So I have 3 VFDs being run off of a PLC. I am Mechanical and new to this stuff but I think I need 1digital 1analog to each of the motors.. digital for ON/OFF and then the analog is 4-20 so i can control the speed though that, correct? I have external sensors that will be recording the rate and flow of my pumps. I just need to know is 1DO and 1AO each is enough to control the pumps... I am running a Wago PLC and the VFDs are Baldor VS1SP series. Thanks for your time I hope u can help Mech Matt
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