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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

ONWORKS 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

ONWORKS

transceiver to communicate on a L

ONWORKS

network.

i.LON 10 Ethernet Adapter You can use the i.LON 10 Ethernet Adapter to

connect to devices on a L

ONWORKS 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

ONWORKS 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

ONWORKS

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.

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