{"id":25202,"date":"2023-10-02T22:13:55","date_gmt":"2023-10-02T14:13:55","guid":{"rendered":"https:\/\/www.modbus.cn\/?p=25202"},"modified":"2023-10-02T22:16:12","modified_gmt":"2023-10-02T14:16:12","slug":"shu-ju-zhen-ge-shi-rtu-zhen-ascii-zhen-de-qu-bie-modbus-tong-xun-xie-yi-yao-dian-di-4-bu-fen","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/25202.html","title":{"rendered":"\u6570\u636e\u5e27\u683c\u5f0f – RTU\u5e27 & ASCII\u5e27\u7684\u533a\u522b-Modbus\u901a\u8baf\u534f\u8bae\u8981\u70b9\u7b2c4\u90e8\u5206"},"content":{"rendered":"

Modbus\u65e2\u7136\u662f\u4e00\u79cd\u901a\u4fe1\u534f\u8bae\uff0c\u90a3\u5b83\u5c31\u5e94\u8be5\u6709\u89c4\u5b9a\u7684\u901a\u4fe1\u683c\u5f0f\u7528\u4e8e\u5728\u8bbe\u5907\u4e4b\u95f4\u7684\u6307\u4ee4\u63a5\u6536\u4e0e\u8bc6\u522b\u3002<\/p>\n\n\n\n

\u672c\u6587\u5c31\u7740\u91cd\u8bb2\u8bb2Modbus\u534f\u8bae\u7684RTU\u5e27\u548cASCII\u5e27\u3002<\/p>\n\n\n\n

Modbus\u5e27\u5728\u4e32\u884c\u94fe\u8def\u4e0a\u7684\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

<\/figure>\n\n\n\n

\u5728\u4e0a\u56fe\u7684\u683c\u5f0f\u4e2d\uff1a<\/p>\n\n\n\n

1\uff09\u5730\u5740\u57df\uff1a<\/strong>\u6307\u4ee3\u7684\u662f\u5b50\u8282\u70b9\u5730\u5740\u3002\u5408\u6cd5\u7684\u5b50\u8282\u70b9\u5730\u5740\u4e3a 0 \u2013 247\u3002 \u6bcf\u4e2a\u5b50\u8bbe\u5907\u88ab\u8d4b\u4e88 1 \u2013 247 \u8303\u56f4\u4e2d\u7684\u5730\u5740\u3002\u4e3b\u8282\u70b9\u901a\u8fc7\u5c06\u5b50\u8282\u70b9\u7684\u5730\u5740\u653e\u5230\u62a5\u6587\u7684\u5730\u5740\u57df\u5bf9\u5b50\u8282\u70b9\u5bfb\u5740\u3002\u5f53\u5b50\u8282\u70b9\u8fd4\u56de\u5e94\u7b54\u65f6\uff0c \u5b83\u5c06\u81ea\u5df1\u7684\u5730\u5740\u653e\u5230\u5e94\u7b54\u62a5\u6587\u7684\u5730\u5740\u57df\u4ee5\u8ba9\u4e3b\u8282\u70b9\u77e5\u9053\u54ea\u4e2a\u5b50\u8282\u70b9\u5728\u56de\u7b54\u3002<\/p>\n\n\n\n

2\uff09\u529f\u80fd\u7801\uff1a<\/strong>\u6307\u660e\u670d\u52a1\u5668\u8981\u6267\u884c\u7684\u52a8\u4f5c\u3002<\/p>\n\n\n\n

3\uff09\u6570\u636e\u57df\uff1a<\/strong>\u529f\u80fd\u7801\u540e\u9762\u7684\u6709\u8868\u793a\u542b\u6709\u8bf7\u6c42\u548c\u54cd\u5e94\u53c2\u6570\u7684\u6570\u636e\u3002<\/p>\n\n\n\n

4\uff09\u9519\u8bef\u68c0\u9a8c\uff1a<\/strong>\u662f\u5bf9\u62a5\u6587\u5185\u5bb9\u6267\u884c “\u5197\u4f59\u6821\u9a8c” \u7684\u8ba1\u7b97\u7ed3\u679c\u3002\u6839\u636e\u4e0d\u540c\u7684\u4f20\u8f93\u6a21\u5f0f (RTU or ASCII)\u4f7f\u7528\u4e24\u79cd\u4e0d\u540c\u7684\u8ba1\u7b97\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u4e0a\u9762\u8bf4\u660e\u4e86Modbus\u7684\u5e27\u683c\u5f0f\uff0c\u662f\u4e00\u79cd\u89c4\u5b9a\u7684\u6570\u636e\u6253\u5305\u7684\u89c4\u7ea6\u3002<\/p>\n\n\n\n

Modbus\u4e2d\u6709\u4e24\u79cd\u4e32\u884c\u4f20\u8f93\u6a21\u5f0f: RTU \u6a21\u5f0f \u548c ASCII \u6a21\u5f0f\u3002\u5b83\u5b9a\u4e49\u4e86\u62a5\u6587\u57df\u7684\u5185\u5bb9\u5728\u7ebf\u8def\u4e0a\u4e32\u884c\u7684\u4f20\u9001\u3002\u5b83\u786e\u5b9a\u4e86\u4fe1\u606f\u5982\u4f55\u6253\u5305\u4e3a\u62a5\u6587\u548c\u89e3\u7801\u3002<\/p>\n\n\n\n

\u6240\u6709\u8bbe\u5907\u5fc5\u987b\u5b9e\u73b0 RTU \u6a21\u5f0f\uff0cASCII \u6a21\u5f0f\u662f\u5907\u9009\u9879\u3002<\/strong><\/p>\n\n\n\n

1\u3001Modbus RTU\u5e27\u6a21\u5f0f<\/strong><\/h1>\n\n\n\n

RTU\u5e27\u6307\u7684\u662f\u4ec0\u4e48\u5462\uff1f\u7b80\u5355\u800c\u8a00\u5c31\u662f\u62a5\u6587\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u90fd\u662f\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a\u7684\u3002<\/p>\n\n\n\n

RTU\u5e27\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u6570\u636e\u7684\u683c\u5f0f\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u6bcf\u4e2a\u5b57\u8282\u4e3a8bit\r\n\u62a5\u6587\u4e2d\u6bcf\u4e2a 8 \u4f4d\u5b57\u8282\u542b\u6709\u4e24\u4e2a 4 \u4f4d\u5341\u516d\u8fdb\u5236\u5b57\u7b26(0\u20139\uff0c A\u2013F)\r\n\r\nBits per Byte: \r\n1 \u8d77\u59cb\u4f4d\r\n8 \u6570\u636e\u4f4d\uff0c\u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d\r\n1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c\r\n1 \u505c\u6b62\u4f4d\r\n\r\n\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002\r\n<\/code><\/pre>\n\n\n\n
\u6bcf\u4e2a\u5b57\u8282\u4e3a8bit<\/code>\u62a5\u6587\u4e2d\u6bcf\u4e2a 8 \u4f4d\u5b57\u8282\u542b\u6709\u4e24\u4e2a 4 \u4f4d\u5341\u516d\u8fdb\u5236\u5b57\u7b26(0\u20139\uff0c A\u2013F)<\/code>
<\/code>Bits per Byte: <\/code>1 \u8d77\u59cb\u4f4d<\/code>8 \u6570\u636e\u4f4d\uff0c\u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d<\/code>1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c<\/code>1 \u505c\u6b62\u4f4d<\/code>
<\/code>\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002<\/code><\/code><\/p>\n\n\n\n
\u5b57\u7b26\u7684\u4f20\u9001\u6d41\u662fLSB\u5148\u53d1\u9001\uff0c\u6700\u540e\u624d\u662fMSB\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\u6709\u5947\u5076\u6821\u9a8c\u7684\uff1a<\/p>\n\n\n\n
\"\u6570\u636e\u5e27\u683c\u5f0f\u65e0\u5947\u5076\u6821\u9a8c\u7684\uff1a<\/p>\n\n\n\n
\"\u6570\u636e\u5e27\u683c\u5f0f<\/p>\n\n\n\n
\u91cd\u70b9\u6765\u4e86\uff0cRTU\u7684\u62a5\u6587\u5e27\u683c\u5f0f\uff1a<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\"\u6570\u636e\u5e27\u683c\u5f0f<\/p>\n\n\n\n
Modbus RTU\u5e27\u7684\u6700\u5927\u957f\u5ea6\u4e3a256\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n
2\u3001Modbus ASCII\u5e27\u6a21\u5f0f<\/strong><\/h1>\n\n\n\n
Modbus ASCII\u5e27\u4e2d\u89c4\u5b9a\u62a5\u6587\u7684\u6bcf\u4e2a\u5b57\u8282\u6570\u636e\u4ee5\u4e24\u4e2aASCII\u5b57\u7b26\u8fdb\u884c\u53d1\u9001\u3002<\/p>\n\n\n\n
\u600e\u4e48\u7406\u89e3\u5462\uff1f<\/p>\n\n\n\n
 \u4f8b : \u6709\u4e00\u4e2a\u6570\u636e\u5b57\u8282\u4e3a 0X5B\uff0c\u5b83\u4f1a\u88ab\u7f16\u7801\u4e3a\u4e24\u4e2a\u5b57\u7b26 : 0x35 \u548c 0x42 (ASCII \u7f16\u7801 0x35 =”5″\uff0c 0x42 =”B” )\u3002<\/strong><\/p>\n\n\n\n
ASCII\u00a0\u6a21\u5f0f\u8282\u6bcf\u4e2a\u5b57\u8282\u00a0(10\u00a0\u4f4d\u00a0)\u00a0\u00a0\u4e3a\u7684\u683c\u5f0f\u4e3a\u00a0:\u00a0<\/p>\n\n\n\n
\u62a5\u6587\u4e2d\u6bcf\u4e2a ASCII \u5b57\u7b26\u542b\u6709 1 \u4e2a\u5341\u516d\u8fdb\u5236\u5b57\u7b26\r\nBits per Byte: \r\n1 \u8d77\u59cb\u4f4d\r\n7 \u6570\u636e\u4f4d\uff0c \u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d\r\n1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c\r\n1 \u505c\u6b62\u4f4d\r\n\r\n\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002\r\n<\/code><\/pre>\n\n\n\n
\u62a5\u6587\u4e2d\u6bcf\u4e2a ASCII \u5b57\u7b26\u542b\u6709 1 \u4e2a\u5341\u516d\u8fdb\u5236\u5b57\u7b26<\/code>Bits per Byte: <\/code>1 \u8d77\u59cb\u4f4d<\/code>7 \u6570\u636e\u4f4d\uff0c \u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d<\/code>1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c<\/code>1 \u505c\u6b62\u4f4d<\/code>
<\/code>\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002<\/code><\/code><\/p>\n\n\n\n
\u5b57\u7b26\u662f\u5982\u4f55\u4e32\u884c\u4f20\u9001\u7684: <\/p>\n\n\n\n
\u6709\u5947\u5076\u6821\u9a8c\u7684\uff1a<\/p>\n\n\n\n
\"\u6570\u636e\u5e27\u683c\u5f0f\u65e0\u5947\u5076\u6821\u9a8c\u7684\uff1a<\/p>\n\n\n\n
\"\u6570\u636e\u5e27\u683c\u5f0f<\/p>\n\n\n\n
Modbus ASCII\u7684\u62a5\u6587\u5e27\u683c\u5f0f\uff1a<\/p>\n\n\n\n
<\/figure>\n\n\n\n
ASCII\u62a5\u6587\u5e27\u4e0eRTU\u62a5\u6587\u5e27\u6709\u5f88\u5927\u7684\u4e0d\u540c\uff0cASCII\u62a5\u6587\u5e27\u4e2d\u662f\u5e26\u6709\u5f00\u5934\u548c\u7ed3\u675f\u6807\u8bc6\u7b26\u7684\uff0c\u8fd9\u5bf9\u8bbe\u5907\u63a5\u6536\u62a5\u6587\u5e27\u5f88\u65b9\u4fbf\u3002\u8bbe\u5907\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u77e5\u9053\u4e00\u4e2a\u65b0\u62a5\u6587\u5e27\u7684\u5f00\u5934\uff0c\u5e76\u4e14\u77e5\u9053\u62a5\u6587\u4ec0\u4e48\u65f6\u5019\u7ed3\u675f\u4e86\u3002<\/p>\n\n\n\n
RTU\u62a5\u6587\u5e27\u4e2d\u5e76\u6ca1\u6709\u8fd9\u6837\u7684\u6807\u8bc6\u7b26\uff0c\u6240\u4ee5\u5728\u63a5\u6536\u62a5\u6587\u5e27\u7684\u65f6\u5019\u5c31\u9700\u8981\u505a\u4e9b\u5904\u7406\uff0c\u65b9\u80fd\u5224\u65ad\u62a5\u6587\u662f\u5426\u5b8c\u6210\u4e86\u4e00\u5e27\u6570\u636e\u7684\u63a5\u6536\u3002<\/p>\n\n\n\n
ASCII\u62a5\u6587\u5e27\u4e2d\u7528\u5192\u53f7(:)(ASCII\u7684\u5341\u516d\u8fdb\u5236\u4e3a0x3A)\u4f5c\u4e3a\u8d77\u59cb\uff0c\u7528\u56de\u8f66\u6362\u884c(CR LF)(ASCII\u7684\u5341\u516d\u8fdb\u5236\u4e3a0x0D 0x0A)\u4f5c\u4e3a\u7ed3\u675f\u3002<\/p>\n\n\n\n
\u7531\u4e8eASCII\u6a21\u5f0f\u4e0b\u6bcf\u4e2a\u5b57\u7b26\u5b57\u8282\u9700\u8981\u7528\u4e24\u4e2a\u5b57\u7b26\u7f16\u7801\uff0c\u6240\u4ee5\u4e3a\u4e86\u786e\u4fdd ASCII \u6a21\u5f0f \u548c RTU \u6a21\u5f0f\u5728 Modbus \u5e94\u7528\u7ea7\u517c\u5bb9\uff0cASCII\u6570\u636e\u57df\u6700\u5927\u6570\u636e\u957f\u5ea6\u4e3a (2×252) \u662f RTU \u6570\u636e\u57df (252) \u7684\u4e24\u500d\u3002\u56e0\u6b64\uff0cModbusASCII \u5e27\u7684\u6700\u5927\u5c3a\u5bf8\u4e3a 513 \u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n
3\u3001RTU\u5e27\u4e0eASCII\u5e27\u7684\u4f20\u8f93\u533a\u522b<\/h1>\n\n\n\n
\u524d\u9762\u5df2\u7ecf\u5206\u6790\u4e86RTU\u62a5\u6587\u5e27\u548cASCII\u62a5\u6587\u5e27\u7684\u533a\u522b\uff0cRTU\u62a5\u6587\u5e27\u662f\u4e0d\u5e26\u5f00\u59cb\u548c\u7ed3\u675f\u6807\u8bc6\u7b26\u7684\uff0c\u800cASCII\u62a5\u6587\u5e27\u4e2d\u5e26\u6709\u5f00\u59cb\u548c\u7ed3\u675f\u6807\u8bc6\u7b26\u3002\u6240\u4ee5\u5728\u8bbe\u5907\u63a5\u6536RTU\u5e27\u548cASCII\u5e27\u7684\u65f6\u5019\u5904\u7406\u65b9\u5f0f\u5c31\u4f1a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n\n\n\n
\uff081\uff09RTU\u5e27\u7684\u62a5\u6587\u4f20\u8f93<\/strong><\/p>\n\n\n\n
\u73b0\u5728\u601d\u8003\u4e00\u4e2a\u95ee\u9898\uff1aRTU\u5e27\u4e2d\u56e0\u4e3a\u6ca1\u6709\u5f00\u59cb\u548c\u7ed3\u675f\u7684\u6807\u8bc6\u7b26\uff0c\u8bbe\u5907\u8981\u600e\u4e48\u77e5\u9053\u5df2\u7ecf\u63a5\u6536\u5b8c\u6210\u4e86\u4e00\u5e27\u62a5\u6587\u4e86\u5462\uff1f<\/p>\n\n\n\n
\u4e3a\u4e86\u80fd\u591f\u786e\u8ba4\u62a5\u6587\u88ab\u5b8c\u6574\u63a5\u6536\uff0c\u4e0d\u81f3\u4e8e\u63a5\u6536\u5230\u4e0d\u5b8c\u6574\u7684\u62a5\u6587\u5c31\u8fdb\u884c\u62a5\u6587\u89e3\u6790\u548c\u5904\u7406\uff0c\u6240\u4ee5\u5fc5\u987b\u8981\u60f3\u529e\u6cd5\u53bb\u786e\u8ba4\u4e00\u5e27\u62a5\u6587\u5df2\u7ecf\u5b8c\u6210\u63a5\u6536\uff0c\u7136\u540e\u518d\u53bb\u5904\u7406\u3002<\/p>\n\n\n\n
\u5728RTU\u6a21\u5f0f\u4e2d\uff0c\u4e3a\u4e86\u6807\u8bc6\u4e0d\u540c\u7684\u62a5\u6587\u5e27\uff0c\u5728\u62a5\u6587\u5e27\u4e4b\u95f4\u63d2\u5165\u4e00\u4e2a\u7a7a\u95f2\u65f6\u95f4\u95f4\u9694\uff0c\u5728\u4e24\u5e27\u62a5\u6587\u4e4b\u95f4\u7528\u81f3\u5c113.5\u4e2a\u5b57\u7b26\u7684\u7a7a\u95f2\u65f6\u95f4\u6765\u533a\u5206\u4e0d\u540c\u7684\u5e27\uff0c\u540c\u65f6\u6807\u8bc6\u4e00\u5e27\u662f\u5426\u5df2\u7ecf\u5b8c\u6210\u63a5\u6536\u3002\u8fd9\u4e2a\u65f6\u95f4\u4e5f\u79f0\u4e3at3.5\u65f6\u95f4\u95f4\u9694\u3002<\/p>\n\n\n\n
\u8fd9\u6837\u7684\u64cd\u4f5c\u65b9\u5f0f\u770b\u4e0b\u56fe\u8fdb\u884c\u7406\u89e3\uff1a<\/p>\n\n\n\n
<\/figure>\n\n\n\n
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