Profinet Io Communications Protocol - Omron V680S Series User Manual

Section 5
Host Communications Specifications

PROFINET IO Communications Protocol

Data Exchange with PROFINET IO
The host device (PLC) and Reader/Writer function as the IO controller and IO device.
You must establish a connection called an AR (application relation) between the two devices to perform
communications between an IO controller and IO device.
When an AR connection is established the CRs (communications relations) that define the contents of
data communications are used to perform data communications between the IO controller and IO
device.
The CRs include the IO data CRs, record data CR, and alarm CR.
The IO data CRs are used to perform data communications every refreshing task period. The other
CRs perform communication between the cyclic data communications.
RFID System
104
User's Manual
(PROFINET)
IO controller
PLC
Output Area
Input Area
Output Module
IO data CR
AR
IO data CR
IO device
V680S
ID: 10
Input Module
ID: 20