Viconics VT8600 Series BACnet Integration Guide - Manual (Page 37)

VT8600 Series BACnet
®
Integration Manual 37
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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APPENDIX A
Important notice to all Niagara integrators
For all intents and purposes, BO95 / BO4 High Speed Fan Output is used on all examples below.
Where BO95 is the object BACnet instance and BO 4 is the terminal location on the controller
Using native Niagara Set Command for an object
Typically when BACnet device objects are discovered under a BACnet device in Niagara, objects are proxied
under the local server database using standard Niagara device and object management processes.
As such using the simple add object command, Niagara creates local proxy extensions of certain of the object
properties including the BACnet object present value.
When using the “set” command under Niagara, the local server issues a BACnet write command to the con-
troller
without specifying any specific priority array from 1 to 16. As per the BACnet standard, when a control-
ler receives an unspecified write command, the controller automatically assigns it to priority array level 16.