Viconics VT8600 Series BACnet Integration Guide - Manual (Page 36)

VT8600 Series BACnet ® Integration Manual 36
Viconics Technologies Inc. | 9245 Langelier Blvd. | St.-Leonard | Quebec | Canada | H1P 3K9 | Tel: (514) 321-5660 | Fax: (514) 321-4150
028-0437-00 www.viconics.com | [email protected] March 2015
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TIPS AND THINGS YOU NEED TO KNOW
• Each controller 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 does not participate in the token pass. To enable the
BACnet ® communication, set the local MAC address configuration property of the controller to any valid value
from 0 to 127.
• After the initial configuration of your device and if your BAS allows you to remove objects, you should remove
all configuration objects to prevent unnecessary polling of unused objects and to help speed up the network.
• In default mode of operation, the device automatically matches its baud rate to the baud rate of the network.
Automatic baud rate detection occurs when the MS-TP communication port is initialized (on power up). If the
network speed is changed, the device keeps listening at the previously detected speed for 10 minutes before
resuming auto-baud. Re-powering the devices forces the auto-baud.
• If the device goes off line, the following bound controller parameters are 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
(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 (not just the MS-TP sub-network).
• Time synchronization can be made through a network even if the controller does not support the full date.
Therefore, the device cannot claim conformance to the DeviceManagement – TimeSynchronization - B (DM-
TS-B) service. The device object does not have the Local_Time or Local_Date properties.
• Device Name and Device ID properties are writable in Viconics device objects. Both properties can be
renamed from any BACnet ® network management tool as long as the tool itself gives access to write to these
properties.
TROUBLESHOOTING
Error / Fault Possible Cause Solution
Controller does not
come online
Two or more controllers have the same
MAC address. Modify each duplicate address to a unique
number.
The MS-TP network has too many
devices.
Do not exceed the maximum number of devices
and maximum length allowed by the EIA-485
specifications.
Too many devices were installed without
any repeaters.
Repeaters must be installed
The MS-TP cable runs are broken Locate the break and correct the wiring.
MS-TP connections at the module are
reversed
Respect polarity of the wires on a MS-TP network.
The controller does not have power Apply power to the controller