Delta CP2000 Series, User Manual

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Chapter 17 Introduction to BACnet │CP2000
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Chapter 17 Introduction to BACnet
1. About BACnet:
BACnet is an ASHRAE communication protocol for b uilding a utomation and c ontrol net works.
(ASHRAE: A merican S ociety of H eating, R efrigerating and Air-Conditioning E ngineers, Inc.).
CP2000’s BACnet is based on version 2004.
BACnet’s regulations are related to several kinds of physical layers’ interfaces. The physical layer built
inside CP2000 is achieved via MS/TP interface.
The BACnet of CP2000 supports a device type called B-ASC. B-ASC supports six types of services such
as DS-RP-B, DS-RPM-B, DS-WP-B, DM-DDB-B, DM-DOB-B and DM-DCC-B.
2. CP2000 BACnet-Object and Property:
In CP2000, BACnet supports 3 object types: Device, AnalogValue (AV) and BinaryValue (BV). In each
object type, we have the following table to show the Properties list:
Property ID
Object Type
Device Analog Value Binary Value
#4 ACTIVE TEXT V
#11 APDU_TIMEOUT V
#12 APPLICATION_SOFTWARE_VERSION V
#28 DESCRIPTION V V V
#30 DEVICE ADDRESS BINDING V V
#36 EVENT STATE V V
#44 FIRMWARE_REVISION V
#46 INACTIVE TEXT V
#62 MAX_APDU_LENGTH_ACCEPTED V
#63 MAX_INFO_FRAMES V
#64 MAX_MASTER V
#70 MODEL_NAME V
#73 NUMBER_OF_APDU_RETRIES V
#75 OBJECT_IDENTIFIER V *1 V V
#76 OBJECT_LIST V
#77 OBJECT_NAME V *1 V V
#79 OBJECT_TYPE V V V
#81 OUT OF SERVICE V V
#85 PRESENT VALUE V *2 V *2
#87 PRIORITY ARRAY V *3 V *3
#96 PROTOCOL_OBJECT_TYPES_SUPPORTED V
#97 PROTOCOL_SERVICES_SUPPORTED V
#98 PROTOCOL_VERSION V