Rockwell Automation 1768-EWEB EtherNet/IP Web Server Module User Manual - Manual (Page 161)

Publication ENET-UM527E-EN-P - October 2006
Socket Interface 161
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Service Timeout parameter Make sure the Timeout parameter is sufficient for the service. Also make sure the Timeout
parameter is less than the MSG instruction timeout.
If the timeout set to 0, the service returns immediately.
TCP protocol Your program should handle the possibility of loss of TCP connections.
A TCP connection is a byte stream with no inherent message boundaries. The application
defines how to interpret message boundaries. For example, the application might use a
fixed length for all messages. For a variable-length message, the application might use a
fixed-length header that contains the length of the remainder of the message.
Both ends of the TCP connection must agree on the application protocol that is used.
Ethernet sniffer An Ethernet sniffer is useful to monitor the messages between the web server and other
devices. You can capture network traffic and set up filters to isolate messages between
particular devices and particular messages between those devices.
Category Consideration
Topic Publication Title Publication No.
MSG intructions Logix5000 Controllers Common Procedures 1756-PM001
EtherNet/IP Modules in Logix5000 Control Systems
User Manual ENET-UM001
Logix5000 Controllers General Instructions
Reference Manual 1756-RM001