5.8
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
Message Strings
Modem Dial-Out Process
each unsolicited summary event report, use the user-defined command
20EVENTQ.) The number of reports left to read is visible in the Local region
of the port database.
These features can be used to collect and process event reports in a number of
ways. The following example illustrates collecting event reports and calling
them out when you do not have archive memory installed.
EXAMPLE 5.3 Collecting and Calling Out Event Reports
Consider a relay on Port 1 and modem on Port 8 with the following
settings:
SET U 1
CMD1=20EVENT
SET A 1
ISSUE3=CMD1*!8:D1
MESG3=20EVENT
SET A 8
ISSUE1=!1:D3
MESG1=“\IATDT15093321890/\F1:D3/”
Consider what happens when the relay triggers three event reports in
rapid succession. The 1:CMD1 bit triggers collection of an event
report. Because the SEL-2032 received three summary event
reports, the SEL-2032 collects the third event report. After the
SEL-2032 finishes collecting this event report, the modem initiates a
phone call and uploads the event report. Every 5 minutes, the
SEL-2032 retriggers the 1:CMD1 causing the next event report to be
collected and transferred via modem, until all three event reports
have been collected and transferred.
If the modem port is unsuccessful at initiating a phone call when the
next 1:CMD1 trigger occurs, the !8:D1 term in the event report
collection trigger equation prevents a new event report from being
read until the event report has been successfully transferred. The
1:CMD1 bit continues to retrigger every 5 minutes until all unread
event reports are collected.
Modem Dial-Out Process
The SEL-2032 can dial out to a remote PC, terminal, or IED through an
attached modem. This feature is useful to transfer data automatically from the
SEL-2032 database to a remote location or to acquire data from a remote
device. With the SET A command, set an ISSUEn message trigger to define
the condition that initiates the dial-out process, and set a MESGn to define the
message content and data.
The ISSUEn trigger condition can be based on time and/or day-of-week, or
any logic condition using global and local elements in the SEL-2032 database
collected from attached devices. The MESGn message string must begin with
a \I.../ special string sequence, followed by the data (or data request) and/or
data output strings, \R.../ or \F.../, that define the message to be sent.
The \I special string sequence initiates the dial-out process through the modem
using the provided dial string. For example \IATDT15093321890/ would dial
the SEL factory. The SEL-2032 will wait up to 60 seconds for a carrier signal
from the remote modem, which indicates the call has been completed. If a
carrier signal is not detected in 60 seconds, the SEL-2032 will hang-up and
wait 2 minutes before initiating a subsequent dial-out attempt. (Only two
Courtesy of NationalSwitchgear.com
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