A.5
Date Code 20170927 Instruction Manual SEL-751 Relay
Firmware, ICD, and Manual Versions
Firmware
SEL-751-R110-V0-Z005001-D20150410 ➤ Lowered the minimum value for definite-time overcurrent elements
from 0.5 A to 0.25 A for 5 A relays and from 0.1 A to 0.05 A for 1 A relays.
20150410
➤ Expanded the setting range for inverse-time overcurrent elements.
Lowered the minimum value from 0.5 A to 0.25 A for 5 A relays and
from 0.1 A to 0.05 A for 1 A relays. Increased the maximum value to
24 A from 16 A for 5 A relays and to 4.8 A from 3.20 A for 1 A relays.
➤ Added setting choices C1–C4 to reclose enable setting E79. When
C1–C4 options are selected, the reclosing relay does not go to the
lockout state upon reclose supervision failure. Instead, the reclosing relay
increments the shot counter and starts timing on the next open interval.
➤ Modified the firmware to reset virtual bits when a new CID file is sent
to the relay.
➤ Resolved an issue with the relay becoming unresponsive on power-up
when the NETPORT setting was set to D in dual Ethernet models with
the NETMODE setting set to FIXED or FAILOVER.
SEL-751-R109-V0-Z004001-D20140402
➤ Increased the maximum event report length to 180 cycles. 20140402
➤ Addressed an issue in relays with the optional Arc Sense technology
with R106 or R108 firmware that could prevent retrieval of event
reports after executing the CEV HIF command.
➤ Addressed an issue with setting the IP address of more than one DNP
session to 0.0.0.0. The relay now allows only one DNP session with
the IP address 0.0.0.0.
SEL-751-R108-V0-Z003001-D20131218
➤ Fixed LCD display contrast and backlight issues present in firmware
revision R106 only.
20131218
➤ Fixed Telnet and Modbus/TCP multiple session availability issue
present in firmware revision R106 only.
SEL-751-R106-V0-Z003001-D20131101
➤ Added logical nodes to the IEC 61850 ICD file. 20131101
➤ Modified default Dataset and Report Names in the IEC 61850 ICD file.
➤ Corrected an Ethernet Failover Switching issue for dual Ethernet models.
➤ Corrected an issue with the PREDLY setting. RTS is now forced high
and CTS is ignored when PERDLY setting is OFF to power certain
fiber-optic transceivers.
➤ Corrected an issue with either premature or infinite timeout when a
Telnet session is opened without subsequently sending any characters.
➤ Corrected an issue with port timeout when accessing fast protocol data
over Telnet without sending any ASCII characters regularly to keep
the connection alive.
➤ Corrected an issue with receiving packets from a previous connection
on a new Modbus connection when the device is being polled at a rate
of 20 ms or faster (polling at high speed).
➤ Improved the security of RTD ALARM and TRIP by adding an
approximately 6-second delay to qualify the event.
➤ Corrected an Ethernet issue with the initial Gratuitous ARP request not
being sent for as long as five minutes after startup.
➤ Added support for Y-MODEM over Telnet.
➤ Corrected an issue with writing to User Map registers 1–125 with
Modbus function code 06.
➤ Corrected an issue with DNP Binary Outputs reported as OFFLINE.
➤ Corrected an issue with angle calculations for analog quantities.
Table A.2 R100 Series Firmware Revision History (Sheet 3 of 5)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
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