TIA copy boolean data to a word

[Jonnie_R]

Hi,

I'm still at the beginning of my journey with TIA, and am doing something for which I'm sure there must be a better way than writing each bit individually.

I have a data type that I defined with 15 boolean tags in, however I want to pack these individual tags into a word inside a data block for the SCADA system to read, rather than individual bits.

To achieve this at the moment I am doing it bit by bit in ladder which just seems uneconomical, especially when I have to repeat this several times.

Please tell me there is a better way.

Thanks.

Edit: Found a way with a bit of Googling. Thanks if you looked anyway.

 

[L D[AR2P#0.0]]

Please post your alternative for future reference.

 

[janner_10]

I'd make my own FC and use it throughout.

 

[kalabdel]

Depending on your version of TIA scatter and gather work very well.

 

[Jonnie_R]

Please post your alternative for future reference.

I found a suggestion from a Googling that led me to create a function in SCL that takes 16 bits as inputs and outputs the word using the following simple code:

FUNCTION "BitsToWordL2" : Void
TITLE = PACK BITS TO A WORD
{ S7_Optimized_Access := 'TRUE' }
AUTHOR : JRead
FAMILY : COGEN
VERSION : 0.1
//Pack bits into a word by taking inputs as bits and writing out to a word
   VAR_INPUT 
      bit00 : Bool;  
      bit01 : Bool;   
      bit02 : Bool; 
      bit03 : Bool;  
      bit04 : Bool; 
      bit05 : Bool;  
      bit06 : Bool;  
      bit07 : Bool; 
      bit08 : Bool;  
      bit09 : Bool; 
      bit10 : Bool;  
      bit11 : Bool;  
      bit12 : Bool;  
      bit13 : Bool;  
      bit14 : Bool;  
      bit15 : Bool;  
   END_VAR

   VAR_OUTPUT 
      "WORD" : Word;   // Output word from bits
   END_VAR


BEGIN
	// Pack bits to the word
	#WORD.%X0 := #bit00;
	#WORD.%X1 := #bit01;
	#WORD.%X2 := #bit02;
	#WORD.%X3 := #bit03;
	#WORD.%X4 := #bit04;
	#WORD.%X5 := #bit05;
	#WORD.%X6 := #bit06;
	#WORD.%X7 := #bit07;
	#WORD.%X8 := #bit08;
	#WORD.%X9 := #bit09;
	#WORD.%X10 := #bit10;
	#WORD.%X11 := #bit11;
	#WORD.%X12 := #bit12;
	#WORD.%X13 := #bit13;
	#WORD.%X14 := #bit14;
	#WORD.%X15 := #bit15;
	
END_FUNCTION

I also used the reverse to write out a word into bits.

 

[JesperMP]

For functions like this I use the AT view method.
Basically it allows you to declare an alternative data structure for the same memory area.

Below is an example. Notice that the starting addresses are the same (18.0 and 22.0), for subsequent data structures.

The caveat is that either the data must be non-optimised, or you have to select the retain to "Set in IDB".

In the TIA help system, search for "Overlaying tags with AT"

 

[Lare]

For functions like this I use the AT view method.
Basically it allows you to declare an alternative data structure for the same memory area.

Below is an example. Notice that the starting addresses are the same (18.0 and 22.0), for subsequent data structures.

The caveat is that either the data must be non-optimised, or you have to select the retain to "Set in IDB".

In the TIA help system, search for "Overlaying tags with AT"

Is AT command possible for every language on TIA or only for SCL as on classic?

 

[mk42]

Is AT command possible for every language on TIA or only for SCL as on classic?

If I recall, it is all languages, but for optimized blocks the retentive setting needs to be "set in IDB" for some reason.