Table of Contents
Advertisement
I.L. 40-386.3
4. 6.
COMMUNICATION PORT(S) USE
4.6.1
Introduction
REL 301/302 can be communicated with for target data, settings, etc., through the
man-machine interface (MMI), The relay can also be communicated with via one of the
communication (comm.) ports. Comm port communications, provides the user with
more information than is available with the MMI. For example, all 16 targets are avail-
able and a more friendly user interface for settings can be accessed (all settings are
displayed on a single screen on the user's PC). This section will provide the details of
the comm port options, personal computer requirements, connecting cables and all in-
formation necessary to communicate with and extract data from the relay. Additional
communications details are contained in IL 40-603, (RCP) Remote Communication
Program.
4.6.2
Communication Port Options
REL 301/302 is supplied with a rear communications port. If the network interface is
not specified, a RS-232C (hardware standard) communications port is supplied. Net-
work interface comm. port option allows the connection of the relay with many other
devices to a 2-wire network. A detailed discussion of networking capabilities can be
found in AD 40-600, Substation Control and Communications Application Guide.
RS-232C, rear comm. ports are of the removable, Product Operated Network Interface
(PONI) type and are available in two styles. One is identified by a 25 pin (DB-25S) fe-
male connector, it is usually black and has a single data comm. rate of 1200 bps. The
second style is identified by a 9 pin (DB-9P) male connector and externally accessible
dip switches (next to the connector) for setting the communication data rate. This port
option is always black in color, can be set for speeds of 300, 1200, 2400, 4800, or 9600
bps and offers an option for IRIG-B time clock, synchronization input.
Front communications is another comm. port option. The front panel RS-232C com-
munications port, is supplied with a 9 pin (DB-9S) female connector and can be con-
figured for 300, 1200, 2400, 2400, 4800, 9600, or 19200 bps. Data comm. rate choice
is made by dip switch settings which will be discussed later in this chapter.
4.6.3
Personal Computer Requirements
Communication with the relay requires the use of Remote Communication Program
(RCP) regardless of the comm. port option. RCP is supplied by ABB Relay Division and
is run on a personal computer (PC).
To run the program requires an IBM AT, PC/2 PC or true compatible with a minimum
of 640 kilobytes of RAM, 1 hard disk drive, a RS-232C comm. port and a video graphics
adapter card. The PC must be running Version 3.3, or higher, MS-DOS.
4.6.4
Connecting Cables
With each comm. port option the connecting cable requirement can be different. Also,
connecting directly to a PC or connecting to a modem, for remote communication, af-
fects the connecting cable requirements. Table 4-5 provides a summary of a plug pin
assignments, pins required and cable connectors.
4-8
(10/94)
Advertisement
Table of Contents
