Siemens SIMATIC S7-1500 Automation System System Manual page 203

PROFINET component
A PROFINET component includes the entire data of the hardware configuration, the
parameters of the modules, and the corresponding user program. The PROFINET
component consists of:
● Technological function
● Device
PROFINET IO
Communication concept for the realization of modular, distributed applications within the
scope of PROFINET.
PROFINET IO controller
Device used to address connected I/O devices. This means that: The IO controller
exchanges input and output signals with assigned field devices. The IO controller often
corresponds to the controller in which the automation program is running.
PROFINET IO device
A distributed field device that is assigned to an IO controllers (e.g., remote IO, valve
terminals, frequency converters, switches).
Provider-Consumer principle
Principle of data communication on the PROFINET IO: in contrast to PROFIBUS, both
parties are independent providers when sending data.
Reference potential
Potential from which the voltages of the circuits involved are observed and/or measured.
SELV
Safety Extra Low Voltage = Safety Extra Low Voltage
Slave station
A slave may only exchange data with a master after being requested to by the master.
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
The (optional) technological (software) function comprises the interface to other
PROFINET components in the form of interconnectable inputs and outputs.
The device is the representation of the physical automation device or field device
including the I/O, sensors and actuators, mechanics, and device firmware.
Glossary
203