H.9
Date Code 20170814
Instruction Manual
SEL-700G Relay
Synchrophasors
Serial Port Settings for IEEE C37.118 Synchrophasors
The SEL-700G automatically sets the TREA1–TREA4 or PMTRIG Relay
Word bits based on their default SEL
OGIC
control equation. To change the
operation of these bits they must be programmed.
You can use these bits to send various messages at a low bandwidth via the
synchrophasor message stream. You can also use Digital Status Words to send
binary information directly, without the need to manage the coding of the
trigger reason messages in SEL
OGIC
.
Use these Trigger Reason bits if your synchrophasor system design requires
these bits. The SEL-700G synchrophasor processing and protocol
transmission are not affected by the status of these bits.
IRIGC
Defines if IEEE C37.118 control bit extensions are in use. Control bit
extensions contain information such as Leap Second, UTC time, Daylight
Savings Time, and Time Quality. When your satellite-synchronized clock
provides these extensions your relay is able to adjust the synchrophasor time
stamp accordingly.
➤
IRIGC := NONE ignores bit extensions
➤
IRIGC := C37.118 extracts bit extensions and corrects
synchrophasor time accordingly
Serial Port Settings for IEEE C37.118 Synchrophasors
IEEE C37.118 compliant synchrophasors are available via serial or Ethernet
port. The associated serial port settings are shown in Table H.5.
The serial port settings for PROTO := PMU, shown in Table H.5, do not
include the settings BITS and PARITY; these two settings are internally fixed
as BITS := 8, PARITY := N.
Serial port setting PROTO cannot be set to PMU (see Table H.5) when Global
setting EPMU := N. Synchrophasors must be enabled (EPMU := Y) before
PROTO can be set to PMU.
If you use a computer terminal session or
AC
SEL
ERATOR
QuickSet SEL-5030
Software connected to a serial port, and then set that same serial port PROTO
setting to PMU, you lose the ability to communicate with the relay through
ASCII commands. If this happens, either connect via another serial port (that
has PROTO := SEL) or use the front-panel HMI SET/SHOW screen to change
the port PROTO setting back to SEL.
Table H.5
SEL-700G
Serial Port Settings for Synchrophasors
Setting
Description
Default
PROTO
Protocol (SEL, MOD, DNET, DNP,
EVMSG, PMU, MBA, MBB, MB8A,
MB8B, MBTA, MBTB)
a
a
Some of the other PROTO setting choices may not be available.
SEL
b
b
Set PROTO = PMU to enable C37.118 synchrophasor protocol on this port.
SPEED
Data Speed (300 to 38400)
9600
STOPBIT
Stop Bits (1, 2)
1
RTSCTS
HDWR HANDSHAKING (Y, N)
N
Summary of Contents for SEL-700G Series
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