Chapter 1 Overview; Table 1-1. Bus Interface Module Products - GE 90*-30 PLC Series User Manual

Chapter
1
GFK-1322A
Overview
The Series 90 PLC L W
ON
GE Series 90-30 PLC (programmable logic controller) and an Echelon L
network. The LBIM maps network variables into specific PLC register locations. It can support up
to 244 network variables (240 can be configured by the user), and map these network variables
into the %I, %Q, %AI, and %AQ PLC memory references. The Module adheres to the L
Layers 1—6 Interoperability Guidelines (078-0120-01)for the interface to the L
network
A L W network can range in size from two to tens of thousands of devices and can be used
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in a wide range of control network applications. L
architecture, in which intelligent control devices, called nodes, communicate with each other
®
using the L T protocol. Each node consists of a physical interface that couples the node
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microcontroller with the communications medium, and embedded intelligence that implements
the protocol and performs control functions. Figure 1-1 illustrates a sample network configuration
that uses an LBIM to communicate with a Series 90-30 PLC.
An individual node usually performs a simple task. Devices such as proximity sensors, switches,
relays, and motor drives can be nodes on a network. The network controls the interaction of the
nodes to perform a complex application, such as controlling a manufacturing line or automating a
building.
The LBIM can interface with networks that use twisted pair cabling . The LBIM contains a
transceiver that provides a physical communication interface between the module and a
L W network. The type of embedded transceiver determines the network topology
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supported.

Table 1-1. Bus Interface Module Products

Catalog No. Embedded Transceiver
PE693BEM350 TP/FT-10
PE693BEM351 TP/XF-78
PE693BEM352
TP/XF-1250
The following topics are presented in this chapter:
T
L W Network Overview...................................................................................1-2
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T
Bus Interface Module Overview..................................................................................1-5
Bus Interface Module (LBIM) provides an interface between the
ORKS
ON
Free
(Bus, Star, Loop, Others,
Combinations)
Bus/Loop
Bus/Loop
W
ON
W technology uses peer-to-peer
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Topologies Supported
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M
ON ARK
W
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1-1