Siemens SIMATIC ET 200AL, System Manual

Page: 1879 / 2255

PROFINET with STEP 7
314
Function Manual, 05/2021, A5E03444486-AL
Glossary
API
API ( A pplication P rocess I dentifier) is a parameter, the value of which specifies the IO data
processing process (application).
The PROFINET standard IEC 61158 assigns profiles to specific APIs (PROFIdrive, PROFIsave),
which are defined by the PROFINET user organization.
The standard API is 0.
Application
An application is a program that runs directly on the MS-DOS/Windows operating system. An
application on the PG is STEP 7, for example.
AR
The AR ( A pplication R elation) comprises all the communication relationships between IO
controller and IO device (e.g. IO data, data records, interrupts).
AR is also an addressing level for diagnostic data records.
Asset
An asset is a component of a machine or plant This can be either hardware or
software/firmware.
Automation system
Programmable logic controller for the open-loop and closed-loop control of process chains of
the process engineering industry and manufacturing technology. The automation system
consists of different components and integrated system functions according to the
automation task.
Backplane bus
The backplane bus is a serial data bus for module intercommunication and the distribution of
the necessary power to the modules. Bus connectors interconnect the modules.
Backup AR
The backup AR is the system redundancy AR between an IO device with system redundancy
S2 and the backup CPU of the redundant S7-1500R/H system.