Echelon SmartServer 2.2 - Manual (Page 495)

496 Using the SmartServer with OpenLNS CT
1. In OpenLNS CT, drag the functional blocks for the external devices to the OpenLNS CT drawing,
and drag the SmartServer’s Alarm Generator and Alarm Notifier functional blocks from the
SmartServer Static Shapes stencil to the drawing.
2. Connect the output network variable on the thermostat to the nviAgInput input network variable
on the Alarm Generator functional block. The nviAgInput input network variable contains the
value to be evaluated by the Alarm Generator.
Connect another compatible output network variable to the nviAgCompare input network
variable on the Alarm Generator functional block, or use a Data Point shape or the OpenLNS CT
Browser to set the value of the nviAgCompare network variable. The nviAgCompare input
network variable represents the value to that will be evaluated against the nviAgInput network
variable. You can also specify a constant value to be compared against the nviAgInput network
variable using the Alarm Generator configuration Web page in the SmartServer Web interface.
By default, the referenced network variables on the on the Alarm Generator are of a
SNVT_temp_f type. If this type is not compatible with the output network variables on the
devices to which they are bound, you can change the type. To do this, right-click the network
variable on the Alarm Generator functional block and then click Properties in the shortcut menu.
In the Type Name property, click the button to the right to open up the Select Network Variable
Type dialog and then change the network variable type.
You can repeat this process for changing the types of other dynamic network variables on the
SmartServer’s Alarm Generator, Alarm Notifier, Analog Functional Block, and the Real-Time
Clock functional blocks so that they are compatible with the network variables on other devices.
3. Connect the nvoAgAlarm output network variable on the Alarm Generator functional block to the
nviAnAlarm input network variables on the Alarm Notifier functional block. Both of these
network variables are of a SNVT_alarm type.
4. Connect the nvoAnAlmFlag output network variable on the Alarm Notifier functional block to
the input network variable on the AC unit that enables and disables the device (for example, an
nviEnable network variable). The nvoAnAlmFlag output network variable is of a SNVT_switch
type.
5. Open the Alarm Generator Configuration Web page on the SmartServer following the steps
described in the previous section, Opening SmartServer Applications with OpenLNS CT. The
Alarm Generator: Configure Web page opens.