Echelon IzoT Commissioning Tool - Manual (Page 185)

When you enable monitoring on a connection, the network variable values are continuously polled.
The default poll interval is 1 second. To change the default poll interval, click Add-ins, point to
LonWorks Network, and then click Network Properties. Click the Timing tab, set the default poll
rate, and then click OK. Excessive polling can create heavy network traffic and consequently degrade
network performance.
Monitoring connections can interfere with the successful completion of network installation and
maintenance operations such as commissioning devices; therefore, IzoT Commissioning Tool disables
monitoring during these types of operations.
For more information on monitoring network variable values, see Monitoring Network Variables in
this chapter.
Displaying a Network Variable Value
You can display the value of a network variable without monitoring a connection as described in the
previous section. The network variable must be attached to a connector or reference connection
SmartShape, but the connector or reference connection SmartShape does not have to be connected to
any other network variables. To display the value of a network variable with a connector SmartShape,
right-click the connector SmartShape and then click Get Input Value or Get Output Value on the
shortcut menu. For a reference connection SmartShape, right-click the reference connection
SmartShape and then click Get Value on the shortcut menu. The network variable value on the side of
the connection you selected opens on the connector SmartShape.
By default, the network variable value is displayed for 15 seconds. You can change the display
duration by clicking Add-ins, clicking IzoT Commissioning Tool, clicking IzoT Commissioning
Tool Options, and then selecting NV Browser/ Monitoring from the Options Category list.
IzoT Commissioning Tool User’s Guide 169