# DR-Fan ERV Modbus Protocol

***Settings (VSP Setting)***

<figure><img src="/files/TxqQkByIAYVb0jZZNZo7" alt=""><figcaption><p>Settings (VSP Setting)</p></figcaption></figure>

***Settings (ID Setting)***

▪ Assign ID by using UP/DOWN buttons when entering ID in VSP Setting mode.&#x20;

▪ After assigning ID, make sure to click “Select” button to save the ID.&#x20;

▪ If ID is duplicate, collision occurs, disabling normal operation.&#x20;

▪ Reenter to check ID set for the equipment.

***Modbus Protocol***

<figure><img src="/files/p4JkOOkk5I5Y9ssjLBGO" alt=""><figcaption><p>Status Request</p></figcaption></figure>

<figure><img src="/files/26gpYwhGAreTUBMkmtK6" alt=""><figcaption><p>Control Request</p></figcaption></figure>


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