6.2 User security/Access control

6.2.1 On IMM

On the IMM authentication via user name and password is commonly used.

6.2.2 On MES

For the users and roles of the connection the following applies:

User names can be manufacturer dependent.

Standard roles are

“OPC40077”: read and write access for selected parameters

“OPC40077_read_only”: no writing permissions

Manufactures can add additional roles. They may not start with “OPC40077”. For these roles, more parameters can be writeable than for the OPC40077 role.

The standard user “OPC40077” has the role “OPC40077” (and no other additional role), “OPC40077_read_only” has the roll “OPC40077_read_only” (and no other additional role); the passwords for the standard users are defined by the manufacturers (they may be empty).

NOTE: OPC UA also allow an anonymous-token (e.g. for testing)