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Appendix G Introduction
380 Adept MV Controller User’s Guide, Rev. B
Introduction
DeviceNet is a low-cost communications link that connects industrial devices to a
network and eliminates expensive hard wiring. The direct connectivity provides
improved communication between devices as well as important device-level
diagnostics not easily available using hard-wired I/O interfaces.
Adept Technology is a member of the Open DeviceNet Vendor Association
(ODVA), which is independently run and operated and not directly associated
with any one company. The ODVA controls DeviceNet technical specifications
with help from Special Interest Groups (SIGs). Each SIG develops device profiles
for one line of product features to ensure interoperability. These profiles become
part of the technical specifications.
The DeviceNet Specification is divided into two volumes and defines the
following elements:
Volume 1
• DeviceNet Communication Protocol and Application (Layer 7 -
Application Layer
1
)
• Controller Area Network (CAN) and its use in DeviceNet (Layer 2 - Data
Link Layer)
• DeviceNet Physical Layer and Media (Layer 1 - Physical Layer)
Volume 2
• Device profiles to obtain interoperability and interchangeability among
like products
DeviceNet incorporates CAN, which defines the syntax or form of the data
transmitted. The DeviceNet application layer defines the semantics or meaning of
the data transmitted. For more information on the basics of a DeviceNet cable
system, contact ODVA at:
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These layers are based on the Open Systems Interconnect (OSI) model.
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