S7: Evaluate bit pattern

Hedeby · Jan 26, 2012

Hello

I need to know how many input are true from at 5-bit pattern.
The True/False sequence is random.

The evaluation has to be in every scan, so a counter is not an option.

Is there a easy way of calculationg that?

L D[AR2P#0.0] · Jan 26, 2012

Here's an FC

Code:

FUNCTION FC 2 : INT
TITLE =
VERSION : 0.1

VAR_INPUT
  Bit0 : BOOL ; 
  Bit1 : BOOL ; 
  Bit2 : BOOL ; 
  Bit3 : BOOL ; 
  Bit4 : BOOL ; 
END_VAR
BEGIN
NETWORK
TITLE =
      L     0; 
      A     #Bit0; 
      JCN   s0; 
      +     1; 
s0:   A     #Bit1; 
      JCN   s1; 
      +     1; 
s1:   A     #Bit2; 
      JCN   s2; 
      +     1; 
s2:   A     #Bit3; 
      JCN   s3; 
      +     1; 
s3:   A     #Bit4; 
      JCN   s4; 
      +     1; 
s4:   T     #RET_VAL; 
END_FUNCTION

cjd1965 · Jan 26, 2012

Hedeby said:
The evaluation has to be in every scan, so a counter is not an option.

Why Not ? Use a int as a counter register

Code:

Counter=0
If bit 1=1 then counter+1
If bit 2=1 then counter+1
If bit 3=1 then counter+1
If bit 4=1 then counter+1
If bit 5=1 then counter+1
NoOfBits=Counter

Hedeby · Jan 26, 2012

Thanx, but i solved it by using af Loop function...

S7: Evaluate bit pattern

Hedeby

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L D[AR2P#0.0]

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cjd1965

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Hedeby

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