Diagnostic Buffer - Siemens SINAMICS S120 Commissioning Manual

Diagnostics

3.3 Diagnostic buffer

3.3 Diagnostic buffer
A diagnostic buffer mechanism has already been implemented in the SIMATIC S7
environment. It can record important operational events in the automation system as a kind
of log book (restriction: The availability of the diagnostics buffer mechanism is also
dependent on the hardware release of the Control Unit).
The diagnostic buffer is in the non-volatile memory, so data written to it can be read out for
subsequent analysis of a malfunction (including pre-history).
The essential events recorded in the buffer are:
● Faults
● Important changes to the boot status (end status) and partial booting of DOs
● Commissioning procedures
● State change of PROFIBUS/PROFINET communication
● Exceptions
The entries in the diagnostic buffer can be called up via the drive unit properties (symbol in
project navigator --> right mouse-click) under the menu option "Target device" > "Device
diagnostics".
Note
STEP 7 full version
Device diagnostics in the STARTER commissioning tool is only displayed when you have
installed the full version of STEP7.
Events recorded by the diagnostic buffer
The following list shows the entries defined for SINAMICS drive units. Additional information
is marked with <>.
Faults
An entry is defined for each possible DO number. The fault code and fault value are entered
in the additional information.
Example:
Fault DO 5: Fault code 1005 fault value 0x30012
Alarms are not saved in the diagnostic buffer. Propagated faults (faults which are signaled to
all DOs) are only stored in the diagnostic buffer once.
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Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual