Technical data

Diagnostics
3.3 Diagnostic buffer
Commissioning Manual
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
217
● p0779[0...2] Measuring sockets characteristic value x2
● p0780[0...2] Measuring sockets characteristic value y2
● p0783[0...2] Measuring sockets offset
● p0784[0...2] Measuring sockets limit on/off
Display parameters
● r0772[0...2] Measuring sockets output signal
● r0774[0...2] Measuring sockets output voltage
● r0786[0...2] Measuring sockets normalization per volt
3.3 Diagnostic buffer
Description
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
STEP7 Full version
The STARTER device diagnostics function is displayed only when you have installed the full
version of STEP7.