9.40
SEL-2032
Communications Processor
Instruction Manual
Date Code 20120126
Protocols
Serial Distributed Network Protocol (Serial DNP3)
in the connected device. For example, an SEL-421 Relay provides SER data
with a –0/+2 ms accuracy and 1 ms time-stamp resolution and that data
becomes DNP3 events in the SEL-2032. This system also supports two-tier
SEL-2032 applications.
illustrates the flow of SER data.
Figure 9.4
SER Data Flow
For devices and data that do not support the SEL Fast SER protocol including
SEL equipment without an internal SER function, non-SEL equipment, and
analog data from any device, the SEL-2032 generates DNP3 event objects
(Object 2 and 32) by scanning the Port 16 User Region. This results in an
average time-stamp accuracy of approximately (–0/+0.25 seconds plus one-
half of the device polling time) for an overall approximate accuracy of –0/+1
second.
To determine if your SEL device supports the Fast SER protocol, consult the
Instruction Manual or connect the SEL device, perform an autoconfiguration
on the SEL-2032 port connected to the device, and issue the
AUTO
command.
For equipment that supports the Fast SER protocol, you will see Binary
Unsolicited listed under SER Support as shown in
SEL-2032
SEL
SEL
GPS Clock
SEL-421
SEL Relay
SCADA Master
SEL-2032
SEL-421
SEL Relay
Lower-Tier
Fast SER
Data
Relay
Fast SER
Data
DNP Events with
SER Quality
Timestamps
Local HMI Using
SEL Protocol Driver
Station-Wide
Fast SER
Data
2
3
1
SEL
. . .
. . .
Relay
Fast SER
Data
Summary of Contents for SEL-2032
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