GE Power ManagementL90 Line Differential Relay4-14 HUMAN INTERFACES 4.1 URPC® SOFTWARE INTERFACE44 HUMAN INTERFACES 4.1 URPC® SOFTWARE INTERFACE 4.1.1 GRAPHICAL USER INTERFACEThe URPC software provides a graphical user interface (GUI) as one of two human interfaces to a UR device. The alter-nate human interface is implemented via the device’s faceplate keypad and display (see FACEPLATE INTERFACE sectionin this chapter).URPC provides a single facility to configure, monitor, maintain, and trouble-shoot the operation of relay functions, con-nected over local or wide area communication networks. It can be used while disconnected (i.e. off-line) or connected (i.e.on-line) to a UR device. In off-line mode, settings files can be created for eventual downloading to the device. In on-linemode, you can communicate with the device in real-time.The URPC software, provided with every L90 relay, can be run from any computer supporting Microsoft Windows® 95, 98,or NT. This chapter provides a summary of the basic URPC software interface features. The URPC Help file providesdetails for getting started and using the URPC software interface.4.1.2 CREATING A SITE LISTTo start using the URPC program, a Site List must first be created. See the instructions in the URPC Help program underthe topic “Creating a Site List”.4.1.3 URPC® SOFTWARE OVERVIEWa) ENGAGING A COMMUNICATING DEVICEThe URPC software may be used in on-line mode (relay connected) to directly communicate with a UR relay. Communicat-ing relays are organized and grouped by communication interfaces and into sites. Sites may contain any number of relaysselected from the UR product series.b) USING SETTINGS FILESThe URPC software interface supports three ways of handling changes to relay settings:• In off-line mode (relay disconnected) to create or edit relay settings files for later download to communicating relays.• While connected to a communicating relay to directly modify any relay settings via relay data view windows, and thensave the settings to the relay.• You can create/edit settings files and then write them to the relay while the interface is connected to the relay.Settings files are organized on the basis of file names assigned by the user. A settings file contains data pertaining to thefollowing types of relay settings:• Device Definition• Product Setup• System Setup• FlexLogic™• Grouped Elements• Control Elements• Inputs/Outputs• TestingFactory default values are supplied and can be restored after any changes.c) CREATING / EDITING FLEXLOGIC™ EQUATIONSYou can create or edit a FlexLogic™ equation in order to customize the relay. You can subsequently view the automaticallygenerated logic diagram.d) VIEWING ACTUAL VALUESYou can view real-time relay data such as input/output status and measured parameters.
