BOOL ARRAY TO WORD ARRAY Schneider

I need to move a large Bool array to Word array in Schneider Control Expert.
Is there an easier way to do this?
For example: Bool[128] array to Word[8] array
My actual Bool array is [1024]
Thanks in advance.

Maybe the COPY_AREBOOL_ARINT function block?

Here's pseudo-code for a possibility. It assumes that the arrays begin with index 0 so it will need to be adjusted if you use index one (I'm a C programmer). It assumes that you have to do all the elements at one pass. It assumes that you are using structured text . It assumes that the result array is not allowed to go through temporary values during the execution of the pass.

Bits_In - ARRAY [0..127] of BOOL
Word_Out - ARRAY[0..7] OF WORD
Temp_Words - ARRAY[0..7] OF WORD
UINT Word_Loop, Bit_Loop;
WORD Or_Mask

(* Zero out the temporary array *)
FOR Word_Loop:= 0 to 7 BY 1 DO
Temp_Words[Word_Loop] = 0;
FOR Bit_Loop := 0 to 15 BY 1 DO
IF Bits_In[Word_Loop * 16 + Bit_Loop] == TRUE THEN
Or_Mask := 1;
IF Bit_Loop > 0 THEN
shift Or_Mask left Bit_Loop bits
END_IF;
Temp_Words[Word_Loop] := Temp_Words[Word_Loop] OR OR_Mask;
END_IF;
END_FOR;
Word_Out[Word_Loop] = Temp_Words[Word_Loop];
END_FOR;

You have to make sure the compiler uses a bitwise (not a logical) OR when you use the OR_Mask to turn the bit on.

This quickly given answer is not ready to go - it needs some research to be Schneider-specific. One advantage of it is that the method is mostly processor-independent so it can be easily modified for any CPU.

Eliminating the temporary buffer would give a little more speed. If the shift mechanism is guaranteed to behave itself with a count of zero the extra IF could be eliminated.

Copy bool to int and them aliasing maybe work for type conversion.

(or if you have %MW area for words them type same %MW addresses for words and int variables, and type conversion is done on %MW side without int_to_word conversion blocks on code side.)



Years ago I tested DDT to int and bools transfer, so extract block (should) also work.
http://plctalk.net/qanda/showthread.php?p=776365

chud said:

Maybe the COPY_AREBOOL_ARINT function block?

Click to expand...

COPY_AREBOOL_ARINT Function block worked for me.
I had to change my Bool array from Bool to EBool.
Thanks all for your time and effort. Much appreciated.