User manual
IEC61131 User and Reference Manual
April 22, 2008
528
Short Floating Point Analog Input parameters are set in this property page. Each parameter is
described in the following paragraphs.
The Number of Points displays the number of Short Floating Point Analog Inputs reported by the
RTU. This value will increment with the addition of each configured Short Floating Point Analog
Input point. The maximum number of points is 9999. The maximum number of actual points will
depend on the memory available in the controller.
The Starting Address parameter specifies the DNP address of the first Short Floating Point Analog
Input point.
The Event Reporting Method selection specifies how Short Floating Point Analog Input events are
reported. A Change Of State event is an event object, without time, that is generated when the point
changes state. Only one event is retained in the buffer for each point. If a subsequent event occurs for
a point, the previous event object will be overwritten. The main purpose of this mode is to allow a
master station to efficiently poll for changed data. A Log All Events is event object with absolute
time will be generated when the point changes state. All events will be retained. The main purpose of
this mode is to allow a master station to obtain a complete historical data log. The selections are:
Change of State
Log All Events
The Event Buffer Size parameter specifies the maximum number of Short Floating Point Analog
Input change events buffered by the RTU. The buffer holds all Short Floating Point analog input
events, regardless of the class to which they are assigned. If the buffer is completely full the RTU
will lose the oldest events and retain the newest; the ‘Event Buffer Overflowed’ IIN flag will also be
set to indicate that the buffer has overflowed. The Event Buffer size should be at least equivalent to
the number of Short Floating point analog inputs defined as Change of State type. That will allow all
Short Floating Analog Point Inputs to exceed the deadband simultaneously without losing any
events. The value of this parameter is dependent on how often Short Floating Point Analog Input