B&B Electronics ESR902 User Manual

4 

Chapter 1 

Manual Documentation Number: ESR90x-0508m 

B&B Electronics Mfg Co Inc – 707 Dayton Rd - 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 

Two 

 are connected to a network, one configured as a TCP or 

UDP client and the other as a TCP/UDP server. When setting up the server 
the remote IP address section must contain the address of the client. This will 
allow the client’s IP address to pass the IP address-filtering feature of the 
server. Conversely, the Remote IP address of the client must contain the 
server’s IP address. Both communication port numbers must be the same.  

The 

 protocol connection provides a reliable communications 

connection in 

 or with

 

. 

This feature restores the connection 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 intervention. 
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 five seconds until communications is established again. The 
Heart Beat feature is available for use in 

 

 and 

 

. This is not available when using a UDP application.