S7 UDT question...

[uptown47]

Thanks TU,

I managed to replicate the 'calls' in FB2 by right-clicking on the network and inserting an empty box and then addressing it as per the variable declaration table...

Thanks for all your help...

I'm getting there.... very slowly but I'm getting there.....

;-)

 

[L D[AR2P#0.0]]

Typo - Forgot to update the FBZone numbers after the copy/paste. Used arrays purely for ease of copy/pasting.

Corrected project attached:

 

[uptown47]

Thanks LD.

Anyone know if its possible to monitor a UDT in the VAT table ?

If so, how? Do you have to directly write the address (eg. DB1.DBX0.0) or can you use symbolic addressing to monitor it? I can't seem to get it to work.

;-)

 

[TurpoUrpo]

Thanks LD.

Anyone know if its possible to monitor a UDT in the VAT table ?

If so, how? Do you have to directly write the address (eg. DB1.DBX0.0) or can you use symbolic addressing to monitor it? I can't seem to get it to work.

;-)

UDT is not stored data in itself, it is complex datatype. You can monitor same simple datatypes that are contained in your data described by udt.

Think about the naming. UDT = User Defined Datatype.

Think about this. You have memory of type int. Now when you access it the datype tell's what area is accessed from what memory location. Same goes for UDT, it just describes what is contained in some memory location.

 

[JesperMP]

No, you can only enter the basic data types in a VAT (=max 4 bytes).
You can enter a whole series of similar data though, i.e. 20 INTs, starting from DB10.DBW20.
If you write the symbolic address correctly, it will be accepted.

 

[uptown47]

UDT is not stored data in itself, it is complex datatype. You can monitor same simple datatypes that are contained in your data described by udt.

Think about the naming. UDT = User Defined Datatype.

Think about this. You have memory of type int. Now when you access it the datype tell's what area is accessed from what memory location. Same goes for UDT, it just describes what is contained in some memory location.

Thanks TU.

Is it possible to monitor the datatypes that make up a UDT in context though?

ie. To show in a VAT table - Meals.Drinks.Milkshake_Flavour.Chocolate etc ?

Or do you have to find the direct address (i.e. DB1.DBX0.0) and monitor that ?

Thanks

;-)

 

[uptown47]

No, you can only enter the basic data types in a VAT (=max 4 bytes).
You can enter a whole series of similar data though, i.e. 20 INTs, starting from DB10.DBW20.
If you write the symbolic address correctly, it will be accepted.

Thanks Jesper. You posted just as I was asking the question!

 

[TurpoUrpo]

Thanks TU.

Is it possible to monitor the datatypes that make up a UDT in context though?

ie. To show in a VAT table - Meals.Drinks.Milkshake_Flavour.Chocolate etc ?

Or do you have to find the direct address (i.e. DB1.DBX0.0) and monitor that ?

Thanks

;-)

If it is of simple datatype, eg Bool, Int, Dint, etc. I tried to say that but it seems I was not clear enough.

 

[uptown47]

If it is of simple datatype, eg Bool, Int, Dint, etc. I tried to say that but it seems I was not clear enough.

I think you are perfectly clear TU, unfortunately my old brain is the foggy one!!!

 

[L D[AR2P#0.0]]

One of the advantages of using FBs is that you can call the multiple instances in a loop. This can be done as the parameters are copied to the instance DB.
If you thought you had a foggy brain now, then I'd hate to think what it will be like after following the processing in the following example

 

[uptown47]

LD,

Really appreciate the example. Thank you. But that's like learning to play guitar by sitting down to watch an Ynqwie Malmsteen concert!

It's far beyond me at the moment although I'm slowly crawling my way towards some form of understanding of at least some of it...

Excuse me while I wipe up this CSF from my collar...

;-)