I am currently gathering feedback for adding an input counting feedback to the pulse control processor. This will be useful for counting pulses coming from a photomultiplier tube, collecting data over many runs of the same experiment, taking different action based on the pulse counts, or waiting until a particular pulse count has been reached.
The current requirements and design plan for the feature are listed in this wiki page:
http://sourceforge.net/apps/trac/pulse-sequencer/wiki/PCPCountingDevelopment
Feel free to add your own comments to the wiki page (requires a SourceForge account) or e-mail the core team list and we'll make sure your feedback gets added.