Client - Write into User Created Datatype

[AlexMacabu]

Hello! I have an S7-1212 as Server and I created a Data Type called 'sequenceDT' which is made of 6 integer variables, 1 array of 15 integers and 1 array of 5 bool. Then I created an array of 50 'sequenceDT' and published on the OPC Server. How can I write into one of the variables of that array?
The nodeID is 'ns=5;s="opcData"."sequence"'

So, 'sequence' is an array of 50 'sequenceDT', so I was hoping the address would be something like 'ns=5;s="opcData"."sequence".[0]."prog"' for one of the integer variables and 'ns=5;s="opcData"."sequence".[0]."args".[0]' for one of the arrays, but apparently it isn't.

Could someone help me out, please?

[schroeder-]

Did you try to write the node in uaexpert?

This should work if the value is a array:

client.load_type_definitions()
struct = client.get_node('ns=5;s="opcData"."sequence"')
data = struct.get_value()
data[0].prog = .....
struct.set_value(data)

If it doens't work I would consider switching to the asyncua library. Because this is no longer in development and is missing a lot of features/bugfixes, that are in asyncua.

[AlexMacabu]

Thanks a lot for the help! I have just found a workaround the issue using Siemens SiOME software. Turns out if you add the variables one-by-one you get to see each element of the array, but if you drag & drop the entire DB you only see the array as one object!
Thanks a lot!

[AndreasHeine]

siemens uses "expose its array" in some places as a generic! thats not always the case...