Comparing Offline And Online Cpus; Displaying The Diagnostic Events - Siemens SIMATIC S7-1200 Manual

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8.5 Comparing offline and online CPUs

8.5 Comparing offline and online CPUs
8.6

Displaying the diagnostic events

While the CPU maintains power, up to 50 most recent events are available in this log. When
the log is full, a new event replaces the oldest event in the log. When power is lost, the ten
most recent events are saved.
Each entry includes a date and time the event occurred, an event category, and an event
description. The entries are displayed in chronological order with the most recent event at
the top.
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You can compare the code blocks in an online CPU with the code
blocks in your offline project:
1. Select the offline CPU.
2. Select the "Compare offline/online" command from the "Tools"
menu.
If the code blocks of the offline do not match the code blocks of the
online CPU, the "Compare" editor allows you to synchronize the two
CPU.
Click the "detailed comparison" button to show
the code blocks side-by-side. The detailed
comparison highlights the differences between
the code blocks of online and offline CPUs.
Click the "Action" icon to select
whether to upload, download or take
no action.
Click the "Synchronize" button loads
the code blocks to the designated
CPU.
The CPU provides a diagnostic
buffer which contains an entry for
each diagnostic event, such as
transition of the CPU operating mode
or errors detected by the CPU or
modules.
To access the diagnostic buffer, you
must be online.
Manual, 11/2009, A5E02486774-01
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