> For the complete documentation index, see [llms.txt](https://wiki.inels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.inels.com/inels-bus/inels-design-manager-idm3/ntp-time-synchronization-settings.md).

# NTP (Time Synchronization) Settings

The **miniCU** supports automatic time synchronization using **NTP (Network Time Protocol)**.\
Correct system time is important for:

* Scheduled automations (time scenes, logic)
* Logs and event timestamps
* Time-based reporting
* Reliable integration with external systems

NTP settings are configured in **iDM (iNELS Design Manager)** inside the CU configuration section.

### Where to Configure NTP in iDM

1. Open **iDM**
2. Connect to the target **miniCU**
3. Navigate to:

**CU Configuration → Time Settings**

In this page, you will find a field to configure **NTP server**.

<figure><img src="/files/1IDOa3NfCjh1INrIaYDe" alt=""><figcaption></figcaption></figure>

**Only IP address format is supported** in the NTP server field.

* The miniCU NTP input supports **numeric IP address only**
* DNS strings / hostnames are **not supported**

&#x20;`195.113.144.201`\
&#x20;`81.0.246.244`

#### Not Supported Example

❌ `pool.ntp.org`\
❌ `time.google.com`\
❌ `0.pool.ntp.org`

> ⚠️ **Do not use string-based NTP servers** like `pool.ntp.org`.\
> The miniCU will not resolve the DNS name and time sync will fail.


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