Siemens SIRIUS PROFINET Manual page 116

Glossary
IP address
In order for a PROFINET device to be addressed as an Industrial Ethernet node, it must also
have an IP address that is unique within the network. The IP address consists of 4 decimal
numbers, each ranging from 0 to 255, separated by dots.
The IP address is composed of
● the address of the (sub)network and
● the address of the node (generally called the host or network node)
MAC address
Each PROFINET device is assigned a globally unique device identification at the factory.
This 6-byte device identification is the MAC address.
The MAC address is divided into:
● 3 bytes for the manufacturer identifier and
● 3 bytes for the device identifier (sequential number).
The MAC address can generally be read on the device from the front, e.g.: 08-00-06-6B-80-
C0.
Media redundancy
The PROFINET communication module supports media redundancy according to the Media
Redundancy Protocol (MRP). This function is configured using the configuration tool of the
automation system, e.g., HW Config with STEP 7.
The Media Redundancy Protocol (MRP) enables redundant PROFINET communication
using a ring topology without additional Ethernet switches.
Network Time Protocol
Implementation of a TCP/IP protocol for time synchronization in networks.
The NTP procedure uses hierarchical time synchronization, that is, an external clock (such
as SICLOCK TM or a PC in the network) is used for synchronization.
OCM
Operator control and monitoring
OCM components enable process data to be visualized and systems to be operated.
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PROFINET Communication Module for SIRIUS Soft Starter 3RW44
Manual, 12/2013, A5E31996495002A/RS-AA/001