10.10
SEL-734 Meter Instruction Manual Date Code 20090730
Communications
Communications Protocols
Control characters can be sent from most keyboards with the following
keystrokes:
SEL Distributed Port Switch Protocol (LMD)
The SEL Distributed Port Switch Protocol (LMD) permits multiple SEL
meters to share a common communications channel. The protocol is selected
by setting the port setting PROTO = LMD. See Appendix B: SEL Distributed
Port Switch Protocol (LMD) for more information on SEL Distributed Port
Switch Protocol (LMD).
SEL Fast Meter Protocol
SEL Fast Meter protocol supports binary messages to transfer metering and
control messages. This protocol is described in Appendix C: SEL
Communications Processors.
SEL Compressed ASCII Protocol
SEL Compressed ASCII protocol provides compressed versions of some of
the meter ASCII commands. This protocol is described in Appendix C: SEL
Communications Processors.
MV-90 Translation
The meter provides MV-90 support via the Modbus map. The Modbus
protocol is described in Appendix F: Modbus RTU Communications Protocol.
Modbus
RTU
The meter provides Modbus RTU support. The Modbus protocol is described
in Appendix F: Modbus RTU Communications Protocol.
MIRRORED BITS Communications
The SEL-734 Meter supports MIRRORED BITS meter-to-meter
communications on two ports simultaneously. See Appendix G: M
IRRORED
B
ITS Communications.
Distributed Network Protocol (DNP3)
The meter provides Distributed Network Protocol (DNP3) Level 2 Slave
support. DNP is an optional protocol and is described in Appendix E:
Distributed Network Protocol.
Telnet
The SEL-734 provides Telnet support via the Ethernet port (PORT 1). The meter
supports a total of three simultaneous sessions on this port (see Ethernet on
page 10.4).
XON: <Ctrl+Q>
XOFF: <Ctrl+S>
CAN: <Ctrl+X>
Courtesy of NationalSwitchgear.com
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