4-10 L30 Line Current Differential System GE Multilin4.2 EXTENDED ENERVISTA UR SETUP FEATURES 4 HUMAN INTERFACES4The following window is displayed.Figure 4–10: TYPICAL SETTINGS FILE PROPERTIES WINDOW3. Enter the serial number of the L30 device to lock to the settings file in the Serial # Lock field.The settings file and corresponding secure FlexLogic™ equations are now locked to the L30 device specified by the serialnumber.4.2.3 SETTINGS FILE TRACEABILITYA traceability feature for settings files allows the user to quickly determine if the settings in a L30 device have beenchanged since the time of installation from a settings file. When a settings file is transfered to a L30 device, the date, time,and serial number of the L30 are sent back to EnerVista UR Setup and added to the settings file on the local PC. This infor-mation can be compared with the L30 actual values at any later date to determine if security has been compromised.The traceability information is only included in the settings file if a complete settings file is either transferred to the L30device or obtained from the L30 device. Any partial settings transfers by way of drag and drop do not add the traceabilityinformation to the settings file.Figure 4–11: SETTINGS FILE TRACEABILITY MECHANISMWith respect to the above diagram, the traceability feature is used as follows.2The serial number and last setting change dateare stored in the UR-series device.The serial number of the UR-series device and the file transferdate are added to the settings file when settings filesare transferred to the device.842864A1.CDRCompare transfer dates in the settings file and theUR-series device to determine if securityhas been compromised.1 SETTINGS FILE TRANSFERREDTO UR-SERIES DEVICESERIAL NUMBER AND TRANSFER DATESENT BACK TO ENERVISTA ANDADDED TO SETTINGS FILE.
