You are here: NI Home > Support > Product Reference > Manuals > LabVIEW 8.6 Real-Time Module Help

Owning Palette: Real-Time Watchdog VIs

Installed With: RT Module

Resets the watchdog counter to the value you specify using either the Watchdog Configure VI or the Watchdog Set Attribute VI.

Details  Example

	watchdogID in specifies a watchdog object.
	reset watchdog after expire? determines whether a whack after the watchdog timer has expired resets the watchdog timer. The default value is FALSE, which specifies that the watchdog timer remains expired after the first expiration.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	watchdogID out has the same value as watchdogID in.
	watchdog status is the current status of the watchdog timer. The watchdog status output can return the following values: 0 disabled 1 expired 2 running
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Watchdog Whack Details

If the countdown of the watchdog timer has not yet started, this VI starts the countdown. If the current status of the watchdog object is running or disabled, this VI restarts the countdown of the watchdog timer. If the current status of the watchdog object is expired, this VI restarts the countdown of the watchdog timer only if you set reset watchdog after expire? to TRUE.

Example

Refer to the Watchdog Reset - RT Engine VI in the labview\examples\Real-Time\RT Watchdog (PXI).llb for an example of using the Watchdog Whack VI.