Outputting Data and Controlling Operation through PROFINET
FQ2-S/CH User’s Manual
for Communications Settings
141
3
Controlling Operation and Outputting Data with an
Ethernet Connection
PROFINET IO
Communication Specifications of PROFINET IO
The communication specifications of PROFINET IO are described below.
PROFINET IO specifies the supported functions by conformance class, with consideration given to the
application.
The functions below are defined in Class A.
Device Types Used in PROFINET IO
The devices below are defined in PROFINET IO.
Communication Specifica-
tions
Type Details Support on FQ2
Periodic data communica-
tion method
RT (real-time) communica-
tion
Uses standard Ethernet hardware and
achieves the same level of perfor-
mance as the existing Fieldbus.
Supported
IRT(Isochronous real-time)
communication
This method provides a higher level of
assurance than RT that communica-
tion will be executed within a specific
time.
Intended for use in systems such as
motion control that require strict real-
time.
Not supported
Class Overview Support on FQ2
Class A Supports the basic functions of RT communication. Supported
Class B This class adds network diagnosis and redundancy functions used in
process automation and other applications.
Not supported
Class C Supports IRT communication that realizes reliable synchronization. Not supported
Function Overview
Cyclic data exchange Real-time data communication between the I/O controller and I/O devices at
determined cycles.
Set by I/O data CR.
Acyclic parameter data /
device identification
Used for parameter settings, I/O device configuration, and reading of device
information.
Set by record data CR.
Device/network diagnosis Communication for the purpose of sending alarms and statuses from I/O
devices to the I/O controller.
Set by Alarm CR.
Ty p e Details
I/O controller Controller for external and other devices
I/O device Sensor device connected to the I/O controller
The FQ2 is an I/O device.
I/O supervisor PC or other device used for maintenance and diagnosis
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