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12 ASCII COMMUNICATIONS
12 ASCII COMMUNICATIONS 12.1 INTRODUCTION
The LPS-D has a built-in ASCII interface which can communicate using any standard terminal emulator. The
user must initiate all commands by typing them. Some of the commands have abbreviations which are repre-
sented by the capital letters in a command. If there are no lower case letters in a command, the command
does not have an abbreviation and the whole command must be typed.
Any keypad operation can also be performed through the ASCII communications interface. The communica-
tions passwords apply to the ASCII interface and must be used to gain the necessary privilege level. If the
passwords are not known or forgotten, they are available from the Keypad using the INF key.
Once the terminal emulator has been started, the COM port the relay or modem is connected to must be setup
to match the relay for bits (8), parity (none), stop bits (1) and Xon/Xoff flow control.
Once the terminal emulator is ready and the relay connected, press the [ENT] key. The standard error mes-
sage should appear. If it does not, check the connections and settings. All the commands that follow can then
be used. Use your ASCII communications program to save relay responses to a file.
1. When a prompt says "Press", this indicates that as soon as that key is pressed the relay will respond with-
out the user pressing the ENTER key. When a prompt says "Enter", the entered keystrokes will not be pro-
cessed until the ENTER key is pressed.
2. The CAPITAL letters in a command name must be typed to execute the command. The lowercase letters
that continue the command are optional. For any command to be executed the ENTER must be pressed.
3. If a mistake is made while entering commands, a message will be displayed and the correct information
can be entered after the prompt at the end of the error message. No action that will cause the relay to
change settings, operate a breaker, or change the relay operation in any way will be done without user ver-
ification (for example: TRIP BREAKER 1, are you sure (Y/N): ?).
4. The relay responses below are in order of appearance. Where there is a user choice, all possible
responses may not be listed. However, any unlisted responses will be similar to others listed.
5. Help is available before typing a command by typing HELP at he LPS_xxx> prompt and pressing the
ENTER key. Some commands have built-in help as well.
6. There are two kinds of command prompts. The colon (:) is used to indicate the relay is not logged in and is
waiting for the LOGIN command. After a successful login, the prompt changes to depending on the privi-
lege level. See Table 12–1: ASCII PROMPTS.
Table 12–1: ASCII PROMPTS
PRIVELEGE LEVEL
VIEW
ACTIONS
SETTINGS
MASTER
GE Power Management
PROMPT
LPS_INF>
LPS_ACT>
LPS_SET>
LPS_MST>
LPS-D Line Protection System
12.1 INTRODUCTION
12.1.1 DESCRIPTION
12.1.2 ASCII INTERFACE
12-
1
12
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