Counting Module EHC0200 - Period Measuring Mode

[Dars 0]

Hi everyone, I want to be able to read period measure between 1,000 us to 1,000,000 us (1 to 1,000 Hz). My problem is that my VALIDITY bit is cleared when my signal period is lower than 5,000 us. From what I understood in the user manual (http://download.schneider-electric.com/files?p_File_Id=1060793571&p_File_Name=35013355_K01_000_09.pdf), this card can only give one measurement every 5 ms but the shortest period that can be measured is 100 us. I want to have a measure every 20 ms in my M340 periodic task but I suspect that by default the card updates its measurement at every input signal period end. So if the input signal has a period of 4 ms for instance, then a measure update is requested every 4 ms and the card doesn't support it. How can I slow down the update rate so I can read smaller period? See my settings below. I also force "FORCE_SYNC (%Qr.m.c.4)" bit to 1 at any time to enable the measuring update. Thank you!