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MODEM COMMUNICATION TO ABB RELAYS
One must configure a substation file for the REL350 connection.
Depress the Alternate key and S
simultaneously to enter the Substation menu and depress the down arrow " ↓ " once to select
" New
Substation File" menu selection as illustrated in Figure 23.
Figure 23. New Substation Setup Screen
A file must be configured for the REL350 connection. Since a PONI R card is not addressable, it is
considered a point to point device.
As illustrated in Figure 24, one must pick an option for the
configuration. In our example (as shown in the topology of Figure 20), although the REL350 is networked
through a modem, the connection is still point to point, one must select the selection "1" to allow correct
connectivity. Figure 24 illustrates the screen queries and answers for this specific example.
As illustrated in Figure 25, the operator must supply additional configuration data. Figure 25 lists the
configuration responses for this example. Configuration data to be supplied is as such:
RELAY TYPE – in this case selection 5 (REL350) is selected.
DEVICE DESCRIPTION – This field is used only for documentation purposes.
LOGON SEQUENCE – In this example, the ATDT command is used for a pulse tone telephone system.
Also in this example, an analog system is used and an additional prefix of "9" must be dialed to access
the external public telephone system, the comma "," is used to insert a delay before dialing the telephone
number of the remote location (where the REL350 resides). In this instance, the substation is located in a
telephone overlay area where the area code must be dialed with the main number. Additionally, since the
remote modem is resident at an analog extension, several commas "," are added to create a delay for the
phone line to transfer to that extension and then synchronize with the remote modem. A query is
generated to accept the configuration and a request for the file name to store the information is then
requested (without the operating system file extension).
Page 18 of 47
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