Bacnet Interface; General Description; Bacnet Client; Description - HMS Networks Intesis IN700-485 Series User Manual

BACnet Interface

8. BACnet Interface

8.1. General Description

BACnet is a solid standard with many detailed concepts, but for this manual purposes, we will focus on the two
most fundamental concepts:
• BACnet client, which is the device that sends service requests to the server.
• BACnet server, which is the device that performs the requested service and reports the result back to the
client.
BACnet server devices are represented in the form of devices holding objects. Usually, every physical device
corresponds to a logical one. The objects can be of different types depending on the data and functionality they
represent: Analog input, Analog output, Digital input, etc.
NOTE
• Output objects are objects meant to be written in the direction BACnet network to the device.
• Input objects are meant to offer status information of the BACnet device.
• Value objects are bidirectional.
Every object has different properties. The most meaningful one is the Present_Value property, which indicates
the real value of the object. Also, the gateway uses this property to read and write values. Every object of the
same type in a device is identified with its associated object instance.

8.2. BACnet Client

8.3. Description

The gateway implements a single BACnet object of its own: its BACnet Device Object, which contains its BACnet
Device Identifier and basic properties of the gateway as a BACnet device (name, firmware version, etc.).
NOTICE
When acting as a client device, the Intesis gateway is classified under the device profile of a BACnet
Application Specific Controller (B-ASC). For further details, check out the product website for the
BACnet client PIC statements.
The gateway emulates a client device in the BACnet system.
USER MANUAL Version 1.0
IN700-485 Series
Page 9 of 36