Good morning Meden,

In “Nano Basics Extended Edition” I show how to communicate to the PowerFlex 4m via Modbus (lesson 4.6), and PowerFlex 525 via Ethernet (lesson 4.7), both by using Rockwell's free sample code.

The UDFB (User Defined Function Blocks) I use in these lessons “reads” the Status Bits and Actual Speed, and “writes” to the Control Bits and Speed Reference.

That said, there other sample blocks which read or write to a single or multiple registers, however I don't cover them as of yet but it is something I could add… which registers are you trying to read or write to?

Sincerely,

Shawn Tierney