Viconics VTR7300 BACnet Integration Manual - Manual (Page 30)

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Tips and Things You Need To Know
 Each thermostat is delivered from the factory with the default MAC address set at 254. At this
value, the BACnet communication is NOT active and the device will not participate in the token
pass either. The local LED status for the communication adapter at this point is one short flash
only. To enable the BACnet communication, set the local MAC address configuration property
of the thermostat to any valid value from 0 to 127.
 After the initial configuration of your device and if your BAS allows you to remove objects, we
suggest that you remove all the configuration objects to prevent unnecessary polling of non
used objects and to help speed up the network.
 All configuration objects are available and accessible locally from the device itself using the
local configuration routine. Please refer to the Technical Manual LIT-VT7300-PIR-Exx for
details.
 In its default mode of operation, the device will automatically match its baud rate to the baud
rate of the network. Automatic baud rate detection will occur when the MS/TP communication
port is initialized (on power up). If the network speed is changed, the device will keep listening
at the previously detected speed for 10 minutes before resuming auto-bauding. Re-powering
the devices will force right away auto-bauding.
 Enumeration sets for System Mode MV16 depends on Sequence of Operation (MV15) value
upon device discovery. If required enumerations are not present, set MV15 to desired value
and rediscover MV16 object. Available enumeration will now reflect required configuration.
 Enumeration sets for MV16 depends on Fan Mode Sequence (MV58) value upon device
discovery. If required enumerations are not present, set MV58 to desired value and rediscover
MV16 object. Available enumeration will now reflect required configuration.
 Enumeration sets for MV26 and MV27 depend on Control Type (BV75) value and Pipe Number
(MV52) value upon device discovery. If required enumeration is not present, set BV75 and
MV52 to desired value and rediscover MV26 and BV27 object. Available enumeration will now
reflect required configuration.
 If the device should go off-line, the following binded thermostat parameters will be released:
 Room Temperature
 Outdoor Temperature
 Occupancy
 The BACnet Data Link layer has two key parameters: the device object name and the device
object ID. The device object name must be unique from any other BACnet device object name
on the BACnet network (i.e. not just the MS/TP sub-network). The device object ID must be
unique from any other BACnet device object ID on the entire BACnet network (i.e. not just the
MS/TP sub-network).
 To assign manually a Room Temperature (AV7) value, users must first enable the Override
mode in the Room Temp Override (BV8) object.
 To assign manually a Room Humidity (AV10) value, users must first enable the Override mode
in the Room Humidity Override (BV11) object.
 Device Name and Device ID properties are writable in Viconics’ device object. Both properties
can be renamed from any BACnet network management tool as long as the tool itself give
access to write to these properties.