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The Greater Design

Data Highway Plus Industrial Local Area Network

Network Description
The Data Highway Plus network is a local area network designed to support remote programming for factory-floor applications.

Functional Design
The Data Highway Plus network lets you connect a maximum of 64 devices per link (although 15 or fewer nodes are recommended per link), including:
PLC-5 and SLC 5/04 programmable controllers
Color graphics systems
Personal computers
Host computers
Numerical controls
Programmable RS-232-C/RS-422 devices

Mechanical Design
You can configure a network of 99 links. With a multi-link network, you can have more nodes in the network. By placing nodes in the proper link with some nodes and separate from other nodes, you can also improve the efficiency of message delivery.

Communication
With Rockwell Software Programming Software, you can program your PLC controllers over your Data Highway Plus network. You can program a PLC controller from its local DH+ link or from a remote DH+ link in the network. This means that a single industrial terminal connected to your network can be used to program all the PLC controllers on all links of your network.
The ControlLogix Communication Interface Module (catalog number 1756-DHRIO) interfaces two DH+ links to the ControlLogix backplane to provide routing of messages between a DH+ link and:
ControlNet links - Ethernet Links - DeviceNet links - other DH+ links
You can also use Data Highway Plus modules to implement a SCADA network.

Features
Includes switches on each interface that make it easy to reconfigure your network as it changes
Incorporates network diagnostics that help you avoid costly downtime and improve network efficiency
Lets you use communication software to provide a Data Highway Plus communication driver to various computer platforms

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Last modified: July 18, 2002