Patent ID: 8890652
Filing Date: 2014-11-18
Classification: G05B

Abstract:
1. A method for access control for a process on an automation plant comprising: by a computer, predetermining access rights by the access control dependent on the operating state of the process of the automation plant, determination of an emergency related to the an automation plant, and by the computer, at least during the emergency, granting extended rights for access control of the process independently of the access rights in a normal operation of control of the process; wherein the determination of the emergency triggers an emergency safety mode in which firm or tight control and allocation of access rights provided for normal operation is replaced by softer measures which can be or are evaluated later; and wherein the emergency safety mode includes a plurality of emergency safety mode sublevels that are activated incrementally and that, once actuated, provide different degrees of access rights for control of the process, wherein a first emergency safety mode sublevel is activated by a first emergency activation step and provides a first degree of access rights for control of the process, and a second emergency safety mode sublevel is activated by a second emergency activation step in combination with the first emergency activation step and provides a second degree of access rights for control of the process that is greater than the first degree of access rights.