Echelon SmartServer 2.2 - Manual (Page 441)

442 Connecting Legacy Devices
3. To set the sample interval, enter the time (in seconds) in the box below the Pulse icon and the PC
value text. The default sample interval is 15 minutes (900.0s). This value also determines how
frequently the output data point values are updated.
4. To specify a starting value for the nvoPcValue or nvoPCValueDif data points, select the STORE
check box, enter the starting value in the box above the corresponding outpoint data point. The
starting value you specify overwrites the pulse count or pulse rate previously calculated by the
SmartServer. When the STORE check box is selected, the data point value is not updated as a
result of polling.
5. To change the unit of measure used for the nvoPcValue and nvoPCValueDif data points, select
the corresponding data point type in the list below the nvoPcValue data point. You can select
units of measure such as Wh and kWh in load and load factor formats, and volts and gallons in US
customary and SI unit formats. The default unit of measure is kWh load factor
(UNVT_elec_kwh_lf).
If you have specified an OpenLNS Server and an OpenLNS network database in the Setup – LON
Network Driver Web page, the SmartServer transmits the change in data point type to the
specified OpenLNS network database automatically. See Adding an OpenLNS Server to the LAN
in Chapter 3, Configuring and Managing the SmartServer , for more information on adding an
OpenLNS Server to the LAN. See Chapter 5, Using the SmartServer as a Network Management
Tool, for more information on configuring the L
ON W ORKS network driver properties.
6. You can monitor the nvoPcValue and nvoPCValueDif output data points using an Alarm Notifier
or Data Logger. For more information on using these applications, see Chapter 7, Alarming and
Chapter 8, Data Logging. You can also translate the output data points to a compatible type for
use in another SmartServer application using a Type Translator. For more information on using
the Type Translator application, see Chapter 11, Using Type Translators.
Connecting Digital Input Devices
The SmartServer includes two optically isolated, polarity sensitive digital inputs that you can use to
monitor switch and sensor devices such as switches and push buttons and send the data to other
devices. To connect a digital input device to the SmartServer and use the Digital Input application,
follow these steps:
1. Connect the digital input device to one of the digital inputs on the SmartServer. See the
SmartServer Hardware Guide for instructions on how to do this.
2. Open the Digital Input application on the SmartServer. To do this, click General; expand the
network icon in the SmartServer tree, expand the LON channel, expand the i.LON App
(Internal) device; and then click Digital Input functional block corresponding to the input
connection on the SmartServer to which the device is attached.