Beijer Electronics SCOM Protocol EN - Manual (Page 9)

Ethernet Communication
Beijer Electronics, MAEN975 9
UDP
UDP (User Datagram Protocol) is a connectionless protocol.
SCOM messages are encapsulated within UDP, which allows sending and receiving
them via Ethernet.
Connectionless means that no individual destination address is specified. Instead,
UDP packets are sent to the predefined broadcast address 255.255.255.255, at
which any Beijer Electronics MT230 Nautic Monitor listens. Individual addressing
is done in the upper protocol layers, such as SCOM and TCP/IP.
Ports Used to Send and Receive Data
Two ports are used to send and receive data:
• UDP receive port
• UDP send port
From the Beijer Electronics MT230 Nautic Monitor perspective, commands are re-
ceived from the receive port and responses are sent to the send port. Thus, a remote
controller software must send commands to the receive port and receive responses
from the send port. If a Beijer Electronics MT230 Nautic Monitor acts as a remote
controller, it also sends commands to the receive port, because remote controlled
monitors always listen to this port to get commands.
TCP/IP
In contrast to UDP, TCP/IP (Transmission Control Protocol/Internet Protocol) uses
a network address assigned to each participant in a network. Beijer Electronics
MT230 Nautic Monitor implements TCP/IP to support high level protocols, such
as HTTP.
A TCP/IP address and the corresponding subnet mask can be assigned dynamically
or statically.
Dynamic Addressing
Dynamic TCP/IP addressing is made using an by an external DHCP-server.
Static Addressing
Static TCP/IP addressing is made using the built-in HTML configuration pages.
HTTP
Beijer Electronics MT230 Nautic Monitor uses HTTP (Hypertext Transfer Proto-
col) to provide HTML-based configuration pages. These pages are exposed through
the integrated web server.
There is no separate configuration option available, since the protocol is stacked
above TCP/IP.
The only option that can be configured is a password, which can be used to protect
some configuration pages.