IntesisBox
®
ASCII
Server - BACnet
IP
User manual v10 r15 eng
Doc: IntesisBox ASCII Server - BACnet IP client v10 r15 eng.pdf
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IntesisBox
is a registered trademark of Intesis Software SLU
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tel
http://www.intesisbox.com
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Page 10 of 36
3. BACnet interface
3.1 Description
The BACnet systems are represented in the form of
Devices
holding
Objects
, normally every
physical device corresponds to a logical one. The
Objects
can be of different type depending
on their task: analog input, analog output, digital input, etc, up to 23 different types of
objects. Every
Object
has different properties, the one more commonly used, and the one
used to read and write values in the gateway is the
Present Value
property that indicates
the real value of the object. Every
Object
of the same type in a
Device
is identified with its
associated
Object Instance
.
These are the possible BACnet signals supported by the gateway:
Object Type
Property
Description
Analog Input
Present Value
Analog signal. i.e. Ambient temperature.
Analog Output
Present Value
Analog signal.
Analog Value
Present Value
Analog signal. i.e. Temperature set point value.
Binary Input
Present Value
Digital signal. i.e. ON/OFF status.
Binary Output
Present Value
Digital signal. i.e. ON/OFF command.
Binary Value
Present Value
Digital signal. i.e. ON/OFF status/command.
Multistate Input
Present Value
Multistate signal. i.e. Working mode status.
Multistate Output Present Value
Multistate signal.
Multistate Value
Present Value
Multistate signal. i.e. Working mode command.
Multistate
signals represent integer values, the same than binary ones but with more than 2
possible statuses.
Input
signals are read only signals.
Every signal is identified with its associated
Device
+
Object Type
+
Object Instance
.
The gateway simulates a virtual BACnet device inside the BACnet system acting as one
more device of the BACnet system. The communication with the rest of the BACnet devices
is done via the Ethernet port of the gateway which implements the BACnet IP protocol.