DGIOT玩转Modbus实战教程——05功能码控制下发

袁旭聪

2022年9月27日 / 实战教程, 技术文章

[小迪导读]：
本教程在掌握基础modbusRTU标准协议概念和业务流程之后，通过真实的支持ModbusRTU标准协议的设备和DTU来进行实战演练。

系统需要使用一个测试软件：

网络调试助手

系统架构逻辑图如下，包括设备模拟，通道通信，模型设置，应用显示部分

操作步骤：

1.创建产品

产品信息

产品添加通道后需对通道进行重启

2.创建物模型

物模型代码

{
    "properties": [
        {
            "accessMode": "rw",
            "dataForm": {
                "address": "0X10",
                "afn": "",
                "byteType": "",
                "bytelen": "",
                "collection": "%s",
                "control": "%d",
                "countcollection": "%s",
                "countround": "all",
                "countstrategy": 20,
                "da": "",
                "data": "null",
                "dt": "",
                "iscount": "0",
                "offset": 0,
                "operatetype": "readCoils",
                "order": 0,
                "originaltype": "short16_AB",
                "protocol": "MODBUSRTU",
                "rate": 1,
                "round": "all",
                "slaveid": "0X10",
                "strategy": "主动上报"
            },
            "dataSource": {
                "": [],
                "_dlinkindex": 1,
                "address": "0X00",
                "operatetype": "writeCoil",
                "originaltype": "bit",
                "registersnumber": "1",
                "slaveid": "0X01"
            },
            "dataType": {
                "das": [],
                "specs": {
                    "1": "开",
                    "10": "关"
                },
                "type": "enum"
            },
            "devicetype": "开关控制器",
            "identifier": "switch",
            "isaccumulate": false,
            "isshow": false,
            "isstorage": false,
            "moduleType": "properties",
            "name": "开关",
            "required": true,
            "updateAt": "1664250089119",
            "index": 0
        }
    ]
}

3.添加低代码

低代码模板:

{
  "type": "form",
  "body": [
    {
      "id": "u:52fbc3355570",
      "mode": "inline",
      "name": "switch",
      "type": "switch",
      "label": "开关机",
      "onText": "开",
      "option": "",
      "offText": "关",
      "trueValue": 1,
      "falseValue": 10,
      "validateApi": {
        "url": "iotapi/classes/Device/parse_objectid",
        "method": "put",
        "headers": {
          "store": "localStorage",
          "dgiotReplace": "parse_objectid"
        },
        "requestAdaptor": "return {\r\n  ...api,\r\n  data:{\r\n    profile:{\r\n      switch:api.data.switch    \r\n      }\r\n  }\r\n}"
      },
      "optionAtLeft": false,
      "submitOnChange": true
    }
  ],
  "title": "开关机控制器",
  "trueValue": true,
  "falseValue": false,
  "submitText": "",
  "optionAtLeft": false
}