Property to get a structure

2020-02-27T14:08:08.312000Z

Hello,

I found my error;

As the property is a REFERENCE, I have to write "REF=" instead of "=" in the GET acces :

Property ReadAll : REFERENCE TO ErrorFB1;
GET
ReadAll REF=ErrorFB1;

Property to get a structure

2020-02-27T14:08:07.996000Z

Hello,
I have a little problem with property. (I use CODESYS V3.5 SP14)

I writted an objet FB1
FB1 Function blockVARErrorFB1: Struct1;END_VAR

I use MyFB1 :
VAR_GLOBALMyFB:FB1;END_VAR

Struct1 is a structure, declared like this :
Struct1:ErrorBit1:BOOL;ErrorBit2:BOOL;Error_Code:INT;END_STRUCT

I can write 3 properties to get the value of each variable ErrorFB1.ErrorBit1, ErrorFB1.ErrorBit2, .... wtih properties like this :
Property Read1 : Bool;GETRead1:= ErrorFB1.ErrorBit1;

It works well.

But I try to write only one property to get the entire structure ErrorFB1 :
Property ReadAll : ErrorFB1;

but It don't work.

I read somewhere, that I have to declare a REFERENCE, so I wrote :

Property ReadAll : REFERENCE TO ErrorFB1;GETReadAll :=ErrorFB1;

In my programme I use :
Default1:=MyFB.ReadAll;

And I get an exception when I run the simulation mode.

I am a beginner in the use of OOP. I looked for examples but I founded only "simple" one.
I have certainly made a monstrous mistake somewhere, but I do not see it

Thank you in advance for any help.
BR

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