Via Camera Elements, you can capture both still images and video files from a connected USB camera as they are displayed via the controller's HMI.
The captures are stored on the controller's SD card in the folder Media/Camera/BaseName_timestamp.jpg/avi.
To find the camera's supported resolutions:
-PC: connecting the camera to PC and running the command “v4l2-ctl --list-formats-ext” works for many Linux-based cameras, and will return the the supported resolutions, and frame rates of the device.
-PLC: if a USB camera is connected to the PLC at PLC powerup, a log will be created on the SD card in the locations /mnt/sd/Media/Camera/Camera.log
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Parameter Name |
Purpose |
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A |
Image Base Name |
Assign a String ASCII tag to contain the base file name |
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B |
Image Width |
You do not need to provide tags for Width and Height. If Width and Height are both 0, or not set, maximum camera resolution will be used. AOI: if the image is to be used in AOI to compare images, the resolution must be provided, and the only resolution supported is 640 x 480, as shown in the previous image. |
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C |
Image Height |
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D |
Status |
1 = RC in progress 2 = AC in progress 0 = Finished successfully -1 = No camera detected -2 = Invalid resolution selected |
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E |
Generated File Full Name |
Assign a String ASCII tag to contain the generated file name; ensure that the tag comprises sufficient characters |
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Parameter Name |
Purpose |
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A |
Video Base Name |
Assign a String ASCII tag to contain the base file name |
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B |
Recording Time |
Set the number of seconds to record the video from the controller |
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C |
Width |
Valid resolutions: 640x480 or 320x240 (Width x Height) |
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D |
Height |
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E |
Frame Rate |
The minimum frame rate is 5 (less than that it will result in a zero size file) |
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E |
Status |
1 = RC in progress 2 = = AC in progress 0 = Finished successfully -1 = No camera detected -2 = Invalid resolution selected |
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E |
Generated File Full Name |
Assign a String ASCII tag to contain the generated file name; ensure that the tag comprises sufficient characters |