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Issue
98, September 1998
Networking
with DeviceNet
by
Jim Brady
Start
• Sorting Them Out
• New
Breed •
Motivation •
Can •
Message Reliability •
DeviceNet Connections •
Device Net Messages •
Stringing Messages Together •
Some Real Messages •
Object Library •
Conformance Testing •
DeviceNet Standards •
References,Sources,PDF
Sorting
Them Out
Where
does DeviceNet fit into the network menagerie? At first
glance, all the networks look quite similar. However,
each one has a unique set of features and is designed
to move a specific type of data between certain kinds
of equipment.
Here,
"device" refers to small to mid-size equipment
with multiple integrated sensors and/or actuators. Device
networks are designed to interconnect these devices.
As
devices get smarter and processing power cheaper, even
simple devices may have high-level network ports, producing
a consolidation toward the high end of Figure 1. But there
will always be a need for more than one level of network.
Plant engineers don’t want to share their Ethernet
office network with assembly robots!
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