
2.7.4 EXTENDED MATH A
The Extended Math A (Emath A) module executes a selected function on three input variables A,
B, and C. The function to be executed by Emath A is selected by entering a function code (FC)
from the table below into datapoint B122. Numeric values for parameter constants K1 through K12
can also be entered into their respective datapoints, which may affect the output as determined by
the function code selected. The output can be a numeric (C029) and/or a logic (L099) value.
The tables that follow list the function codes, input variables, and parameters. An illustration of the
Emath module follows the tables. Complex function codes 15-19, which are listed in the table, are
described in Sections 2.7.4.1 through 2.7.4.3.
Extended Math Functions
FC C OUTPUT L OUTPUT FC C OUTPUT L OUTPUT
0 A No change 15 Piecewise characterizer No change
1(K1
×
A) + K2 No change 16 3rd order polynomial No change
2(K1
×
A) + (K2
×
B) + (K3
×
C) No change 17 11th order polynomial No change
3(K1
×
A
×
B
×
C) + K2 No change 18 Linear flow compensation No change
4(K1
×
[A
/
B]) + (K2
×
C) No change 19 Square root flow
compensation
No change
5([K1
×
A] + [K2
×
B]
/
C) + K3 No change 20 Limit to constant
(K1 < A < K2)
1 if A
≥
K2 or K1
≥
A
6([K1
×
A
×
B]
/
C) + K2 No change 0 otherwise
7([K1 + A]
/
[K2 + B])
×
K3 No change 21 Limit to variable
(K1
×
C < A < K2
×
B)
1 if A
≥
K2
×
B or K1
×
C
≥
A
8(K1
×
abs[A]) + K2 No change 0 otherwise
9K1
×
A
([K2
×
B] + K3)
No change 22 Compare to constant 1 if A
≥
K1
10 K1
×
2
([K2
×
A] + K3)
No change 0 if A < K1 - K2
11 K1
×
log([K2
×
A] + K3) No change 23 Compare to variable 1 if A
≥
(K1
×
B) + K2
FC + 128 yields square root of C output
0 if A < (K1
×
B) + K2 - K3
Inputs Inputs
WIRELIST SYMBOL DATA
TYPE
ASSIGNED VALUE WIRELIST SYMBOL DATA
TYPE
ASSIGNED VALUE
B119 A C B121 C C
B120 B C B122 FC N/A
Output Datapoints:
C029, L099
Parameters Parameters
SYMBOL DATAPOINT ASSIGNED VALUE SYMBOL DATAPOINT ASSIGNED VALUE
K1 C354 K7 C360
K2 C355 K8 C361
K3 C356 K9 C362
K4 C357 K10 C363
K5 C358 K11 C364
K6 C359 K12 C365
Section 2. FCS Modules
EMATH-A
2-11
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