West Control Solutions KS98-1 - Manual (Page 144)

In this example, CONST output y16 = 0 is set.
The following formulas are calculated:
The left 2OF3:
x x x
y
1 1 2 1 3 0
2
1
Ч + Ч + Ч
=
and the right 2OF3:
x x x
y
1 1 2 1 3 2
4
1
Ч + Ч + Ч
=
Inputs/outputs
Digital inputs
fail1 Error message for input x1. With fail1 = 1, input x1 is not taken into account for mean value formation.
fail2 Error message for input x2. With fail2 = 1, input x2 is not taken into account for mean value formation.
fail3 Error message for input x3. With fail3 = 1, input x3 is not taken into account for mean value formation.
off Function switch-off: with off = 1, input x1 is output at y1.
Analog inputs
x1 Measurement input 1
x1mult
Factor input, pertaining to measurement input 1. Determination is made of how many measurement inputs the x1
consists (required with function block cascading or input
x1
not connected).
Non-connected input x1mult is evaluated as value 1.
x2 Measuring input 2
x2mult
Factor input, pertains to measurement input 2. Determination is made of how many measurement inputs the x2
consists (required with function block cascading or input x2 not connected ).
Non-connected input x2mult is evaluated as value 1.
x3 Measurement input 3
x3mult
Factor input, pertains to measurement input 3. Determination is made of how many measurement inputs x3 con-
sists (required with function block cascading or input x3 not connected).
Non-connected input x3mult is evaluated as value 1.
Digital outputs
err1 Error message: err1 = 1 indicates that at least one of inputs x1... x3 is not taken into account with mean
value formation.
err2
Error message: err2 = 1 indicates that mean value formation is omitted. Either several inputs (fail or differ-
ence > Diff) are disturbed or function was switched off by input off.
Analog outputs
y1 arithmetic mean value or switching to x1 occurred ( off= 1 or several inputs defective).
Casc
Factor: number of the values used for mean value formation.
Casc = x1mult + x2mult + x3mult.
Parameter
:
Parameter Description Range Default
Diff
Limit value for comparison of differences between inputs
x1 ... x3 for determination of faulty inputs.
0...999 999 1
No configuration parameters!
9499-040-82711 Selecting and storage
2OF3 ( 2-out-of-3 selection with mean value formation (No. 38)) III-144