EDIT2 : Hello everydoby, I want to convert a BYTE to is corresponding ASCII string :

example :

a : INT ;

b : STRING;

a := 65; (ASCII code => A)

I would like the string 'A' in my var b ?

How can i do this ?

thank you

Hello, have you got examples using the library SysLibFileStream ?

Does it works with every PLC (can't find the corresponding document SysLibs_Overview.pdf) (In my case Moeller/Micro Innovation PLC)?

I've tried regarding ansi c definition but without any success

thank you

EDIT: On SysLibs_Overview.pdf from Moeller, they don't speak about SysLibFileStream, so I guess it doesn't work with ?

Regarding to my first question, I guess I may process like that

ascii:ARRAY[0..255] OF STRING(1):=33(' '), '!', '"','#','$$' ,'%' ,'&' ,'´','(' ,')' ,'*' ,'+' ,',' ,'-' ,'.' ,'/' ,'0' ,'1' ,'2' ,'3' ,'4' ,'5' ,'6' ,'7' ,'8' ,'9' ,':' ,';' ,'<' ,'=' ,'>' ,'?' , '@','A' ,'B' ,'C' ,'D' ,'E' ,'F' ,'G' ,'H' ,'I' ,'J' ,'K' ,'L' ,'M' ,'N' ,'O' ,'P' ,'Q' ,'R' ,'S' ,'T' ,'U' ,'V' ,'W' ,'X' ,'Y' ,'Z' ,'[','\' ,']' ,'^' ,'_' ,'`' ,'a' ,'b' ,'c' ,'d' ,'e' ,'f' ,'g' ,'h' ,'i' ,'j' ,'k' ,'l' ,'m' ,'n' ,'o' ,'p' ,'q' ,'r' ,'s' ,'t' ,'u' ,'v' ,'w' ,'x' ,'y' ,'z' ,'{' ,'|' ,'}' ,'~' ;

Hi,

you are right. SysLibFileStream is not supported by Moeller PLCs.

If you have only 1 byte which holds the corresponding ASCII value you can copy it directly to the string:

s1 : string;

b1 : byte;

p1 : pointer to byte;

p1 := ADR(s1);

if ( b1 > 32 ) then

p1^ := b1;

else

p1^ := 32; ( blank )

end_if

p1 := p1 + 1;

p1^ := 0; ( terminating zero )

This is alternative to your string table which works too.

regards

Klaus

in the open source library from oscat you can find such routines

w www.oscat.de w

thank you for your answers

Softwerker59, I don't understand this part :

p1 := p1 + 1;

p1^ := 0; ( terminating zero )

(I'm not realy fond of pointers)

hugo, thank you and great job, is there english documentation ?

Strings need a terminating character (0) so that the functions that use them know where the end of information contained within the string buffer is.

By moving a zero to the location that p1 is pointing at, you are putting that terminating character where it belongs in the string.

thank you