Profinet participants are therefore addressed by means of the parameters below:
●
Unique MAC address
●
Assigned device names
●
Assigned IP address
Device name and, as an option, also the IP address, is assigned by the software
used for configuration of the network topology, e.g. Siemens Step7/TIA or Proneta
The described address parameters can be read via local display, using the AUMA
CDT service software or any other (e.g. FDI based) configuration and diagnostic
system.
3.3. Configuration of Profinet interface
Configuration of cyclic data transfer is exclusively made via the Profinet controller
which sends the configuration when establishing the cyclic data transfer to the device.
The devices receives the configuration, checks for validity and adapts itself to the
new configuration, provided that it is valid. No settings are made within the device
itself. The configuration procedure depends on the implemented tool.
The number of input and output bytes sent or received by the I/O devices to and
from the controller are predefined within actuator controls.To this end, once the
controller starts cyclic communication, the required communication relations are
negotiated with the I/O device.
3.4. Communication start
After successful device name assignment, the communication channels between
I/O controller and I/O devices are established.The I/O controller creates so-called
Application Relations (AR) between the participants. Communication Relations (CR)
with different properties are defined via these AR:
●
Record Data CR for the acyclic parameter transfer
●
I/O Data CR for the cyclic process data exchange
●
Alarm CR for signalling alarms in real time
With this, all relevant parameters and times for system startup as well as transmission
rates of cyclic I/O data from the I/O controller are transferred to the I/O devices.
After successful establishment of application relations and their communication
relations, the network participants start productive operation.
The Internet Protocol (IP) is used for connection setup and acyclic services. The
Address Resolution Protocol (ARP) is enhanced with the detection of duplicate IP
addresses.The Discovery and basic Configuration Protocol (DCP) is used for IP
address assignation. As an option, DHCP may also be used.
3.5. Communication monitoring
3.5.1. Communication monitoring of Profinet communication
The active Profinet communication is continuously monitored. In case of failure, a
failure behaviour is initiated which can be defined as requested.
3.5.2. Communication status
Correct Profinet communication to the actuator can be checked via local controls
display or via the AUMA CDT service software.The relevant information can be
found in the menu: Diagnostic > Profinet > Communication status > Channel 1 DataEx
and channel 1, or channel 2 activity
●
0 = no communication active
●
1 = communication
Channel 1 or channel 2 activity describes whether data traffic could be detected on
the respective Ethernet port 1 or port 2 and thus whether a correct network connection
was established. However, data does not have to be directly addressed to actuator
controls.
13
Actuator controls
AC 01.2/ACExC 01.2 Profinet Commissioning
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