Can't connect a pointer (string)

I made an SCL block.

I have a String parameter, 200 records...

Data_in: ARRAY[1..200] OF STRING;


On the outside of the block I'm trying to connect the right DB with his array of 200 strings (length = 30).

Why can't I connect a pointer ?

Message in S7: Actual data type ARRAY does not fit in the formal type ARRAY Of the formal parameter Data_in


...

Not sure what goes wrong for you.
I just made a test.

UDT "UDTstrARR" with
..strARR=ARRAY[1..200] OF STRRING[20]

DB "MyStrings" with
..in=UDTstrARR
..out=UDTstrARR

FC2 in SCL
in OB1
Works OK.

If you do not specify the length of the string, the compiler/editor will assume it is of length 254

As your DB has strings of length 30 in it, you must specify the same string length in the FC parameter, i.e.

ok

I've rewritten it a little easier, and did not need the input parameter anymore... But, I understand that I had to specify this, I tried it and you're right. Thanks, I learned.

L D[AR2 said:

If you do not specify the length of the string, the compiler/editor will assume it is of length 254

As your DB has strings of length 30 in it, you must specify the same string length in the FC parameter, i.e.

Code:

Data_in: ARRAY[1..200] OF STRING[30];

Click to expand...