WAGO 750-341 Manual page 122

118 • Network Communication
Application Protocols
Parameter
IP address of the client
IP address of the router
Subnet mask
IP addresses of the DNS
servers
Host name
When using the bootstrap protocol for configuring the node, the network
parameters (IP address, etc... ) are stored in the EEPROM.
Note
The network configuration is only stored in the EEPROM when the BootP
protocol is used, although not if configuration is done via DHCP.
The BootP protocol is activated in the coupler by default.
When the BootP protocol is activated, the coupler expects a BootrP server to
be permanently present.
If, however, there is no BootP server available after a power-on reset, the
network remains inactive.
To operate the coupler with the IP configuration stored in the EEPROM, you
must first deactivate the BootP protocol.
This is done via the web-based management system on the appropriate HTML
page saved in the coupler, which is accessed via the "Port" link.
If the BootP protocol is deactivated, the coupler uses the parameters stored in
the EEPROM at the next boot cycle.
If there is an error in the stored parameters, a blink code is output via the IO
LED and configuration via BootP is automatically switched on.
5.3.4.4 HTTP (HyperText Transfer Protocol)
HTTP is a protocol used by WWW (World Wide Web) servers for the
forwarding of hypermedia, texts, images, audiodata, etc.
Today, HTTP forms the basis of the Internet and is also based on requests and
responses in the same way as the BootP protocol.
The HTTP server implemented in the ETHERNET fieldbus coupler is used for
viewing the HTML pages saved in the fieldbus coupler. The HTML pages
provide information about the fieldbus coupler (state, configuration) and the
network.
On some HTML pages, coupler settings can also be defined and altered via the
web-based management system (e.g. whether IP configuration of the coupler
is to be performed via the DHCP protocol, the BootP protocol or from the data
stored in the EEPROM).
The HTTP server uses port number 80.
Meaning
Network address of the coupler
If communication is to take place outside of the local
network, the IP address of the routers (gateway) is
indicated in this parameter.
The Subnet mask makes the coupler able to
differentiate, which parts of the IP address determine
the network and which the network station.
Here the IP addresses can be entered by maximally 2
DNS servers.
Name of the host
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP