I have exatly the same problem, in my case I am usin a V350-35-R34 whit a IO-DI16 expansion module. In this case I´m traing to reset the MI 90 (high speed counter) but I cant. I use this same logical to reset another high speed counter connected directly to the PLC and everything is working fine, the problem is just whit the high speed input conected to IO-DI16. Some know what is the problem. Do I need to do some diferent whit the expansion module inputs? I really apreciate your help.