P.3.311
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
87L Communications Report
(i) 87L status Information used: E87L setting; Relay Word bits 87MTR, 87SLV, 87LST, 87TEST, 87CH-
pOK, and ESTUB.
If E87L = N, then
DISABLED is displayed. Otherwise, all the following lines that apply are
displayed, one item per line, and in the following order (some items are mutually exclusive):
NOT AVAILABLE will be displayed for any of the following:
if 87LST Relay Word bit asserted,
if either the HALARM or SALARM are asserted—unavailable because of a hardware or
software problem,
if either the 87ERR1 OR 87ERR2 are asserted—unavailable because of 87L Watchdog
logic,
if the 87BLOCK is asserted—blocked by user logic,
if 87TFB = 1 AND 87CHpFB asserted for any active channel—unavailable because of
Time Fallback logic,
if 87BLK is asserted and 87BLKL is not asserted—blocked by a remote relay.
MASTER if 87MTR Relay Word bit asserted
SLAVE if 87SLV Relay Word bit asserted
IN STUB BUS if ESTUB Relay Word bit asserted
IN TEST if 87TEST Relay Word bit asserted
(j) 87L channel status 87CHpAL Relay Word bit used; displayed for required channels only (those with 87CHpRQ
RWB asserted); blank if none of the required channels has an alarm asserted, or channels with
alarms asserted are listed as:
ALARM ON CHANNEL x
ALARM ON CHANNELS x AND y
ALARM ON CHANNELS x, y, AND z
(k) 87L data synchronization
method
Only for applications over serial channels (based on the E87CH setting).
Channel-based if all active channels (those with 87CHpAC Relay Word bits asserted)
have their 87CHpSN settings equal to C.
External-time-based if all active channels (those with 87CHpAC Relay Word bits
asserted) have their 87CHpSN settings equal to T.
Channel and time based otherwise.
(l) 87L data synchronization
status
Only for applications over serial channels (based on the E87CH setting).
High precision (if 87SYNH Relay Word bits asserted), Low precision (if 87SYNL
Relay Word bit asserted), or
NOT SYNCHRONIZED (neither of the two Relay Word bits
asserted).
(m) 87L time source status For applications over serial channels, displayed only if any of the required channels (87CH-
pRQ asserted) is set to use time for synchronization (87CHpSN setting equals “T”). Always
displayed for applications over Ethernet.
Local Status:
Locked or UNLOCKED based on the 87TOK Relay Word bit).
Remote Status:
Locked or UNLOCKED based on the received ETL bits for each required and receiving
channel using time-based synchronization (87CHpRQ & 87CHpOK & 87CHpSN = T).
Suppressed if any required time-based channel is not receiving or the relay is set to chan-
nel-based synchronization (E87CHpSN = C). If all required, time-based channels are
receiving, then the status is
Locked if ETL of all required, receiving, time-based channels
is 1, otherwise the status is
UNLOCKED.
(n) 87L time fallback method
and status
Displayed only for applications over serial channels (based on the E87CH setting). Sup-
pressed if 87L data synchronization method is channel-based or in the 3SS application.
Method:
87TFB setting used for the configured method; displayed
Mode x, where x is the value of
the 87TFB setting.
Status:
(87CHpFB & 87CHpRQ) ORed for all active channels (87CHpAC asserted) is used. Dis-
played
OK or IN FALLBACK.
(o) Channel status 87CHpAL Relay Word bits used. If 87CHpAL = 1, displayed
ALARM, otherwise OK.
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 2 of 4)
Data Item Description
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