Sel 751A - Table 4.55 Rear-Panel Serial Port (EIA-232) Settings; Table 4.56 Rear-Panel Serial Port (EIA-232;EIA-485) Settings

To Next Page

To Previous Page

4.110

SEL-751A Relay Instruction Manual Date Code 20100129

Protection and Logic Functions

Port Settings (SET P Command)

PORT 3

PORT 4

Set the speed, data bits, parity, and stop bits settings to match the serial port

configuration of the equipment that is communicating with the serial port.

After Port Timeout minutes of inactivity on a serial port at Access Level 2, the

port automatically returns to Access Level 0. This security feature helps

prevent unauthorized access to the relay settings if the relay is accidentally left

in Access Level 2. If you do not want the port to time out, set Port Timeout

equal to 0 minutes.

Table 4.55 Rear-Panel Serial Port (EIA-232) Settings

Setting Prompt Setting Range

Setting Name :=

Factory Defau lt

PROTOCOL SEL, DNP, MOD,

EVMSG, PMU, MBA,

MBB, MB8A, MB8B,

MBTA, MBTB

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 SLAVE ID 1–247 SLAVEID := 1

NOTE: For additional settings when

PROTO := MBxx, see Ta bl e I .5 as well

as M

IRRORED BITS Transmit SELOGIC

Equations on page SET.24.

For additional settings when

PROTO := DNP, see Table D.7 for a

complete list of the DNP3 session

settings.

Table 4.56 Rear-Panel Serial Port (EIA-232/EIA-485) Settings

Setting Prompt Setting Range

Setting Name := Factory

Default

PROTOCOL SEL, MOD, DNET,

DNP, EVMSG, PMU,

MBA, MBB, MB8A,

MB8B, MBTA,

MBTB