Glossary
Distributed I/O system
300
System Manual, 12/2016, A5E03576849-AG
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
Motor starter
Motor starter is the generic term for direct-on-line and reversing starters.
M-switch
Each fail-safe digital output of ET 200SP F-modules consists of a P-switch DO-P
x
(current
sourcing) and an M-switch DO-M
x
(current sinking). The load is connected between the P-
switch and M-switch. The two switches are always activated so that voltage is applied to the
load.
Node
Device that can send, receive or amplify data via the bus, e.g. IO device via PROFINET IO.
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).
Overload release
Overcurrent release that provides protection against overload.
Parameter assignment
Parameter assignment is the transfer of parameters from the IO controller/DP master to the
IO device/DP slave.
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 th
e 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.
Summary of Contents for Simantic ET200SP
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