Adding WORD values in a STRING

estam

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Join Date
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Hello I'm intermediate programmer who is wondering if somebody is able to point me in the right direction in getting a few values in a readable fashion within a string.

sCompleteMessage := '<L><PA><FA><MA><WA><FK>'+HMI_AantalPerUur+'<AC>/h <CF>'+HMI_BosAantal ;

HMI_AantalPerUur: WORD
HMI_BosAantal: WORD
sCompleteMessage: STRING

How do you get these combined??
This is a part of the programming I can't get right, I need to combine these to send it to a LED screen but have to calculate the CRC of this string.
That part I have found now to get it all together:D

So just a little guidance would be appreciated, Just for the record I need just a example to point me back on track again.
 
Welcome to the Forum !

What controller platform are you using ? The syntax and instructions for one may be different from another.
 
SoMachine V4.1 so basically CoDeSYS.

I may have written it down in the wrong way due to the fact it's partly copied from a C++
written piece of software.
I normally do not work with strings and so that's why I'm in limbo at this moment :)
 
Is there nobody who can point me in the right direction??
It maybe something obvious but I fail to see it.
 
I have not used CoDeSYS but a quick look at an instruction manual shows that there are conversion instructions - possibly WORD_TO_STRING. You will have to create strings for the two WORD values. Then you will concatenate these with literal strings of the other two sections. But don't ask me for a detailed example.
 
had found WORD_TO_STRNG and ANY_TO_STRING.
got me a lot off errors I could not lose.

have been a bit further at my problem and just need to figure out on how to get all segments together as one string.
It seems that this is holding me back.
The + sign does not work and the , is also giving me problems.
Give me inputs and outputs any time but working with strings is freaking me out.

sCompleteMessage := '<L><PA><FA><MA><WA><FK>'+AantalPerUur+'<AC>/h <CF>'+BosAantal ;

AantalPerUur : STRING
BosAantal : String

This is now the new problem :)
 
Googling about the concatenate command in CoDeSys seems to be CONCAT and takes two arguments. So you will probably have to invoke it a few times to build the complete string. This is an example line in the link I referenced -

INTEGER_STRING := CONCAT (BEFORE_DOT, AFTER_DOT);

Obviously 'BEFORE_DOT' and 'AFTER_DOT' are two strings. They get combined and stored into 'INTEGER_STRING'
 
Thanks Bernie,
gone try that one tomorrow.

As said working text and displays are new for me so I need to learn new tricks.
Where are the days gone for only a light as a indicator :)

Nah just joking, HMI's are a great thing these days but when you have to it all again after 10 years of not programming your just lost.
 
estam said:
Thanks Bernie,
gone try that one tomorrow.

As said working text and displays are new for me so I need to learn new tricks.
Where are the days gone for only a light as a indicator :)

Nah just joking, HMI's are a great thing these days but when you have to it all again after 10 years of not programming your just lost.
Click to expand...
Hi,

Here is a solution :

sCompleteMessage := CONCAT ( WORD_TO_STRING(HMI_AantalPerUur) ,WORD_TO_STRING(HMI_BosAantal));
 
I think this should be it, if I use ever tip I got

sCompleteMessage := CONCAT ('<L><PA><FA><MA><WA><FK>, WORD_TO_STRING(HMI_AantalPerUur)) ;
sCompleteMessage := CONCAT ( sCompleteMessage, '<AC>/h <CF>');
sCompleteMessage := CONCAT ( sCompleteMessage ,WORD_TO_STRING(HMI_BosAantal));

I'm not able to edit the project at this time but will update this post if all goes well.

Thanks for the pointing out of a even better shortcut.
 
Engineer_MG said:
Hi,

Here is a solution :

sCompleteMessage := CONCAT ( WORD_TO_STRING(HMI_AantalPerUur) ,WORD_TO_STRING(HMI_BosAantal));
Click to expand...

Just a question regarding the WORD_TO_STRING instruction.
Can you give it a string lenght limitation??
Or a way to add lenght to the string when you need spaces to get a uniform apperance when it's longer or shorter.
have tried some variations but none gave a error free result.

And by the way the example above does work so thanks again for that.
 
Again, I am not a CoDeSys expert but here's a method from other languages to 'left pad' a string (let's call it short_String).

I establish a string (let's call it space_string) with as many spaces as the desired length. Then

Temp_String = CONCAT(space_string, short_String)
Result_String = RIGHT(Temp_String, desired_Length)

Similarly if you wanted leading zeroes after a WORD_TO_STRING then CONCAT with a string made up of zeroes and then take the RIGHT portion.
 
Well i'm no expert either on CoDeSys:D
I do find it a interesting way to program.
After a period of at least 10 years i got on with it quite fast but found that I lack some skills on dealing with text based problems.
But then again we now have the internet and you can ask people if they may know a way to solve a problem.

But to come back on your answer i will try that, but i do believe it can be done in a other way.
Google gave a few suggestions but strangly they did not work.

At least we got something on the led display :)
 
estam said:
Just a question regarding the WORD_TO_STRING instruction.
Can you give it a string lenght limitation??
Or a way to add lenght to the string when you need spaces to get a uniform apperance when it's longer or shorter.
have tried some variations but none gave a error free result.

And by the way the example above does work so thanks again for that.
Click to expand...
Download the OSCAT basic library. OSCAT = Open Source Community for Automation Technology

http://www.oscat.de/downloadmanager/viewdownload/3-oscatbasic/44-oscat-basic-331-codesys3.html


Then install the library and there are tons of STRING functions that you can use.
 

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