Echelon SmartServer 2.2 - Manual (Page 445)

446 Connecting Legacy Devices

Select Normally Open to send the current state of the nviClaValue input data point directly
to the relay outputs. When this option is selected, the SmartServer opens the relay when an
OFF value is received and closes it when an ON value is received. This is the default.

Select Normally Closed to invert the state of the nviClaValue input data point before
sending it to the relay outputs. When this option is selected, the SmartServer opens the relay
when an ON value is received and closes it when an OFF value is received.
6. Optionally, you can set manual override values for each of the two data points in their respective
input boxes. If you set an override value, the SmartServer uses this value and ignores any updates
to it.
To set an override value, you can select one of the pre-defined presets for the data point or enter a
properly formatted value. A manual override icon ( ) indicates that the data point is in manual
override mode.
The Digital Output application uses a priority of 100 to write values to the data point. This means
that another application must have a priority of 100 or higher to write to the data point. You can
release the lock the Digital Output application has on a data point, by clicking the Manual
Override icon. This temporarily resets the Digital Output application’s priority to 255 (the default
value), and it causes the SmartServer to notify all other applications in which the subject data
point is registered. The next highest priority application will then assume the priority for writing
values to the data point.