iv
SEL-751A Relay
Instruction Manual
Date Code 20100129
Preface
Conventions
Appendix D: DNP3 Communications
.
Describes the DNP3 protocol support
provided by the SEL-751A.
Appendix E: Modbus RTU Communications
Describes the Modbus
®
protocol support provided by the SEL-751A.
Appendix F: IEC 61850 Communications
Describes IEC 61850
implementation in the SEL-751A.
Appendix G: DeviceNet Communications
Describes the use of DeviceNet
(data-link and application protocol) over CAN (hardware protocol).
.
Describes the Phasor Measurement Control
Unit (PMCU), and accessing Synchrophasor data via ASCII
Command (MET PM) and IEEE C37.118 Protocol.
Describes how SEL protective
relays and other devices can directly exchange information quietly,
securely, and with minimum cost.
Lists and describes the Relay Word bits
(outputs of protection and control elements).
Appendix K: Analog Quantities.
Lists and describes the Analog Quantities
(outputs of analog elements).
SEL-751A Relay Command Summary
Briefly describes the serial port
commands that are fully described in
Conventions
Typographic
Conventions
There are many ways to communicate with the SEL-751A. The three primary
methods are:
➤
Using a command line interface on a PC terminal emulation
window.
➤
Using the front-panel menus and pushbuttons.
➤
Using
AC
SEL
ERATOR
QuickSet.
The instructions in this manual indicate these options with specific font and
formatting attributes. The following table lists these conventions.
Typographic Conventions
Example
Description
STATUS
Commands typed at a command line interface on a PC.
<Enter>
Single keystroke on a PC keyboard.
<Ctrl+D>
Multiple/combination keystroke on a PC keyboard.
Start > Settings
PC dialog boxes and menu selections.
The > character indicates submenus.
{CLOSE}
Relay front-panel pushbuttons.
ENABLE
Relay front- or rear-panel labels.
Main > Meters
Relay front-panel LCD menus and relay responses.
The > character indicates submenus.
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