1.10
SEL-751 Relay Instruction Manual Date Code 20170927
Introduction and Specifications
Getting Started
Establishing
Communication
The SEL-751 has three EIA-232 serial communications ports. The following
steps require PC terminal emulation software and an SEL Cable C234A (or
equivalent) to connect the SEL-751 to the PC. See Section 7: Communications
for further information on serial communications connections and the
necessary cable pinout.
Step 1. Connect the PC and the SEL-751 by using the serial
communications cable.
Step 2. Apply power to both the PC and the relay.
Step 3. Start the PC terminal emulation program.
Step 4. Set the PC terminal emulation program to the communications
port settings listed in the Default Value column of Table 1.5.
Also, set the terminal program to emulate either VT100 or
VT52 terminals.
Step 5. Press the <Enter> key on the PC keyboard to check the
communications link.
You will see the
= prompt at the left side of the computer screen
(column 1).
If you do not see the
= prompt, check the cable connections,
and confirm that the settings in the terminal emulation program
are the default values in Tabl e 1.5.
Step 6. Type QUIT <Enter> to view the relay report header.
You will see a computer screen display similar to Figure 1.3. If
you see jumbled characters, change the terminal emulation type
in the PC terminal emulation program.
Step 7. Type ACC <Enter> and the appropriate password (see
Table 7.34 for factory-default passwords) to go to Access
Level 1.
Step 8. Type QUIT <Enter> to view the relay report header.
Table 1.5 SEL-751 Serial Port Settings
Description Setting Label Default Value
SPEED SPEED 9600
DATA BITS BITS 8
PARITY PARITY N
STOP BITS STOP 1
PORT TIMEOUT T_OUT 5
HWDR HANDSHAKING RTSCTS N
=>QUIT <Enter>
Feeder xyz Date: 03/10/2011 Time: 10:31:43
Station 1 Time Source: Internal
=
Figure 1.3 Response Header