Mitsubishi Electric MELIPC MI5000 Series User Manual page 100

8.2
Watchdog Timer (WDT) Function
This function detects errors of hardware and user applications (used programs) of this product.
Watchdog timer types
The watchdog timer runs on the VxWorks part as follows.
The watchdog timers of the Windows part and VxWorks part run independently. For the watchdog timer of the
Windows part, refer to the following page.
Page 18 Watchdog Timer (WDT) Function
Function name
VxWorks part System watchdog timer
User watchdog timer
*1 Time-up errors may be detected from hang-ups of the user application.
Monitoring time setting
This section shows the method for setting a watchdog timer monitoring time.
System watchdog timer
A system watchdog timer can be set in "System WDT Setting" of "WDT(Watchdog Timer) Setting (VxWorks part)".
Window
[Basic Parameter]  [RAS Setting]  [WDT (Watchdog Timer) Setting (VxWorks part)]
Displayed items
Item
Monitoring time
User watchdog timer
Set the user watchdog timer by using the C Controller module dedicated function (CCPU_StartWDT).
Set a monitoring time for the user watchdog timer within the range of 100 to 10,000 ms (in 10 ms units).
The user watchdog timer does not run if it is not configured by the C Controller module dedicated function
(CCPU_StartWDT).
■Function list
Function name
CCPU_StartWDT
CCPU_ResetWDT
For details on the C Controller module dedicated functions, refer to the following manual.
MELIPC MI5000 Series Programming Manual (VxWorks)
8 DIAGNOSTIC AND MAINTENANCE FUNCTIONS
98
8.2 Watchdog Timer (WDT) Function
Description
Detects problems (system hang-ups, etc.) in the system programs of the VxWorks part stemming
from hardware abnormalities.
Detects invalid statuses (system hang-ups, occupation of processing, etc.) of user applications of
the VxWorks part.
Description
Set the system watchdog timer monitoring time.
Description
Sets the user WDT of the VxWorks part and starts the user WDT.
Resets a user WDT of the VxWorks part.
*1
Setting range
20 to 2000 [ms](10 ms units)
(Default: 1,000 ms)