Object development - DataTagAccess as InternalElement

[FabianSIK]

Hi all,

I try to develop a new object which should utilize the DataTagAccess as an "InternalElement". Building the object was no problem, but while testing TwinCat always gives me an exeption when using the read and write commands of the DataTagAccess.

I followed the "Press with 2 cylinders" example from the training and double checked everything. The exeption is thrown in the Extension OnCall method of the DataTagAccess object. I guess that some internal methods are not called correctly. Also the OutHmi struct of the Extension is not filled.

I used the code from an already testet subtree which works just fine. Just converting it to an object gives me problems.

Has anyone tried to build an object using internal elements and maybe got the same problem?

Thanks for any help.

Regards
Fabian

[nexidator]

Hard to tell what's wrong without looking at your implementation. Maybe it's easiest if you contact the Helpdesk in this case so we can contact you directly.

[FabianSIK]

How about publishing my implementation here?

[TommyF]

Which version of the DataTagAccess object is used?

The actual version is 1.2.12.0 with a bugfix in

V1.2.10.0  assigned address to OutCmd.pData to prevent 0-pointer exeption in case of read-/write-timeout

[FabianSIK]

I use the version 1.2.12.0.