Ab power flex 40 Modbus tag

Hi all,
I need to interface AB power flex 40 VFD with one third party HMI. I had look on the internet for AB Modbus Registers list & i found only few parameters. I have established the communication but which Modbus address is assigned for setting the frequency? In the internet, i have found 48193 address for Speed ref. But when i check for the same, i found it's a command source. Can anyone share me the details of speed ref. Modbus address in Allen Bradely powerflex 40.

Make sure that the drive parameter P38 is set to '5' to set the communication port as the source of the frequency command. You could also set appropriate bits in Modbus address 48192 to select the port.

We have typically found that the actual address entered in to a Modbus master instruction (at least for Micrologix and AutomationDirect CPUs) must be one higher - to write to the speed reference set the address to 48194.