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8 DIAGNOSTIC AND MAINTENANCE FUNCTIONS
8.4 Event History Function
Event history file
The event history file is saved to the system memory of this product.
File size
When the configured file size for the event history file is exceeded, the latest history is saved after deleting the oldest history.
The file size is calculated using the following formula.
• File header size + Event history management information size + Number of records
×
Size per event history record
The following points show the size of each element.
• File header size: 20 bytes
• Event history management information size: 12 bytes
• Size per event history record: 40 to 1,112 bytes
*1
*1 Because there are events that span multiple records in the event history, the file size per record changes.
Conditions for collecting events
This product collects event history regardless of its operating status (stop error, etc.) However, this product may not be able to
collect event history under the following statuses.
• Major error
• Cable failure
Creation timing
Event history files are created at the following times.
• When the power of this product is turned OFF and ON or after a reset of this product (when no event history file exists /
after a change of event history settings)
• initialization
• At registration of event history (no event history file exists)
When a new event history file is created, the event that indicates a new file creation is saved.
Parameter reflection timing
Parameter application is enabled at the following times when the event history file settings were changed.
• Turning the power supply of this product OFF to ON or after a reset of this product
Event history loss
If the event are detected frequently, some events may be dropped. In this case, the event code (*HST LOSS*) which indicates
that the event is dropped is displayed.
If the power is turned OFF or a reset is performed during event history sampling, an event code (*HST LOSS*)
may be displayed under the following statuses.
• When the source is not displayed (source information unknown)
Содержание MELIPC MI5000 Series
Страница 1: ...MELIPC MI5000 Series User s Manual Application MI5122 VW ...
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Страница 18: ...16 MEMO ...
Страница 22: ...20 1 DIAGNOSTIC AND MAINTENANCE FUNCTIONS 1 1 Watchdog Timer WDT Function MEMO ...
Страница 42: ...40 5 iQSS FUNCTION MEMO ...
Страница 146: ...144 11 SECURITY FUNCTION 11 3 IP Filter Function MEMO ...
Страница 148: ...146 12 MELSOFT PRODUCT AND GOT CONNECTION FUNCTION 12 1 Connection Method MEMO ...
Страница 150: ...148 13 SYSTEM COUNT FUNCTION MEMO ...
Страница 152: ...150 14 TIMER EVENT FUNCTION MEMO ...
Страница 160: ...158 15 OS LINKING FUNCTIONS 15 3 Inter OS Event Notification Function MEMO ...
Страница 162: ...160 16 SERIAL INTERFACE SWITCHING FUNCTION MEMO ...
Страница 165: ...17 BASIC PARAMETERS 17 1 Basic Parameter List 163 17 Operation related setting Window ...
Страница 170: ...168 17 BASIC PARAMETERS 17 1 Basic Parameter List RAS setting Window ...
Страница 174: ...172 17 BASIC PARAMETERS 17 1 Basic Parameter List External device connection settings Window ...
Страница 177: ...17 BASIC PARAMETERS 17 1 Basic Parameter List 175 17 External device connection applicable settings Window ...
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