Siemens SIMATIC ET 200AL, System Manual

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Glossary
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC
95
Device
In the PROFIBUS environment, "device" is the generic term for:
●
Automation systems (for example, PLC, PC)
● Distributed I/O systems
● Field devices (for example, hydraulic devices, pneumatic devices)
● Active network components
● Gateways to AS interface or other fieldbus systems
Device that can send, receive or amplify data via the bus, for example, a DP slave by means
of PROFIBUS DP.
Diagnostics
Monitoring functions for the recognition, localization, classification, display and further
evaluation of errors, faults and alarms. They run automatically during plant operation. This
increases the availability of systems/plants by reducing commissioning times and
downtimes.
DP master
CPU or device that conducts the communication with the DP slaves according to a defined
algorithm. To do this, the DP master uses the functions for communication with the DP
slaves which are defined by PROFIBUS DP. It acts according to standard EN 50170, Part 3.
→
Master
DP slave
Slave in the distributed I/O that is operated on the PROFIBUS with PROFIBUS DP protocol
and acts according to standard EN 50170, Part 3. The DP slave is addressed by the DP
master and provides it with specified functions (I/O data, diagnostics, etc.).
→
Slave
DPV1
The designation DPV1 refers to the functional extension of acyclic services (to include new
interrupts, for example) provided by the DP protocol. The DPV1 functionality is integrated in
IEC 61158/EN 50170, Volume 2, PROFIBUS.
FDL
Fieldbus Data Link (bus access protocol). Step 2 with PROFIBUS.
HMI device
Human Machine Interface, device for visualization and control of automation processes.