Echelon i.LON 100 e2 Internet Server - Manual (Page 149)

Table 48 FN_AND Examples
Input 1 Input
2
Input
3 Input
4 Value of Compare
Data Point
UCPTtrueThreshold Output
9 11 12 13 10 0.0 0 Does not matter since
is
defined.
20 30 40 50 10 100.0 1 Does not matter since
is
defined.
20 30 40 50 35 EMPTY 0.0 0
70 80 40 50 EMPTY 100.0 1
9.2.1.2.4 FN_OR Example
: FN_LT
Because the output function is FN_OR, and the comparison function is FN_LT, one of the
values of the data inputs must be less than the value of the compare data point, or the
value if it is defined, for the output data point to be set to True. If the
property is defined, then value of the compare data point is not used
in the comparison.
Table 49 lists several case scenarios that show when these two functions might evaluate to
True.
Input
1
Input
2
Input
4
Value of Compare
Data Point
35
: FN_OR
In this example, there are four input data points and one compare data point, all of the type
SNVT_count. There is one output data point, of the type SNVT_switch.
Table 49 FN_OR Examples
Input
3
UCPTtrueThreshold Output
9 11 12 13 Does not matter since
is
defined.
10 100.0 1
30 40 50 35 EMPTY 0.0 0
20 30 40 50 35 EMPTY 100.0 1
20 30 40 50 35 EMPTY 100.0 1
9.2.1.2.5 FN_COMPARE Example
20
: FN_COMPARE
: FN_EQ
: 100
In this example, there are four input data points and one compare data point, all of the type
SNVT_count. There is one output data point, of the type SNVT_switch.
Because the is set to 100, all comparisons made between the input
and compare data points must return True in order for the output data point to be set to
True. The comparison function selected is FN_EQ, so this means the values of the input data
points must match the value of the compare data point, or the
i. LON 100 Internet Server Program 9-12 mer’s Reference