VFD controlled from 4/20ma
VFD controlled from 4/20ma
(OP)
I have a Altivar 21 VFD that I would like to use to control a pump. The vfd needs to run based on a 4/20ma input from a transducer directly to the drive. 14ma means the tank is full and the pump should run to avoid overfilling the tank. 4ma means the tank is empty and the pump needs to shut off to avoid sucking air. The tank takes about a half hour to fill and 5 minutes to empty.Does anyone have any advice?





RE: VFD controlled from 4/20ma
RE: VFD controlled from 4/20ma
RE: VFD controlled from 4/20ma
I am not sure I understand the part about setting the 14ma to the (FH) max freq ?
RE: VFD controlled from 4/20ma
Attached is the section out of the manual that explains the (2nd) process.
I haven't used it myself as Schneider are actually one of our main competitors but hey, this is Eng-Tips..
RE: VFD controlled from 4/20ma
I remember sitting in this meeting with the rep and did not know the product. wish I had that time back.
RE: VFD controlled from 4/20ma
Friday I spent over an hour on the phone with tech support and was not able to get such clear and concise information.
RE: VFD controlled from 4/20ma