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3.6.3
Address setting via the mode DHCP
In order to activate the DHCP-mode, the DIP-switch MODE is set to "ON", the rotary switches to
address "40" (see
Device addressing and operation mode setting (page 19)
).
Address setting is carried out by a DHCP-server in the network after the start-up of the gateway.
The IP address, as well as the default subnet mask assigned to the gateway by the DHCP-server, are
stored in the module’s EEPROM. If the gateway is subsequently switched to another address--mode,
the settings (IP address, subnet mask, etc) will be read from the module’s EEPROM.
DHCP supports three mechanisms for IP address allocation:
In "automatic allocation", the DHCP-server assigns a permanent IP address to a client.
In "dynamic allocation", DHCP assigns an IP address to a client for a limited period of time. After
this time, or until the client explicitly relinquishes the address, the address can be re-assigned.
In "manual allocation", a client's IP address is assigned by the network administrator, and DHCP
is used simply to convey the assigned address to the client.
DHCP in PROFINET
Please assure, that in PROFINET-applications, the address assigned via a BootP-server corresponds
to the address, which is assigned in the configuration tool.
3.6.4
Address setting via the mode PGM
In order to activate the PGM-mode, the DIP-switch MODE is set to "ON", the rotary switches to
Device addressing and operation mode setting (page 19)
).
The PGM-mode enables access of the software I/O-ASSISTANT (FDT/DTM) to the module’s network
settings (see also „Address setting via DTM“).
NOTE
After every change of the address-mode, a voltage reset must be done.
NOTE
After every change of the address-mode, a voltage reset must be done.
NOTE
In the PGM-mode, all network settings (IP address, subnet mask, etc.) are read from the
module’s internal EEPROM.