====== Devices dedicated to the IB-System ======

The **IB-System** was created with the integration of devices from various manufacturers in mind.

However, it is possible to use devices dedicated to the **IB-System**. The use of such devices has a number of advantages described in the further part of the documentation. 

This documentation aims to indicate how to design devices to be dedicated to the **IB-System**.

===== MODBUS RTU Devices =====

For devices to be compatible with the **IB-System**, the first ten addresses of the **Holding Registers** type should contain:

  * Address **0** – a numerical hardware identifier of the device. Unique within the database of devices dedicated to the **IB-System**.
  * Address  **1** – a numerical software identifier. Unique within a given hardware identifier of the device.
  * Address **2** – a numerical software version identifier. Unique within a given hardware identifier of the device and software identifier.
  * Address **3, 4, 5, 6** – a unique device identifier (serial number).
  * Address **7** – setting this register to the value of **1** causes the device to restore factory settings.
  * Address **8** – setting this register to the value of **1** causes the device to restart.
  * Address **9** – the device's MODBUS address.

A MODBUS RTU device dedicated to the **IB-System** allows:

  * automatic detection and identification of the device in the **ibvunit** program
  * utomatic downloading of the configuration file in the **ibvunit** program

All unique identifiers (hardware, software, software version) will be assigned free of charge at the stage of registering the device manufacturer on www.ibsystem.org.