ETC Unison Paradigm Central Control Server BACnet Interface Reference Guide - Manual (Page 38)

34 Unison Paradigm BACnet Interface Object Reference Guide
6 Paradigm LightDesigner Items
6.1 Expose On BACnet Property
Using Paradigm LightDesigner software, specific object instances may be removed from
exposition via the BACnet interface by setting the "Expose On BACnet" object property to
false. The Central Control Server node in LightDesigner provides this property for Error
objects and affects all errors reported within the Paradigm system.
This should be used to reduce the number of exposed objects, whether the intent is hiding
for security or for hiding uninteresting objects for simplicity or efficiency. All applicable
objects will be exposed by default; this property defaults to false or "No".
6.2 Send UCOVs Property
Subscription based change of value notifications are not supported in the Paradigm Central
Control Server. However, each object supported within the BACnet interface has a user
configurable property that governs whether an Unconfirmed Change of Value notification
should be sent when the object's present value changes.
This is configured using Paradigm LightDesigner software to modify the "Send BACnet
UCOVs" property for applicable objects. This property can be used to reduce the number
of automatic "change of value" (COV) responses that are sent to a client.
The property is unavailable if "Expose On BACnet" is set to false for that object instance.
All objects that are exposed via BACnet, except Channels, default to sending UCOVs and
have this property set to true or "Yes". Channel objects default this property to false or "No".
This default setting was selected as a courtesy, to mitigate sending a large number of
automatic level update responses from actions to Groups, Spaces, or Presets that can
affect the levels of multitudes of Channels simultaneously.
6.3 BACnet Device Instance Property
Paradigm LightDesigner provides the ability to change the device instance number that the
BACnet interface uses. In LightDesigner, selecting the Central Control Server in the
Browser tree will reveal a property in the Property Editor called “BACnet Device Instance”.
The default value is 108. This only needs to be changed if there will be device instance
number conflict with another device on the BACnet network.