Bernd, Thank you for contacting National Instruments. One thing to be sure to check when using the Configure Trigger VI is that the "Trigger Mode" is set correctly to the desired behavior. From the brief description you gave, it sounds like Mode 0 (or possibly 1 or 2) will be what you want for your application. By default, the trigger will run off of the falling edge. If you have not had a chance to look over it yet, glance through the help for Configure Trigger VI to see a description of the inputs.
There are also a number of VIs included with the IMAQ 1394 Driver that allow you to programmatically control the camera and set attributes associated with the driver. If you wish to change camera specific attributes, then you can use the IMAQ1394 Write Registers VI (located in the IMAQ IEEE-1394 Low level subpalette) to change register level settings on the camera. You will need the camera documentation in order to know what register and information to write. Depending on the camera, then all of the trigger modes may or may not be supported. The modes outlined in the help are valid for low-active polarity. If your camera needs to be specifically changed with a Trigger_mode control register, then you will need to read that information from Basler and then, if they have a configuration tool use that, or you can use the LabVIEW VIs to modify that register. Regards, Michael Applications Engineer National Instruments
