4.41
Date Code 20080918 Instruction Manual SEL-749M Relay
Protection and Logic Functions
Port Settings (SET P Command)
Port Settings (SET P Command)
The SEL-749M provides settings that allow you to configure the parameters
for the communications ports. See Section 7: Communications for a detailed
description. The front-panel Serial Port F and the rear Port 3 consist of
EIA-232. The rear Port 4 consists of EIA-485 (Port 4A) or EIA-232 (Port 4C).
See Figure 2.3 for the rear-panel layout. Table 4.41 through Table 4.43 show
the serial port settings.
Port F
Port 3
Port 4
Table 4.41 Front-Panel Serial Port F Settings
Setting Prompt Setting Range Setting Name := Factory Default
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
PORT TIME-OUT 0–30 min T_OUT := 5
SEND AUTOMESSAGE Y, N AUTO := N
HDWR HANDSHAKING Y, N RTSCTS := N
Table 4.42 Rear-Panel Serial Port 3 Settings
Setting Prompt Setting Range Setting Name := Factory Default
PROTOCOL SEL, MOD 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
PORT TIMEOUT 0–30 min T_OUT := 5
SEND AUTOMESSAGE Y, N AUTO := N
HDWR HANDSHAKING Y, N RTSCTS := N
FAST OP MESSAGES Y, N FASTOP := N
MODBUS
a
SLAVE ID
a
The Modbus protocol is available at either Port 3 or Port 4, but not both.
1–248 SLAVEID := 1
Table 4.43 Rear-Panel Serial Port 4 Settings
Setting Prompt Setting Range Setting Name := Factory Default
COMM INTERFACE 232, 485 COMMINF := 485
PROTOCOL SEL, MOD PROTO := MOD
SPEED 300–38400 bps SPEED := 19200
DATA BITS 7, 8 bits BITS := 8
PARITY O, E, N PARITY := N
STOP BITS 1, 2 bits STOP := 2
PORT TIMEOUT 0–30 min T_OUT := 0
SEND AUTOMESSAGE Y, N AUTO := N
HDWR HANDSHAKING Y, N RTSCTS := N
FAST OP MESSAGES Y, N FASTOP := N
MODBUS
a
SLAVE ID
a
The Modbus protocol is available at either Port 3 or Port 4, but not both.
1–248 SLAVEID := 248
Courtesy of NationalSwitchgear.com
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