Siemens SIMATIC ET 200AL System Manual page 939

Distributed i/o system

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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

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.

Agreement on the rules by which the communication between two or more communication

partners transpires.

Point-to-Point, interface and/or transmission protocol for bidirectional data exchange

between two (and only two) communications partners.

Ring topology

All devices of a network are connected together in a ring.

Root CA certificates

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