Date Code 20001006 Configuration, Fast Meter, and Fast Operate Commands D-1
SEL-351 Instruction Manual
APPENDIX D: CONFIGURATION, FAST METER, AND FAST
OPERATE COMMANDS
INTRODUCTION
SEL relays have two separate data streams that share the same serial port. The human data
communications with the relay consist of ASCII character commands and reports that are
intelligible to humans using a terminal or terminal emulation package. The binary data streams
can interrupt the ASCII data stream to obtain information and then allow the ASCII data stream to
continue. This mechanism allows a single communications channel to be used for ASCII commu-
nications (e.g., transmission of a long event report) interleaved with short bursts of binary data to
support fast acquisition of metering data. The device connected to the other end of the link requires
software that uses the separate data streams to exploit this feature. The binary commands and
ASCII commands can also be accessed by a device that does not interleave the data streams.
SEL Application Guide AG95-10, Configuration and Fast Meter Messages, is a comprehensive
description of the SEL binary messages. Below is a description of the messages provided in the
SEL-351 Relay.
MESSAGE LISTS
Binary Message List
Request to
Relay (hex) Response From Relay
A5C0 Relay Definition Block
A5C1 Fast Meter Configuration Block
A5D1 Fast Meter Data Block
A5C2 Demand Fast Meter Configuration Block
A5D2 Demand Fast Meter Data Message
A5C3 Peak Demand Fast Meter Configuration Block
A5D3 Peak Demand Fast Meter Data Message
A5B9 Fast Meter Status Acknowledge
A5CE Fast Operate Configuration Block
A5E0 Fast Operate Remote Bit Control
A5E3 Fast Operate Breaker Control
ASCII Configuration Message List
Request to
Relay (ASCII) Response From Relay
ID ASCII Firmware ID String and Terminal ID Setting (TID)
DNA ASCII Names of Relay Word bits
BNA ASCII Names of bits in the A5B9 Status Byte
Courtesy of NationalSwitchgear.com
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