Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Manual de usuario descargar pdf (Pagina 21)

2.7.5 MATH A

The Math A module executes a selected function on three input variables A, B, and C. The func-

tion to be executed by Math A is selected by entering a Function Code (FC) in datapoint B126. Nu-

meric values for parameter constants K1, K2, and K3 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 (C030) and/or a logic (L098) value.

The tables that follow list the input variables, parameters, and function codes. An illustration of the

Math A module follows the tables.

Inputs Parameters

WIRELIST SYMBOL DATA

TYPE

ASSIGNED VALUE SYMBOL DATAPOINT ASSIGNED VALUE

B123 A C K1 C076

B124 B C K2 C077

B125 C C K3 C078

B126 FC N/A

Output Datapoints:

C030, L098

Math Functions

FC C OUTPUT L OUTPUT FC C OUTPUT L OUTPUT

0 A No change 10 K1

([K2

A] + K3)

No change

1(K1

A) + K2 No change 11 K1

log([K2

A] + K3) No change

2(K1

A) + (K2

B) + (K3

C) No change 20 Limit to constant

(K1 < A < K2)

1 if A

≥

K2 or K1

≥

3(K1

C) + K2 No change 0 otherwise

4(K1

B]) + (K2

C) No change 21 Limit to variable

(K1

C < A < K2

1 if A

≥

B or K1

≥

5([K1

A] + [K2

C) + K3 No change 0 otherwise

6([K1

C) + K2 No change 22 Compare to constant 1 if A

≥

7([K1 + A]

[K2 + B])

K3 No change 0 if A < (K1 - K2)

8(K1

abs[A]) + K2 No change 23 Compare to variable 1 if A

≥

(K1

B) + K2

9K1

([K2

B] + K3)

No change 0 if A < (K1

B) + K2 - K3

FC + 128 yields square root of C output

FCS 53MC5000 Flexible Control Strategies

2-14

MATH-A

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 200 201

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