Documentation Number: ESP902-2303 Manual
Chapter 1
3
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Heart Beat
The Heart Beat protocol connection provides a reliable communications
connection in Virtual COM port mode or with
paired (tunneling)
mode. This
feature restores the connections if communications are temporarily lost at
either end due to loss of power or Ethernet connection.
Without this feature a device that loses a connection and stops
communicating would not be able to reconnect without human attention to
correct the problem. A TCP data connection can be lost when there is a power
failure or temporary loss of an Ethernet connection on either the client or
server.
If a loss occurs the Heart Beat feature will try to reconnect the TCP data
connection every 5 seconds until communications is established again. The
Heart Beat feature is available for use with the Virtual COM port mode and
Paired Connection mode. This is not available when using a UDP application.
Quick Start
This section lists the steps needed to start using the ESP902.
Please familiarize yourself with the connections, indicators and switches
before beginning. See Hardware Chapter 2.
There are three ways to configure the ESP902 for your network and serial
devices: We recommend the first unless not using a Windows operating
system.
1. Ethernet connection using the VLINX ESP Manager under Windows.
2. Ethernet connection using the Telnet VT100 Terminal software.
3. RS-232 connection in Console mode using VT100 Terminal software.
The ESP902 can be configured on your network or connected directly to the
Ethernet port on your computer using an Ethernet crossover cable. Use the
ESP Manager with Windows or use Telnet for configuration without Windows.
We recommend using the ESP Manager.
With Console configuration, a RS-232 Crossover (null modem DTE/DTE)
cable is usually needed, the ESP902 ports are configured DTE for RS-232.
Set the mode switches to Console mode, (SW 1-ON, SW 2 - ON, SW 3 ON)
before configuration.
