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Watchdog Set Attribute VI

LabVIEW 8.6 Real-Time Module Help
June 2008

NI Part Number:
370622F-01

»View Product Info

Owning Palette: Advanced Watchdog VIs

Installed With: RT Module

Sets the watchdog object attribute you specify to the value you specify.

This VI coerces the attribute value you specify to the nearest value supported by the watchdog hardware. You can use the attribute value returned indicator to determine the actual attribute value that the VI sets. Refer to the specific RT target hardware documentation for information about supported attribute values.

attribute is the watchdog timer attribute to write. The following are valid attributes:
0Current count—(Read-only) Returns the current value of the watchdog timer. This attribute is not supported on PXI targets.
1Hardware expire—Currently not supported on any targets.
2Hardware ID—(Read-only) Returns the hardware ID number of the watchdog hardware.
3Hardware lock—Sets a Boolean value specifying whether the watchdog hardware configuration has been completed and locked.
4Initial count—Sets the starting value of the counter before the countdown begins.
5Instance—(Read-only) Returns the instance number of the watchdog object you specify using the watchdogID in parameter.
6Resolution—Currently not supported on any targets.
7Time step—Sets the rate at which the counter decrements.
8Whack input source—Sets the trigger line configured as the input for the watchdog hardware.
9Total timeout—Sets the total timeout value (TotalTimeout = InitialCount value * TimeStep value)
watchdogID in specifies a watchdog object.
attribute value is the value to which the specified attribute is set. Time values are specified in microseconds.
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.
attribute value returned is the value of the specified attribute. This value is undefined if the RT target does not support the attribute you specify. This parameter specifies time values in microseconds.
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.

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