Product manual

TAC Xenta Server – Gateway, Technical Manual 10 Using Signals
Schneider Electric Buildings AB, June 2011 81 (184)
04-00124-06-en
10 Using Signals
10.1 Defining SNVTs and Controller Objects
Public signals on the network are always polled when they are used in
the Xenta 913. SNVTs from devices on the network can also be used for
display in values pages and transferring to other devices. These are also
polled.
SNVTs can be added to the Xenta 913 to make them available on the
LonWorks network. Using LonMaker, you can bind these to other
devices on the network. The SNVTs can also be made available in
Vista, for example, when the Xenta 913 is installed as a LonWorks
device in a classic network.
10.1.1 Adding SNVTs in the TAC Xenta 913
Beneath the TAC_Xenta_913 object in the network pane in XBuilder is
a SNVTs folder. The SNVTs folder contains two objects: ConfigProp-
erties and LonMarkObjects. The latter always contains a Controller
Object (Node_Object_0) with two network variables; SNVT_ObjReq
and SNVT_ObjState.
Additional Controller Objects and SNVTs can be added in the SNVTs
folder of the Xenta 913. A Controller Object is like a container for
SNVTs, that is, it you can create several SNVTs within each Controller
Object.
In each device on a LonWorks network there is an .xif file that contains
information about the SNVTs in the device. Adding SNVTs to the
device requires that you create a new .xif file. Using the information in
the .xif files you can bind the SNVTs using LonMaker.