Echelon SmartServer 2.2 - Manual (Page 335)

336 Alarming
3. Click Submit. A reference to the “CompareDP” data point is added to the bottom of the Alarm
Generator functional block tree. This data point is a constant that has the same format, unit string,
and presets as the input point. Its default value is enabled and corresponds with the value entered
in step 2.
Selecting and Configuring a Comparison Function
You can select whether the Alarm Generator uses a binary or analog function to evaluate the value of
the input point against that of the compare point. After you select the comparison function to be used,
you configure the function. For the binary function, this means selecting the logical function to be
used to compare the points; for the analog function, this means defining offsets and hysteresis levels.
Using a Binary Comparison Function
To use a binary function for comparing the input point to the compare point, follow these steps:
1. In the Alarm box, click Binary and then click the Binary icon. The Alarm Generator: Binary
Web page opens.