GE LPS-O Instruction Manual page 256

12.1 INTRODUCTION
Communication using the ASCII protocol presents oscillography data as directly readable ASCII characters.
Oscillography data may contain 12 to 72 power cycles of data. Each power cycle contains 64 samples of data.
The data structure of a sample is as shown in Table 12–2: OSCILLOGRAPHY DATA STRUCTURE. Each sam-
ple appears on a separate line.
Table 12–2: OSCILLOGRAPHY DATA STRUCTURE
12
Item
Sample No
Ia
Ib
Ic
Va
Vb
Vc
Digital Flags
Table 12–3: ASCII COMMAND LIST
ASCII Command Description
Command
Mnemonic
LOGIN Login to the relay
QUIT Logs out from the relay,
displays the relay status,
and returns the privilege
level to VIEW for the relay
port used.
PASSword Change the passwords
used by LPSO-Link and
ASCII; MMI passwords are
not affected by this
command
12-
2
Data Format
(ASCII characters)
decimal integer
signed decimal (resolution of 0.01 units)
signed decimal
signed decimal
signed decimal (resolution of 0.1 units)
signed decimal
signed decimal
Eight 4 byte hexadecimal integers
(Sheet 1 of 7)
Lowest
Level
Password
Needed
NONE
VIEW
Level equal
to the
password
being
changed
LPS-O Line Protection Relay
12 ASCII COMMUNICATIONS
Description
Sample number within the cycle
Inst. current in Phase A
Inst. current in Phase B
Inst. current in Phase C
Inst. voltage in Phase A
Inst. voltage in Phase B
Inst. voltage in Phase C
The 252 digital flags represent system
status
Relay Prompt
Unit ID?
Password?
Reports the access level granted or that the
password entered is INVALID
Press ENTER to continue
Do you want to logout?
You have logged out from the relay
Enter Current Password
Enter New Password
Re-enter New Password
Password changed or INVALID; password not
changed
User Response
Relay ID
number; up to 10
character
password
Press the enter
key; Y or N
old password;
new password;
new password
GE Power Management