The PowerFlex7000 drive must be configured to disable DPI communications, and enable ScanPort Communications.
The PowerFlex7000 firmware revision where this configuration was implemented is in FRN 5.02. (Contact Rockwell Automation for firmware if required)
To set the drive for ScanPort only, you must set bit 15 high in Parameter 175 "Adptr Loss Mask" and also set the baud rate to 125K in Parameter 147 "Comm Rate".
After setting these parameters, you must then save to NVRAM and cycle the control power to the drive.