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Glossary
Device-Related
Diagnosis
Diagnostics
Distributed I/O
Devices
DMD File
DP
DP Connection
DP Master
DP Master
Diagnosis
DP Slave
Glossary-2
Highest level of the slave-specific DP diagnosis: the device-related diagnosis
relates to the entire slave.
With CP 541, the device-related diagnosis merely contains the information
on whether or not the connected programmable controller has failed.
Diagnostics covers the detection, locating, classifying, indicating and further
evaluation of errors, interference and messages.
Diagnostics offers monitoring functions which are executed automatically
during system operation. The availability of the system is thus increased by
reducing the startup and down-times.
Within the distributed periphery (I/Os), there are various diagnostic facilities:
from the summary showing which DP slave has reported a diagnosis, to the
monitoring of an individual input/output.
Distributed peripherals are input/output units in a distributed configuration,
and not used in the CPU. For example:
ET 200 family
S5-95U with SINEC L2-DP interface
CP 541
Other DP slaves from Siemens or non-Siemens devices
Distributed I/O devices are connected to the DP master via the SINEC L2-DP
bus.
All DP slave-specific characteristics are stored in a DMD file (device master
data file). The format of the DMD file can be found in Standard DIN E
19245, Part 3.
DP stands for distributed peripherals.
The CP connection is a connection between a DP master and a DP slave in
compliance with the DP standard.
An active station which communicates with the DP slave stations accord-
ing to a defined algorithm, and makes data available to the user. It acts ac-
cording to Standard DIN E 19245, Part 3.
The master diagnosis indicates the diagnostic data for the DP master; for ex-
ample, which DP slave has a diagnostic message.
DP standard slave
Communications Processor CP 541
EWA 4NEB 812 6188-02
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