how can i specific the p.i. value in pump application with ACS580 ( facing high overshooting , oscillating)
i am using ACS580 inverter with booster pump application but the response of the pid is bad always oscillating and overshooting
for example if the setpoint is 4 bar the drive stop while the pressure becomes 6 bar (low response to stop) and at working the water output always decrease and increase not stable also the speed playing
so what is the practical procedure to determine the P value and I value exactly to solve this problem
there is no single and simple way to determine how to perform the PI calibration in a process, and this is because there is no one process unique or the same as another. Each has its own characteristics and requires a careful evaluation, preferably a graphic one.
Given that you must have correctly programmed your drive, remember to always try to make small changes to the parameters of group 40.32 - 40.33 and if necessary, even 40.34.
Activate the monitor and observe very carefully how the quantities involved - for example the number of RPM of the pump and the PID feedback signal - behave with each variation of the parameters I have indicated above. If you have patience and intuition, you will be able to stabilize your process.
Remember that a good theoretical basis - for example searching also on the web the topic "PID regulation" will allow you to better understand the principles of regulation in your drive.
Hope this help you