Axis in Structure

2020-02-27T13:48:31.959000Z

once again thanks.
I didn't know the REF principle... and command "REF="
Works well too...

Axis in Structure

2020-02-27T13:48:31.880000Z

Originally created by: scott_cunningham

Since you are using reference, this is better: _Test._Axis REF= SM_Drive_Virtual.

It's the same idea as pointers and ADR, without having to dereference with ^ all the time.

Axis in Structure

2020-02-27T13:48:31.811000Z

I Got it !!!

Structure declaration
TYPE Axis_Structure :
STRUCT
_Axis: POINTER TO AXIS_REF_SM3;
_Power : MC_Power;
bOn : BOOL;
bStart : BOOL;
END_STRUCT
END_TYPE

Then a link to set _Test._Axis := ADR(SM8Drive_Virtual) , it links the drive to the structure name
Then the MC_power input axis should be _Test._Axis^ to link the adresse content...

Thanks for your help...

Axis in Structure

2020-02-27T13:48:31.744000Z

I'm sorry I don't get what you mean.
I have to link the Axis of my structure to the virtual axis...
In order to do that I have to link the virtual axis to the name of my structure.
It means at some point, I have to have something like

_Test.Axis := SM_Drive_Virtual;
But as this lin,k should be bidierctional, maybe I have to go through pointer?

I try to figure how to do this, but without success up to now...

Axis in Structure

2020-02-27T13:48:31.665000Z

Originally created by: scott_cunningham

Try _Test_Axis._Axis instead. SM_Drive_vritual is not your axis steucture type, only of your _Axis member....

Axis in Structure

2020-02-27T13:48:31.593000Z

Hi Scott,

Thanks for your answer...
What you write makes a lot of sense because the Axis should be writable in the structure.
I have tried what you suggested, unfortunately, it creates exception in my PLC.

I have try with Pointer too without any success...
If you have any other Idea, I will read them with pleasure

My structure declaration is
TYPE Axis_Structure :
STRUCT
_Axis: REFERENCE TO AXIS_REF_SM3;
_Power : MC_Power;
bOn : BOOL;
bStart : BOOL;
END_STRUCT
END_TYPE

Build is ok
But when I login and start the project...
I have this

Axis in Structure

2020-02-27T13:48:31.511000Z

Originally created by: scott_cunningham

In your structure, I think it should be REFERENCE TO AXIS_REF_VIRTUAL_SM3 because your assignment of Axe_Virtua1 to _Test_Axis is a one way data transfer. Soft motion axes are VAR_IN_OUT types, which means data is assigned in both ways.

With REFERENCE TO, you only need to make the assignment once, and your _Test_Axis will actually be a pointer to your Axe_Virtual1 (which is what you were looking to do, if I understand correctly).

Axis in Structure

2020-02-27T13:48:31.227000Z

Hi Everybody,

I'm trying to insert Axis Structure in Structure like this:

TYPE Axis_Structure :
STRUCT
_AXis : AXIS_REF_VIRTUAL_SM3;
_Power : MC_Power;
bOn : BOOL;
bStart : BOOL;
END_STRUCT
END_TYPE

Then I declare a virtual axis in the SoftMotion General Axis Pool as Axe_Virtuel1
In the POU PLC_PRG this declaration
_test: Axis_Structure;

And _Test.axis := Axe_Virtuel1;

But when I want to use this axis in a MC_POWER for example, the axis can't be started, it seems not being reactiong on the MC_POWER input.

It means I'm doing something wrong...
Can Someone show me the right way?

Thanks

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