Patent ID: 11936642
Assignee: SCHWEITZER ENGINEERING LABORATORIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An intelligent electronic device (IED) comprising
memory to store a password associated with a maximum access setting corresponding to a maximum access level that a user is allowed to reach in the IED, and one or more electronic access control variables, wherein the one or more access control variables control an access level of the IED, and the one or more access control variables are set based on logic equations;
a first communication interface configured to couple the IED to an Engineering Access Human Media Interface (EA HMI);
a second communication interface configured to couple the IED to an external source and receive an input for the logic equations from the external source;
a processor to:
receive the input from the external source or local source;
determine an output of the logic equations based on the input from one or more of the external source, the local source, or locally calculated logic equations;
set the one or more access control variables based on the output of the logic equations;
receive an access control command that requests a change in the access level of the IED;
compare a text input from the EA HMI to the password; and
enable the access control command to proceed or prevent the access control command from proceeding regardless of the maximum access level indicated by the maximum access setting based on the one or more access control variables and a result of the comparison of the test input from the EA HMI to the password.