Viconics VT8600 Series BACnet Integration Guide - Manual (Page 33)

VT8600 Series BACnet
®
Integration Manual 33
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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Note E1)
Status objects.
Object examples in this category: BV36 / Filter Alarm, AV21 / PI Heating Demand. All status objects are
writable.
The behaviour is similar to the behaviour described in NOTE E with the following exceptions and changes
When writing and binding to the priority array 1 to 3, the controller WILL store and archive to flash memory. As
soon as the new present value is received in priority array 1 to 3, the controller will use this new present value
in all its internal control logics and functions.
When writing and binding to the priority array 1 to 3, the controller internal control logics and functions ARE
bypassed the same way they are when writing to priority array 4 to 16. The controller will NOT operate with
its own present values, but will be forced to use the last write commands received on priority array 1 to 3 for
its built-in internal control logics and functions.
HOWEVER, since writing to priority array 1 to 3 will store the
value in flash memory, if a power reset occurs, the override type function will be maintained and the controller
will start to operate right away using the last value written to priority array 1 to 3.
The ONLY way to release the override due to the use of writing to priority array 1 to 3 is to send a write NULL
command to the proper priority array currently locking the controller. Only then will the controller start using the
relinquish default value and allow the user or installer to change values.