How do I pass different string size to AOI?

BachPhi · Feb 20, 2020

I have a AOI, inside I have a 'Str_Source' declared as INOUT with STRING data type.
It works fine using the same string data type, but I want the AOI to be more generic, ie. can use different string sizes [ larger than 82].

Thanks in advance for any help.

Contr_Conn · Feb 20, 2020

You can create a custom string size with any number of characters.
Just set the largest size you may need.
Actual strings passed via parameters can have less than that as long as data type is the same.

BachPhi · Feb 20, 2020

A custom string is defined as being different from 82 char. I am asking to be able to use any custom string size. so your response does not really answer my question.

Contr_Conn · Feb 20, 2020

As far as I know, tag data type must match parameter definition.

BachPhi · Feb 20, 2020

I am exploring it with passing is as SINT array, then SIZE it, and recombine it back to string.

dmroeder · Feb 20, 2020

Just an out loud thought here but if you made a custom string that was large enough to contain the maximum amount of characters you would want, make it a parameter of your AOI but maybe a "not visible" and "not required", then maybe you could map values to is using COP external to the AOI.

Contr_Conn · Feb 20, 2020

String can be only passed as InOut that is automatically forces it to be Visible and Required.

BachPhi · Feb 20, 2020

BachPhi said:
I am exploring it with passing is as SINT array, then SIZE it, and recombine it back to string.

Here is one that works using different DINT array size:
https://trutegra.com/handling-different-array-lengths-with-one-aoi/

theColonel26 · Feb 21, 2020

Does RS 5000 support references? Could you pass in a Reference to the string?

jkerekes · Feb 21, 2020

InOut values are passed by references.

BachPhi · Feb 21, 2020

BachPhi said:
I am exploring it with passing is as SINT array, then SIZE it, and recombine it back to string.

The concept works, details for the solution is found here:

https://www.advancedhmi.com/forum/index.php?topic=2209.msg15793#msg15793

How do I pass different string size to AOI?

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