Event History Function; Event History Setting - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

6.4

Event History Function

RnPCPU
RnCPU RnENCPU
(Process)
• When using the SIL2 Process CPU, refer to the following as well.
Page 605 FUNCTIONS
• When using the Safety CPU, refer to the following as well.
Page 535 FUNCTIONS
The CPU module collects and stores event information from each module, such as errors detected by the module, operations
performed on the module, and network errors.
This function helps to determine the causes of problems that have occurred in the equipment/devices, check the update
status of the programmable controller control data, and detect unauthorized access.
The information of events that occurred in the host
CPU module and modules which are managed by
the host CPU module are sampled by the CPU
module in a batch and saved.
*1 If the CPU module is operated online using the engineering tool, there are times when processing performed automatically by the
system is saved as an event.
The event history information is constantly collected regardless of the operating state of the CPU module.
There are occasions, however, when the event history information cannot be collected due to a major error in
a module, a base unit error, a cable failure, or some other cause.

Event history setting

Under normal circumstances, the event history function can be used with its default settings and need not be manually
configured. The storage memory and size settings for event history files can be changed as needed. ( Page 137 Event
history file)
[CPU Parameter]  [RAS Setting]  [Event History Setting]
Window
6 RAS FUNCTIONS
136
6.4 Event History Function
RnPCPU RnPSFCPU RnPSFCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety) (Standard)
*1
(Safety)
Once errors and operations are stored, they can be checked chronologically.
Engineering tool
The event information that is held in the CPU
module is displayed with an engineering tool.