9328900990 Rev L BE1-951 ASCII Command Interface 11-1
SECTION 11 • ASCII COMMAND INTERFACE
INTRODUCTION
Relay and power system information can be retrieved from a remote location using the ASCII command
interface. The ASCII command interface is also used to enter settings, retrieve reports and metering
information, and perform control operations. A communication port on the relay front panel provides a
temporary, local interface for communication. Communication ports on the rear panel provide a
permanent communication interface.
Front and rear panel communication ports can be connected to computers, terminals, serial printers,
modems and intermediate communication/control interfaces such as RS-232 serial multiplexors. BE1-951
communication protocols support ASCII and binary data transmissions. ASCII data is used to send and
receive human readable data and commands. Binary data is used for computer communication and
transmission of raw oscillographic fault data if available.
Modbus™, DNP, and other common protocols are also available. Available communication protocol
instruction manuals include 9328900991 for Modbus™, and 9328900992 for DNP 3.0. For information
about other protocols, consult your Basler Electric Representative.
SERIAL PORT
Communication connections consist of two Data Communication Equipment (DCE) RS-232 ports, one
RS-485 port, and an IRIG port. BE1-951 communication protocol is compatible with readily available
modem/terminal software. If required, password protection provides security against unauthorized
operation. Detailed information about making communication connections is provided in Section 12,
Installation. Communications port setup is covered in this section. Security settings are covered in
Section 9, Security.
RS-232 Ports
Two female RS-232 (DB-9) connectors are provided. One port is located on the front panel and is
designated COM0. Another port is located on the rear panel and is designated COM1. Both ports support
full-duplex operation. Polled operation is possible at the rear port using a simple RS-232 splitter if a
polling address is programmed for COM1.
RS-485 Port
RS-485 terminal block connections are located on the rear panel and designated COM2. This port
supports half-duplex, multi-drop operation. Multi-drop (polled mode) operation is possible if a polling
address is programmed for the port.
ASCII COMMAND INTERFACE
A computer terminal or PC running terminal emulation software can be used at any of the three serial
ports to send commands to the relay. Simple ASCII command language is used to communicate with the
relay. When the relay receives a command, it responds with the appropriate action. ASCII commands can
be used in human to machine interactions and in batch download type operations.
NOTE
HyperTerminal as shipped with Windows® 98, either first or second edition,
cannot be used for communications with the relay due to a problem introduced in
the Windows® 98 version of HyperTerminal. The software bug is associated with
the carriage return/line feed function when acting as a terminal emulator. An
upgrade to HyperTerminal that fixes the problem is available from the Microsoft's
source of HyperTerminal (Hilgraeve Inc.) at www.hilgraeve.com. The upgrade is
referred to as "HyperTerminal-Private Edition." Companies that download and
use this software must review the terms and conditions associated with the use
of the software.
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