Explore new building automation possibilities with the BACnet protocol

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15/1/20 Unipi controllers now support the BACnet - a communication standard designed specifically for building automation

What is BACnet? 

BACnet (Building Automation Control Network) is a standard for communication between building automation devices. Its concept is characterized by understandability, notable ruggedness and easy implementation into simple (eg. less expensive) devices.

BACnet communication uses the master/slave model and as such is very similar to the Modbus protocol. In contrast to Modbus however, BACnet does not require to know the device definition before accessing it, as the device itself will provide a complete list of its I/Os, their names and data types. This model makes adding new devices into already existing networks much easier.

BACnet can be operated on various physical interfaces, including a regular computer network, RS485 serial line or Zigbee wireless "mesh" networks. As such, BACnet thus represents a versatile modern protocol.

BACnet on Unipi products

BACnet is now supported also by Unipi controllers using the Mervis system. From the 2.3.0 release of the Mervis IDE development environment, users have the option to set up a BACnet/IP server running on the PLC, or to configure the PLC as a BACnet/IP client device.

On this link, you can find a comprehensive tutorial including a showcase project of using BACnet to connect a Weintek HMI panel to an Unipi PLC. For a brief introduction into BACnet and other information, please visit this article on the Unipi Knowledge Base

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