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MODEM COMMUNICATION TO ABB RELAYS
The COM PORT Selection menu must be used to select the PC computer port through which RCP will
issue commands. In the sample case, the PC used has only one com port "1'". The selections for the
communication port parameters are shown on the bottom right hand side of the communication screen.
One must now select the previously configured file for operation. Simultaneously depress the "ALT" and
"S" keys on the keypad to select the Substation Screen as illustrated in Figure 23. Highlight the "SELECT
SUBSTATION" selection. The screen as shown in Figure 30 will be presented. As illustrated, the file
REL350md .sub is available for selection. Depress the right arrow key "→" twice to select the file
(highlighted as shown) and depress the enter key. Depress the enter key again to select the REL350
description of the intended IED to be attached.
Finally, one must initiate communications with the relay. Depress the alternate "C" keys simultaneously to
view the menu as illustrated in Figure 26. Highlight the "INITIATE" selection and depress the enter key to
display the dial out query shown in Figure 31.
Notice that the dial out telephone number is visible. Depress the "Y" key on the keyboard to initiate
communications. One should notice a black screen as illustrated in Figure 32 which follows. Once the
modem connects end to end, one will be prompted to depress the enter key to return to the main screen
as shown in Figure 22. One may then proceed to the "RELAY COMMANDS" menu to query the relay for
information. The modem is configured to operate the speaker (there is a volume control on the left hand
side of the modem as one faces the front of the modem) until connection occurs.
Figure 30. Substation File Selection Screen
Page 22 of 47
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