Siemens Simatic 6ES7 157-0AC80-0 A0 Series, Manual

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Glossary
Glossary-2
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Diagnostic interrupt
Diagnostics-capable modules use diagnostic interrupts to report system errors
that they have detected to the central CPU.
In SIMATIC S7/M7: When an error is detected or disappears (e. g. wire break),
the module triggers a diagnostic interrupt, provided the interrupt is enabled. The
CPU interrupts the processing of the user program and lower priority classes,
and processes the diagnostic interrupt block (OB 82).
In SIMATIC S5: The diagnostic interrupt appears in the station diagnosis. Using
cyclical querying of the diagnostic bits in the station diagnosis, you can detect
errors such as a wire break.
Diagnostics
Diagnostics is the detection, localization, classification, display and evaluation of
errors, faults and messages.
Diagnostics provides monitoring functions that run automatically while the system
is in operation. This increases the availability of systems by reducing
commissioning times and downtimes.
DP master
A
³
master that behaves in accordance with IEC 61784-1:2002 Ed1 CP 3/1 is
referred to as a DP master.
DP slave
A
³
slave run on the PROFIBUS bus system with the PROFIBUS-DP protocol
that behaves in accordance with the IEC 61784-1:2002 Ed1 CP 3/1 is referred to
as a DP slave.
DP standard
The DP standard is the bus protocol of the distributed I/O system in accordance
with IEC 61784-1:2002 Ed1 CP 3/1.
DPV0
Cyclical data exchange between the higher level system and slaves
Configuration by means of device master files
Diagnostics