Permissions system

You can issue user group-specific permissions at three levels in the permissions system of the TwinCAT HMI User Management.

1. The control level represents the client-side permissions system of the TwinCAT HMI Framework. This is a manipulation of the user interface through the hiding of controls or the deactivation of their functions, depending on which group(s) the logged-in user belongs to.
2. The symbol level controls the user group-specific access to server symbols (mapped symbols).
3. The file level enables the user group-specific access to the files made available by the TwinCAT HMI Server.

While level one is purely a manipulation of the user interface on the client side, the second and third levels offer real data security on the server side.

In order to be able to configure the rights of the system user groups at the individual levels, you have to activate Advanced Mode in the TwinCAT HMI Configuration window.