Hi,
I've programmed my VFD to work with Modbus/RS485 in Mach4, it was a good programming/learning excerise but it offed NO
advantage over what I had been doing. I was helping someone else to program, as I say it was fun but otherwise a waste of time.
To modify what you have to work is very straight forward and MUCH MUCH easier than all that programming.
This is why I keep harping on about finding the circuit diagram for the output pin. This could be done with two pieces of wire and one 5 cent
resistor! Does that sound simple enuf. Depending on the circuit diagram you may have to add a transistor, another couple of resistors and maybe
a couple of capacitors if you want some filtering, total parts cost $2.50. If you cant or don't want to use the 10 supply on the VFD you may have to
buy a 5V-15V DC-DC converter for $10.....shock horror!
Could post a few circuit ideas if you wish. Sure would help if PoKeys would allow me to download the 57U manual or you could find that circuit
diagram.
Craig