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G-1
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 Vendor 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 communication 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 device) of devices of the same type (equipment, etc.).
Provides mutual exchangeability between devices of the same type. Also known as a
device model. Devices for which device profiles are currently being investigated include
sensors, valves, display 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.
Содержание E5AR
Страница 2: ...E5AR ER Digital Controller DeviceNet Communications User s Manual Produced February 2004...
Страница 3: ...iv...
Страница 29: ...2 6 Functions Supported Only by the E5AR ER DRT Section 2 2 Operating Procedures...
Страница 43: ...3 14 How to Use the Terminals Section 3 2 Parts Installa tion and Wiring Circuit COM 12 V 4 7 K K...
Страница 79: ...6 8 Message Communications Performance Section 6 2 Communications Performance...
Страница 91: ...B 6 Mounted Objects Appendix B Appendix B...
Страница 95: ...C 4 DeviceNet Connection Hardware Appendix C Appendix C...
Страница 97: ...G 2 Glossary...
Страница 100: ...Index I 3 W wiring 3 10 precautions 3 9 write mode 4 12...
Страница 101: ...I 4 Index...