> For the complete documentation index, see [llms.txt](https://wecon.gitbook.io/pistudio-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wecon.gitbook.io/pistudio-manual/8.-basic-functions/8.4-alarm.md).

# 8.4 Alarm

**Introduction**

PI software support bit alarm and word alarm, the alarm data and history can be saved in SD card, Udisk or HMI flash storage.

The alarm data can be display in HMI by \[[Alarm record display](/pistudio-manual/6.-object/6.3-charts/6.3.2-alarm-record-display.md)] object;