User`s guide

Ethernet Control 65
Ethernet
Control
UDP Message Layer
The control source sends UDP Packets to the DVM2. A UDP Packet contains
information about the packet source (IP Address, Port number) as well as
definable user data. The user data contains the entire DVM2 Control Message
including all AMINet specific bytes. These packets should be sent to the
broadcast IP Address (0xFFFFFF) with UDP port number 2639.
Control Message Response
The DVM2 will normally send back a response to each Control Message it
receives. The user data in these responses will match the responses in the
Pioneer / AMI Serial control command descriptions but will have the added
AMINet wrapper like a Control Message. For example, you’ll receive an “ R”
contained in the AMINet wrapper when you send a “ PL” contained in the
AMINet wrapper. The responses are sent to the IP Address and UDP Port
number found in the UDP packet that contained the original Control Message.
As with the Addressable serial protocol, any Control Message sent to the
wildcard unit ID (127) will not receive any response. This practice avoids any
potential confusion at the source of the Control Message due to many responses
to the same message.
A Software Developer’s Kit with C Source Code implementing this protocol
is available on our website at http://www.alcorn.com/support