Data Subscription - ABB 800xA User Manual

Data Subscription

The security configuration does not only affect the access rights, it also effects the
user interface. If an operation is denied by the security, the user interface is dimmed.
This does not work for uploaded objects and structures, since the security settings
are not uploaded. To make the user interface act the same way in the subscriber as it
does in the provider, the security in the subscriber node must be configured the same
way as it is in the provider node, with the difference that the subscriber user/group
must be used instead of the provider user/group. For details about security
configuration, see System 800xA, Administration and Security (3BSE037410*).
Advanced Access Control
If the advanced access control functions, re-authentication and double-
authentication, are used in the provider system it must also be activated in the
subscriber system. If it is not activated it will be possible to write to an OPC
property in the provider system without any re- or double-authentication dialog is
shown in the subscriber system.
Confirm write is not supported in the subscriber system. An OPC property that
requires confirm write will be changed to be read-only in the subscriber system.
Data Subscription
If the bandwidth of the connections between the subscriber system and the provider
system is low it can be useful to lower the subscription times for OPC data. The
System Connection aspect on the Remote System object has a configuration tab to
map the original subscription times for OPC properties to new values when a remote
connection is used.
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Section 3 Configuration
3BSE037076-510 D