text: <s>[INST] CCW Micro820 to ATV12 VFD Modbus. I am trying to communicate with a Schneider ATV12 over the embedded serial port on the Micro820 and I am having a bear of a time getting the motor running. According to the ATV12 documentation the control words address is 8501 + 1 = 8502. I am not getting any errors in CCW nor the drive and I know the wiring is right, but the program will not execute. I feel that I might be making a mistake with the LocalAddress array? [/INST] On one of our older product lines we did this all the time (on a Micro850 rather than 820, but the logic should be identical).  We connected a 1761-NC01 to the embedded serial port and wired the drive into that (jump terminal A to TERM, wires on A & B to pins 4 & 5 on the RJ45 at the drive).\n </s>