TF and the wire
Member
I am considering replacing some old invertors with brand new Powerflex 4s. They will have a single phase 230v input and they will have to supply 230v 3 phase to existing motors wired in delta so they are rated at 230v.
The existing invertors are controlled directly from 24v digital outputs from a PLC and I want to configure the new invertors to accept these signals to run/not run and to change the speed from low to high.
This will mean that the PLC 0 volts would have to be connected to all the pin 4s, the digital common terminal. Will this cause a problem, tying all the terminal 4s together?
Can anyone explain what exactly is meant by 2 and 3 wire control as needs to be selected in parameter PO36.
I'll use digital input 1 as the high preset speed, to change from low to high speed.
Can anyone see any flaws in the project?
The existing invertors are controlled directly from 24v digital outputs from a PLC and I want to configure the new invertors to accept these signals to run/not run and to change the speed from low to high.
This will mean that the PLC 0 volts would have to be connected to all the pin 4s, the digital common terminal. Will this cause a problem, tying all the terminal 4s together?
Can anyone explain what exactly is meant by 2 and 3 wire control as needs to be selected in parameter PO36.
I'll use digital input 1 as the high preset speed, to change from low to high speed.
Can anyone see any flaws in the project?