What is the use of access control present in aspect category definition-> configuration tab of the aspect like First/second signature/Reauthentication/Double Authentication/Close at logover required?
Please give the example with explanations
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This option is required for additional security at the aspect level.
If you configure " First Signature Required" on function aspect, when ever an application engineer opens the function designer, it pops up authentication window. Any modifications require to be approved before starting it.
If you configure " close at logover " on any aspect, when ever a user does logover in wrkplace, that particular aspect closes automatically. ( This is enabled by default ).
The feature is designed for applications that require validation of all changes to the manufacturing process, including changes to the control system. This kind of requirement is comon in pharmaceutical applications.
By requiring a second "signature", a comprehesive audit trail of changes and approvals can be kept and nothing can be changed by "accident" or careless use of the OK/cancel button.