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IC-KP2-2HB17-2V1D
Commands
7.9
Communication via PROFINET
7.9.1
What is PROFINET?
PROFINET is an open standard for industrial automation based on industrial Ethernet.
PROFINET integrates information technology with established standards such as TCP/IP and
XML into automation technology.
The communication concept for setting up decentralized applications within PROFINET is
PROFINET IO, i.e. decentralized field devices are installed by PROFINET IO. The familiar IO
view of PROFIBUS DP is used where the usable data of the field devices is cyclically
transferred to the PLC process image. PROFINET IO is a device model consisting of slots and
channels, which is based on the main features of PROFIBUS DP. Descriptions of the field
device properties are stored in a General Station Description file in XML format ("GSD file" or
"GSDML file"). PROFINET IO is engineered in the same way as system integrators from
PROFIBUS DP. The decentralized field devices are assigned in the settings of a PLC.
PROFINET IO draws a distinction between three device types: IO controller, IO device,
and IO supervisor.
IO controller: Controller that executes the automation program (PLC).
■
IO device: Decentrally assigned field device that is assigned to an IO controller.
■
IO supervisor: Programming unit/PC with commissioning and diagnostic function.
■
In the network, the control unit is an IO device that communicates cyclically with the IO
controller during operation.
7.9.2
Project planning using device description (GSD)
As with PROFIBUS DP, the PROFINET IO device is integrated in the configuration tool by way
of a device description. The properties of an IO device are stored in the GSD file. The GSD file
contains the data of a field device (technical features and information for communication)
required to operate the device in a PROFINET network.
You must import the GSD file of the IO device into the configuration tool. Peripheral addresses
are assigned to the individual IO channels of the field devices. The peripheral input addresses
incorporate the received data. The user program evaluates and processes this data. The user
program generates the peripheral output values and sends them to the control unit.
Once planning is complete, the IO controller receives the planning and configuration data. The
IO controller programs and configures the IO devices automatically.
The GSD file can be downloaded from our internet site (http://www.pepperl-fuchs.com) by
searching for the device name and clicking Technical documents.
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