u5236\u622a\u65ad\u4e3a8\u4f4d&#xff0c;\u9632\u6b62\u6ea2\u51fa<\/p>\n<\/li>\n<h3>4.2 LRC \u5b8c\u6574\u6e90\u7801 &#043; \u9010\u884c\u6ce8\u91ca<\/h3>\n<p>\/\/\/ &lt;summary&gt;<br \/>\n\/\/\/ Modbus-ASCII \u4e13\u5c5e LRC \u6821\u9a8c\u7b97\u6cd5<br \/>\n\/\/\/ &lt;\/summary&gt;<br \/>\n\/\/\/ &lt;param name&#061;&#034;data&#034;&gt;\u9700\u8981\u6821\u9a8c\u7684\u6709\u6548\u5b57\u8282\u6570\u7ec4&#xff08;6\u5b57\u8282\u6307\u4ee4&#xff09;&lt;\/param&gt;<br \/>\n\/\/\/ &lt;returns&gt;\u4e24\u4f4d\u5341\u516d\u8fdb\u5236LRC\u6821\u9a8c\u5b57\u7b26\u4e32&lt;\/returns&gt;<br \/>\npublic static string CalcLRC(byte[] data)<br \/>\n{<br \/>\n    \/\/ 1.\u6240\u6709\u5b57\u8282\u7d2f\u52a0\u6c42\u548c<br \/>\n    uint sum &#061; (uint)data.Sum(x &#061;&gt; x);<\/p>\n<p>    \/\/ 2.\u603b\u548c8\u4f4d\u53d6\u53cd&#043;1 \u5f97\u5230\u8865\u7801<br \/>\n    \/\/ 3.&amp;0xff \u622a\u65ad\u9ad8\u4f4d&#xff0c;\u53ea\u4fdd\u7559\u4f4e8\u4f4d&#xff0c;\u4fdd\u8bc1LRC\u4e3a\u5355\u5b57\u8282<br \/>\n    uint res &#061; (~sum &#043; 1) &amp; 0xff;<\/p>\n<p>    \/\/ \u8f6c2\u4f4d\u5341\u516d\u8fdb\u5236\u5927\u5199\u5b57\u7b26\u4e32<br \/>\n    return res.ToString(&#034;X2&#034;);<br \/>\n}<\/p>\n<h3>4.3 LRC \u4e0e CRC16 \u672c\u8d28\u533a\u522b<\/h3>\n<ul>\n<li>\n<p>CRC16&#xff1a;16\u4f4d\u6821\u9a8c\u3001\u591a\u9879\u5f0f\u79fb\u4f4d\u5f02\u6216\u3001\u7cbe\u5ea6\u9ad8\u3001RTU\u4f7f\u7528<\/p>\n<\/li>\n<li>\n<p>LRC&#xff1a;8\u4f4d\u6821\u9a8c\u3001\u7d2f\u52a0\u53d6\u53cd\u8865\u7801\u3001\u7b97\u6cd5\u7b80\u5355\u3001ASCII\u4f7f\u7528<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e94\u3001ASCII\u8bf7\u6c42\u5e27\u7ec4\u88c5\u51fd\u6570&#xff08;\u6838\u5fc3\u6a21\u5757&#xff09;<\/h2>\n<h3>5.1 \u529f\u80fd\u8bf4\u660e<\/h3>\n<p>\u4f20\u51656\u5b57\u8282\u539f\u59cb\u6307\u4ee4\u6570\u7ec4&#xff0c;\u81ea\u52a8\u8f6cASCII\u5b57\u7b26\u4e32\u3001\u8ffd\u52a0LRC\u3001\u8ffd\u52a0\u534f\u8bae\u5934\u5c3e&#xff0c;\u751f\u6210\u53ef\u76f4\u63a5\u53d1\u9001\u7684\u6807\u51c6Modbus-ASCII\u5e27\u3002<\/p>\n<h3>5.2 \u6e90\u7801&#043;\u9010\u884c\u89e3\u6790<\/h3>\n<p>\/\/\/ &lt;summary&gt;<br \/>\n\/\/\/ \u751f\u6210\u6807\u51c6 Modbus-ASCII \u5b8c\u6574\u8bf7\u6c42\u5e27<br \/>\n\/\/\/ \u683c\u5f0f\u89c4\u5219 : &#043; \u6570\u636e\u4e32 &#043; LRC &#043; \\\\r\\\\n<br \/>\n\/\/\/ &lt;\/summary&gt;<br \/>\n\/\/\/ &lt;param name&#061;&#034;data&#034;&gt;6\u5b57\u8282\u6709\u6548\u6307\u4ee4\u6570\u636e&lt;\/param&gt;<br \/>\n\/\/\/ &lt;returns&gt;ASCII\u534f\u8bae\u5b8c\u6574\u5e27\u5b57\u7b26\u4e32&lt;\/returns&gt;<br \/>\npublic static string GetRequestFrame(byte[] data)<br \/>\n{<br \/>\n    \/\/ \u5148\u8ba1\u7b97\u5f53\u524d\u6307\u4ee4\u7684LRC\u6821\u9a8c\u7801<br \/>\n    string lrc &#061; CalcLRC(data);<\/p>\n<p>    \/\/ \u5c06\u6240\u6709\u5b57\u8282\u8f6c\u4e3a2\u4f4d\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32&#xff0c;\u62fc\u63a5\u4e3a\u957f\u4e32<br \/>\n    string requestData &#061; &#034;&#034;;<br \/>\n    foreach (byte b in data)<br \/>\n    {<br \/>\n        requestData &#043;&#061; b.ToString(&#034;X2&#034;);<br \/>\n    }<\/p>\n<p>    \/\/ \u534f\u8bae\u56fa\u5b9a\u683c\u5f0f&#xff1a;<br \/>\n    \/\/ \u5f00\u5934\u5192\u53f7 &#043; \u6307\u4ee4\u6570\u636e &#043; LRC\u6821\u9a8c &#043; \u7ed3\u5c3e\u56de\u8f66\u6362\u884c<br \/>\n    string value &#061; &#034;:&#034; &#043; requestData &#043; lrc &#043; &#034;\\\\r\\\\n&#034;;<\/p>\n<p>    return value;<br \/>\n}<\/p>\n<h3>5.4 \u6700\u7ec8\u751f\u6210\u5e27\u793a\u4f8b<\/h3>\n<p>\u8f93\u5165&#xff1a;01 03 00 00 00 04<\/p>\n<p>\u8f93\u51fa&#xff1a;:010300000004E0\\\\r\\\\n<\/p>\n<hr \/>\n<h2>\u516d\u3001ASCII \u54cd\u5e94\u5e27\u6570\u636e\u89e3\u6790\u51fd\u6570<\/h2>\n<h3>6.1 \u89e3\u6790\u89c4\u5219<\/h3>\n<p>Modbus-ASCII \u54cd\u5e94\u5e27\u6570\u636e\u533a&#xff1a;\u6bcf\u4e00\u4e2a\u5bc4\u5b58\u5668\u6570\u503c\u5360 4 \u4e2a\u5b57\u7b26&#xff08;2\u5b57\u8282\u5341\u516d\u8fdb\u5236&#xff09;<\/p>\n<p>\u56fa\u5b9a\u8d77\u59cb\u89e3\u6790\u4e0b\u6807&#xff1a;7<\/p>\n<h3>6.2 \u5b8c\u6574\u6e90\u7801&#043;\u9010\u884c\u6ce8\u91ca<\/h3>\n<p>\/\/\/ &lt;summary&gt;<br \/>\n\/\/\/ \u4eceASCII\u54cd\u5e94\u5b57\u7b26\u4e32\u4e2d\u6279\u91cf\u89e3\u6790\u4fdd\u6301\u5bc4\u5b58\u5668\u6570\u503c<br \/>\n\/\/\/ &lt;\/summary&gt;<br \/>\n\/\/\/ &lt;param name&#061;&#034;s&#034;&gt;\u4e0b\u4f4d\u673a\u8fd4\u56de\u5b8c\u6574ASCII\u5b57\u7b26\u4e32&lt;\/param&gt;<br \/>\n\/\/\/ &lt;param name&#061;&#034;valueCount&#034;&gt;\u9700\u8981\u89e3\u6790\u7684\u5bc4\u5b58\u5668\u4e2a\u6570&lt;\/param&gt;<br \/>\n\/\/\/ &lt;param name&#061;&#034;startIndex&#034;&gt;\u6570\u636e\u533a\u8d77\u59cb\u4e0b\u6807&#xff0c;\u9ed8\u8ba47&lt;\/param&gt;<br \/>\n\/\/\/ &lt;returns&gt;ushort\u5bc4\u5b58\u5668\u6570\u503c\u6570\u7ec4&lt;\/returns&gt;<br \/>\npublic static ushort[] StringToUshort(string s, int valueCount, int startIndex &#061; 7)<br \/>\n{<br \/>\n    \/\/ \u957f\u5ea6\u6821\u9a8c&#xff1a;\u9632\u6b62\u5b57\u7b26\u4e32\u8fc7\u77ed\u8d8a\u754c\u62a5\u9519<br \/>\n    if (valueCount * 4 &#043; startIndex &gt; s.Length)<br \/>\n    {<br \/>\n        throw new ArgumentException(&#034;\u54cd\u5e94\u5b57\u7b26\u4e32\u4e2a\u6570\u4e0d\u591f&#034;);<br \/>\n    }<\/p>\n<p>    \/\/ \u5b9a\u4e49\u6570\u7ec4\u5b58\u50a8\u89e3\u6790\u540e\u7684\u6570\u503c<br \/>\n    ushort[] bs &#061; new ushort[valueCount];<\/p>\n<p>    for (int i &#061; 0; i &lt; valueCount; i&#043;&#043;)<br \/>\n    {<br \/>\n        \/\/ \u622a\u53d64\u4e2a\u5b57\u7b26 &#061; 1\u4e2a\u5bc4\u5b58\u56682\u5b57\u8282\u6570\u636e<br \/>\n        string value &#061; s.Substring(startIndex, 4);<\/p>\n<p>        \/\/ \u4e0b\u6b21\u8bfb\u53d6\u4f4d\u7f6e\u540e\u79fb4\u4f4d<br \/>\n        startIndex &#043;&#061; 4;<\/p>\n<p>        \/\/ \u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32\u8f6c\u6570\u503c<br \/>\n        bs[i] &#061; Convert.ToUInt16(value);<br \/>\n    }<br \/>\n    return bs;<br \/>\n}<\/p>\n<h2>\u4e03\u3001\u4e32\u53e3\u521d\u59cb\u5316 &#043; \u81ea\u52a8\u8bfb\u53d6\u903b\u8f91<\/h2>\n<p>\/\/ \u5168\u5c40\u4e32\u53e3\u5b9a\u4e49&#xff1a;COM1\u30019600\u6ce2\u7279\u7387\u3001\u65e0\u6821\u9a8c\u30018\u6570\u636e\u4f4d\u30011\u505c\u6b62\u4f4d<br \/>\npublic SerialPort port &#061; new SerialPort(&#034;COM1&#034;, 9600, Parity.None, 8, StopBits.One);<\/p>\n<p>public Form1()<br \/>\n{<br \/>\n    InitializeComponent();<\/p>\n<p>    \/\/ \u6253\u5f00\u4e32\u53e3<br \/>\n    port.Open();<br \/>\n    \/\/ \u7ed1\u5b9a\u6570\u636e\u63a5\u6536\u4e8b\u4ef6<br \/>\n    port.DataReceived &#043;&#061; Port_DataReceived;<\/p>\n<p>    \/\/ \u7ec4\u88c5\u8bfb\u53d6\u6307\u4ee4&#xff1a;\u4ece\u7ad91\u300103\u529f\u80fd\u7801\u30010\u5730\u5740\u3001\u8bfb\u53d64\u4e2a\u5bc4\u5b58\u5668<br \/>\n    string s2 &#061; GetRequestFrame(new byte[] { 01, 03, 00, 00, 00, 04 });<br \/>\n    Console.WriteLine(s2);<\/p>\n<p>    \/\/ \u53d1\u9001ASCII\u8bfb\u53d6\u6307\u4ee4<br \/>\n    port.Write(s2);<br \/>\n}<\/p>\n<h2>\u516b\u3001\u4e32\u53e3\u6570\u636e\u63a5\u6536\u4e8b\u4ef6&#xff08;\u54cd\u5e94\u5e27\u89e3\u6790&#xff09;<\/h2>\n<p>private void Port_DataReceived(object sender, SerialDataReceivedEventArgs e)<br \/>\n{<br \/>\n    \/\/ \u83b7\u53d6\u7f13\u51b2\u533a\u6570\u636e\u957f\u5ea6<br \/>\n    int readLength &#061; port.BytesToRead;<br \/>\n    byte[] bs &#061; new byte[readLength];<\/p>\n<p>    \/\/ \u8bfb\u53d6\u4e32\u53e3\u6570\u636e<br \/>\n    port.Read(bs, 0, readLength);<\/p>\n<p>    \/\/ \u5b57\u8282\u8f6cASCII\u5b57\u7b26\u4e32&#xff0c;\u53bb\u9664\u9996\u5c3e\\\\r\\\\n<br \/>\n    string s &#061; Encoding.ASCII.GetString(bs).Trim(&#039;\\\\r&#039;, &#039;\\\\n&#039;);<br \/>\n    Console.WriteLine(s);<\/p>\n<p>    \/\/ \u5224\u65ad\u662f\u5426\u4e3a03\u529f\u80fd\u7801\u8bfb\u53d6\u54cd\u5e94<br \/>\n    if (s.Contains(&#034;03&#034;))<br \/>\n    {<br \/>\n        \/\/ \u89e3\u67904\u4e2a\u5bc4\u5b58\u5668\u6570\u636e<br \/>\n        ushort[] us &#061; StringToUshort(s, 4);<br \/>\n        Console.WriteLine(us[0] &#043; &#034;:&#034; &#043; us[1] &#043; &#034;:&#034; &#043; us[2] &#043; &#034;:&#034; &#043; us[3]);<br \/>\n    }<br \/>\n}<\/p>\n<h2>\u4e5d\u300106\u529f\u80fd\u7801&#xff1a;\u5355\u4e2a\u5bc4\u5b58\u5668\u5199\u5165\u529f\u80fd&#xff08;\u6309\u94ae\u4e8b\u4ef6&#xff09;<\/h2>\n<h3>9.1 \u5199\u5165\u6307\u4ee4\u89c4\u5219<\/h3>\n<p>06\u529f\u80fd\u7801\u5e27\u7ed3\u6784&#xff1a;\u4ece\u7ad9\u5730\u5740 &#043; 06 &#043; \u5199\u5165\u5730\u5740\u9ad88\u4f4d &#043; \u5199\u5165\u5730\u5740\u4f4e8\u4f4d &#043; \u5199\u5165\u503c\u9ad88\u4f4d &#043; \u5199\u5165\u503c\u4f4e8\u4f4d<\/p>\n<h3>9.2 \u5199\u5165\u6e90\u7801\u9010\u884c\u89e3\u6790<\/h3>\n<p>private void button1_Click(object sender, EventArgs e)<br \/>\n{<br \/>\n    byte add &#061; 0x01;       \/\/ \u4ece\u7ad9\u5730\u5740<br \/>\n    byte func &#061; 0x06;      \/\/ \u5199\u5165\u5355\u4e2a\u5bc4\u5b58\u5668\u529f\u80fd\u7801<br \/>\n    ushort addres &#061; 0x0010;\/\/ \u76ee\u6807\u5199\u5165\u5730\u5740<br \/>\n    ushort value &#061; 0x1234; \/\/ \u76ee\u6807\u5199\u5165\u6570\u503c<\/p>\n<p>    \/\/ \u62c6\u5206\u9ad8\u4f4e\u5b57\u8282&#xff08;\u5927\u7aef\u6a21\u5f0f&#xff09;<br \/>\n    byte[] bs &#061;<br \/>\n    {<br \/>\n        add,<br \/>\n        func,<br \/>\n        (byte)(addres &gt;&gt; 8),   \/\/ \u5730\u5740\u9ad88\u4f4d<br \/>\n        (byte)(addres &amp; 0xff),  \/\/ \u5730\u5740\u4f4e8\u4f4d<br \/>\n        (byte)(value &gt;&gt; 8),     \/\/ \u6570\u503c\u9ad88\u4f4d<br \/>\n        (byte)(value &amp; 0xff)    \/\/ \u6570\u503c\u4f4e8\u4f4d<br \/>\n    };<\/p>\n<p>    \/\/ \u751f\u6210ASCII\u5199\u5165\u5e27\u5e76\u53d1\u9001<br \/>\n    string s &#061; GetRequestFrame(bs);<br \/>\n    port.Write(s);<br \/>\n}<\/p>\n<h2>\u5341\u3001RTU\u4e0eASCII \u5b8c\u6574\u5e27\u5bf9\u7167\u603b\u7ed3<\/h2>\n<h3>10.1 RTU\u8bfb\u53d6\u5e27&#xff08;8\u5b57\u8282&#xff09;<\/h3>\n<p>01 03 00 00 00 04 CRC\u4f4e CRC\u9ad8<\/p>\n<h3>10.2 ASCII\u8bfb\u53d6\u5e27&#xff08;\u5b57\u7b26\u4e32&#xff09;<\/h3>\n<p>:010300000004LRC\\\\r\\\\n<\/p>\n<h3>10.3 RTU\u54cd\u5e94\u5e27<\/h3>\n<p>01 03 08 0001 0002 0003 0004 CRC<\/p>\n<h3>10.4 ASCII\u54cd\u5e94\u5e27<\/h3>\n<p>:0103080001000200030004XX\\\\r\\\\n<\/p>\n<hr \/>\n<h2>\u5341\u4e00\u3001\u5168\u5957\u6838\u5fc3\u8003\u70b9\u603b\u7ed3<\/h2>\n<ul>\n<li>\n<p>ASCII \u72ec\u6709\u7279\u5f81&#xff1a;\u5192\u53f7\u5f00\u5934\u3001\u56de\u8f66\u6362\u884c\u7ed3\u5c3e\u3001LRC\u6821\u9a8c\u3001\u5b57\u7b26\u4e32\u4f20\u8f93<\/p>\n<\/li>\n<li>\n<p>RTU \u72ec\u6709\u7279\u5f81&#xff1a;\u4e8c\u8fdb\u5236\u5b57\u8282\u3001CRC16\u6821\u9a8c\u3001\u65e0\u591a\u4f59\u5b57\u7b26<\/p>\n<\/li>\n<li>\n<p>LRC\u4e09\u6b65\u516c\u5f0f&#xff1a;\u6c42\u548c \u2192 \u53d6\u53cd&#043;1 \u2192 &amp;0xff\u622a\u65ad<\/p>\n<\/li>\n<li>\n<p>\u9ad8\u4f4e\u5b57\u8282\u62c6\u5206&#xff1a;\u53f3\u79fb8\u4f4d\u53d6\u9ad8\u5b57\u8282&#xff0c;\u4e0e0xff\u53d6\u4f4e\u5b57\u8282<\/p>\n<\/li>\n<li>\n<p>ASCII\u89e3\u6790\u89c4\u5219&#xff1a;\u5355\u5bc4\u5b58\u56684\u4e2a\u5b57\u7b26&#xff0c;\u56fa\u5b9a\u504f\u79fb7\u5f00\u59cb<\/p>\n<\/li>\n<li>\n<p>03\u8bfb\u300106\u5199\u662f\u5de5\u4e1a\u8bbe\u5907\u6700\u5e38\u7528\u4e24\u4e2a\u529f\u80fd\u7801<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u5341\u4e8c\u3001\u9879\u76ee\u6574\u4f53\u8fd0\u884c\u6d41\u7a0b<\/h2>\n<li>\n<p>\u7a0b\u5e8f\u542f\u52a8 \u2192 \u521d\u59cb\u5316\u4e32\u53e3\u5e76\u6253\u5f00<\/p>\n<\/li>\n<li>\n<p>\u81ea\u52a8\u7ec4\u88c503\u8bfb\u53d6\u6307\u4ee4 \u2192 \u8ba1\u7b97LRC \u2192 \u751f\u6210ASCII\u6807\u51c6\u5e27<\/p>\n<\/li>\n<li>\n<p>\u4e32\u53e3\u4e0b\u53d1\u8bfb\u53d6\u6307\u4ee4<\/p>\n<\/li>\n<li>\n<p>\u4e0b\u4f4d\u673a\u8fd4\u56deASCII\u5b57\u7b26\u4e32\u54cd\u5e94\u5e27<\/p>\n<\/li>\n<li>\n<p>\u7a0b\u5e8f\u63a5\u6536\u3001\u6e05\u6d17\u5b57\u7b26\u4e32\u3001\u89e3\u67904\u8def\u5bc4\u5b58\u5668\u6570\u636e<\/p>\n<\/li>\n<li>\n<p>\u70b9\u51fb\u6309\u94ae\u53ef\u89e6\u53d106\u5355\u4e2a\u5bc4\u5b58\u5668\u5199\u5165\u64cd\u4f5c<\/p>\n<\/li>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Modbus \u57fa\u7840\u4f53\u7cfb\u77e5\u8bc6\u70b9&#xff08;\u5fc5\u80cc&#xff09;1.1 \u516d\u5927\u6838\u5fc3\u529f\u80fd\u7801\u542b\u4e49Modbus \u6240\u6709\u901a\u4fe1\u5168\u90e8\u4f9d\u9760\u529f\u80fd\u7801\u533a\u5206\u64cd\u4f5c\u7c7b\u578b&#xff1a;01&#xff1a;\u8bfb\u53d6\u7ebf\u5708\u5bc4\u5b58\u5668&#xff08;\u5f00\u5173\u91cf\u3001\u72b6\u6001\u91cf&#xff0c;\u53ea\u6709 0\/1&#xff0c;\u53ef\u8bfb\u53ef\u5199&#xff09;02&#xff1a;\u8bfb\u53d6\u79bb\u6563\u8f93\u5165\u72b6\u6001&#xff08;\u53ea\u8bfb\u5f00\u5173\u91cf&#xff09;03&#xff1a;\u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668&#xff08;\u6570\u503c\u578b\u3001\u53ef\u8bfb\u53ef\u5199\u3001\u6700\u5e38\u7528&#xff09;04&#xff1a;\u8bfb<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[305],"topic":[],"class_list":["post-94196","post","type-post","status-publish","format-standard","hentry","category-server","tag-305"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C# Modbus-ASCII \u8d85\u8be6\u7ec6\u5b8c\u6574\u7b14\u8bb0\uff08\u534f\u8bae\u539f\u7406+LRC\u7b97\u6cd5+\u8bfb\u5199\u6e90\u7801\u5168\u62c6\u89e3\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/94196.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# Modbus-ASCII \u8d85\u8be6\u7ec6\u5b8c\u6574\u7b14\u8bb0\uff08\u534f\u8bae\u539f\u7406+LRC\u7b97\u6cd5+\u8bfb\u5199\u6e90\u7801\u5168\u62c6\u89e3\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e00\u3001Modbus \u57fa\u7840\u4f53\u7cfb\u77e5\u8bc6\u70b9&#xff08;\u5fc5\u80cc&#xff09;1.1 \u516d\u5927\u6838\u5fc3\u529f\u80fd\u7801\u542b\u4e49Modbus \u6240\u6709\u901a\u4fe1\u5168\u90e8\u4f9d\u9760\u529f\u80fd\u7801\u533a\u5206\u64cd\u4f5c\u7c7b\u578b&#xff1a;01&#xff1a;\u8bfb\u53d6\u7ebf\u5708\u5bc4\u5b58\u5668&#xff08;\u5f00\u5173\u91cf\u3001\u72b6\u6001\u91cf&#xff0c;\u53ea\u6709 0\/1&#xff0c;\u53ef\u8bfb\u53ef\u5199&#xff09;02&#xff1a;\u8bfb\u53d6\u79bb\u6563\u8f93\u5165\u72b6\u6001&#xff08;\u53ea\u8bfb\u5f00\u5173\u91cf&#xff09;03&#xff1a;\u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668&#xff08;\u6570\u503c\u578b\u3001\u53ef\u8bfb\u53ef\u5199\u3001\u6700\u5e38\u7528&#xff09;04&#xff1a;\u8bfb\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/94196.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-13T14:24:51+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" 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