Digital Counters; Selector Switches - GE L90 Instruction Manual

STATUS
CHANNEL 1(2) STATUS
element is enabled and data is being received from the remote terminal; If the value is "FAIL," the 87L element is enabled
and data is not being received from the remote terminal. If "n/a," the 87L element is disabled.
CHANNEL 1(2) LOST PACKETS
rate of two packets per cycle. The number of lost packets represents data packets lost in transmission; this count can be
reset through the
COMMANDS  CLEAR RECORDS
CHANNEL 1(2) LOCAL LOOPBACK STATUS
CHANNEL 1(2) REMOTE LOOPBACK STATUS
CHANNEL 1(2) LOOP DELAY
computed during a remote loopback test under normal relay operation, in milliseconds (ms).
CHNL 1(2) ASYMMETRY
channels if
CHANNEL ASYMMETRY
is less than the delay in the receiving direction; a negative "–" sign indicates that the transit delay in the transmitting
direction is more than the delay in the receiving direction. A displayed value of "0.0" indicates that either asymmetry is not
present or cannot be estimated due to failure with local/remote GPS clock source.
VALIDITY OF CHANNEL CONFIGURATION
validity, displays here. If a remote relay ID number does not match the programmed number at the local relay, the "FAIL"
value displays. The "n/a" value appears if the local relay ID is set to a default value of "0" or if the 87L element is disabled.
See the
SETTINGS  SYSTEM SETUP  POWER SYSTEM
— This value represents the status of the phase and frequency locked loop (PFLL) filter that uses timing
PFLL STATUS
information from local and remote terminals to synchronize the clocks of all terminals. If
all terminals are synchronized and 87L protection is enabled. If it is "FAIL," the clocks of all terminals are not synchronized
and 87L protection is disabled. At startup, the clocks of all terminals are not synchronized and the PFLL status displays as
"FAIL." It takes up to eight seconds after startup for the value to change from "FAIL" to "OK." When the status is "n/a," then
PFLL is disabled.

6.3.12 Digital counters

6
ACTUAL VALUES  STATUS  DIGITAL COUNTERS  DIGITAL COUNTERS Counter 1(8)
 DIGITAL COUNTERS
 Counter 1
The present status of the eight digital counters displays here. The status of each counter, with the user-defined counter
name, includes the accumulated and frozen counts (the count units label also appears). Also included, is the date and time
stamp for the frozen count. The

6.3.13 Selector switches

ACTUAL VALUES  STATUS  SELECTOR SWITCHES
 SELECTOR SWITCHES

6-8
— This represents the receiver status of each channel. If the value is "OK," the 87L current differential
— Current, timing, and control data is transmitted to the remote terminals in data packets at a
— The result of the local loopback test displays here.
— The result of the remote loopback test displays here.
— Displays the round trip channel delay (including loopback processing time of the remote relay)
— The result of channel asymmetry calculations derived from GPS signal displays here for both
is "Enabled". A positive "+" sign indicates that the transit delay in the transmitting direction
— The current state of the communications channel identification check, and hence
Counter 1

0
Counter 1 FROZEN:

0
Counter 1 FROZEN:

1970/01/01 00:00:00
Counter 1 MICROS:

0
COUNTER 1 MICROS
SELECTOR SWITCH 1

POSITION: 0/7
SELECTOR SWITCH 2

POSITION: 0/7
menu.
section for more information
ACCUM:
Range: YYYY/MM/DD HH:MM:SS
Range: 0 to 4294967295 in steps of 1
value refers to the microsecond portion of the time stamp.
Range: Current Position / 7
Range: Current Position / 7
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: ACTUAL VALUES
is "OK," the clocks of
PFLL STATUS