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Introduction
2 Manual Documentation Number: ES1A -2907m pn7041-rev002
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Communication Modes
ES1A Ethernet to RS-232 converters allow you to connect serial devices
over a LAN or WAN. Serial devices no longer are limited to a physical
connection to the PC COM port. They can be installed anywhere on the LAN
using TCP/IP or UDP/IP communications. This allows traditional Windows
PC software access to serial devices anywhere on the LAN/WAN network.
Direct IP
Direct IP Mode allows applications using TCP/IP or UDP/IP socket
programs to communicate with the asynchronous serial ports on the serial
server. In this mode the ES1A is configured as a TCP or UDP server. The
socket program running on the PC establishes a communication connection.
The data is sent directly to and from the serial port on the server.
TCP Server Mode allows network devices to initiate a TCP connection to
the serial device connected to the serial port on the ES1A. This is also
referred to as reverse telnet.
UDP Server Mode allows network devices to initiate a UDP connection to
the serial device attached to the serial port of the ES1A. When using UDP
protocol the ES1A can be configured to broadcast data to and receive data
from multiple IP addresses.
Virtual COM Port
Virtual COM Port mode (also called RealPort, or com port redirection)
allows you to map a COM port on your PC to the serial port on your ES1A.
Using the RealPort software (included with the ES1A) you create virtual
COM ports on your PC. When your application sends data to this port,
RealPort redirects the data across the network to serial device connected to
the ES1A serial port. The network is transparent to the user application and
the serial device connected to the ES1A.
Paired Mode
Paired Mode (also called Serial Tunneling or Serial Bridge mode) allows
serial devices connected to two ES1A converters to communicate across a
network. The two ES1A converters automatically connect to each other.
In Paired Mode the heartbeat feature ensures reliable communications by
restoring the connection if communications are temporarily lost at either end
due to loss of power or Ethernet connection.