Ethernet Host Communication - Leuze electronic DCR 248i Original Operating Instructions

• The "Address Link Label" contains the MAC address (Media Access Control address) of the device and
makes it possible to enter the IP address and the device name manually.
The area of the "Address Link Label" on which the MAC address is printed can be separated from the
remainder of the stick-on label if necessary using the perforation.
• The "Address Link Label" can be removed from the device and affixed in the installation and layout dia-
grams to designate the device.
• Once it is affixed in the documents, the "Address Link Label" establishes a unique reference between
the mounting location, the MAC address or the device, and the associated control program.
There is no need for time-consuming searching, reading, and manually writing down of the MAC ad-
dresses of every device that is installed in the system.
NOTICE
Each device with Ethernet interface is uniquely identified via the MAC address assigned during
production. The MAC address is also listed on the name plate of the device.
If multiple devices are commissioned in a system, the MAC address of each installed device
must be correctly assigned, e.g., during programming of the control.
8.3.4

Ethernet host communication

You can configure the connections to an external host system via the Ethernet host communication.
You can use both the UDP protocol as well as the TCP/IP protocol – in either client or in server mode. Both
protocols can be activated simultaneously and used in parallel.
• The connection-free UDP protocol is used primarily to transfer process data to the host (monitor opera-
tion).
• The connection-oriented TCP/IP protocol can also be used to transfer commands from the host to the
device. With this connection, the data is backed up by the TCP/IP protocol itself.
• If you would like to use the TCP/IP protocol, you must also define whether the device is to operate as a
TCP client or as a TCP server.
UDP
The device requires from the user the IP address and the port number of the communication partner. In the
same way, the host system (PC/control) also requires the set IP address of the device and the selected
port number. By assigning these parameters, a socket is formed via which the data can be sent and re-
ceived.
Ä Activate the UDP protocol.
Ä Set the following values:
ð IP address of the communication partner
ð Port number of the communication partner
The corresponding adjustment options can be found in the webConfig tool:
Configuration > Control > Host > Ethernet > UDP
TCP/IP
Ä Activate the TCP/IP protocol.
Ä Set the TCP/IP mode of the device.
ð In TCP client mode, the device actively establishes the connection to the superior host system, e.g.,
PC/control as server. The device requires from the user the IP address of the server (host system)
and the port number on which the server (host system) accepts a connection. In this case, the de-
vice determines when and with whom a connection is established.
ð In TCP server mode, the superior host system (PC/control) actively establishes the connection and
the connected device waits for the connection to be set up.
The TCP/IP stack must be informed by the user as to the local port of the device (port number) on
which connection requests from a client application (host system) are to be received.
If there is a connection request and a connection is established by the superior host system (PC/
control as client), the device – in server mode – accepts the connection. Data can then be sent and
received.
Leuze electronic
Starting up the device – Basic configuration
DCR 248i 43