Date Code 20120126
Instruction Manual
SEL-2032 Communications Processor
Section 9
Protocols
Introduction
This section provides a detailed description of the protocols supported by the
SEL-2032 Communications Processor. The native command/response
handling is described in
Section 8: Serial Port Communications and
. This section describes the LMD Distributed Port Switch Protocol,
Fast Operate
Configuration and Commands, Modbus
®
RTU Protocol, and
DNP3 Protocol (Serial and Ethernet). All of these protocols apply to master
ports only; the SEL-2032 acts as a slave to these protocols.
SEL Fast Message Protocol
Overview
The SEL Fast Message protocol is a collection of SEL protocols including
Fast Meter, Fast Operate, Fast SER, and unsolicited tier-to-tier data transfer.
Configuration and operation of these protocols is completely automatic
between SEL devices. See SEL Application Guide AG95-10
Configuration
and Fast Meter Messages
for more information on Fast Messages. SEL offers
PC software that uses the SEL Fast Message protocol to communicate with
the SEL-2032. You can also obtain the details of the Fast Message protocol
from SEL and write software or configure devices to communicate with the
SEL-2032.
The Fast Message protocol is a binary protocol that the SEL-2032 can
interleave with an ASCII conversation. This means that when you connect a
single cable between the SEL-2032 and another SEL device, that cable carries
both an ASCII engineering or configuration conversation simultaneously with
a binary Fast Message conversation. This means that SCADA data collection
and control, for example, continue uninterrupted even when an engineer dials
into the substation to collect event data from one of the relays. This is an
important and powerful feature of the SEL-2032 and the Fast Message
protocol.
SEL IEDs and
the SEL-2032
When you connect SEL IEDs including SEL relays to the SEL-2032, you can
collect data from these devices without understanding the details of the Fast
Message protocol. When you configure the SEL-2032 port, you initiate a
process called auto-configuration. When the SEL-2032 performs an auto-
configuration, it automatically collects all of the information necessary to
support Fast Message communications with the attached device.
After you have performed an auto-configuration and completed SEL-2032
port configuration, perform an
AUTO
command on the SEL-2032 to
determine what Fast Message capabilities of the device are available.
shows an example of the
AUTO
command for a connected
SEL-387E Relay.
Summary of Contents for SEL-2032
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