Logging Of The Event History - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Displayed items
Item
Save Destination
Set Save Volume of Per File
*1 It cannot be set in the R00CPU.

Logging of the event history

This section describes events saving for the event history.
Modules from which event history information is collected
Event history information is collected from the CPU module and other modules installed on the same base unit (i.e., the main
base unit plus any additional extension base units). Event history information may or may not be collected from devices on the
network depending on the specifications of the network modules used to connect to them. Refer to the manuals of the
respective modules for more information including the coverage of event history collection regarding devices on the network.
For a multi-CPU system, note that each CPU module logs only events detected on the modules under its control.
Events logged by the CPU module
Information logged in the event history includes operation initiator and other detailed information for troubleshooting purposes.
For events that are logged in the event history on the CPU module, refer to the event history ( Page 788 Event List)
Event history file
The storage memory and file size for event history files can be changed in event history setting. ( Page 136 Event history
setting)
■Storage memory
Choose either the data memory or SD memory card.
If the storage memory is the SD memory card: when the write protect switch of the SD memory card is enabled, an event
history will not be stored. (It is possible to read the event history file in SD memory card using the engineering tool.) Therefore,
if the write protect switch of the SD memory card is changed into "Disabled  Enabled" during operation, the write error to the
SD memory card occurs when the event for storing into event history is generated (SD memory card available event is
registered) after the write protect switch is enabled. An error that has occurred can be checked by using the module
diagnostics of the engineering tool immediately after its occurrence. However, these errors are not stored in the event history
after powering off and on or reset of the CPU module.
*1 For the R00CPU, only the data memory can be selected as the storage memory.
• For a system where file writes occur frequently or the communication conditions are unstable and frequently
change, the event history file size should be made large enough to accommodate a greater number of
events. If this is the case, the SD memory card is highly recommended as the storage memory.
• The number of writes to the data memory is limited to 100000 times. Be aware of the number of writes if a
large number of events occur. ( Page 92 Memory Configuration)
Description
Specify the storage location of event history files.
Specify the storage capacity per event history file.
*1
Setting range Default
• Data Memory Data Memory
*1
• Memory Card
1 to 2048K bytes (in 1K bytes) 128K Byte
6 RAS FUNCTIONS
6.4 Event History Function
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