Glossary
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
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PROFIsafe
Safety-oriented PROFINET I/O bus profile for communication between the → safety program
and the → F-I/O module in a → fail-safe system.
PROFIsafe address
The PROFIsafe address (code name according to IEC 61784-3-3: 2010) is used to protect
standard addressing mechanisms such as IP addresses. The PROFIsafe address consists
of the F-source address and F-destination address. Every → fail-safe module therefore has
two address portions, the F-source address and the F-destination address.
The PROFIsafe address must be configured in the hardware and network editor.
PROFIsafe monitoring time
Monitoring time for safety-related communication between the F-CPU and F-I/O
Proof-test interval
Period after which a component must be forced to fail-safe state, that is, it 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
parties are independent providers when sending data.
P-switch
→ M-switch
Push-in terminal
Push-in connections are a form of spring-loaded terminals allowing wiring without tools for
rigid conductors or conductors equipped with end sleeves.
Redundancy, availability-enhancing
Multiple instances of components with the objective of maintaining component functionality in
the event of hardware faults.
Redundancy, safety-enhancing
Multiple availability of components with the aim of exposing hardware faults based on
comparison; such as → 1oo2 evaluation in → fail-safe modules.
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