Glossary-2
ET 200L Distributed I/O Device
EWA-4NEB 780600902-05
Data that belongs together by content is referred to as consistent data.
The data must not be corrupted by being read at different times.
D
The default setting is a basic setting that applies unless another value is set
(i.e. parameterized).
All the properties of a DP slave are stored in a device master file. The format
of the device master file is stored in the IEC 61784-1:2002 Ed1 CP 3/1 stan-
dard.
These are input/output units that are installed in a distributed configuration at
some distance from the CPU rather than in the central rack. For example:
S ET 200L
S ET 200S
S ET 200M
S Other DP slaves manufactured by Siemens or another company
The distributed I/O devices are connected to the DP master via the PROFI-
BUS-DP bus.
Diagnostics is the detection, localization, categorization, indication and anal-
ysis of errors, faults, malfunctions and messages.
Diagnostics provides monitoring functions that run automatically while a
plant is operating. This enhances the availability of a plant by reducing setup
and stoppage times.
A master whose behavior complies with IEC 61784-1:2002 Ed1 CP 3/1 is
referred to as a DP master.
A slave that runs on the PROFIBUS using the PROFIBUS-DP protocol
and whose behavior complies with IEC 61784-1:2002 Ed1 CP 3/1 is referred
to as a DP slave.
The DP standard is the bus protocol of the ET 200 distributed I/O system. It
complies with IEC 61784-1:2002 Ed1 CP 3/1.
Consistent data
Default setting
Device master file
Distributed I/O de-
vices
Diagnostics
DP master
DP slave
DP standard
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