本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

診斷故障碼使用案例

下列使用案例假設 DTC_QUERY函數已在示範指令碼中定義。

定期擷取

以設定的間隔擷取 DTC 集合。

下列範例是具有針對所有 ECUs Vehicle.DTC_INFO 的狀態遮罩之所有 DTCs 定期擷取訊號的行銷活動。為 收集的資料有條件Vehicle.DTC_INFO。

{
  "compression": "SNAPPY",
  "spoolingMode": "TO_DISK",
  "signalsToFetch": [
    {
      "fullyQualifiedName": "Vehicle.ECU1.DTC_INFO",
      "signalFetchConfig": {
        "timeBased": {
        // The FleetWise Edge Agent will query the UDS module for all DTCs every five seconds.
          "executionFrequencyMs": 5000
        }
      },
      "actions": [
      // Every five seconds, this action is called and its output is stored in the
      // signal history buffer of Vehicle.DTC_INFO
        "custom_function(\"DTC_QUERY\", -1, 2, -1)"
      ]
    }
  ],
  "signalsToCollect": [
    {
      "name": "Vehicle.ECU1.DTC_INFO"
    }
  ],
  "collectionScheme": {
    "conditionBasedCollectionScheme": {
      "conditionLanguageVersion": 1,
      // Whenever a new DTC is filled into the signal, the data is ingested.
      "expression": "!isNull($variable.`Vehicle.ECU1.DTC_INFO`)",
      "minimumTriggerIntervalMs": 1000,
      // Make sure that data is ingested only when there are new DTCs.
      "triggerMode": "RISING_EDGE"
    }
  },
  "dataDestinationConfigs": [
    {
      "s3Config": 
        {
          "bucketArn": "bucket-arn",
          "dataFormat": "PARQUET",
          "prefix": "campaign-name",
          "storageCompressionFormat": "GZIP"
        }
    }
  ]
}

條件驅動型擷取

符合條件時擷取 DTC 集合。例如，當 CAN 訊號為 時Vehicle.Ignition == 1，請擷取和上傳 DTC 資料。

下列範例行銷活動具有 的條件驅動訊號擷取Vehicle.ECU1.DTC_INFO，以檢查 DTC ("AAA123") 是否正在等待recordNumber 1 用於 ECU-1。此行銷活動具有以時間為基礎的資料收集和上傳。

{
  "compression": "SNAPPY",
  "spoolingMode": "TO_DISK",
  "signalsToFetch": [
    {
      "fullyQualifiedName": "Vehicle.ECU1.DTC_INFO",
      "signalFetchConfig": {
        "conditionBased": {
        // The action will only run when the ignition is on.
          "conditionExpression": "$variable.`Vehicle.Ignition` == 1",
          "triggerMode": "ALWAYS"
        }
      },
      // The UDS module is only requested for the specific ECU address and the specific DTC Number/Status.
      "actions": ["custom_function(\"DTC_QUERY\", 1, 2, 8, \"0xAAA123\")"]
    }
  ],
  "signalsToCollect": [
    {
      "name": "Vehicle.ECU1.DTC_INFO"
    },
    {
      "name": "Vehicle.Ignition"
    }
  ],
  "collectionScheme": {
    "timeBasedCollectionScheme": {
      "periodMs": 10000
    }
  },
  "dataDestinationConfigs": [
    {
      "s3Config": 
        {
          "bucketArn": "bucket-arn",
          "dataFormat": "PARQUET",
          "prefix": "campaign-name",
          "storageCompressionFormat": "GZIP"
        }
    }
  ]
}

隨需擷取

擷取機群的特定 DTC。

對於隨需使用案例，您可以使用與定期擷取中定義的相同行銷活動。使用 AWS IoT FleetWise 主控台或執行下列 CLI 命令，在行銷活動部署後立即暫停行銷活動，即可實現隨需效果。

aws iotfleetwise update-campaign \
    --name campaign-name \
    --action APPROVE

然後，在 DTC 資料送達後暫停行銷活動。

aws iotfleetwise update-campaign \
    --name campaign-name \
    --action SUSPEND

您可以再次繼續行銷活動以進行 DTC 資料擷取。

aws iotfleetwise update-campaign \
    --name campaign-name \
    --action RESUME