Hi I believe we responded to you on email a while ago, I shall try and answer your query in a bit more detail.
1) The Digital I/O of the ADC 24 has the following spec
Output level, high > 2.40 V
Output level, low < 0.40 V
Input level, high > 2.20 V
Input level, low < 0.88 V
If you write your own software you can use it to count pulses, however this is not what it is intended for.
2)Frequency measurement, in PicoLog, only gives you a measurement of frequency, it works it out by looking at three cycles of a waveform and calculating the frequency from this, I have removed the post as it is not entirely correct.
3) Well you cannot count pulses using our software, however if you wish to write your own software you can trigger to count pulses.
4)If you write your own software you can save your data in whichever format you wish, that is assuming you have the know how.
5-6 I cannot answer these questions however if there is anybody out there who can answer this it would be appreciated.
Finally as I mentioned you would have to write your own software to achive your pulse counting, as I said before this is not the ADC24's intended use, what you really need is a hardware counter, there are plenty of manufacturers out there who specialise in this field. If someone knows anything about hardware counters please feel free to give a helping hand, much appreciated.