KEYENCE IV Series - Manual (Page 64)

5-6 - IV Series User’s Manual (Field Network) -
Data I/O communication setting method
PLC settings
You can set the following settings for the PLC:
(1) Establish a real-time communication for setting up the data I/O communication.
(2) Se the I/O device to be used for the data I/O communication.
For details of the setting, Refer to the instruction manual of each PLC.
Establishing the data I/O communication
To start a data I/O communication, you need to create a communication path called AR (Application
Relation) and establish a real-time communication between the I/O controller and the I/O device . When
you create the AR, separate communication channels for data I/O and record data communications will be
set up. These communication channels are called CR (Communication Relation).
The communication is started in the following procedure:
(1) The I/O controller requests an AR connection to the I/O device.
(2) A response is returned from the I/O device, establishing a real-time communication.
(3) A connection will open if no error is encountered in the compatibility check.
(1) Requesting an AR connection
(2) Establishing a real-time communication
I/O device
PROFINET
communication
I/O Controller
y Communication settings for the data I/O communication, such as SendCycle (communication cycle) and
the data size, will be configured on the I/O controller side.
In a network with many connected devices (including the PROFINET devices), a network delay and/
or packet loss may occur when there is a heavy load on the network. Conduct a thorough verification
before the operation.
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Data I/O communication