Schweitzer Engineering Laboratories SEL-751 - Table 4.88 Rear-Panel Serial Port (EIA-232;EIA-485) Settings

4.192
SEL-751 Relay Instruction Manual Date Code 20170927
Protection and Logic Functions
Port Settings (SET P Command)
PORT 4
The EPORT and MAXACC settings provide users with access controls for the
corresponding port. Setting EPORT to N disables the port and hides the
remaining port settings. The MAXACC setting selects the highest access level
for the port.
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 pre-
vent 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.
Set PROTO := SEL (standard SEL ASCII protocol), MOD (Modbus RTU pro-
tocol), or one of the M
IRRORED BITS protocols, as necessary for your applica-
tion. For detailed information, refer to Appendix C: SEL Communications
Processors, Appendix E: Modbus RTU Communications, Appendix F: IEC
HDWR HANDSHAKING Y, N RTSCTS := N
LANGUAGE ENGLISH, SPANISH LANG :=
ENGLISH
SEND AUTOMESSAGE Y, N AUTO := N
FAST OP MESSAGES Y, N FASTOP := N
MODBUS SLAVE ID 1–247 SLAVEID := 1
Table 4.87 Rear-Panel Serial Port (EIA-232) Settings (Sheet 2 of 2)
Setting Prompt Setting Range
Setting Name :=
Factory Default
Table 4.88 Rear-Panel Serial Port (EIA-232/EIA-485) Settings
Setting Prompt Setting Range
Setting Name :=
Fac to ry Default
ENABLE PORT Y, N EPORT := Y
PROTOCOL SEL, MOD, DNET, DNP,
EVMSG, PMU, MBA, MBB,
MB8A, MB8B, MBTA, MBTB,
103
PROTO := SEL
MAXIMUM ACCESS
LEVEL
1, 2, C MAXACC := 2
COMM INTERFACE 232, 485 COMMINF := 232
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
HDWR HANDSHAKING Y, N RTSCTS := N
LANGUAGE ENGLISH, SPANISH LANG := ENGLISH
SEND AUTOMESSAGE Y, N AUTO := N
FAST OP MESSAGES Y, N FASTOP := N
MODBUS SLAVE ID 1–247 SLAVEID := 1
NOTE: For additional settings when
PROTO := MBxx, see Table J.5 as well
as M
IRRORED BITS Transmit SELOGIC
Control Equations.
For additional settings when
PROTO := DNP, see Table D.7 for a
complete list of the DNP3 session
settings.
Refer to Appendix G: IEC 60870-5-103
Communications for more information
on IEC 60870-6-103.