# Limits Configuration

{% hint style="info" %}
You will find the limit configuration files at `[Install Location]\50_LTT_SW\LTT Limit Files`.
{% endhint %}

```xml
<LttLimitConfig DutType="Type1">
  <Signal name="U_24V">
    <Limit name="default" id="1000" val1="-1" val2="1" />
    <Limit name="active" id="1001" val1="12" val2="12.5" />
    <Limit name="over" id="1002" val1="15.8" val2="16.5" />
    <Limit name="under" id="1003" val1="8.7" val2="9.2" />
  </Signal>
  <Signal name="U_Kl30">
    <Limit name="default" id="1010" val1="0" val2="90" />
  </Signal>
  <Signal name="U_Ubatt">
    <Limit name="default" id="1020" val1="0" val2="90" />
  </Signal>
</LttLimitConfig>
```

In the [F5 - limit configuration](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f5limitconfiguration.md) dialog you can configure limits for every signal defined in the [signals definition](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f3projectwizard/signalsdefinition.md) dialog. Limits are defined per [DUT type](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f3projectwizard/duttypesconfiguration.md), so you can have different limits for the same signal in different DUT types. For that reason you will find in the above folder different limits configuration files, one for each DUT type. The files will have a file name with the following pattern: `limits_for_[DUT type name].xml`.

{% hint style="info" %}
Limit configuration files are only present if you have actually configured some limits for a DUT type. After a fresh installation the LTT Limit Files folder is empty.
{% endhint %}

{% hint style="warning" %}
All limits are stored in configuration database, but are also exported to XML. The Action Logs mechanism use those files as a form of **documentation** of the parameter changes over time. The exported limit configuration files are also used to **transfer** limits from one LTT to another ([more info](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f5limitconfiguration.md)).
{% endhint %}

{% hint style="warning" %}
Do not make any changes in this files as they will be overwritten by the GUI.
{% endhint %}


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