Controls/Indicators for an IEEE 1394 and GigE Devices
In the Select Controls/Indicators step of the NI Vision Acquisition Express Wizard, specify the controls and indicators that will be available on the Express VI based on the type of device used.
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Note Refer to the documentation provided by your camera manufacturer for information on specific controls and indicators available with your camera. |
Controls
If you are using a IEEE 1394 or GigE device, the following controls may be available based on your acquisition settings:
| Control |
Description |
| Stop (F) |
Stops the acquisition. This is a required control when performing a continuous acquisition. |
| Number of Image Buffers |
Specifies the number of internal buffers into which image data will be acquired. This is an optional Setup Settings control that only applies the first time the VI is called. |
Indicators
If you are using an IEEE 1394 or GigE device, the following indicators may be available based on your acquisition settings:
| Indicator |
Description |
| All Image Buffers Out |
An array of images allocated by the VI that you can dispose of when the images are no longer in use. This indicator is available when Continuous Acquisition with Acquire Every Image or Finite Acquisition with Inline Processing is selected as the acquisition type. This is a required indicator. |
| Stopped |
This indicator is used to stop a continuous acquisition. It is only available when you are doing a continuous acquisition. This is a required indicator. |
| Image Out |
The reference to the image. This is a required indicator. |
| Image Number |
0-based indicator of how many images have been acquired. This is an optional indicator. |
| Total Images Transferred |
1-based indicator of the total number of images acquired since the beginning of the acquisition. This is an optional indicator. |
| Lost Image Count |
Returns the total number of lost frames in a continuous acquisition. The value increments by 1 each time images are lost. This is an optional indicator. |
| Lost Packet Count |
Returns the number of lost packets during an acquisition session. This is an optional indicator.
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Note This indicator is only available for GigE cameras. |
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| Requested Resend Packet Count |
Returns the number of packets requested to be resent during an acquisition session. This is an optional indicator.
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Note This indicator is only available for GigE cameras. |
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| Received Resend Packets |
Returns the number of packets that were requested to be resent during an acquisition session and were completed. This is an optional indicator.
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Note This indicator is only available for GigE cameras. |
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