Sel 551 - Page 117

Date _______________
Date Code 20110408 Instruction Manual SEL-551 Relay
SET.11 of 12Settings Sheets for the SEL-551 Relay
Sequential Events Recorder Settings (SET R Command)
Other Rear Port Settings
Timeout (0–30 minutes)
[PROTOCOL = SEL or LMD only]
TIMEOUT =
Send Auto Messages to Port (Y, N)
[PROTOCOL = SEL or LMD only]
AUTO =
Enable Hardware Handshaking (Y, N)
[PROTOCOL = SEL only]
RTS_CTS =
Fast Operate Enable (Y, N)
[PROTOCOL = SEL or LMD only]
FAS T_ OP =
Protocol Settings
Set PROTOCOL = SEL for standard SEL ASCII protocol.
Set PROTOCOL = LMD for SEL Distributed Port Switch protocol.
Set PROTOCOL = MOD for Modbus
®
RTU protocol.
Refer to Appendix C: SEL Distributed Port Switch Protocol for details on the LMD protocol.
Refer to Appendix G: Modbus RTU Communications Protocol for details on Modbus.
Other Port Settings
Set TIMEOUT to the number of seconds of serial port inactivity for an automatic log out. Set TIMEOUT = 0 for
no port time-out.
Set AUTO = Y to allow automatic messages at the serial port.
Set RTS_CTS = Y to enable hardware handshaking. With RTS_CTS = Y, the relay will not send characters until
the CTS input is asserted. Also, if the relay is unable to receive characters, it deasserts the RTS line. Setting
RTS_CTS is not applicable for EIA-485 serial port option.
Set FAST_OP = Y to enable binary Fast Operate messages at the serial port. Set FAST_OP = N to block binary
Fast Operate messages. Refer to Appendix D: Configuration, Fast Meter, and Fast Operate Commands for the
description of the SEL-551 Fast Operate commands.
Sequential Events Recorder Settings (SET R Command)
NOTE: Sequential Events Recorder settings consist of three trigger lists. Each trigger list can include
up to 24 Relay Word bits delimited by spaces or commas. See Sequential Events Recorder (SER)
Event Report on page 7.8.
NOTE: Relay Word bits for the SEL-551 in Row 13 of Ta ble 4.5 cannot be used in the following SER
settings.
SER Trigger List 1
SER1 =
SER Trigger List 2
SER2 =
SER Trigger List 3
SER3 =