Read High-Speed Capture Status Reads the high-speed position capture status for all axes or encoders. Note  You cannot use this VI to read the status of buffered high-speed captures. Use Check Buffer to get the status of the buffer. Details      Remarks

Device Compatibility Device Compatibility 7330 Y 7340 Y 7344 Y 7350 Y 7390 Y NI SoftMotion Controller for CANopen—Accelnet N NI SoftMotion Controller for CANopen—Xenus N

	Board ID is a unique number assigned by Measurement & Automation Explorer (MAX) used to send and receive commands and data to or from a specific NI motion controller.
	Axis or Encoder is the axis control or encoder control selector. For multi-axis status, use 0 (zero). For multi-encoder status, use 0x20.
	Ret Vect indicates the destination for the return data generated by this VI. Available return vectors include return data to the host (0xFF), return data to a variable (0x01 through 0x78), return data to an indirect variable (0x81 through 0xF8), and do not return data (0). Refer to Input and Return Vectors for more detailed information.
	error in (no error) describes error conditions that occur before this VI runs. The default input of this cluster is no error. If an error already occurred, this VI returns the value of error in in error out. The VI runs normally only if no incoming error exists. Otherwise, the VI passes the error in value to error out. The error in cluster contains the following parameters: status is TRUE if an error occurred before this VI was called, or FALSE if not. If status is TRUE, code is a nonzero error code. If status is FALSE, code is zero or a warning code. code is a number identifying an error or warning. If status is TRUE, code is a nonzero error code. If status is FALSE, code is zero or a warning code. Use the error handler VIs to look up the meaning of this code and display the corresponding error message. source is a string that indicates the origin of the error, if any. Typically, source is the name of the VI in which the error occurred.
	High-Speed Capture Status is the bitmap of capture status for all axes or all encoders. When reading high-speed capture status for axes (Axis or Encoder = 0) or encoders (Axis or Encoder = 0x20), the axis status value are as follows: Axis 1—If true, capture occurred. If false, capture pending or disabled. Axis 2—If true, capture occurred. If false, capture pending or disabled. Axis 3—If true, capture occurred. If false, capture pending or disabled. Axis 4—If true, capture occurred. If false, capture pending or disabled. Axis 5—If true, capture occurred. If false, capture pending or disabled. Axis 6—If true, capture occurred. If false, capture pending or disabled. Axis 7—If true, capture occurred. If false, capture pending or disabled. Axis 8—If true, capture occurred. If false, capture pending or disabled.
	Bd ID Out is provided for flow control. You can string together NI-Motion VIs by wiring the Bd ID Out terminal of one VI to the Board ID terminal of the next VI.
	Resource Output is the Axis, Vector Space, ADC, or Encoder you wired into the VI. Use Resource Output to pass the resource to another VI and/or to display information about the device.
	error out contains error information. If error in indicates an error, error out contains the same error information. Otherwise, it describes the error status that this VI produces. status is TRUE if an error occurred, or FALSE if not. If status is TRUE, code is a nonzero error code. If status is FALSE, code is zero or a warning code. code is a number identifying an error or warning. If status is TRUE, code is a nonzero error code. If status is FALSE, code is zero or a warning code. Use the error handler VIs to look up the meaning of this code and display the corresponding error message. source is a string that indicates the origin of the error, if any. Typically, source is the name of the VI in which the error occurred.

Using This VI

The Read High-Speed Capture Status VI allows you to see if a position capture has occurred or is pending. When configured as a single high-speed capture, the corresponding status bit is set when an input trigger becomes active, as configured in Configure High-Speed Capture. The status bit, along with the captured encoder position, is latched until the input trigger is re-enabled. When the position capture occurs, its status bit is set to True (1). Refer to the Read Captured Position VI for information about retrieving the captured position value.

Example

Executing the Read High-Speed Capture Status VI with Axis or Encoder = 0 returns High Speed Capture Status, as shown in the following table.

Axis 1	Axis 2	Axis 3	Axis 4	Axis 5	Axis 6	Axis 7	Axis 8
False	True	True	False	False	False	False	False

On encoders mapped to axes 2 and 3, high-speed captures have occurred, but all other captures are pending or were never enabled.

Remarks

This section includes information about how the behavior of this VI differs among the controllers that support it.

NI 73xx Controller Considerations

The following list includes considerations you must make when you are using this VI with a 73xx motion controller:

• The high-speed capture circuitry is also used during Find Index execution. When an index is found successfully, the capture status for the corresponding encoder and axis is set to True as a side effect.
• Executing the Find Reference Index VI automatically leaves the corresponding high-speed capture input disabled after the index is found.