4-16 “Job Done” Examples - (Example 1) Date Code 20010518
SEL-2020 Instruction Manual
Re-establish transparent communications with the relay and verify that the date matches the
date in the SEL-2020. Use the DATE command to change the date and year in the relay
(DATE MM/DD/YY); exit transparent communication and issue the TOGGLE command
again. Enter transparent communication and again verify that the date matches the date in
the SEL-2020. If the date does not match, exit transparent communication and double-check
the SEL-2020 MESG1 setting to make sure that the message string exactly matches the string
in the SET A example shown earlier.
5. Check modem communication.
Have someone call the phone number of the telephone line connected to the SEL-2020
modem. The modem should answer by the fourth ring. The caller’s communication program
should be set for an 8-bit word, no parity, and 2 stop bits. Any baud rate can be used, up to
the maximum baud rate of the caller’s modem or 14400 baud, whichever is greater.
The remote caller can enter transparent communication with any of the relays attached to the
SEL-2020 using the PORT command, just as you did earlier. You can monitor the
communication using the LEDs on the SEL-2020 front panel and using the STATUS
command. The STATUS screen shows the ports that are in transparent communication and
the port number they are in transparent communication with. For instance, if Port 8 is in
transparent communication with Port 1, the status of Port 8 will show TRANS1, and the
status of Port 1 will show TRANS8.
The remote caller should use the same procedure to quit transparent communication as he or
she did earlier. If, for some reason, remote communication is cut off before the remote caller
quits transparent communication, the TIMEOUT on the SEL-2020 modem port will
disconnect transparent communication automatically in 30 minutes.
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