Schweitzer Engineering SEL-351P - Section 10: Serial Port Communications and Commands; Serial Port Default Settings (for All Ports); Wake-Up Port Default Settings

Date Code 990215 Serial Port Communications and Commands 10-1
SEL-351P Manual Técnico
SECTION 10: SERIAL PORT COMMUNICATIONS AND
COMMANDS
I NTRODUCTION
The SEL-351P Recloser Control comes equipped with three EIA-232 serial ports and an optional
EIA-485 4-wire serial port, if ordered. Serial Port 1 (EIA-485, 4-wire), Serial Port 2 (EIA-232),
and Serial Port 3 (EIA-232) are located on the side panel of the recloser controller. Serial Port F
(EIA-232) is located on the front panel.
Connect any of the SEL-351P serial ports to a computer serial port for local communication or to
a modem for remote communication. Other devices useful for communications include the SEL-
PRTU Port Switch and the SEL-2020 Communications Processor. You can use a variety of
terminal emulation programs on your personal computer to communicate with the SEL-351P.
Examples of PC-based terminal emulation programs include: ProComm Plus™, Relay Gold™,
Microsoft Windows
®
Terminal™, Smartcom™, and Crosstalk™. Typically, VT-100 terminal
emulation provides the best display.
Serial Port Default Settings (for all ports)
Baud Rate = 2400
Data Bits = 8
Parity = N
Stop Bits = 1
RTS/CTS = N
To change the port settings, use the Access Level 2 SET P command (see Section 9: Setting the
SEL-351P Recloser Control) or the front-panel SET pushbutton.
Wake-Up Port Default Settings
The wake-up port on the side panel is used to wake-up the SEL-351P by remote means (e.g.,
radio), after it puts itself to sleep to conserve battery energy during a long outage. Two global
settings are made for the wake-up port with the SET G command (Access Level 2 command;
default settings shown):
ABAUD = 2400 (Wake-up port baud rate [1200 – 38400])
CHWAKE = ABCD (Wake-up message [4 characters])
Data Bits = 8 (fixed setting)
Parity = N (fixed setting)
Stop Bits = 1 (fixed setting)
When the SEL-351P receives the wake-up character string (setting CHWAKE), the SEL-351P
wakes up and resumes its protection and control functions. See the Battery System Monitor
subsection in Section 8: Breaker/Recloser Monitor, Battery System Monitor, Metering, and
Load Profile Functions for more information on the SEL-351P putting itself to sleep and the
means to wake it up.