Echelon LNS - Manual (Page 282)

LNS Programmer's Guide 268
Power Line SLTA The Power Line SLTA is an EIA-232 compatible
serial device that allows any PC with an EIA-232
interface to connect to and communicate with a
L
ON
W
ORKS
network. The Power Line SLTA can be
connected to host PC through a pair of modems
and a telephone network, allowing for remote
operations. It can be configured to answer
incoming calls from remote hosts, or to initiate
calls to remote hosts.
LTS-20 The LTS-20 SLTA Core Module is a 40-pin single
in-line module (SIM) that is an embeddable
version of the SLTA-10. The LTS-20 is
functionally equivalent to the SLTA-10. The LTS-
20 requires the addition of a L ON W ORKS
transceiver to communicate on a L ON W ORKS
network.
i .LON 10 Ethernet Adapter You can use the i .LON 10 Ethernet Adapter to
connect to devices on a L ON W ORKS network via an
IP network. You will need to use the OpenLDV
xDriver software subsystem to do so. For more
information on this, see Using xDriver Interfaces
on page 271.
i .LON 100 Internet Server You can use the i .LON 100 Internet Server to
connect to devices on a L ON W ORKS network via an
IP network. You will need to use the OpenLDV
xDriver software to do so. The i .LON 100 Internet
Server also contains a large set of applications you
can use, allowing you to use it as a network
controller and a network interface
simultaneously. For more information on this, see
Using xDriver Interfaces on page 271.
The PCLTA-20, PCLTA-21 and PCC-10 LNS network interfaces can be used as high
performance network interfaces, or as standard network interfaces. There are many
factors to consider when you decide which type of network interface you should use.
Using an LNS high performance network interface causes much of the L ON W ORKS
protocol processing to be performed on the PC containing the network interface, as
opposed to on the network interface hardware. This expands the capabilities of the LNS
network interface, and allows you to open multiple networks simultaneously with a
single network interface. When using a standard network interface, you can only access a
single network at a time.
In addition, when using a high performance network interface, your application can
perform up to 250 message transactions simultaneously. Standard network interfaces
can only perform one transaction at a time, and so they cannot start a new message
transaction while another is completing. The ability to perform multiple transactions
simultaneously is highly beneficial in large networks, where you may need to poll the
value of hundreds of separate network variables at a time.
NOTE: The i .LON 100 Internet Server supports up to 15 simultaneous transactions at a
time.