2 fn_or example, 3 fn_compare example – Echelon i.LON SmartServer 2.0 User Manual
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i.LON SmartServer 2.0 Programmer’s Reference
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20 30 40 50
35
EMPTY 0.0
0
70 80 40 50
35
EMPTY 100.0
1
8.3.2.2.2 FN_OR
Example
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 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
is defined, then value of the compare data point is not used in the comparison.
The following table lists several case scenarios that show when these two functions might evaluate to
True (100.0 1).
Input 1
Input 2
Input 3
Input 4
Value of Compare Data
Point
UCPTtrueThreshold Output
9
11 12 13
Does
not
matter
since
defined.
10 100.0
1
20
30 40 50
15
EMPTY 0.0
0
20
30 40 50
25
EMPTY 100.0
1
20
30 40 50
35
EMPTY 100.0
1
8.3.2.2.3 FN_COMPARE
Example
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
compare data points must return True 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
comparison.
The following table lists several case scenarios that show when these two functions might evaluate to
True.
Input 1
Input 2
Input 3
Input 4
Value of Compare Data Point
UCPTtrueThreshold
Output
50
30
50
50
Does not matter since
40 0.0
0
40
40
40
40
Does not matter since
40 100.0
1
50 50 50 50
50
EMPTY
100.0
1
50 50 50 49
50
EMPTY
0.0
0