Schweitzer Engineering Laboratories SEL-387E - Serial Port Protocols; Dnp3; Sel; SEL Distributed Port Switch Protocol (LMD)

Date Code 20080110 Communications 7-9
SEL-387E Instruction Manual
The communications protocol consists of hardware and software features.
Serial Port Protocols
SEL
Set the serial port PROTO setting to SEL (PROTO = SEL) to access the following protocols,
which are described in more detail later in this section.
• ASCII
• Compressed ASCII
• Fast Meter
• Fast Operate
• Fast SER (Unsolicited Sequential Events Recorder (SER) Protocol)
SEL Distributed Port Switch Protocol (LMD)
The SEL Distributed Port Switch Protocol (PROTO = LMD) permits multiple SEL relays to
share a common communications channel. See Appendix C: SEL Distributed Port Switch
Protocol (LMD) for more information. The same protocols are available as when PROTO =
SEL.
DNP3
Set the serial port PORT setting to DNP (PROTO = DNP) to enable the Distributed Network
Protocol (DNP3) protocol, which meets DNP3 Level 2 requirements. See Appendix G:
Distributed Network Protocols (DNP3) for more information.
Ethernet Protocols
As with other communications interfaces, you must chose a data exchange protocol that operates
over the Ethernet network link in order to exchange data. The relay supports FTP, Telnet, Ping,
and IEC 61850 protocols.
You should carefully design your Ethernet network to maximize reliability, minimize system
administration effort, and provide adequate security. Work with a networking professional to
design your substation Ethernet network.
FTP Server
Use the single FTP (File Transfer Protocol) session to access the following files:
CFG.XML Configuration read-only file in XML format
ERR.TXT Error read-only file in text format
SET_61850.CID IEC 61850 CID read-write file
.s19 Firmware upgrade write-only file