Siemens SIMATIC ET 200AL, System Manual

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Glossary
Communication
436
Function Manual, 05/2021, A5E03735815-AJ
PROFINET
Open component-based industrial communications system based on Ethernet for distributed
automation systems. Communications technology promoted by the PROFIBUS user
organization.
PROFINET device
Device that always has a PROFINET interface (electrical, optical, wireless).
PROFINET interface
Interface of a module capable of communication (for example CPU, CP) with one or more
ports. A MAC address is assigned to the interface in the factory. Along with the IP address and
the device name (from the individual configuration), this interface address ensures that the
PROFINET device is identified uniquely in the network. The interface can be electrical, optical
or wireless.
PROFINET IO
IO stands for input/output; distributed I/O (fast, cyclic data exchange with real-time
capability). From the perspective of the user program, the distributed I/O is addressed in
exactly the same way as the centralized IO.
PROFINET IO as the Ethernet-based automation standard of PROFIBUS & PROFINET
International defines a cross-vendor communication, automation, and engineering model.
With PROFINET IO, a switching technology is used that allows all devices to access the
network at any time. In this way, the network can be used much more efficiently through the
simultaneous data transfer of several devices. Simultaneous sending and receiving is enabled
via the full-duplex operation of Switched Ethernet.
PROFINET IO is based on switched Ethernet with full-duplex operation and a bandwidth of
100 Mbps.
Programming device
Programming devices are essentially compact and portable PCs which are suitable for
industrial applications. They are identified by a special hardware and software configuration
for programmable logic controllers.
Protocol
Agreement on the rules by which the communication between two or more communication
partners transpires.
PtP
P oint- t o- P oint, interface and/or transmission protocol for bidirectional data exchange
between two (and only two) communications partners.