Siemens SIMATIC ET 200SP Informasi Produk - Halaman 35

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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