33 TROUBLESHOOTING PROCEDURE
33.2 Troubleshooting Using the Engineering Tool
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Event history
This function displays the event information, such as errors occurred in the module(s) mounted, executed operations, and
network errors.
Since information collected before the CPU module is powered off or reset can also be displayed, the error cause can be
identified based on the past operations and errors.
The displayed information can also be saved in CSV file format.
[Diagnostics] [System Monitor] [Event History] button
Use this function for the following purposes:
• To check the error status and identify the cause of error occurred in machinery or equipment
• To check when and how the program and parameters of the programmable controller have been changed
• To check for unauthorized access
For details on this function and collected information, refer to the following.
Page 211 Event History Function
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