OPC-UA with S7-1500 & UDT

rikmelssen · Post by **rikmelssen** » Thu Sep 16, 2021 8:56 am

Hello,

I've set up an OPC-UA connection with an S7-1500 PLC but can't get the reading of a whole UDT working.
The UDT's contain different items per object in the PLC and are effectively a specification of the options: before reading, I don't know the individual items contained in the UDT, so I can't point to the individual symbolic names.
With NODE-RED I've got it working but in OA, no go: does anybody know which datatype should be used to be able to read a UDT?
Or is this way of reading data simply not yet supported?

Best regards,
Rik

leoknipp · Post by **leoknipp** » Tue Sep 21, 2021 12:03 pm

It looks like UDTs are not supported in OPC UA in WinCC OA. I could not find any reference to it.
Possibly you can use the S7+ driver. As far as I have seen this drivers supports the usage of UDTs.

Best Regards
Leopold Knipp
Senior Support Specialist

rikmelssen · Post by **rikmelssen** » Thu Sep 23, 2021 11:41 am

Hi Leopold,
Thanks for the answer. At this moment the investigation is specifically aimed at OPC-UA. The S7+ driver is not an option.
Could there be any roadmap item that will add this?
In the 3.18 release there have been quite some OPC-UA improvements, so I kind of have my fingers crossed that this will appear in a near future patch.
Br. Rik

gschijndel · Post by **gschijndel** » Tue Sep 28, 2021 2:27 pm

Would browsing the PLC be an option for you to get the individual symbolic names?

Andorhal · Post by **Andorhal** » Wed Sep 29, 2021 2:00 pm

We will have support of structures/UDTs in the WinCC OA OPC UA client in 3.18 by end of the year (plan date!).

rikmelssen · Post by **rikmelssen** » Wed Feb 02, 2022 2:09 pm

Excellent! I saw patch 6 released in December and will look into it.

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