How can I do a Data Layer Remote Communication to a limited set of nodes?

The trick is to create a data layer scope and add the Data Layer addresses you want to access and in addition add "datalayer/**" and "types/**" to the "permissionsR". 

Here a short step by step guide:

1. Create a scope at the Data Layer of the remote ctrlX OS device (the Data Layer you want to import via DLR-Communication). In this example the user should be able to access (rwx) everything below the path "sdk/":
   

   

2.  Create a user (on the same control) and assign this Data Layer scope to the users individual permissions (at Settings -> Users&Permissions)

3. Create the Data Layer Remote Communication on the other ctrlX OS Device (the one where you want to receive the data). For the connection use the user with the limited access. 
   

   

    

    

See also these links for more information:

• Application Manual - Chapter Data Layer - Security 
• How to do a Data Layer Remote Communication