Doc: HMSI-27-309, Rev. 3.11Anybus Communicator PROFINET User Manual
Chapter 4
4. Basic Network Configuration
4.1 General Information
The Anybus Communicator offers two modes of operation regarding the network settings (see below).
Which mode to use is determined by the “TCP/IP Settings” parameter in Anybus Configuration Man-
ager, see “Fieldbus Settings” on page 54.
• TCP/IP Settings: Enabled
When operating in this mode, the contents of the system file “ethcfg.cfg” will be ignored com-
pletely, causing the following behavior:
- DNS services will not be available
- Domain and Host name cannot be set
- E-mail services will not be available
- Settings received from the network (i.e. via HICP or DCP) will be lost in the event of a power
loss or reset.
• TCP/IP Settings: Disabled
When operating in this mode, the Anybus Communicator module will use the settings stored in
the system file “ethcfg.cfg”. If this file is missing, the module will attempt to retrieve its settings
via DHCP or HICP for 30 seconds. If no configuration has been received within this period, the
module will halt and indicate an error on its status LEDs.
DCP (Discovery and Basic Configuration)
The Anybus Communicator fully supports the DCP protocol, which allows an IO Controller/Supervi-
sor to change the TCP/ IP settings during runtime.
DHCP/BootP
The Anybus Communicator can retrieve the TCP/IP settings from a DHCP or BootP server. If no
DHCP server is found, the module will fall back on its current settings (i.e. the settings currently stored
in “\ethcfg.cfg”).
If no current settings are available (i.e. “ethcfg.cfg” is missing, or contains invalid settings), the module
will halt and indicate an error on the onboard status LEDs. The network configuration may however
still be accessed via HICP, see “Anybus IPconfig (HICP)” on page 29.
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