Data Table as Function In

[Daniel_EWW]

I like to link different Data Tables (Indexed) to one Function as IN parameter.

Has someone done this already? What I'm doing wrong? (Please see example Function1 Rung 1; Direct linking is possible Function1 Rung 2)

 

[ORSO2001]

hi Daniel_EWW,

i think that the "problem" is that the DT_Index as FunctionIn variable is not able to define the type/lenght of sructure that it is referring (seems somthing like late binding)...then is not able to let you select the right local or global structure variable to store the "value".

[Daniel_EWW]

hi ORSO2001,

thanks for you answer. i think i understand what you mean. but it is possible to define a struct as FunctionIn without problem. a data table is (in my understanding) a struct with a row index.

 

[Saragani]

A data Table is an array of structs in that matter.

The only way, currently, to work with a Data Table that is passed to a function is the function is a C function, and then work with pointers in order to read and write data from that table.

It is not a nice code, and I know someone from another department in our company that did that. And there is also a limitation. The C function knows the type of the struct that is used in the data table. It is not like you can define a generic function that can work with any data table structure.... It just let you pass the Data Table as a reference (so if you have 2 tables of the same struct, then you can pass a different table each time).

 

[Daniel_EWW]

Saragani,

please can you share an example C- code function to pass on a Data Table as reference?

Thanks!

 

[timboekhorst]

@Saragani Could you share an example project? Since I'm trying to do the same.