8-8
Serial Port Communications and Commands
Date Code 20010731
SEL-352-1, -2 Instruction Manual
The CAN character (ASCII hex 18) aborts a pending transmission. This is useful in
terminating an unwanted transmission.
5. Control characters can be sent from most keyboards with the following keystrokes:
XON:
<CTRL>Q
(hold down the Control key and press Q)
XOFF:
<CTRL>S
(hold down the Control key and press S)
CAN:
<CTRL>X
(hold down the Control key and press X)
SEL Distributed Port Switch Protocol
The SEL Distributed Port Switch Protocol (LMD) permits multiple SEL relays to share a
common communications channel. The protocol is selected by setting the SET P setting
PROTOCOL = LMD. See
Appendix C: SEL Distributed Port Switch Protocol (LMD)
for more
information on Distributed Port Switch Protocol (LMD).
SEL Distributed Network Protocol (SEL-352-2 Relay Only)
SEL Distributed Network Protocol (DNP) meets DNP 3.00 Level 2 requirements. Select the
protocol by setting
PROTOCOL = DNP
, a SET P setting. See
Appendix G: Distributed
Network Protocol (DNP) 3.00
for more information.
SEL
Fast Meter
Protocol
SEL
Fast Meter
protocol supports binary messages to transfer metering messages. SEL
Fast
Meter
protocol is always available on any serial port. The protocol is described in
Appendix D:
Configuration, Fast Meter, and Fast Operate Commands
.
SEL
Fast Operate
Protocol
SEL
Fast Operate
protocol supports binary messages to control Relay Word bits. SEL
Fast
Operate
protocol is available on any serial port. It may be turned off by setting the SET P
setting FAST_OP=N. The protocol is described in
Appendix D: Configuration, Fast Meter, and
Fast Operate Commands
.
SEL Compressed ASCII Protocol
SEL Compressed ASCII protocol provides compressed versions of some of the relay ASCII
commands. SEL Compressed ASCII protocol is always available on any serial port. The
protocol is described in
Appendix E: Compressed ASCII Commands
.
Содержание SEL-352-1
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