User's Manual

Quate c h SDS Us e r’s Manual Configuring the SDS using a We b inte rface
Re v 1 .5 0 (3 /1 3/2 00 5 ) Page 65
Step Procedure Description
Step 4 (non-MEI) / Step 5 (MEI) applies to all units
# Step 4
(non-MEI)
or
# Step 5
(MEI only)
Repeat the steps above for each port you
need to configure and then press Save to
implement all of your changes.
Close and re-open the port to activate
your changes.
That’s it! You’re done. Your SDS is
configured for the Raw TCP operating
mode.
Setting Raw UDP operating mode param eters
Raw UDP is mainly used to broadcast messages over a network. It is
a connectionless protocol that offers a direct way to send and receive
datagrams over an IP network but provides very few error recovery
services. UDP applications must generally be willing to accept some
loss, errors, or duplication. Most UDP applications do not require
reliability mechanisms and may even be hindered by them. If your
application requires a high degree of reliability, you should use a
protocol such as TCP.
UDP provides no guarantees for message delivery and a UDP sender
has no way of telling the status of its messages once it sends them
onto the network. For multicast packages, unlimited propagation of
UDP packets through routers is prevented by the Time To Live (TTL)
scheme. Each router decrements a packet’s TTL value and only
forwards those packets whose TTL value is greater than the
threshold configured on the router.
UDP has three possible modes of communication that you select
according to the IP/UDP address you enter:
! Point to point – key in a specific device’s address to communicate
only with that device
! Broadcast – key in the broadcast address of 255.255.255.255 to
send to all devices listening for the transmission
! Multicast – key in an address in the assigned UDP range of
224.0.0.0 – 239.255.255.255 to send to several devices with the
selected address
Step Procedure Description
# Preliminary
Step
Select Serial Ports from the selection
bar.
Note: Setup screens vary slightly between
RS-232 and RS-232/422/485 (MEI) units.
If you have an RS-232/422/485 (MEI) SDS,
the Configure Serial Port Interface step will
display so that you can select between RS-
232 and RS-422/485 operation.
If you have an RS-232 SDS, the Configure
Serial Port Interface step will not display
and you will not be presented with any RS-
422/485 configuration options.
The Serial Port Setup screen shown on
the following page displays.
Note: Click on a link to see a pop-up help
screen for that item. For example, if you
click on the Raw UDP link, the following
help screen pops up.
Note: In Raw UDP, your SDS
can send messages to multiple
receivers simultaneously.