4.94
SEL-787 Relay Instruction Manual Date Code 20150130
Protection and Logic Functions
Port Settings (SET P Command)
Time-Synchronization
Source
The SEL-787 accepts a demodulated IRIG-B time signal. Table 4.44 shows
the setting to identify the input for the signal. Set TIME_SRC := IRIG1 when
you use relay terminals B01/B02 or EIA-232 serial Port 3 for the time signal
input. When you use fiber-optic Port 2 for the signal, set the TIME_SRC := IRIG2.
Refer to IRIG-B Time-Code Input on page 2.20 and IRIG-B on page 7.5 for
additional information.
Port Settings (SET P Command)
The SEL-787 provides settings that allow you to configure the parameters for
the communications ports. See Section 2: Installation for a detailed
description of port connections. On the base unit: Port F (front panel) is an
EIA-232 port; Port 1 is an optional Ethernet port(s); Port 2 is a fiber-optic serial
port; and Port 3 (rear) is optionally an EIA-232 or EIA-485 port. On the
optional communications card, you can select Port 4 as either EIA-485 or
EIA-232 (not both) with the COMMINF setting. See Table 4.45 through
Table 4.49 for the serial port settings, also see appropriate Appendix for
additional information on the protocol (DNP, MODBUS, IEC-61850,
DeviceNet, Synchrophasors, and M
IRRORED BIT) of interest.
PORT F
Table 4.44 Time-Synchronization Source Setting
Setting Prompt Setting Range
Setting Name :=
Factory Defa ul t
IRIG TIME SOURCE IRIG1, IRIG2 TIME_SRC := IRIG1
Table 4.45 Front-Panel Serial Port Settings
Setting Prompt Setting Range
Setting Name :=
Factory Default
PROTOCOL SEL, MOD,
EVMSG, PMU
PROTO := SEL
SPEED 300–38400 bps SPEED := 9600
DATA BITS 7, 8 bits BITS := 8
PARITY O, E, N PARITY := N
STOP BITS 1, 2 bits STOP := 1
HDWR HANDSHAKING Y, N RTSCTS := N
PORT TIME-OUT 0–30 min T_OUT := 5
SEND AUTOMESSAGE Y, N AUTO := N
MODBUS SLAVE ID 1–247 SLAVEID := 1