Outputting Data and Controlling Operation through PROFINET
142
FQ2-S/CH User’s Manual
for Communications Settings
I/O Devices
I/O devices consist of DAPs and I/O modules.
The functions and properties of these devices are described in a GSD file.
The above information is described in the GSD file of the FQ2, and the I/O controller uses the GSD file of the
FQ2 to build the system.
Data Communication in PROFINET IO
In order for an I/O controller and I/O device to communicate, a connection called an AR (Application Relation)
must first be established between the two devices.
When the AR connection is established, data communication between the I/O controller and I/O device takes
place by means of a CR (Communication Relation) that defines the content of the data communication.
An I/O device can establish AR relations with multiple communication devices. In addition, multiple CR
relations can be defined inside one AR.
By establishing multiple CR relations inside one AR, communication that requires multiple profiles or differing
Subslots can be performed.
It is also possible to set a cycle time for each CR or I/O.
• DAP (Device Access Point) : This is an Ethernet access point, and is used by means of a communica-
tion program.
• I/O module : Consists of the Slot, Subslot, and Index below. An I/O module has one or
multiple slots.
Slot : Indicates the location of the I/O module in the I/O device.
Subslot : I/O interface inside the slot. This defines data types such as bit data and
byte data, and the meanings of the data types.
Index : Data in a Subslot.
When an I/O device is used in PROFINET, the GSD file that describes the device functions and properties is used to
configure the network configuration settings.
When the FQ2 is used in PROFINET as an I/O device, the GSD file of the FQ2 must be installed in the Engineering
Tool.
Note
FQ2-S_CH_comm.book 142 ページ ２０１４年６月２６日 木曜日 午前１１時４７分
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