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Function library LenzeDrive.lib

Analog signal processing

2.2.6 Arithmetic (L_ARIT)

2−11

LenzeDrive.lib EN 1.7

2.2.6 Arithmetic (L_ARIT)

This FB can arithmetically combine two analog signals.

L_ARIT

±32767

nOut_a

byFunction

nIn1_a

x/(1-y)/

nIn2_a

Fig. 2−9 Arithmetic (L_ARIT)

VariableName DataType SignalType VariableType Note

nIn1_a Integer analog VAR_INPUT

nIn2_a Integer analog VAR_INPUT

nOut_a Integer analog VAR_OUTPUT The signal is limited to ±32767.

byFunction Byte VAR CONSTANT RETAIN Selection of the function

Parameter codes of the instances

VariableName L_ARIT1 L_ARIT2 SettingRange Lenze

byFunction C0338 C0600 0 ... 5 1

Function

Selection of the function Arithmetic function Notes

byFunction = 0 nOut_a = nIn1_a

byFunction = 1 nOut_a = nIn1_a + nIn2_a

byFunction = 2 nOut_a = nIn1_a − nIn2_a

byFunction = 3

nOut_a +

(nIn1_a) @ (nIn2_a)

16384

byFunction = 4

nOut_a +

nIn1_a

nIn2 a

@ 164

If the denominator = 0,

the denominator is set = 1.

byFunction = 5

nOut_a +

nIn1_a

16384 * nIn2

@ 16384

Function in ST

CASE byFunktion OF

0: nOut_a:=nIn1_a;

1: nOut_a:= DINT_TO_INT ( LIMIT (−32767,( INT_TO_DINT (nIn1_a)+ INT_TO_DINT (nIn2_a)),32767));

2: nOut_a:= DINT_TO_INT ( LIMIT (−32767,( INT_TO_DINT (nIn1_a)− INT_TO_DINT (nIn2_a)),32767));

3: nOut_a:= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)* INT_TO_DINT (nIn2_a))/16384),32767));

4: IF (nIN2_a=0) THEN

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*164)),32767));

ELSE

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*164)/ ABS (nIn2_a)),32767));

END_IF

5: IF (16384− INT_TO_DINT (nIn2_a)=0) THEN

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*16384),32767));

ELSIF (16384− INT_TO_DINT (nIn2_a)>32767) THEN

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*16384/32767),32767));

ELSIF (16384− INT_TO_DINT (nIn2_a)<−32767) THEN

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*16384/−32767),32767));

ELSE

nOut_a= DINT_TO_INT ( LIMIT (−32767,(( INT_TO_DINT (nIn1_a)*16384)/(16384− INT_TO_DINT (nIn2_a)))

END_IF

END_CASE ;

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