Hello,
I'm experiencing a problem with the CFC editor, I've a function block with an input of the UDT data type. This function is called many times in the CFC environment, and it's connected to several variables in a DB having the same UDT data type. The problem I have is that adding or removing a variable on the UDT, after regenerating both DB and FB, when I update the block types in CFC, it deletes all the connections I made before. Does anybody knows if there's any way not to lose those connections? For me it would be enough also to have them changed as text connections. Thanks in advance

Hello,

regarding to your inquiry we would like to inform you. Please see our example program with STEP 7 together with CFC which this is a connection with UDT-Variable. We can not reproduce your described problem. See also the FAQ of CFC-connections

http://support.automation.siemens.com/WW/view/de/15350578

It is possible that there are not enough space of your hard disk and/or virtual work memory. We recommend to check the hard disk and the virtual work memory and see in this case the FAQ:

http://support.automation.siemens.com/WW/view/de/20440472

Otherwise it is possible that this is a software (STEP 7, CFC, ...) which is not compatible with the operating system Windows. See in these case also the following FAQs:

http://support.automation.siemens.com/WW/view/de/8250891

http://support.automation.siemens.com/WW/view/de/18734363

With best regards
Cicero

Attachment: Cfc_udt.zip  (7 Downloads)

Thanks a lot for your reply. I tried all of your suggestions but I think this is something with the CFC editor. I'm actually using all the latest versions of the simatic products. The behaviour seems to happen with the version 6.1 SP1 HF4 and also with the new version 7.0.
My laptop settings about the virtual memory are already made in the way Siemens suggested on the topic you sent me.
To help you easely understand the issue, you will find as an attached file a sequence of images describing the operations I made to get the problem.

Attachment: Issue Steps.zip  (4 Downloads)