A.2
SEL-421 Relay Instruction Manual Date Code 20171021
Firmware, ICD File, and Manual Versions
Firmware
Revision History
Table A.1 lists the firmware versions, revision descriptions, and corresponding
instruction manual date codes.
Table A.1 Firmware Revision History (Sheet 1 of 7)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
SEL-421-4-R323-V0-Z024013-D20171008
SEL-421-5-R323-V0-Z024013-D20171008
➤ Added a new analog quantity, PTPMCC, to indicate the clock class of
the PTP master.
➤ Enhanced memory read diagnostics.
➤ DNP3 data are now reported with a LOCAL_FORCED flag when they
have been overridden through use of the TEST DB2 command.
➤ Updated IEC 61850 protocol implementation to IEC 61850 Edition 2.
➤ Modified the relay response to an MMS identify request so that it will
respond with the firmware ID (FID) string.
➤ Improved MMS file services performance with successive file transfers.
➤ Enhanced wild card parsing used in MMS file transfer operations.
➤ Modified the ID command to display a string that uniquely identifies the
IEC 61850 firmware present in the relay.
➤ Modified firmware to replace non-printable characters with question
marks in settings that are sent to the front panel of the HMI.
➤ Modified firmware to allow SNTPPIP to be set to 0.0.0.0 when
ESNTP = BROADCAST.
20171008
➤ The ETH command now shows both MAC addresses.
➤ Modified firmware to indicate an enabled or disable transition of the
IEC 61850 Buffer Report Control Block (BRCB) by sending an over-
flow flag on the next report sent after the transition.
➤ Modified IEEE-1588 PTP power profile to be supported in Parallel
Redundancy Protocol (PRP) mode.
➤ Modified firmware to only reset breaker monitor data for the breaker
selected. In prior firmware, some data were being reset for all breakers.
➤ Modified firmware to avoid false GOOSE out of sequence errors while
in PRP mode.
➤ Modified firmware to use only the first synchrophasor data configura-
tion if the number of output data configurations exceeds the number of
data configurations.
➤ Modified firmware to allow all settings changes when the relay is dis-
abled.
SEL-421-4-R322-V3-Z024013-D20171021
SEL-421-5-R322-V3-Z024013-D20171021
Includes all the functions of SEL-421-4-R322-V2-Z024013-D20170810
and SEL-421-5-R322-V2-Z024013-D20170820 with the following
addition:
➤ Enhanced memory read diagnostics.
20171021
SEL-421-4-R322-V2-Z024013-D20170810
SEL-421-5-R322-V2-Z024013-D20170810
Includes all the functions of SEL-421-4-R322-V1-Z024013-D20170525
and SEL-421-5-R322-V1-Z024013-D20170525 with the following addi-
tion:
➤ Resolved an issue where certain Ethernet traffic could cause diagnostic
restarts.
20170810
SEL-421-4-R322-V1-Z024013-D20170525
SEL-421-5-R322-V1-Z024013-D20170525
Includes all the functions of SEL-421-4-R322-V0-Z024013-D20170327
and SEL-421-5-R322-V0-Z024013-D20170327 with the following addi-
tion:
➤ Modified firmware to allow the relay to synchronize to an external time
source more responsively.
20170525
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