Cyclic Communication Function; Overview Of Cyclic Communication - Panasonic AFP0HC32ET User Manual

Cyclic Communication

2.1 Cyclic Communication Function

2.1.1 Overview of Cyclic Communication

The cyclic communication is a function to perform data transmission with constant intervals
(RPI) between PLC and PLC or PLC and I/O device on the EtherNet/IP network.
In the cyclic communication, one device opens a communication line which is called
connection for a destination device. The side which opens the connection (communication
line) is called "originator", and the side which the connection is opened is called "target".
Originator
PLC
Connection information on the cyclic communication is set in the originator. The originator
connects to the target according to the connection information. The tag/instance required for
the connection from the originator is registered in the target.
Once the connection is open, the cyclic communication begins according to the settings of the
connection information.
Originator
Cyclic communication
PLC
Comparison of originator and target
Item
Applicable model
When starting
communication
Connection
information
2-2
Opens connections.
Originator
PLC
Opens connections.
(Connects to targets.)
Target connection information
- IP address
- Tag/Instance
Cyclic communication information
- RPI
- Communication method, etc.
Target
I/O device
PLC
Target
I/O device
PLC
Target
PLC, I/O device
Connection is opened.
(Connected from originator.)
Connected from originator
- Tag/Instance