I want to control the pressure of the exhaust fan controlled by ACS850 ABB drive.motor start at 9000rpm then pid
Voted best answer
make one backup copy of your actual program in the drive.
you can do it, the drive would be started in mode constant speed, using one of the inputs to set the speed at 900 rpm - refer the FW instruction of manual for the parameter group 26-.
The digital input that you define for the constant speed overrides the reference.
When the constant speed at 900 rpm is reached take away the input that define the constant speed and start regulation with the analog reference and transducer of pressure, how you have define it in parameter group 13.
Then you have to define in group 27 the PID function and set in parameter group 21 the origin of reference, in this case from PID.Hope this help you, let us know about the results
your question is not so clear explain.....could you specify what do you need from the drive with pid control?
Do you have transducer of pressure/volume connected to the 2nd analog input of the drive?
What function do you need?
Do you have a PLC that controls the inverter ACS850?
Are you sure about the 9000 rpm?
What about of the electrical motor you're using?
What problem you're having with the drive?
If you give us more information we can help you better