User-Defined Security Groups
You can create as many user-defined security groups as you need, and you can add as many members to each group as you need. After you've created your user security groups and defined the membership, you can assign a group to a Plant Applications entity (such as, variables and displays).
Display-Level Variable Security
A site parameter, UseDisplaySecurity, enables you to defer variables with a designation of No Security Group to a display-level security group. When set to False, the default, variables (for example, in Autolog sheets) use variable-level security settings and when no security is assigned a default is used. When set to True, the security set for the display applies to all variables in the display that do not have variable-level security defined. Security for variables can now be set by changing the security for the display, thus avoiding having to set the security for each variable. Rights assigned at the variable level override rights at the display level.
Security for variables affects whether a user has rights to enter or change variable data. It also affects what variables can be accessed during a calculation or by the historian, which normally requires administrative privileges. Privileges can now be set at the display level to override default privileges for variables having no security group assigned.
Access Levels and Privileges
You can assign one of four access levels to a member of a user-defined security group. The access level determines what the user can do, depending on the entity to which the user group is assigned.
For a complete list of access levels and privileges, please see Display Access Levels and Privileges.
See Also
The Administrator Security Group