{"id":11825,"date":"2023-02-15T19:30:11","date_gmt":"2023-02-15T11:30:11","guid":{"rendered":"https:\/\/www.modbus.cn\/?p=11825"},"modified":"2024-05-07T23:28:08","modified_gmt":"2024-05-07T15:28:08","slug":"ru-he-shi-yong-python-du-qu-modbus-she-bei-de-shu-ju","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/11825.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 Python \u8bfb\u53d6 Modbus \u8bbe\u5907\u7684\u6570\u636e\uff1f"},"content":{"rendered":"

\u8981\u4f7f\u7528 Python \u8bfb\u53d6 Modbus \u8bbe\u5907\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u7b2c\u4e09\u65b9 Modbus \u5e93\uff0c\u5982 pymodbus\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7 TCP \u6216 RTU \u7b49\u65b9\u5f0f\u8fde\u63a5\u5230 Modbus \u8bbe\u5907\uff0c\u7136\u540e\u8bfb\u53d6\u548c\u5199\u5165\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 pymodbus \u8bfb\u53d6 Modbus \u8bbe\u5907\u6570\u636e\u7684\u4e00\u4e9b\u57fa\u672c\u6b65\u9aa4\uff1a<\/p>\n\n\n\n

    \n
  1. \u5b89\u88c5 pymodbus \u5e93\uff1a\u53ef\u4ee5\u4f7f\u7528 pip \u547d\u4ee4\u5b89\u88c5 pymodbus \u5e93\uff0c\u4f8b\u5982\u5728\u547d\u4ee4\u884c\u4e2d\u8f93\u5165 pip install pymodbus\u3002<\/li>\n\n\n\n
  2. \u5bfc\u5165 ModbusClient \u7c7b\uff1a\u4f7f\u7528 from pymodbus.client.sync import ModbusTcpClient \u6216 from pymodbus.client.sync import ModbusSerialClient \u5bfc\u5165 ModbusClient \u7c7b\uff0c\u6839\u636e\u9700\u8981\u9009\u62e9 TCP \u6216 RTU \u8fde\u63a5\u65b9\u5f0f\u3002<\/li>\n\n\n\n
  3. \u521b\u5efa ModbusClient \u5bf9\u8c61\uff1a\u4f7f\u7528 ModbusClient \u7c7b\u521b\u5efa ModbusClient \u5bf9\u8c61\uff0c\u8bbe\u7f6e\u8fde\u63a5\u7684 IP \u5730\u5740\u3001\u7aef\u53e3\u53f7\u3001\u4e32\u53e3\u53f7\u7b49\u8fde\u63a5\u53c2\u6570\uff0c\u4f8b\u5982<\/li>\n<\/ol>\n\n\n\n
    client = ModbusTcpClient('192.168.1.10', port=502)\n<\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    \u6216\u8005<\/p>\n\n\n\n
    client = ModbusSerialClient(method='rtu', port='\/dev\/ttyUSB0', baudrate=9600, timeout=1)\n<\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    \u8bfb\u53d6\u6570\u636e\uff1a\u4f7f\u7528 ModbusClient \u5bf9\u8c61\u7684 read_coils\u3001read_discrete_inputs\u3001read_holding_registers \u6216 read_input_registers \u65b9\u6cd5\u8bfb\u53d6\u6570\u636e\uff0c\u6307\u5b9a\u8981\u8bfb\u53d6\u7684\u8d77\u59cb\u5730\u5740\u548c\u6570\u91cf\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    # \u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668\u5730\u5740\u4e3a 100\uff0c\u6570\u91cf\u4e3a 10 \u7684\u6570\u636e\nresult = client.read_holding_registers(100, 10)\n<\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
      \n
    1. \u5904\u7406\u6570\u636e\uff1a\u4ece\u8bfb\u53d6\u7684\u7ed3\u679c\u4e2d\u63d0\u53d6\u9700\u8981\u7684\u6570\u636e\uff0c\u4f8b\u5982\u4f7f\u7528 result.registers \u83b7\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u6570\u636e\uff0c\u7136\u540e\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u5904\u7406\u6216\u663e\u793a\u3002<\/li>\n\n\n\n
    2. \u5173\u95ed\u8fde\u63a5\uff1a\u4f7f\u7528 ModbusClient \u5bf9\u8c61\u7684 close \u65b9\u6cd5\u5173\u95ed\u4e0e Modbus \u8bbe\u5907\u7684\u8fde\u63a5\uff0c\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n
      client.close()\n<\/pre><\/div>\n\n\n\n
      <\/p>\n\n\n\n
      \u901a\u8fc7\u4f7f\u7528 pymodbus \u5e93\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8bfb\u53d6 Modbus \u8bbe\u5907\u7684\u6570\u636e\uff0c\u6839\u636e\u9700\u8981\u8fdb\u884c\u6570\u636e\u5904\u7406\u3001\u5b58\u50a8\u6216\u5c55\u793a\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u4f7f\u7528 pymodbus \u5e93\u65f6\uff0c\u8981\u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\uff0c\u8bbe\u7f6e\u5408\u9002\u7684\u8fde\u63a5\u65b9\u5f0f\u3001\u5730\u5740\u548c\u53c2\u6570\u7b49\uff0c\u4ee5\u4fdd\u8bc1\u901a\u4fe1\u7684\u5b89\u5168\u3001\u7a33\u5b9a\u548c\u53ef\u9760\u3002<\/p>\n\n\n\n
      <\/p>\n<\/span>","protected":false},"excerpt":{"rendered":"
      \u8981\u4f7f\u7528 Python \u8bfb\u53d6 Modbus \u8bbe\u5907\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f…<\/p>","protected":false},"author":1,"featured_media":27977,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[691],"tags":[1525,562,1139,1312,1526,1524],"class_list":["post-11825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modbus-code-base","tag-read","tag-562","tag-1139","tag-1312","tag-1526","tag-1524"],"_links":{"self":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/11825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/comments?post=11825"}],"version-history":[{"count":0,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/11825\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media\/27977"}],"wp:attachment":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media?parent=11825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/categories?post=11825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/tags?post=11825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}