10 FUNCTIONS
10.9 Event History Function
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10.9
Event History Function
This function collects errors that occurred in the I/O module with diagnostic functions and executed operations as event
information in the remote head module.
Information of an event that occurred in the I/O module with diagnostic functions is collected by the remote head module and
held inside the data memory in the remote head module.
Event information collected by the remote head module can be displayed using the engineering tool, and occurrence histories
can be checked in chronological order.
Setting procedure
Set the event history function in the event history setting window of the engineering tool. For the setting procedure, refer to the
following.
MELSEC iQ-R CPU Module User's Manual (Application)
Display of the event history
Display the event history from the menu of the engineering tool. For details on the operating procedure and display
description, refer to the following.
GX Works3 Operating Manual
Event type
Classification
Description
System
Error
Self-diagnostics error detected in each module
Alarm
Alarm detected in each module
Information
Operation normally detected by the system not classified as an error or alarm, or operation performed
automatically by the system.
Security
Alarm
The operation which is judged as unauthorized access to each module
Information
Operation that could not be judged as a successful unlock of an password or unauthorized access
Operation
Alarm
Among operations performed on modules, delete operation (data clear) that is not judged as an error by self-
diagnostics but likely to change the behavior
Information
Operations performed by users including operations which changes system behavior, such as error clear, and
operations which changes the structure
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