Glossary
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
138 Operating Instructions, 09/2016, A5E35873416-AA
The IP address is made up of four decimal numbers with a range of values from 0 through
255. The decimal numbers are separated by a dot (e.g. 192.162.0.0).
The IP address consists of the following:
● Address of the network
● Address of the device (PROFINET interface of the IO controller/IO device)
Process data, transmission cycle via PROFINET IO and user program are synchronized to
achieve maximum deterministic behavior. The input and output data of distributed I/O
modules in the system is simultaneously acquired and simultaneously output.
Isochronous real-time communication
Synchronized transmission method for cyclic exchange of IRT IO data between PROFINET
devices.
A reserved bandwidth within the send clock is available for IRT IO data. The reserved
bandwidth guarantees that the IRT IO data can be transmitted in reserved, time-
synchronized intervals and not be influenced by high network load arising from other
communication (e.g. TCP/IP communication or additional real time communication).
Supply of the module's input and output electric circuits.
Every PROFINET device is assigned a worldwide unique device identification before it
leaves the factory. This 6-byte long device identification is the MAC address.
The MAC address is divided into:
● 3-byte manufacturer identification
● 3-byte device identification (consecutive number)
The MAC address is generally shown on the front of the device.
Example: 08-00-06-6B-80-C0
Function for ensuring the network and system availability. Redundant transmission paths
(ring topology) ensure that an alternative communication path is made available if one
transmission path fails.
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