Wrong address in Modbus integration

ESPHome
1

Hey.
so when I set this as my sensor

sensor:
  # General
  - platform: modbus_controller
    modbus_controller_id: SDM72DM
    name: AvgFreq
    register_type: read
    address: 0x0006
    value_type: FP32
    unit_of_measurement: Hz
    state_class: "measurement"
    accuracy_decimals: 3

I get an error message where it says

 Modbus command to device=1 register=0x06 countdown=0 no response received - removed from send queue

Is this correct? 0x06 is not 0x0006