Yaskawa SmartTrac DeviceNet Card - Manual (Page 39)

SMART TRAC DeviceNet Card
Technical Manual 3554-0070 Glossary of Terms
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Glossary of Terms
A type of message between Master and Slave devices on a DeviceNet network.
A Bit-Strobe Command message provides 1-bit of data to each Slave. It is sent
by the Master in a specified time interval. A Bit-Strobe Response message
contains the Slave's response to a Bit-Strobe command by providing up to 8 bits
of data back to the Master.
The act of configuring a new DeviceNet network, such as setting baud rate,
MAC ID, and device attributes for all connected nodes on a network.
A type of network (CAN) originally developed for the auto industry. It was later
found useful for many other industrial applications. CAN's communication
protocol is used in DeviceNet because it provides high noise immunity and high
temperature operation. Because it uses a serial bus, it reduces signal wiring
complexity and cost while providing high speed digital control for optimum
performance.
The second lowest layer in the OSI seven-layer model. It splits data into frames
for sending on the physical layer and receives acknowledgement frames. It
performs error checking and re-transmits frames not received correctly. The data
link layer is split into an upper sublayer, Logical Link Control (LLC), and a
lower sublayer, Media Access Control (MAC).
Messages between a Master device and a specific Slave device on a DeviceNet
network. Explicit Request messages, sent by the Master whenever a desired
service is required, may read data from the Slave, write data to the Slave, and/or
reset the Slave. Explicit Response messages are sent by a Slave back to the
Master after receiving an Explicit Request message.
Acronym for Media Access Control Identifier. The identifier or address for the
lower sublayer of the data link layer of the OSI networking model. The MAC is
the interface between a node's Logical Link Control and the network's physical
layer.
An established standard for networking devices that does not require vendors to
purchase hardware, software, or licensing rights to connect devices to a system.
Acronym for Open Systems Interconnect, a model used to describe a network.
The system describes a network in terms of seven layers. Each layer provides a
set of functions to the layer above, and relies on the functions of the layer below.
Each layer communicates with its peer layer on another node by sending
messages back and forth. OSI was developed by the International Standards
Organization (ISO) in 1978. The model was mandated for use by the U.S.
Government until 1995.
Bit Strobed I/O
commissioning
Controller Area
Network
data link layer
explicit messaging
MAC ID
open network
standard
OSI