OHV-F230-B17
Operation and Communication
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Operation and Communication
4.1
Communication via PROFINET
4.1.1
General Information on Communication via 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 in automation technology.
The communication concept for setting up decentralized applications within PROFINET is
PROFINET IO, i.e. decentralized field devices are integrated by PROFINET IO. The familiar IO
view of PROFIBUS DP is used where the usable data of the field devices is transferred to the
controller process image in cycles. PROFINET IO is a device model consisting of slots and
channels, which is based on the main features of PROFIBUS DP. The field device properties
are written in a GSDML (generic station description markup language) based on XML.
PROFINET IO is engineered in the same way as has long been the case for system integrators
of PROFIBUS DP. The decentralized field devices are assigned in the design of a controller.
PROFINET IO draws a distinction between three device types: IO controller, IO device, and IO
supervisor.
IO controller: Controller that executes the automation program.
IO device: Decentrally assigned field device that is assigned to an IO controller.
IO supervisor: Programming unit/PC with commissioning and diagnostic functions.
4.1.2
PROFINET IO Interface
OHV-F230-B17 gateways are PROFINET IO devices that communicate cyclically with the
assigned PROFINET IO controller during operation.
The PROFINET interface of the OHV-F230-B17 gateway supports:
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A transfer rate of 100 Mbit/s
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The real-time category RT
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The range of functions in accordance with
Conformance Class B
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The identification and maintenance functions (I&M) IM0
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IM4
Identification & Maintenance Data
Identification and maintenance data (I&M data) is information stored in a device. I&M data
uniquely identifies a device within a system. The identification data (I data) includes information
about the device, for example the item number and device name. Identification data cannot be
changed.
Maintenance data (M data) includes information regarding the device within the system, for
example the installation location and installation date. Maintenance data is initially stored in the
device during installation; this data can be changed.
Data Input
The Step7 software from Siemens can be used to display and change the I&M data. You can
read and write I&M data 1, 2 and 3 in the "Target System" menu of the HW Config hardware
configuration using the functions "Download Module Identification" and "Download Module
Identification to PG".
see Figure 4.1 on page 10.
