4–4 745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
HARDWARE INTERFACE CHAPTER 4: INTERFACES
4.1.5 Program Port
Use the front panel program port for RS232 communications with the 745. As described in
RS232 Front Panel Program Port on page 3–19, all that is required is a connection between
the relay and a computer running EnerVista 745 Setup. For continuous monitoring of
multiple relays, use the COM1 RS485/RS422 port or the COM2 RS485 port.
4.1.6 Keypad
4.1.6.1 Description
The 745 display messages are organized into main menus, pages, and sub-pages. There
are three main menus labeled setpoints, actual values, and target messages.
Pressing the MENU key followed by the MESSAGE DOWN key scrolls through the three main
menu headers, which appear in sequence as follows:
Pressing the MESSAGE RIGHT or ENTER key from these main menu pages will display the
corresponding menu page. Use the MESSAGE keys to scroll through the page headers.
When the display shows
SETPOINTS, pressing the MESSAGE RIGHT or ENTER key will display
the page headers of programmable parameters (referred to as setpoints in the manual).
When the display shows ACTUAL VALUES, pressing the MESSAGE RIGHT or ENTER key
displays the page headers of measured parameters (referred to as actual values in the
manual). When the display shows TARGET MESSAGES, pressing the MESSAGE RIGHT or
ENTER key displays the page headers of event messages or alarm conditions.
Each page is broken down further into logical sub-pages. The MESSAGE keys are used to
navigate through the sub-pages. A summary of the setpoints and actual values can be
found in the chapters 5 and 6, respectively.
The ENTER key is dual purpose. It is used to enter the sub-pages and to store altered
setpoint values into memory to complete the change. The MESSAGE RIGHT key can also be
used to enter sub-pages but not to store altered setpoints.
The ESCAPE key is also dual purpose. It is used to exit the sub-pages and to cancel a
setpoint change. The MESSAGE LEFT key can also be used to exit sub-pages and to cancel
setpoint changes.
The VALUE keys are used to scroll through the possible choices of an enumerated setpoint.
They also decrement and increment numerical setpoints. Numerical setpoints may also be
entered through the numeric keypad.
The RESET key resets any latched conditions that are not presently active. This includes
resetting latched output relays, latched Trip LEDs, breaker operation failure, and trip coil
failure.
SETPOINTS []
ACTUAL VALUES []
TARGET MESSAGES []
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