4. Configuration
209
Settings
Figure 4-77. Project Settings, User and Groups Settings
The following basic configurations of user accounts can be done:
Maximum number of authentication trials
: if this option is enabled, the user account will become
invalid after the specified number of attempts to carry out the login with the wrong password. If
the option is not enabled, the user can perform as many attempts as you want. Default: enabled
option (3 attempts). Allowed values: 1-10.
Automatically logoff after time of inactivity
: if this option is enabled, the user account of the
connection will be automatically lost after a certain period of inactivity (lack of actions via
mouse or keyboard). Default: enabled option (10 minutes). Allowed time values: 1-180 minutes.
Access Right’s Management
User management in a project is only useful if combined with the management of access rights.
In a new project, basically all access rights are not set automatically, but set to a default value, that is,
usually the rights are "guaranteed".
During project execution, each right can be explicitly granted or denied and set back to the default.
The management of access rights is made in the
Permissions
dialog or - to access rights to objects -
the
Access Control
dialog (which is part of the
Object Properties
dialog).
The access rights to the objects are "inherited". If the object has a "main" object, the access rights of
this become the standard secondary object settings (erg. If an action is assigned to a program, it is
inserted in its structure Thus, the program is the object "main" action). With regard to access rights,
usually relations of the main objects - side correspond to the relations shown in the POUs or Devices
tree and are indicated in the
Permissions
dialog using the syntax "<main object> <secondary
object>.".
Example: Action ACT is attributed to MainPrg object (POU). Thus, in the window of the POUs,
ACT is shown in the object tree in MainPrg. In the
Permissions
dialog, ACT is represented by
"MainPrg.ACT" indicating that MainPrg is the "principal" of ACT. The right "change" was explicitly