The TSX ETY 4103/PORT/5103 module or the Ethernet link of the TSX P57 6634/5634/4634 can get addresses either through DHCP or BOOTP.
DHCP (Dynamic Host Configuration Protocol) is a protocol that manages network parameters for network devices. Individual devices can get network IP addresses from a DHCP server through a request from this device.
The TSX ETY 4103/PORT/5103 module or the Ethernet link of the TSX P57 6634/5634/4634 can be configured as the DHCP server. They can also have their address configured by the user or dynamically allocated from an address server (configuration as BOOTP client).
NOTE: The DHCP server can also respond to the BOOTP protocol.
A module configured as a BOOTP client transmits requests on the network every second while it is starting up until it receives a reply from an address server.
The remote device acting as the BOOTP/DHCP server responds to this request and assigns the following to the client module. These must be configured correctly in order for BOOTP to work properly.
NOTE: The display of this information from a browser connected on the HTML pages of the rack display on the web server is sometimes inaccurate. Therefore, you must connect a Control Expert application on the PLC concerned in order to obtain the real values.
NOTE: If the absence of the address server or if there is no response, the client module does not start.
The following diagram shows the routing of requests during start-up of a station on the network:
