Schweitzer Engineering Laboratories SEL-2020 - Page 93

Date Code 20010518 “Job Done” Examples - (Example 1) 4-11
SEL-2020 Instruction Manual
6. Use SET P to set Port 8 as a modem port.
Your screen should appear similar to the following:
*>>SET P 8<ENTER>
SET P 8<ENTER>SET P 8<ENTER>
SET P 8<ENTER>
Port communications settings for Port 8
Device Type (U=Unused, S=SEL IED, 0=Other IED,
P=Printer, M=Master) Device = M ? <ENTER>
<ENTER><ENTER>
<ENTER>
Communications Type (S=SEL, L=LMD) PROTOCOL = S ? <ENTER>
<ENTER><ENTER>
<ENTER>
Enable Fast Operate commands on this port (Y/N)FAST_OP = N ? <ENTER>
<ENTER><ENTER>
<ENTER>
Port Identification String
PORTID =""
? MODEM<ENTER>
MODEM<ENTER>MODEM<ENTER>
MODEM<ENTER>
Modem Settings
Start-up String
MSTR ="ATX0E0&D0%E1S0=4"
? <ENTER>
<ENTER><ENTER>
<ENTER>
Communications Settings
Baud Rate (300, 600, 1200, 2400, 4800, 9600,
19200, 38400) BAUD = 9600 ? 38400<ENTER>
38400<ENTER>38400<ENTER>
38400<ENTER>
Number data bits (7,8) DATABIT = 8 ? <ENTER>
<ENTER><ENTER>
<ENTER>
Stop Bits (1,2) STOPBIT = 2 ? <ENTER>
<ENTER><ENTER>
<ENTER>
Parity (N,O,E,1,0) PARITY = N ? <ENTER>
<ENTER><ENTER>
<ENTER>
Enable RTS/CTS handshaking (Y/N) RTS_CTS = N ? <ENTER>
<ENTER><ENTER>
<ENTER>
Enable XON/XOFF flow control (Y/N) XON_XOFF= Y ? <ENTER>
<ENTER><ENTER>
<ENTER>
Port Timeout in minutes (0.0-30.0) TIMEOUT = 5.0 ? 30 <ENTER>
30 <ENTER>30 <ENTER>
30 <ENTER>
(continued on next page)
Notes:

Leave Fast Operate commands disabled for this example. See Appendix H: SEL-2020
Configuration and Fast Operate Commands for a complete discussion of these
commands.
Enter “MODEM” or some other description to identify the port as a modem port.
!
Accept the default modem startup initialization string for the SEL-2020 internal modem.
See Appendix B: Optional Internal Modem Information for a complete description of
modem settings.
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The default baud rate for all rear ports is 9600. Set the baud rate to 38400 baud to take
full advantage of the internal modem’s 14400 maximum baud rate. When you call the
substation from a remote location, the modem on your PC and the SEL-2020 internal
modem will negotiate the highest possible baud rate, up to the 14400 baud maximum rate
of the SEL-2020 internal modem if your PC has a modem capable of the same or higher
baud rate.

!
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