Siemens SIMATIC S7-1500 Function Manual page 53

Glossary
Parameter assignment
Parameter assignment is the transfer of parameters from the IO controller/DP master to the
IO device/DP slave.
Process image (I/O)
The CPU transfers the values from the input and output modules to this memory area. At the
start of the cyclic program, the CPU transfers the process image output as a signal state to
the output modules. The CPU then reads the signal states of the input modules to the
process image inputs. Next the CPU executes the user program.
Process image partition
In a process image partition, you group input and output data according to its use in the
program and assign the data to an OB.
PROFIBUS
Process Field Bus - European Fieldbus standard.
PROFIBUS DP
A PROFIBUS with DP protocol that acts in conformance with EN 50170. DP stands for
decentralized peripherals (fast, real-time capable, cyclic data exchange). From the
perspective of the user program, the distributed I/O is addressed in exactly the same way as
the central I/O.
PROFINET
Open component-based industrial communication system based on Ethernet for distributed
automation systems. Communication technology promoted by the PROFIBUS User
Organization.
PROFINET IO
Communication concept for the realization of modular, decentralized applications within the
scope of PROFINET.
PROFINET IO is based on switched Ethernet with full-duplex operation and a transmission
bandwidth of 100 Mbps.
PROFINET IO system
PROFINET IO controller with assigned PROFINET IO devices.
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Isochronous mode
Function Manual, 10/2018, A5E43884988-AA