PROFINET IO device
Distributed field device that can be assigned to one or more IO controllers (e.g. distributed I/O
system, valve terminals, frequency converters, switches).
PROFIsafe
PROFIsafe (PROcess FIeld safety) is defined for PROFIBUS and PROFINET in the standard
IEC 61784-3.
PROFIsafe is a current standard for secure communication between safety-related devices
and the automation system via the employed fieldbus. The PROFIsafe profile includes both the
format of the user data as well as the protocol for secure communication. PROFIsafe enables
the realization of safety-related automation tasks up to SIL3 (Safety Integrity Level).
Proof-test interval
Period after which a component has to be placed in an error-free state. The component is either
replaced with an unused component, or is proven faultless.
Provider-Consumer principle
Principle of data communication on the PROFINET IO: in contrast to PROFIBUS, both partners
are independent providers when sending data.
Push-in terminal
Terminal for the tool-free connection of wires.
Reaction to CPU STOP
Determines the reaction of the digital outputs to CPU STOP or to failure of communication
between the CFU and CPU.
Modes:
● Turn off
● Keep last value
● Output substitute value 1
Reaction to violation of the high counting limit
For the "Counter" mode, defines the reaction of the counter when the count limit is reached.
Glossary
SIMATIC CFU
212 Commissioning Manual, 08/2019, A5E39252870-AD
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