Why are some attributes of 1394 camera Max writable yet Enumerate in LabVIEW Vision as unwritable

I know that this room sees its fair share of issues of setting attribute camera but I hope that it is sufficiently different to justify an exchange of views.

I'm in the middle of a piece of code that used to use IMAQ Legacy 1394 to IMAQdX since NEITHER decided to drop the single 1394 support portage.  I ran into an interesting problem.  When you work with a DCAM 1.3 complient camera (Prosilica E1360C, firewire) I find that it is possible to manually set the Max gain, but when you list the attributes of the camera in LabVIEW using the enumeration Attributes.vi, CameraAttributes::Gain: Value rises only not available in writing.  How did MAX OR move it?  I tried to write the gain using the gain writing Register register manually by referencing the DCAM 1.3 Spec document and then using the Register.vi to write, but I had no luck.  The same is true when you're just trying to write the CameraAttributes::Gain: Value by using the attribute writing property node.

Does anyone have a suggestion?


Tags: NI Hardware

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