Beginner string question, RSLogix 5000

10PeopleInTheWorld · Oct 2, 2015

Hi,

I am reading on strings and having a hard time finding an instruction on making a string to display on the HMI. What I want to do is move a word into a string tag so that I can add it to a variable using concat. What instruction do I use to move the word "TEMP" into a tag "tmp"? thanks much

dmroeder · Oct 2, 2015

So I'm understanding that you have a STRING data type, and you'd like to put it into a temporary string so that you can CONCAT an integer to it.

If you want to "move" strings to another tag, you use the COP command.

In order to CONCAT an integer onto a string, I think you need to convert the integer to a string using the DTOS (DINT to STRING).

jmsmoreira · Oct 2, 2015

Not sure if this is want you want, but...

Just create the string tag, and on the monitor/edit tags, write 'TEMP' (or whatever you want) on the string value...

10PeopleInTheWorld · Oct 2, 2015

thanks for the reply,

COP would work if the text "TEMP" was already stored in a tag. What I want to do is store the text in a tag. For example, if I want to store the number 32 in a DINT tag I would use the MOV instruction. The MOV instruction does not work with strings because the source is alpha, so the instruction thinks "TEMP" is a tag, not raw text.

10PeopleInTheWorld · Oct 2, 2015

jmsmoreira said:
Not sure if this is want you want, but...

Just create the string tag, and on the monitor/edit tags, write 'TEMP' (or whatever you want) on the string value...

I think this will work. did not think about that, thank you

jmsmoreira · Oct 2, 2015

you're welcome

There's other ways, like moving the ascii code of each character to each
string position, and this way the MOV instruction works, but if you need a constant string I think it's easier just to write it like I said above...

Beginner string question, RSLogix 5000

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