4-5
4 Controlling Operation and Data Output with PROFINET
V430-F Series Autofocus Multicode Reader User Manual for Communication Settings
4-1 Overview o
f PROFINET
4
4-
1-1 T
yp
es of PR
OF
INET
I/O devices consist of DAPs and I/O modules.
The functions and properties of these devices are described in a GSD file.
• DAP (Device Access Point):
This is an Ethernet access point and is used by means of a communication
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.
The above information is described in the GSD file of the
V430-F
, and the I/O controller uses the GSD
file
of the
V430-F
to build the system.
Additional Information
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
V430-F
is used in PROFINET as an I/O device, the GSD file of the
V430-F
must be
installed in the engineering tool.
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.
CR is classified into IO data CR, record data CR, and alarm CR. Within the IO data CR, data communication
is performed for each refreshing task period. Within CRs other than the IO data CR, communication
takes place between the periodic data communications. Within the record data CR, the IO controller will
send commands to the IO device(s) at any time. IO device(s) will send back responses to the IO controller.
IO Devices
Data Communication in PROFINET IO
V430-F
CR
PLC
Output Area
(control input,
commands, etc.)
Input Area
Ethernet (PROFINET)
I/O device
CR
I/O controller
External device
(PLC
V430-F
)
AR
External device
(PLC
V430
-F
)
Cyclic Input
Data
Communication
Cycle
Communication
Cycle
Cyclic Output Data
(control output,
measurement results, etc.)
