C.8
SEL-751A Relay Instruction Manual Date Code 20100129
SEL Communications Processors
SEL Communications Processor Example
Data Collection
The SEL communications processor is configured to collect data from the
SEL-751A, using the list in Table C.5.
Table C.6 shows the automessage (SET A) settings for the SEL
communications processor.
Table C.7 shows the map of regions in the SEL communications processor for
data collected from the SEL-751A. Use the MAP n command to view these
data.
Table C.5 SEL Communications Processor Data Collection Automessages
Message Data Collected
20METER Power system metering data
20DEMAND Demand metering data
20TARGET Selected Relay Word bit elements
20HISTORY History Command (ASCII)
20STATUS Status Command (ASCII)
20EVENTS Standard 4 sample/cycle event report (data with settings)
20EVENT Standard 4 sample/cycle event report (data only)
Table C.6 SEL Communications Processor Port 1 Automatic
Messaging Settings
Setting Name Setting Description
AUTOBUF Y Save unsolicited messages
STARTUP ACC\nOTTER\n Automatically log-in at Access Level 1
SEND_OPER Y Send Fast Operate messages
for remote bit and breaker bit control
REC_SER N Automatic sequential event recorder data collection
disabled
NOCONN NA No SEL
OGIC
®
control equation entered to
selectively block connections to this port
MSG_CNT 3 Three automessages
ISSUE1 P00:00:01.0 Issue Message 1 every second
MESG1 20METER Collect metering data
ISSUE2 P00:00:01.0 Issue Message 2 every second
MESG2 20TARGET Collect Relay Word bit data
ISSUE3 P00:01:00.0 Issue Message 3 every minute
MESG3 20DEMAND Collect demand metering data
ARCH_EN N Archive memory disabled
USER 0 No USER region registers reserved
Table C.7 SEL Communications Processor Port 1 Region Map
Region
Data Collection
Message Type
Region Name Description
D1 Binary METER Relay metering data
D2 Binary TARGET Relay Word bit data
D3 Binary DEMAND Demand meter data
D4–D8 n/a n/a Unused
A1–A3 n/a n/a Unused
USER n/a n/a Unused
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