Siemens SIMATIC ET 200AL, System Manual

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Glossary
Distributed I/O system
System Manual, 08/2021, A5E31861578-AJ
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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.
P-switch
→ M-switch
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.
Reference potential
Potential from which the voltages of the circuits involved are observed and/or measured.
Reintegration
After the elimination of a fault, it is necessary to ensure the reintegration (depassivation) of
the → F-I/O. Reintegration (switchover from fail-safe values to process values) occurs either
automatically or only after a user acknowledgment in the safety program.
In the case of a fail-safe input module, the process values pending at the fail-
safe inputs are
made available to the safety program again after reintegration. In the case of a fail-safe
output module, the → fail-safe system transfers the output values in the safety program to
the fail-safe outputs again.
RIOforFA-Safety
Remote IO for Factory Automation with PROFIsafe; Profile for F-I/O