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Glossary
The following table provides a list of commonly used DeviceNet terms.
Term
Explanation
Bus OFF
Indicates that the error rate in the network is extremely high. Errors are detected when a
fixed threshold is exceeded by the internal error counter. (The internal error counter is
cleared when the Master Unit is started or restarted.)
CAN
CAN is short for Controller Area Network. It is a communications protocol developed as a
LAN for use in automobiles. DeviceNet employs CAN technology.
Configurator
A device for setting the system settings. The Configurator can read ID information, read
and write parameters, and display the network configuration.
OMRON’s DeviceNet Configurator is designed for use with an OMRON Master Unit.
Consumed Connection Size
Indicates the data size (byte length) received via the connection.
ODVA
ODVA is short for Open DeviceNet Vendors Association, Inc. It is a non-profit organization
formed by machine vendors with the aim to administer and popularize the DeviceNet
specification.
Produced Connection Size
Indicates the data size (byte length) sent via the connection.
Connection
This is a logical communications channel for facilitating communications between nodes.
Communications are maintained and managed between the master and slaves.
Device Profile
Standardizes the configuration and behavior (the smallest data configuration and opera-
tion that must be supported by the devices) of devices of the same type. Provides mutual
exchangeability between devices of the same type. Also known as a device model.
Devices for which device profiles are currently being studied include sensors, valves, dis-
play units, and encoders.
Master/Slave
A node can be either a master, which collects and distributes data, or a slave, which out-
puts and inputs data according to the instructions received from the master. OMRON’s
DeviceNet products are already provided with either master or slave functions in a pre-
defined master/slave connection set.
Summary of Contents for SMARTSLICE - 04-2008
Page 1: ...DeviceNet Communications Unit Cat No W454 E1 03 SmartSlice GRT1 DRT OPERATION MANUAL ...
Page 2: ...SmartSlice GRT1 DRT DeviceNet Communications Unit Operation Manual Revised April 2008 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 13: ...xiv ...
Page 27: ...8 Basic Operating Procedure Section 1 5 ...
Page 57: ...38 Unit Functions Section 2 3 ...
Page 101: ...82 DeviceNet Explicit Messages Appendix A ...
Page 113: ...94 Standard Models Appendix C ...
Page 115: ...96 Power Consumption Tables Appendix D ...
Page 117: ...98 I O Current Consumption Appendix E ...
Page 119: ...100 Glossary ...