WAGO 750-363/0040-0000 Manual page 156

156 Fieldbus Communication
• Manual assignment
In this mode, the IP addresses are permanently assigned on the DHCP
server to specific MAC addresses. The addresses are assigned to the MAC
address for an indefinite period.
Manual assignments are used primarily to ensure that the DHCP client can
be reached under a fixed IP address.
Automatic assignment
•
For automatic assignment, a range of IP addresses is assigned on the
DHCP server.
If the address was assigned from this range once to a DHCP client, then it
belongs to the client for an indefinite period as the assigned IP address is
also bound to the MAC address.
• Dynamic assignment
This process is similar to automatic assignment, but the DHCP server has a
statement in its configuration file that specifies how long a certain IP
address may be "leased" to a client before the client must log into the
server again and request an "extension".
If the client does not log in, the address is released and can be reassigned
to another (or the same) client. The time defined by the administrator is
called Lease Time.
Some DHCP servers also assign IP addresses based on the MAC address,
i.e., a client receives the same IP address as before after longer network
absence and elapse of the Lease Time (unless the IP address has been
assigned otherwise in the mean time).
DHCP is used to dynamically configure the network parameters.
The head station supports the following options in addition to the default "IP
address" option:
Manual
Version 1.0.0
750-363/0040-0000 FC EtherNet/IP G4 ECO XTR
WAGO-I/O-SYSTEM 750