Mitsubishi Electric MELIPC MI5000 Series User Manual page 21

Monitoring start and reset
This section shows the timing to start and reset monitoring a watchdog timer.
Function name
Windows part System watchdog timer
Reset interval of system watchdog timer
The system watchdog timer is reset by the system at fixed cycles. However, the reset time interval may be longer than the
prescribed cycle due to the execution of an interrupt program or other issue. The time taken for a reset
the buffer memory. ( Page 282 List of Buffer Memory)
*1 Time for the initial reset after the power supply of this product was turned ON, or time from a reset of the watchdog timer to the next
reset.
Operation during a timeout of the watchdog timer
This section shows the operating statuses during a timeout of the watchdog timer.
If the watchdog timer is timed-up, this provides a notification displaying an error (a watchdog timer error) to the effect that a
time in excess of that set in watchdog timer monitoring settings has elapsed.
The following table lists the LED display and operation statuses that change due to a timeout of the watchdog
timer. LED display and operation statuses other than those listed do not change due to a timeout.
Function name
Windows part System watchdog timer
Description
The system automatically starts monitoring, and resets using periodic processing. The system can
acquire the actual measured value of the time interval to reset the system watchdog timer. (
Page 19 Reset interval of system watchdog timer)
If system processing has been suspended for a long time because of a hardware failure of this
product or execution of an interrupt program, a watchdog timer timeout occurs. ( Page 19
Operation during a timeout of the watchdog timer)
Description
■Operating status
• Windows restart determination(Page 95 Self Diagnostics Function)
• Notification of error (watchdog timer error)
■LED status
• MAIN ERR LED: On
1 DIAGNOSTIC AND MAINTENANCE FUNCTIONS
*1
can be checked by
1.1 Watchdog Timer (WDT) Function
1
19