P.3.312
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
87L Communications Report
(p) Medium/protocol E87CH setting and part number used.
For applications over Ethernet:
10/100BASE-T, y, or
100BASE-FX, y,
where y is either Primary or Secondary.
For applications over serial channels, the serial port hardware type associated with each
active channel displayed, one of:
EIA-422
G.703
850nm C37.94 Fiber
1300nm Fiber
1550nm Fiber
1300nm C37.94 Fiber
For the 2SD application, appended “, y,” where y is one of “2SD Primary” or “2SD Standby”,
based on the 87PCH setting (primary if displayed channel matches 87PCH, standby if it does not).
(q) Remote relay ID Display "OK" if the remote ID matches the 87RpADR setting. Display "REMOTE ID MIS-
MATCH: x" where x is the received ID. If the ID cannot be determined, suppress output.
Show only for applications over serial (based on E87CH setting).
(r) Channel time status
Locked or UNLOCKED based on the received ETL bit for each required and receiving channel
using time-based synchronization (87CHpRQ & 87CHpOK & 87CHpSN = T). Suppressed
for any channel if not required or if not receiving.
(s) Channel application (role) 87CHpAC, 87CHpRQ, and 87CHpOK Relay Word bits used, as follows:
Available = 87CHpAC, 87CHpOK, and !87CHpRQ
In use = 87CHpRQ
Failed = 87CHpAC and !87CHpOK
(t) Channel application
(role)—continued
For 2SD applications only. 87PCH setting used to generate the display value as follows:
Primary = (87PCH == p)
Standby = ("87PCH <> p)
(u) Channel alarm—receiving
or not
87CHpOK Relay Word bit used.
ALARM or OK displayed.
(v) Channel alarm—lost packet
alarm
87CHpLP Relay Word bit used. Lost packet count above the user's permissible level. Dis-
played
ALARM or OK. Suppressed if the alarm is not enabled (87CHpPC setting is OFF).
(w) Channel synchronization
method—configured and
presently used
For applications over serial channels, the 87CHpSN setting is used for the configured
method: Channel-based or Ext-time-based. In applications over Ethernet,
Ext-time-based
displayed for all active channels.
Presently Used:
For applications over serial, 87CHpCS, 87CHpTS, and 87CHpNS Relay Word bits used:
Channel-based, Ext-time-based, or NOT SYNCHED. In applications over Ethernet,
Ext-time-based or NOT SYNCHED displayed. Suppressed the presently applied
method for any channel if not receiving (!87CHpOK).
(x) Channel synchronization
accuracy
87CHpHS and 87CHpLS Relay Word bits used. Suppressed for any channel not receiving
(!87CHpOK).
High precision, Low precision, or NOT SYNCHED displayed.
(y) Channel alarm—channel
latency (round-trip time)
exceeds user specification
87CHpT Relay Word bits used.
ALARM or OK displayed. Suppressed for any channel if the
alarm is not enabled (the 87CHpMT setting is OFF) or if not receiving on this channel
(!87CHpOK). Only for applications over serial channels.
(z) Channel alarm—asymmet-
rical channel
87CHpAM Relay Word bits used.
ALARM or OK displayed. Suppressed for any channel if
asymmetry cannot be measured (!(87TOK & ETLp)), or if the alarm is not enabled (the
87CHpMA setting is OFF). Only for applications over time-based synchronized serial chan-
nels; suppressed if not receiving on this channel (!87CHpOK).
(aa) Channel measurement—
round-trip delay
87CHpRT value used (round-trip channel delay [ms]). Suppressed if !87CHpOK. Only for
applications over serial channels (based on the E87CH setting).
(bb) Channel measurement—
delay in the transmit direc-
tion
87CHpTXT (transmit channel delay [ms]) used. Suppressed if !87CHpOK or
!(87TOK&ETLp).
Ta b l e 3.1 6 4 CO M 87 L Re p o r t Da t a I te m s (Sheet 3 of 4)
Data Item Description
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