I am trying to control the speed of motor through VFD using 4-20mA signal.
I generate the 4-20mA signal using Arduino.I use low pas filter to obtain the voltages from Arduino PWM pins as shown in the circuit.
Their is continuous deviation at the output.But the deviation is very small.
Example: when Input is 1V(from 20% PWM in Arduino Code)--> Then output continuous to vary between 3mA to 4mA.
when Input is 5V(from 100% PWM in Arduino Code)--> Then output continuous to vary between 19mA to 20mA
Can I implement this circuit practically with VFD?
Will this deviation create problem for VFD to control the speed?
Will this very fast continuous deviation is dangerous for