16 RAS FUNCTIONS
16.2 Event History Function
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16
Event history settings
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 140 Event
history file)
Navigation window [Parameter] [Module model name] [CPU Parameter] "RAS Setting" "Event History
Setting"
*1 Only FX5U/FX5UC CPU module is supported.
*2 For the FX5S/FX5UJ CPU modules, fixed to 2048K bytes.
An optional battery is required to use the built-in RAM battery keeping. For details, refer to the following.
MELSEC iQ-F FX5S/FX5UJ/FX5U/FX5UC User's Manual (Hardware)
Logging of the event history
This section describes events saving for the event history.
Which event history information is collected
■Target modules
The events collected for the event history are those that occur in the CPU module and in the expansion board, expansion
adapter and intelligent module connected to the CPU module.
The bus access errors that occur in the CPU module when the intelligent function module is connected are
also collected to the event history.
■Target networks
Collection of event history for devices on a network supports only the built-in Ethernet port communication for the CPU
module or intelligent function module. The communication status is a target for the event history.
Events logged by the CPU module
Information logged in the event history includes errors initiator and other detailed information for troubleshooting purposes.
For events that are logged in the event history on the CPU module, refer to Page 849 Event List.
Item Description Setting range Default
Save Destination Specify the storage location of event history files. • Memory Card
• Data Memory
• Built-in RAM Battery Keeping
*1
Data Memory
Storage Capacity
Setting per File
Specify the storage capacity per event history file. • 1 to 2048K bytes (Save Destination: Memory Card)
*2
• 1.5K bytes (fixed) (Save Destination: Data Memory)
• 1 to 64K bytes (Save Destination: Built-in RAM Battery Keeping)
*1
Unit: 1K bytes
1.5 K Byte
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