Hello!
I have a PowerFlex 40D Variable Frequency Drive and I want to control it with Arduino. I'm really confuse of where to connect the two wires (+ and -) of the TTL to RS485 module to the VFD terminals. Here is the manual of the VFD:
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/22d-um001_-en-e.pdf
The information about RS485 wiring can be fount at page 149.
Some help with this?