Siemens SIMATIC ET 200SP Productinformatie - Pagina 34

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Siemens SIMATIC ET 200SP Productinformatie
Glossary
F-monitoring time
→ PROFIsafe monitoring time
F-Systems
→ fail-safe systems
Module fault
Module faults can be external faults (e.g. missing load voltage) or internal faults (e.g.
processor failure). Internal faults always require module replacement.
Monitoring time
→ PROFIsafe monitoring time
M-switch
Each fail-safe digital output of ET 200SP F-modules consists of a P-switch DO-P
sourcing) and an M-switch DO-M
switch and M-switch. The two switches are always activated so that voltage is applied to the
load.
Nonequivalent sensor
A nonequivalent → sensor is a two-way switch that is connected to two inputs of an → F-I/O
(via 2 channels) in → fail-safe systems (for → 1oo2 evaluation of sensor signals).
Passivation
If an → F-I/O module detects a fault it switches either the affected channel or all channels to
a → safe state, i.e. the channels of this F-I/O module are passivated. The F-I/O module
signals the detected faults to the → F-CPU.
When passivating channels at F-I/O with inputs, the → F-System provides fail-safe values for
the → safety program instead of the process values pending at the fail-safe inputs.
When passivating channels at F-I/O with outputs, the F-system returns fail-safe values (0) to
the fail-safe outputs instead of the output values provided by the safety program.
Performance Level
Performance Level (PL) according to ISO 13849-1:2006 or EN ISO 13849-1:2008
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.
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(current sinking). The load is connected between the P-
x
Product Information, 07/2013, A5E32288220-AA
(current
x
ET 200SP distributed I/O system