Thank a lot, Martin.
Here I have attached the modified project. Now everything work fine.
Slavcho

Hi colleagues, I try to count pulses from the electric motor by using slotted opto sensor with 2mm to 4mm lead SKU LK6707L. The pulses frequency is about 300 Hz on the scope. I have attached the program which have made. The issue is that the MIAC doesn't count correct at high motor speed as if omit ...