Siemens SIMATIC ET 200SP Product Information - Page 35

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Siemens SIMATIC ET 200SP Product Information
PROFIsafe address
Every → fail-safe module has a PROFIsafe address. You have to configure the PROFIsafe
address.
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.
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-
 s afe inputs are
made available to the
 s afety 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.
Safe state
The basic principle of the safety concept in F-systems is the existence of a safe state for all
process variables. For the digital F-I/O, for example, the safe state is the value "0".
ET 200SP distributed I/O system
Product Information, 07/2013, A5E32288220-AA
Glossary
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