About Bacnet - IDEC MICRO/I HG4G-CJT22 F-B Series User Manual

7 BACnet Communication

7.3 About BACnet

Applicable Standards
■
• ANSI/ASHRAE135-2012
Profile
■
BACnet/IP in the MICRO/I supports the following profile.
• B-ASC
Objects
■
Information, such as input and output values handled by BACnet devices that support BACnet/IP, are managed in
units called objects. Objects are separated into a number of different types, depend on the content of the object, and
these are called object types. The object types supported by BACnet/IP in the MICRO/I are as follows.
Basic input and output
BACnet device attributes
The MICRO/I can set objects for each object type. This information can be written to and read from BACnet devices
on the same BACnet/IP network. Regardless of the object type, the maximum number of objects that can be set is
256 in total.
For details on objects, refer to "7.8 Objects" on page 3-124.
Properties
■
Properties are the detailed information and attributes of each object.
For details on the properties of each object type, refer to "7.8 Objects" on page 3-124.
Services
■
Services are interfaces used to exchange information between BACnet devices. Services are classified into the client
side that initiates services and the server side that executes services.
The Services supported by BACnet/IP in the MICRO/I are as follows.
ReadProperty
ReadPropertyMultiple
WriteProperty
WritePropertyMultiple
SubscribeCOV
ConfirmedCOVNotification
UnconfirmedCOVNotification
Who-Is
I-Am
Who-Has
I-Have
DeviceCommunicationControl
For details on services, refer to the ANSI/ASHRAE 135-2012 (ISSN 1041-2336) standard or "BACnet Building
Automation Data Communication Protocol", a book published by the Institute of Electrical Installation
Engineers of Japan.
*1 The MICRO/I initiates services for other BACnet devices.
*2 The MICRO/I executes services that are initiated from other BACnet devices.
3-96
Object Type
Name
Analog Input Object
Analog Output Object
Analog Value Object
Binary Input Object
Binary Output Object
Binary Value Object
Device Object
Services
WindO/I-NV4 User's Manual
Abbreviation Identifier
AI
AO
AV
BI
BO
BV
DV
*1
Initiate Execute
NO
NO
NO
NO
NO
YES
YES
NO
YES
NO
YES
NO
0
1
2
3
4
5
8
*2
YES
YES
YES
YES
YES
NO
NO
YES
NO
YES
NO
YES