Http (Hyper Text Transfer Protocol); Dhcp (Dynamic Host Configuration Protocol) - WAGO 750-370 Manual

4.1.3.3.2

HTTP (Hyper Text Transfer Protocol)

HTTP is a protocol used by WWW (World Wide Web) servers for the
forwarding of hypermedia, texts, images, audio data, 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 (programmable) fieldbus coupler or
controller is used for viewing the HTML pages saved in the coupler/controller.
The HTML pages provide information about the coupler/controller (state,
configuration), the network and the process image.
On some HTML pages, (programmable) fieldbus coupler or controller settings
can also be defined and altered via the web-based management system (e.g.
whether IP configuration of the coupler/controller 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.
4.1.3.3.3

DHCP (Dynamic Host Configuration Protocol)

The coupler's/controller's built-in HTML pages provide an option for IP
configuration from a DHCP server, a BootP server, or the data stored in its
EEPROM by default.
Note
The network configuration via DHCP is not stored in the EEPROM, this only
occurs when using the BootP protocol.
The DHCP client allows dynamic network configuration of the
coupler/controller by setting the following parameters:
Parameter
IP address of the client
IP address of the router If communication is to take place outside of the local network, the
Subnet mask
IP addresses of the
DNS servers
Lease time
Renewing time
Rebinding time
WAGO-I/O-SYSTEM 750
PROFINET IO
Meaning
Network address of the coupler/controller
IP address of the routers (gateway) is indicated in this parameter.
The Subnet mask makes the coupler/controller 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.
Here the maximum duration can be defined, how long the
coupler/controller keeps the assigned IP address. The maximum
lease time is 24.8 days. This results from the internal resolution of
timer.
The Renewing time indicates, starting from when the
coupler/controller must worry about the renewal of the leasing
time.
The Rebinding time indicates, after which time the
coupler/controller must have gotten its new address.
Fieldbus Communication
ETHERNET
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