Specifications

96 209351 REV B Operations Manual, Redundant System Controllers
UDP (User Datagram Protocol) was chosen over TCP (Transmission Control Protocol)
because it is connectionless; that is, no end-to-end connection is made between the
RCP2 unit and controlling workstation when datagrams (packets) are exchanged.
Teledyne Paradise Datacom provides a Windows
TM
-based control application to
establish UDP-based Ethernet communication with the RCP2. The control application
manages the exchange of datagrams to ensure error-free communication. An attractive
benefit of UDP is that it requires low overhead resulting in minimal impact to network
performance. The control application sends a UDP request to RCP2 unit and waits for
response. The length of time the control application waits depends on how it is
configured. If the timeout is reached and the control application has not heard back
from the agent, it assumes the packet was lost and retransmits the request. The
number of the retransmissions is user configurable.
The Teledyne Paradise Datacom RCP2 Ethernet IP interface can use UDP ports from
0 to 65553 for sending and receiving. The receiving port needs to be specified through
the front panel menu. For sending, it will use the port from which the UDP request orig-
inated. It is up to the user to select an appropriate pair of ports that are not conflicting
with standard IP services. Teledyne Paradise Datacom recommends usage of ports
1007, 1038 and 1039. These ports are not assigned to any known application.
As an application layer protocol (which actually carries meaningful data), the standard
RCP2 serial protocol was selected. This protocol proves to be extremely flexible and
efficient. It is also media independent and can be easily wrapped into another protocol
data frame. An example of the UDP frame with encapsulated Teledyne Paradise
Datacom protocol frame is shown on Figure 7-14.
This set of Ethernet IP protocols is currently supported by Teledyne Paradise Datacom
Universal M&C package (RCP2/FPRC/RCPD selection). The software package is
supplied on CD with the controller unit, or can be downloaded by registered users of
the company web site, http://www.paradisedata.com.
7.6.2.2 Setting IPNet interface
All IP-related menu items are consolidated under “Main Menu” → “2.Com.Setup”→
“5.IPSetup”.
Prior to enabling the Ethernet IP interface, the following IP parameters need to be set:
IP Port address, Default Gateway, Subnet Mask, Receive IP Port and IP lock address.
The IP Lock address is a security measure. Setting this parameter either to 0.0.0.0 or
255.255.255.255 will allow any host to control the RCP2. Setting the parameter to the
UDP Header
(8 bytes)
SSPA Serial Protocol Frame
(11+N Bytes, 0<N<128)
Figure 7-14: UDP Redirect Frame Example
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