Echelon i.LON 100 e2 Internet Server - Manual (Page 144)

i. LON 100 Internet Server Programmer’s Reference 9-7
Property Description
This property defines the comparison function the Analog Function Block
will use to compare the values of the compare data point and the input
data points. This function will only be used if the
selected is FN_COMPARE, FN_OR or FN_AND, and if the
property is not defined. These properties are
described later in the table.
When this function is used, the output data point will be updated to a True
or False value depending on the results of the comparisons made with this
function. If more than one input data point is defined for the Analog
Function Block, you can specify a percentage with the
property. If that percentage of the input data
points return True, the output data point will be updated to True.
Otherwise, it will be updated to False. The
property is described in more detail later in this table.
For descriptions of the comparison functions you can use with your Analog
Function Block, see Comparison Functions on page 9-10.
The percentage of input data points whose comparison result with the
compare data point (or with the value of the
property, if it is defined) must be True in order for the output data point is
set to True. The comparison to be performed between the input and
compare data point values is determined by the
selected.
For example, if this field is set to 30.0, 30% of the input data points must
return True in order for the output data point to be set to True. This field
has a range of 0.0 to 100.0.
This property specifies the compare value to be used with the input data
point when the comparison function selected for the Analog Function Block
is FN_OR, FN_AND or FN_COMPARE. This property will only be used if
the input data point(s) uses a scalar or enumeration value. This property
can not be used if any of the input data point use the format type
SNVT_switch.
If this property is not defined, all the comparisons will made with the value
of the compare data point. You can select a compare data point by filling in
the element, which is described later in the table.
Scenarios that may assist you in understanding how to use this property
follow the Comparison Functions section on page 9-10.
The output function for the Analog Function Block. This determines the
operation the Analog Function Block will perform each time its data points
are updated, and how the value of the Analog Function Block’s output data
point will be determined.
For descriptions of the output functions you can use with your Analog
Function Block, see Output Functions on page 9-10.
The minimum value that the output data point can be assigned. This value
is initially taken from the SCPT resource files.
The maximum value that the output data point can be assigned. This value
is initially taken from the SCPT resource files.