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communication module as soon as the change is received. The allowable range of characters for the
device object name will be 1 to 31 characters. If an empty string is read from the controller, the
following default name will be used:
Default device object name: MTE Chiller UCA - address*
*
Address
= the MAC Address
For example:
BACnet MS/TP:
MTE Chiller UCA-23
BACnet Ethernet and BACnet/IP:
MTE Chiller UCA-0-176-208-13-247-90
Note:
If the constructed name is longer than 31 characters, the numeric portion of the name will be
shortened to fit the name into the 31 character limit.
The Device Object name is also available to the network in the device. The property name is
“Object_Name” and property identifier is 77. Changing the device object name may affect the
operation of other BACnet devices on the network that have previously discovered the device. The
object name can be changed via the unit controller OITS panel.
Device Object Properties
The device object contains many other informative properties as shown in Table 1.
Items in bold are
configurable via the BACnet network.
Table 1. Magnitude Chiller Unit Controller Device Object Properties
Property
Identifier
Default Value
Data Type
Object Identifier
75
Device, variable BACnetObjectIdentifier
Object Name
77
Magnitude
Character String
Object Type
79
8
BACnetObjectType
System Status
112
BACnetDeviceStatus
Vendor Name
121
McQuay International
Character String
Vendor Identifier
120
3
Unsigned 16
Model Name
70
WME
Character String
Firmware Revision
44
variable
Character String
Application Software Version
12
variable
Character String
Location 58
Character
String
Description 28
McQuay
Chiller Character
String
Protocol Version
98
1
Unsigned
Protocol Revision
139
4
Unsigned
Protocol Services Supported
97
readProperty, readPropertyMultiple,
writeProperty,
writePropertyMultiple,
deviceCommunicationControl,
timeSynchronization, who-Has,
who-Is, utcTimeSyncronization,
BACnetServicesSupported
