7.18
SEL-787 Relay Instruction Manual Date Code 20150130
Communications
SEL ASCII Protocol and Commands
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, 2ACCESS, and CAL)
The ACC, 2AC, and CAL commands (see Table 7.7) provide entry to the
multiple access levels. Different commands are available at the different
access levels, as shown in the SEL-787 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:
Because the password is not disabled, the relay prompts you for the Access
Level 1 password:
The relay is shipped with the default Access Level 1 password shown in
PASSWORD Command (Change Passwords) on page 7.33. At the prompt,
enter the default password and press the <Enter> key. The relay responds
with the following:
Table 7.7 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
CAL Moves from Access Level 2 to Access Level C. 2
=ACC <Enter>
Password: ?
[RID Setting] Date: mm/dd/yyyy Time: hh:mm:ss
[TID Setting] Time Source: external
Level 1
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