Hi!

How long can a WSTRING be in Codesys V3 if I concat it with Standard64 library?
Is it maximum 1000 characthers or does it depends how many memory I have left to use?

So I can concat a array for 1000 elements to one WSTRING if each element has e.g 5 characters?

Best regards

Volvo742 hat geschrieben:
Hi!
How long can a WSTRING be in Codesys V3 if I concat it with Standard64 library?

255 chars

You can use other methods to do it (pointers, SysMem, etc.)

e.kislov hat geschrieben:
255 chars

But isn't that STRING ?

Zitat:
As a rule, CODESYS does not limit the string length; however, If a variable is initialized with a string that is too long for the data type, then CODESYS truncates the string accordingly from the right.

https://help.codesys.com/api-content/2/ ... -3s-string m

"String functions" are all functions which used for any strings. No matter STRING type (ASCII-based charset) or WSTRING (Unicode/UCS2) - only 255 chars supported in Standard/Standard64 library.

e.kislov hat geschrieben:
"String functions" are all functions which used for any strings. No matter STRING type (ASCII-based charset) or WSTRING (Unicode/UCS2) - only 255 chars supprorted in Standard/Standard64 library.

Ok. So there is no idea to have a longer string?

Who set the 255 limit? That's very bad.

As I say before - pointers, SysMem...
So you need to use memory manipulation.

Hi,
would recomended to use StringUtils.library!

BR
Edwin

StringUtilsExample.project [476.59 KiB]

Edwin Schwellinger hat geschrieben:
Hi,
would recomended to use StringUtils.library!
BR
Edwin

Thanks! So there is no limit for StringUtils library?

I included the library StringUtils, but still, the maximum string length is 80 chars.

You need to use the function calls in Stu and not the Standard library. For example:

Stu.Standard.LEN should really be Stu.StrLenW
Stu.Standard.CONCAT should really be Stu.StrConcatW

If you look at the data type of Stu.Standard.LEN/CONCAT it is looking for a string input which has the 255 character max. This means anything you pass it automatically gets truncated if it is larger than 255. The Stu.StrLenW input is looking at a pointer which it will iterate through until it finds the terminating zero character. This gives it a way to not be size restricted.

So for your code try

StringLength := Stu.StrLenW(ADR(TomString));

StringLength needs to be DINT. This is like how Edwin did it but he used WSTRING instead of STRING so different function calls are needed.