Online and diagnostic tools
14.9 Displaying diagnostic events in the CPU
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
793
Displaying diagnostic events in the CPU
Use the diagnostics buffer to review the recent activity in the CPU. The diagnostics buffer is
accessible from "Online & Diagnostics" for an online CPU in the Project tree. It contains the
following entries:
● Diagnostic events
● Changes in the CPU operating mode (transitions to STOP or RUN mode)
The first entry contains the latest event.
Each entry in the diagnostic buffer
contains the date and time the event
was logged, and a description.
The maximum number of entries is
dependent on the CPU. A maximum of
50 entrie
s is supported.
Only the 10 most recent events in the
diagnostic buffer are stored
permanently. Resetting the CPU to the
factory settings resets the diagnostic
buffer by deleting the entries.
You can also use the GET_DIAG instruction (Page 358) to collect the diagnostic information.
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