STOBER
10 | More on PROFINET?
11/2019 | ID 442710.03
47
10.4
Communication protocols
...
HTTP
SNMP
DHCP
Standard data
Real-time
data
TCP/UDP
IP
Real-time
protocol
Fast Ethernet
PROFINET applications
IT applications
Fig. 13: PROFINET communication protocols
One protocol optimized for fast Ethernet is suitable for real-time communication: the real-time protocol.
It allows for a high-performance transfer of cyclical real-time data and event-driven messages.
Standard PROFINET data without a real-time request, such as parameter values or diagnostic data, is usually transferred
using the
protocols. For typical IT applications such as the transfer of websites, e-mails, etc., PROFINET
relies on standard IT protocols such as HTTP or SNMP.
10.5
Ethernet network addressing
All PROFINET IO nodes are based on the Industrial Ethernet Standard, meaning that the assignment of the following
addresses and names is important to be able to communicate with IO devices in the PROFINET IO system.
10.5.1
MAC address
Each network interface of a device in an Ethernet network requires its own address—a MAC address. The MAC address is
used as a source and destination address for cyclical data exchange.
A MAC address consists of a fixed and a variable part. The fixed part identifies the manufacturer (3 bytes) and the variable
part distinguishes the individual Ethernet nodes and must be globally unique (also 3 bytes). A MAC address can only
communicate between two nodes of the same subnet.
The MAC addresses of the interfaces are issued by STOBER and cannot be changed.
Information
The MAC address range of the STOBER hardware is: 00:11:39:00:00:00 – 00:11:39:FF:FF:FF
You can read out the MAC address of the PROFINET interface using the A279 PN MAC addresses parameter.
