Echelon IzoT Commissioning Tool - Manual (Page 139)

To view the properties of a connection description, select the connection description from the Name
list. If you do make changes, click OK and IzoT Commissioning Tool then updates all network
variable members of the connection with the modified connection description
To create a new connection description, click New. The New Connection Description dialog box
opens.
Enter the name of the new connection description and select whether the currently displayed or default
attributes are used, and then click OK. Make any desired changes to the attributes of the new
connection description and then click OK. The new connection description will appear in the Name
list in the Network Variable Connection dialog box.
Using Automatic Connection Description Selection
You can use IzoT Commissioning Tool to automatically select the connection description for network
variable connections. IzoT Commissioning Tool will select the connection description that optimizes
network performance, while providing reliable message delivery and minimizing network resource
usage.
To support automatic connection description selection, the pre-defined connection descriptions include
smart connection descriptions (SCDs) . When a smart connection description is assigned to a
connection, IzoT Commissioning Tool automatically selects the appropriate SCD when a connection is
created or changed. IzoT Commissioning Tool determines the appropriate SCD based on the number
of target network variables, whether the target network variables are located on the same or different
subnet, and the availability of network variable aliases.
The following flow chart demonstrates the process IzoT Commissioning Tool uses to select the
appropriate SCD.
IzoT Commissioning Tool User’s Guide 123