Terms And Definitions - Omron CJ2-CPU Connection Manual

2. Terms and Definitions

Term
IO-Link device
IO-Link master
IO-Link Mode
Cyclic
communications
I/O data
Process data
IODD file
Node
Tag
Tag set
Explanation and Definition
A device with a sensor or an actuator that can perform IO-Link
communications with an IO-Link master.
A device that performs IO-Link communications with IO-Link devices in
an IO-Link System and that simultaneously functions as a slave for
host communications. "IO-Link Master Unit" is used to refer to a
specific Unit in this document.
A communication mode of an IO-Link master to perform IO-Link
communications with IO-Link devices.
Communications that exchange data in a fixed period with no need for
programming.
All target data in cyclic communications with a host.
IO-Link Systems contain the following two types of I/O data.
・Target data in cyclic communications with a host in an IO-Link master
・Target data in IO-Link devices for cyclic communications with an
IO-Link master
I/O data in IO-Link devices. You can allocate a maximum of 32 bytes of
process data in a master.
A definition file for an IO-Link device. The parameter settings for an
IO-Link device can be made by installing this file in
CX-ConfiguratorFDT.
A programmable controller and a device are connected to an
EtherNet/IP network via EtherNet/IP ports. EtherNet/IP recognizes
each EtherNet/IP port connected to the network as one node.
When a device with two EtherNet/IP ports is connected to the
EtherNet/IP network, EtherNet/IP recognizes this device as two nodes.
EtherNet/IP achieves the communications between programmable
controllers or the communications between a programmable controller
and a device by exchanging data between these nodes connected to
the network.
A minimum unit of the data that is exchanged on the EtherNet/IP
network is called a tag. The tag is defined as a network variable or as a
physical address, and it is assigned to the memory area of each
device.
In the EtherNet/IP network, a data unit that consists of two or more tags
can be exchanged. The data unit consisting of two or more tags for the
data exchange is called a tag set. Up to eight tags can be configured
per tag set for the programmable controllers produced by OMRON
Corporation.
2．Terms and Definitions
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