Sel 751A - Access Commands (ACCESS and 2 ACCESS); Command Explanations; Password Requirements; Table 7.6 Access Commands

7.17
Date Code 20100129 Instruction Manual SEL-751A Relay
Communications
SEL ASCII Protocol and Commands
Command
Explanations
This section lists ASCII commands alphabetically. Commands, command
options, and command variables to enter are shown in bold. Lowercase italic
letters and words in a command represent command variables that are
determined based on the application. For example, time t = 1 to 30 seconds,
remote bit number n = 01 to 32, and level.
Command options appear with brief explanations about the command
function. Refer to the references listed with the commands for more
information on the control function corresponding to the command or
examples of the control response to the command.
You can simplify the task of entering commands by shortening any ASCII
command to the first three characters; 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 control 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 ACC <Enter>.
Tables in this section show the access level(s) where the command or
command option is active. Access levels in this device are Access Level 0,
Access Level 1, and Access Level 2.
Access Commands (ACCESS and 2ACCESS)
The ACC and 2AC commands (see Table 7.6) provide entry to the multiple
access levels. Different commands are available at the different access levels,
as shown in the SEL-751A Relay Command Summary at the end of this
manual. Commands ACC and 2AC are explained together because they
operate similarly. See Access Levels on page 7.15 for a discussion of placing
the relay in an access level.
Password Requirements
Passwords are required unless they are disabled. See PASSWORD Command
(Change Passwords) on page 7.33 for the list of default passwords and for
more information on changing and disabling passwords.
Access Level Attempt (Password Required). Assume the following
conditions:
➤ Access Level 1 password is not disabled.
➤ Access Level is 0.
At the Access Level 0 prompt, enter the ACC command:
=ACC <Enter>
Table 7.6 Access Commands
Command Description Access Level
ACC Moves from Access Level 0 to Access Level 1. 0
2AC Moves from Access Level 1 to Access Level 2. 1