Copyright © 2006
Operation Manual
41
—Chapter 4—
UDP MESSAGING
This chapter describes the operation and options available to the user for sending UDP messages to the
Marquee.
WHAT IS UDP?
User Datagram Protocol (UDP) is one way of sending data over an Ethernet network.
Using UDP, programs on networks computers can send short messages sometimes known
as datagrams to one another. UDP is sometimes called the Universal Data Protocol. Many
of today’s pc programing packages alone with industrial products such as PLC support UDP
communications. UDP also is designed to support broadcast mode which allows a single
message to be sent from a system and then received by multiple devices.
HOW IS UDP IMPLEMENTED IN THE MARQUEE?
Full UDP functionality is supported by the Marquee.
PORT
The port address used for receiving UDP messages is 2010. Any data received on this port of
the Marquee will be read and displayed on the Marquee.
IP ADDRESS SPECIFIC
If the user wishes to send a message to a giving Marquee on the network then the Marquee IP
address is used during the message transfer. In the UDP message transmission the user must
supply the IP address of the Marquee that he/she wishes to send the message. The port is always
the same and is 2010.
BROADCAST MESSAGE
If the user wishes to send a message to all Marquees on the system then the user specifies the
broadcast IP address (255.255.255.255). Upon sending a message to port 2010 with the
broadcast IP address, all Marquees on the network will display the same message.