Sel 421 - Page 37

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Date Code 20090715 SEL-421 Relay
Preface
Conventions
Commands
You can simplify the task of entering commands by shortening any ASCII
command to the first three characters (upper- or lowercase); for example,
ACCESS becomes ACC.
Always send a carriage return <CR> character, or a carriage return character
followed by a line feed character <CR><LF>, to command the relay to
process the ASCII command. Usually, most terminals and terminal programs
interpret the <Enter> key as a <CR>. For example, to send the ACCESS
command, type the following:
ACC <Enter>
Numbers
This manual displays numbers as decimal values. Hexadecimal numbers
include the letter h appended to the number. Alternatively, the prefix 0X can
also indicate a hexadecimal number. For instance, 11 is the decimal number
eleven, but 11h and 0X11 are hexadecimal representations of the decimal
value seventeen.
Safety Information
This manual uses three kinds of hazard statements, formatted as follows:
Indicates a potentially hazardous
situation that, if not avoided, may
result in minor or moderate injury or
equipment damage.
!
CAUTION
Indicates a potentially hazardous
situation that, if not avoided, may
result in minor or moderate injury or
equipment damage.
!
CAUTION
Indicates a potentially hazardous
situation that, if not avoided, could
result in death or serious injury.
!
WARNING
Indicates a potentially hazardous
situation that, if not avoided, could
result in death or serious injury.
!
WARNING
Indicates an imminently hazardous
situation that, if not avoided, will
result in death or serious injury.
!
DANGER
Courtesy of NationalSwitchgear.com