Sel 411L - Table 15.100 PAS Level New_Password Command; Table 15.101 PAS Level DISABLE Command; Table 15.102 PING Command

P.15.40
SEL-411L Relay Protection Manual Date Code 20151029
ASCII Command Reference
Description of Commands
PAS level new_password
The relay changes the existing password for the specified access level to a
new_password that you specify when you issue the PAS level new_password
command.
Relay access levels that have passwords are 1, B, P, A, O, and 2. Valid
passwords are character sequences of as many as 12 characters. Valid
characters are any printable ASCII character. HMI password entry is limited
to upper- and lower-case letters, numbers, underscore, and period, so you must
limit your password to these characters if you need to do privileged operations
from the front panel.
All passwords are case sensitive. When you successfully enter a new
password, the relay pulses the Relay Word bit SALARM for one second, and
responds,
Set.
PAS level DISABLE
Issuing the PAS level DISABLE command disables password checking for
the specified access level. You must type DISABLE in upper case.
When you successfully disable password checking, the relay pulses the
SALARM Relay Word bit for one second, and responds,
Password Disabled.
SEL does not recommend disabling passwords.
PING
Use the PING command to determine whether the network is connected
properly and other network devices are reachable.
When the IP address parameter is not of a valid format, the relay responds
with
Invalid IP address. If the host device supports IP address aliasing,
then addr may be an alias. After valid PING command is issued, the relay
sends out an ICMP echo request message at a one second interval until
receiving a carriage return <CR> or five minutes elapses. A sample PING
command response is shown in Figure 15.6.
Table 15.100 PAS Level New_Password Command
Command
a
a
Parameter level represents the relay access levels 1, B, P, A, O, or 2.
Description Access Levels
PAS n Set a new password for Access Level n.2
WARNING
This device is shipped with default
passwords. Default passwords should
be changed to private passwords at
installation. Failure to change each
default password to a private
password may allow unauthorized
access. SEL shall not be responsible
for any damage resulting from
unauthorized access.
Table 15.101 PAS Level DISABLE Command
Command
a
a
Parameter level represents the relay access Levels 1, B, P, A, O, or 2.
Description Access Levels
PAS n DISABLE Disable password protection for the Access Level n.2
Table 15.102 PING Command
Command
a
a
IP address of device to ping in the format of four decimal numbers (0–255) separated by
periods.
Description Access Level
PING addr Send ICMP echo request messages to remote
device at addr.
1, B, P, A, O, 2