Sel 2414 - Communications Protocols; Hardware Flow Control; Protocols

7.4
SEL-2414 Transformer Monitor Instruction Manual Date Code 20130214
Communications
Communications Protocols
Communications Protocols
Hardware
Flow Control
All EIA-232 serial ports support RTS/CTS hardware handshaking (hardware
flow control).
Protocols
A rich collection of protocols is available with the Transformer Monitor; how-
ever, not all protocols are available on all ports.
Port Setting Effect
RTSCTS := N Disables hardware handshaking.
Permanently asserts the RTS line.
RTSCTS := Y Deasserts RTS when unable to receive characters.
Blocks character transmission until the CTS input is asserted.
Table 7.5 Serial Port Protocols
Protocol Description
SEL Communications Protocols
SEL ASCII Use this protocol to send ASCII commands and receive ASCII responses that are human
readable with an appropriate terminal emulation program.
Compressed ASCII This protocol provides compressed versions of some of the ASCII commands. See Appendix C:
SEL Communications Processors for details.
Fast Meter This protocol supports binary messages to transfer metering and digital element messages.
Fast Operate This protocol supports binary messages to transfer operation messages.
Fast SER This protocol is used to receive binary Sequential Events Recorder unsolicited responses.
Fast Message Read This protocol uses binary messages to transmit data to an SEL Communications Processor. See
Appendix C: SEL Communications Processors for details.
Fast Message Unsolicited Write This protocol uses binary messages to receive data from an SEL Communications Processor.
See Appendix C: SEL Communications Processors for details.
Other SEL Communications Protocols
MIRRORED BITS
®
This protocol is a direct device-to-device (peer to peer) communications protocol that allows
IEDs to exchange information quickly, securely, and with minimal expense for functions such
as intertripping, remote control and remote sensing. See Appendix G: Mirrored Bits
Communications for details.
Event Messenger This protocol supports transmitting messages to SEL
-3010 Event Messenger. See Table 6.14 on
page 6.13 for details.
Industry Standard Communications Protocols
Modbus
®
Modbus is a simple manufacturer-developed, hardware independent communications protocol.
See Appendix E: Modbus Communications.
DNP3 DNP3 is an object-oriented manufacturer-developed, hardware independent communications
protocol. See Appendix D: DNP3 Communications.