How to get char from a Byte ASCII value in Codesys

Question

Good morning,

I would like to get the char which corresponds to a ASCII code. For example, if I have a byte with a value 16#68, I would like to get a char with value 'h'.

Thanks!

Answer 1

Codesys 3.5

VAR
    someByte: BYTE := 16#68;
    theChar: STRING(1);
END_VAR

theChar[0] := someByte;

A STRING is just an array of BYTES. You can replace any of them with whatever value you want.

Alternatives:

VAR
    someByte: BYTE := 16#68;
    theChar: STRING(1);
    bytePtr: POINTER TO BYTE := ADR(theChar);
END_VAR

bytePtr[0] := someByte; or bytePtr^ := someByte;

Or

Create a Union:

TYPE CHAR :
UNION
    ascii: STRING(1);
    raw: BYTE;
END_UNION
END_TYPE

theChar.raw := 16#68;