Echelon SmartServer 2.2 - Manual (Page 190)

SmartServer 2.2 User’s Guide 191
2. Configure the following properties:
SOAP Timeout Set the maximum period of time (in seconds) that the SmartServer waits for
a response to a SOAP request before the transaction is canceled and a
timeout error is reported. The default timeout is 120 seconds.
Polling Set how frequently (in seconds) the SmartServer’s built-in Web pages poll
the SmartServer’s internal data server for data point updates. The default
poll rate is 1 second. Select the Disable check box to disable the polling of
data points by the SmartServer’s built-in Web pages.
You can use this property to adjust the amount of LAN/WAN traffic that is
generated by the SmartServer’s built-in Web pages.
Max Age of Data
Point Values Set the maximum period of time (in seconds) that data point values are
cached in the SmartServer’s internal data server before it polls the data
points and returns updated values to the SmartServer’s built-in Web pages.
This enables you to control the amount of traffic that is generated on a
specific channel by the SmartServer’s built-in Web pages. If you enable this
option, the default maximum age is 0.5 seconds.
The SmartServer compares the Maximum Age value to the amount of time
a data point value has been cached in its internal data server, and then does
the following:

If Maximum Age is less than the period of time the data point value has
been cached, the SmartServer’s internal data server polls the data point
and returns the updated value to the SmartServer’s built-in Web pages.

If Maximum Age is greater than the period of time the data point value
has been cached, the SmartServer’s internal data server returns the
cached value to the SmartServer’s built-in Web pages.

If Maximum Age is set to 0, the SmartServer’s internal data server
polls the data point and returns the updated value to the SmartServer’s
built-in Web pages regardless how current the data point is. This is the
default value if the Maximum Age option is enabled.