dasreset restarts the data-acquisition sub-system (DAsS) after failures. The programs running each data-acquisition channel - the tasks DASn, n = 0..7 - are closed down and restarted and the image-acquisition equipment (the `FOX rack' and `Data-Cell interface') is reset.
dasreset is a much quicker solution than restarting the entire observing-system for problems that are obviously local to the DAsS. The most common example is when the system reports that the image-capture interface has `flooded'. If system displays indicate that some of the DAsS tasks are missing, then dasreset should be able to reload them.
dasreset
dasreset interrupts data acquisition for all detectors on the telescope and looses the images from any detectors currently reading out.