Hi, I am a attaching a LV8.6 code that i am currently using to control my engine experiment. I use PID control where the input signal is an rpm value that i measure using a counter. The ttl signal from the sensor is not clean and so i use an analog trigger to generate pulses on the counter from where i measure the frequency and hence the rpm. The output is generated as an analog voltage on an output channel. The problem i am facing is that the loop runs really good when i start off but gradually the loop keeps slowing down and this greatly affects my ability to control engine speed. I am not sure why this is happening. I tried increasing the sample size and rate (so as to increase the buffer size) but this didnt have any effect on the speed. I am guessing its a problem with the way i have my loops setup.. any suggestions would be greatly appreciated.
Thanks, Shyam.
