{
  "message_name": "CCUStateFbMsg",
  "protocol_id": "0x0041",
  "endianness": "little",
  "fields": [
    {
      "name": "start1",
      "offset": 0,
      "length": 1,
      "type": "uint8",
      "value": "0x20",
      "description": "起始字节1"
    },
    {
      "name": "start2",
      "offset": 1,
      "length": 1,
      "type": "uint8",
      "value": "0x20",
      "description": "起始字节2"
    },
    {
      "name": "id",
      "offset": 2,
      "length": 2,
      "type": "uint16",
      "value": "0x0041",
      "description": "消息ID"
    },
    {
      "name": "length",
      "offset": 4,
      "length": 2,
      "type": "uint16",
      "dynamic": true,
      "description": "数据长度（自动计算）"
    },
    {
      "name": "currentWorkCondition",
      "offset": 6,
      "length": 1,
      "type": "uint8",
      "enum": {"0x00":"待机","0x01":"运行","0x02":"故障"},
      "description": "当前工作状态"
    },
    {
      "name": "fcuState",
      "offset": 7,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "燃料电池状态"
    },
    {
      "name": "fcuFaultLeve",
      "offset": 8,
      "length": 1,
      "type": "uint8",
      "description": "故障等级"
    },
    {
      "name": "powerLimit",
      "offset": 9,
      "length": 4,
      "type": "float32",
      "unit": "kW",
      "description": "功率限制值"
    },
    {
      "name": "totalPowerGeneration",
      "offset": 13,
      "length": 4,
      "type": "float32",
      "unit": "kWh",
      "description": "总发电量"
    },
    {
      "name": "ch4o",
      "offset": 17,
      "length": 4,
      "type": "float32",
      "unit": "ppm",
      "description": "甲醇浓度"
    },
    {
      "name": "o2",
      "offset": 21,
      "length": 4,
      "type": "float32",
      "unit": "%",
      "description": "氧气浓度"
    },
    {
      "name": "fcuVoltage",
      "offset": 25,
      "length": 4,
      "type": "float32",
      "unit": "V",
      "description": "燃料电池电压"
    },
    {
      "name": "fcuCurrent",
      "offset": 29,
      "length": 4,
      "type": "float32",
      "unit": "A",
      "description": "燃料电池电流"
    },
    {
      "name": "o2Level",
      "offset": 33,
      "length": 4,
      "type": "float32",
      "unit": "%",
      "description": "氧气含量"
    },
    {
      "name": "placeholder1",
      "offset": 37,
      "length": 4,
      "type": "float32",
      "description": "预留字段1"
    },
    {
      "name": "exchangerTemperature",
      "offset": 41,
      "length": 4,
      "type": "float32",
      "unit": "°C",
      "description": "换热器温度"
    },
    {
      "name": "fcuOutPower",
      "offset": 45,
      "length": 4,
      "type": "float32",
      "unit": "kW",
      "description": "燃料电池输出功率"
    },
    {
      "name": "fcuOutIns",
      "offset": 49,
      "length": 4,
      "type": "float32",
      "unit": "kΩ",
      "description": "绝缘电阻"
    },
    {
      "name": "fcuVoltageIns",
      "offset": 53,
      "length": 4,
      "type": "float32",
      "unit": "V",
      "description": "绝缘监测电压"
    },
    {
      "name": "fcuVoltagePower",
      "offset": 57,
      "length": 4,
      "type": "float32",
      "unit": "V",
      "description": "功率电压"
    },
    {
      "name": "fcuCurrentIns",
      "offset": 61,
      "length": 4,
      "type": "float32",
      "unit": "A",
      "description": "绝缘监测电流"
    },
    {
      "name": "fcuCurrentPower",
      "offset": 65,
      "length": 4,
      "type": "float32",
      "unit": "A",
      "description": "功率电流"
    },
    {
      "name": "h2Concentration1",
      "offset": 69,
      "length": 4,
      "type": "float32",
      "unit": "ppm",
      "description": "氢气浓度1"
    },
    {
      "name": "h2Concentration2",
      "offset": 73,
      "length": 4,
      "type": "float32",
      "unit": "ppm",
      "description": "氢气浓度2"
    },
    {
      "name": "o2Concentration1",
      "offset": 77,
      "length": 4,
      "type": "float32",
      "unit": "%",
      "description": "氧气浓度1"
    },
    {
      "name": "o2Concentration2",
      "offset": 81,
      "length": 4,
      "type": "float32",
      "unit": "%",
      "description": "氧气浓度2"
    },
    {
      "name": "ch4oConcentration1",
      "offset": 85,
      "length": 4,
      "type": "float32",
      "unit": "ppm",
      "description": "甲醇浓度1"
    },
    {
      "name": "ch4oConcentration2",
      "offset": 89,
      "length": 4,
      "type": "float32",
      "unit": "ppm",
      "description": "甲醇浓度2"
    },
    {
      "name": "backpressure1",
      "offset": 93,
      "length": 4,
      "type": "float32",
      "unit": "kPa",
      "description": "背压1"
    },
    {
      "name": "backpressure2",
      "offset": 97,
      "length": 4,
      "type": "float32",
      "unit": "kPa",
      "description": "背压2"
    },
    {
      "name": "flameDetection",
      "offset": 101,
      "length": 1,
      "type": "uint8",
      "description": "火焰检测状态"
    },
    {
      "name": "fcuGZ_1L",
      "offset": 102,
      "length": 1,
      "type": "uint8",
      "description": "故障字1低字节"
    },
    {
      "name": "fcuGZ_1H",
      "offset": 103,
      "length": 1,
      "type": "uint8",
      "description": "故障字1高字节"
    },
    {
      "name": "fcuGZ_2L",
      "offset": 104,
      "length": 1,
      "type": "uint8",
      "description": "故障字2低字节"
    },
    {
      "name": "fcuGZ_2H",
      "offset": 105,
      "length": 1,
      "type": "uint8",
      "description": "故障字2高字节"
    },
    {
      "name": "fcuGZ_3L",
      "offset": 106,
      "length": 1,
      "type": "uint8",
      "description": "故障字3低字节"
    },
    {
      "name": "fcuGZ_3H",
      "offset": 107,
      "length": 1,
      "type": "uint8",
      "description": "故障字3高字节"
    },
    {
      "name": "insPosRelayState",
      "offset": 108,
      "length": 1,
      "type": "uint8",
      "description": "绝缘正极继电器状态"
    },
    {
      "name": "insNegRelayState",
      "offset": 109,
      "length": 1,
      "type": "uint8",
      "description": "绝缘负极继电器状态"
    },
    {
      "name": "powerPosRelayState",
      "offset": 110,
      "length": 1,
      "type": "uint8",
      "description": "功率正极继电器状态"
    },
    {
      "name": "powerNegRelayState",
      "offset": 111,
      "length": 1,
      "type": "uint8",
      "description": "功率负极继电器状态"
    },
    {
      "name": "insBatLimit",
      "offset": 112,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "绝缘电池电流限制"
    },
    {
      "name": "powerBatLimit",
      "offset": 114,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "功率电池电流限制"
    },
    {
      "name": "insBatSoc",
      "offset": 116,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "绝缘电池SOC"
    },
    {
      "name": "powerBatSoc",
      "offset": 117,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "功率电池SOC"
    },
    {
      "name": "insBatTotalElectricity",
      "offset": 118,
      "length": 2,
      "type": "uint16",
      "unit": "kWh",
      "description": "绝缘电池总电量"
    },
    {
      "name": "powerBatTotalElectricity",
      "offset": 120,
      "length": 2,
      "type": "uint16",
      "unit": "kWh",
      "description": "功率电池总电量"
    },
    {
      "name": "insBatCurrentElectricity",
      "offset": 122,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "绝缘电池当前电流"
    },
    {
      "name": "powerBatCurrentElectricity",
      "offset": 124,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "功率电池当前电流"
    },
    {
      "name": "insChargeState",
      "offset": 126,
      "length": 1,
      "type": "uint8",
      "description": "绝缘电池充电状态"
    },
    {
      "name": "powerChargeState",
      "offset": 127,
      "length": 1,
      "type": "uint8",
      "description": "功率电池充电状态"
    },
    {
      "name": "insLinkVoltage",
      "offset": 128,
      "length": 2,
      "type": "uint16",
      "unit": "V",
      "description": "绝缘链路电压"
    },
    {
      "name": "insPackVoltage",
      "offset": 130,
      "length": 2,
      "type": "uint16",
      "unit": "V",
      "description": "绝缘电池组电压"
    },
    {
      "name": "insCurrent",
      "offset": 132,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "绝缘电流"
    },
    {
      "name": "insPosInsulationResistance",
      "offset": 134,
      "length": 2,
      "type": "uint16",
      "unit": "kΩ",
      "description": "正极绝缘电阻"
    },
    {
      "name": "insNegInsulationResistance",
      "offset": 136,
      "length": 2,
      "type": "uint16",
      "unit": "kΩ",
      "description": "负极绝缘电阻"
    },
    {
      "name": "powerLinkVoltage",
      "offset": 138,
      "length": 2,
      "type": "uint16",
      "unit": "V",
      "description": "功率链路电压"
    },
    {
      "name": "powerPackVoltage",
      "offset": 140,
      "length": 2,
      "type": "uint16",
      "unit": "V",
      "description": "功率电池组电压"
    },
    {
      "name": "powerCurrent",
      "offset": 142,
      "length": 2,
      "type": "uint16",
      "unit": "A",
      "description": "功率电流"
    },
    {
      "name": "powerPosInsulationResistance",
      "offset": 144,
      "length": 2,
      "type": "uint16",
      "unit": "kΩ",
      "description": "功率正极绝缘电阻"
    },
    {
      "name": "powerNegInsulationResistance",
      "offset": 146,
      "length": 2,
      "type": "uint16",
      "unit": "kΩ",
      "description": "功率负极绝缘电阻"
    },
    {
      "name": "insEmergencyStatusWord",
      "offset": 148,
      "length": 1,
      "type": "uint8",
      "description": "绝缘紧急状态字"
    },
    {
      "name": "powerEmergencyStatusWord",
      "offset": 149,
      "length": 1,
      "type": "uint8",
      "description": "功率紧急状态字"
    },
    {
      "name": "insAlarmIdentificationWord",
      "offset": 150,
      "length": 1,
      "type": "uint8",
      "description": "绝缘报警标识字"
    },
    {
      "name": "powerAlarmIdentificationWord",
      "offset": 151,
      "length": 1,
      "type": "uint8",
      "description": "功率报警标识字"
    },
    {
      "name": "insCurrentSocHold1",
      "offset": 152,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "绝缘电流SOC保持1"
    },
    {
      "name": "insCurrentSocHold2",
      "offset": 153,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "绝缘电流SOC保持2"
    },
    {
      "name": "insCurrentSocHold3",
      "offset": 154,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "绝缘电流SOC保持3"
    },
    {
      "name": "fcuCurrentToInsLimit1",
      "offset": 155,
      "length": 1,
      "type": "uint8",
      "unit": "A",
      "description": "FCU到绝缘限制1"
    },
    {
      "name": "fcuCurrentToinsLimit2",
      "offset": 156,
      "length": 1,
      "type": "uint8",
      "unit": "A",
      "description": "FCU到绝缘限制2"
    },
    {
      "name": "powerCurrentSocHold1",
      "offset": 157,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "功率电流SOC保持1"
    },
    {
      "name": "powerCurrentSocHold2",
      "offset": 158,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "功率电流SOC保持2"
    },
    {
      "name": "powerCurrentSocHold3",
      "offset": 159,
      "length": 1,
      "type": "uint8",
      "unit": "%",
      "description": "功率电流SOC保持3"
    },
    {
      "name": "powerCurrentToInsLimit1",
      "offset": 160,
      "length": 1,
      "type": "uint8",
      "unit": "A",
      "description": "功率到绝缘限制1"
    },
    {
      "name": "powerCurrentToinsLimit2",
      "offset": 161,
      "length": 1,
      "type": "uint8",
      "unit": "A",
      "description": "功率到绝缘限制2"
    },
    {
      "name": "placeholder2",
      "offset": 162,
      "length": 4,
      "type": "float32",
      "description": "预留字段2"
    },
    {
      "name": "placeholder3",
      "offset": 166,
      "length": 4,
      "type": "float32",
      "description": "预留字段3"
    },
    {
      "name": "placeholder4",
      "offset": 170,
      "length": 4,
      "type": "float32",
      "description": "预留字段4"
    },
    {
      "name": "placeholder5",
      "offset": 174,
      "length": 4,
      "type": "float32",
      "description": "预留字段5"
    },
    {
      "name": "checkCode",
      "offset": 178,
      "length": 4,
      "type": "uint32",
      "description": "校验码（从start1到placeholder5的字节累加和）"
    }
  ],
  "metadata": {
    "total_length": 182,
    "data_section_start": 6,
    "data_section_end": 178,
    "checksum_range": "0-178",
    "float_precision": "IEEE-754单精度",
    "reserved_fields": [
      "placeholder1",
      "placeholder2",
      "placeholder3",
      "placeholder4",
      "placeholder5"
    ]
  }
}