> For the complete documentation index, see [llms.txt](https://mwm5.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mwm5.twelite.info/1.0-2/references/parser/twefmt/packet-types/twepacketpal/paldatainfo.md).

# PalDataInfo

PAL/CUEのパケットがどのような原因で送信されたかなどを付加する補助情報です。例えばタイマー送信かセンサーの発報によるものかなどの情報が含まれます。[`TwePacketPal`](/1.0-2/references/parser/twefmt/packet-types/twepacketpal.md)が本構造体を継承しており単独では使用しません。

```cpp
struct PalDataInfo {
  E_SNSCD e_data_source;
  E_CAUSE e_data_cause;
};
```

| メンバー名           | 内容                                                                                                       |
| --------------- | -------------------------------------------------------------------------------------------------------- |
| `e_data_source` | パケット送信を行う原因となるセンサーやタイマー。                                                                                 |
| `e_data_cause`  | `e_data_source`の状態が変化した場合に送信されたからといった要因を示す。`E_CAUSE`に定義され、例えば「`VALUE_OVER_LIMIT`センサー値が閾値以上」といった要因が定義される。 |


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