Echelon SmartServer 2.2 - Manual (Page 297)

298 Using the SmartServer as Network Management Tool
/lonworks/types folder on the SmartServer flash disk.
This property is only displayed in Driver mode; it is not displayed in
General mode.
Poll Rate Displays the frequency in which the SmartServer polls the data point. The
recommended minimum poll rate is 30 seconds; the maximum poll rate is
1 second. The default poll rate is 0 seconds, which means polling is
disabled.
In Driver mode, you can change the poll rate. This property is not
displayed in General mode.
7. Click Submit to save any changes.
Using the Virtual Channel
The virtual channel is the SmartServer’s internal channel. It is used as a gateway for system
information that is used by the data points on the SmartServer. You can expand this channel, expand
the i.LON System (Internal) device, and then expand the VirtFB virtual functional block to show
data points representing the SmartServer’s free RAM, free disk space, CPU usage, battery level,
software version number, last received service pin message, and other information.
You can log the data points on the i.LON System (Internal) device, trigger alarms based on their
values, and so on. For example, you could add the FreeRAM data point to a data logger and record its
value once daily, or you could add this data point to alarm generator and trigger an alarm when it
reaches a certain constant value. In addition, you can create a data point with a constant value on this
channel and use this data point on other channels.
You can use the Overview – Data Points Web page to view or configure the names and poll rates of
the Virtual data points on the SmartServer’s internal systems device (i.LON System). To view the
Virtual data points with this Web page, follow these steps:
1. To rename or set the poll rates for the Virtual data points, click the Driver option at the top of the
navigation pane on the left side of the SmartServer Web interface.
2. Right-click the iLON System (Internal) device or the VirtFb functional block below it in the
SmartServer tree, point to Overview, and then select Data Points.