HIL Watchdog Clear

Owning Palette: HIL/Core/Watchdog

Requirements: Quanser Rapid Control Prototyping Toolkit, LabVIEW 2020 or newer, Control Design and Simulation Module

Description

Clears the watchdog state of a HIL board.

Required Inputs All required inputs must be wired. They appear in bold text in the context help window for the VI.

board in is a reference to a HIL Board instance that represents the open HIL board. This input must be wired to a valid HIL Board signal, as generated by a HIL Initialize VI.

Recommended Inputs Recommended inputs need not be wired. They appear as simple text in the context help window for the VI.

error in describes error conditions occurring before the VI executes. If an error has already occurred, the VI returns the value of the error in cluster in error out.

status is TRUE if an error occurred. If status is TRUE, the VI does not perform any operations.

code is the error code number identifying an error. A value of 0 means no error, a negative value means a fatal error, and a positive value is a warning. Refer to the Quanser Error Codes for a code description.

source identifies where an error occurred. The source string is usually the name of the VI that produced the error.

Outputs

board out is a copy of the HIL Board instance passed to the board in input.

error out contains error information. If the error in cluster indicated an error, the error out cluster contains the same information. Otherwise, error out describes the error status of this VI.

	status is TRUE if an error occurred. If status is TRUE, the VI does not perform any operations.
	code is the error code number identifying an error. A value of 0 means no error, a negative value means a fatal error, and a positive value is a warning. Refer to the Quanser Error Codes for a code description.
	source identifies where an error occurred. The source string is usually the name of the VI that produced the error.

Details

When a board is in the watchdog state it is not possible to write to the outputs. Clearing the watchdog state allows the outputs to be written once again. The watchdog state prevents a VI from overwriting the outputs and negating the safety benefit of watchdog timer expiring. The Watchdog Clear VI allows a diagram to recover from watchdog expiry and resume operation.

Feedthrough Behaviour

All input/output pairs of this function have direct feedthrough behaviour.

Examples

There are currently no examples

Targets

Target	Supported	Comments
RCP Windows (64-bit) Target	Yes	Fully supported.

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	HIL Watchdog Reload	Reloads the watchdog timer. If the watchdog had already expired then it does not clear the expiration state. The watchdog must be cleared in order to begin writing to the outputs again.
	HIL Watchdog Start	Starts the watchdog timer. If the watchdog timer is allowed to expire then it resets all the outputs of the data acquistion cards to the programmed expiration states.