phuz
Member
I just installed 3 PowerFlex 755 VFDs for a customer's fresh water booster pumps, and converted the three PowerFlex 400 well pump VFDs over to Ethernet, and all control is done via a 5069-L306ER. Given the critical nature of the systems (needs 24/7 uptime), we are examining all possible failures, including losing the PLC. One of the options would be putting HOA switches on the door, but I've never done this when using Ethernet. Is there a way to provide a quick switch in the event we lose the PLC control source without needing to change 'Start Source' and 'Speed Source' in the VFD parameters?