# flow: System start-up

Flow at system start-up.

![](https://382916112-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LApFq98GrqkjGMpByJw%2F-LB47eT-NiS1IxnByVh0%2F-LB48BbzLGRYHP7VxdFA%2Fimage.png?alt=media\&token=2b8641c2-bd86-4132-8547-ad4260b6b9ba)

{% hint style="warning" %}
The E\_EVENT\_START\_UP event is only raised for user event processing functions.
{% endhint %}

* 始動: Starting
* システム内処理: In-system processing
* または: or
* ユーザ定義イベント処理関数: User defined event handling functions
* システムがメインループ動作を始める前に E\_EVENT\_START\_UP イベントが、ユーザ定義イベント処理関数に発生します。: The E\_EVENT\_START\_UP event is raised to the user-defined event processing function before the system starts the main loop operation.