Siemens SIMATIC ET 200SP System Manual page 261

MAC address
Device identification unique worldwide, which is already assigned to each PROFINET device
in the factory. Its 6 bytes are divided into 3 bytes for the manufacturer ID and 3 bytes for the
device ID (serial number). The MAC address is usually legible on the device.
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.
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).
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 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.
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF
(current sinking). The load is connected between the P-
x
Glossary
(current
x
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