EM-6433 register, Modbus, uno

Using Arduino Networking, Protocols, and Devices
#1

  1. I have to read registers of EM-6433. ( http://tinyurl.com/z7696ys )
    Link above is for data communication with RS485 with Modbus.

  2. This is arduino library which I am using. ( http://playground.arduino.cc/Code/ModbusMaster )

  3. Im EM-6433 default communication is:
    protocol: Modbus RTU
    data bits: 8
    parity: even
    device address:1
    stop: 1

  4. How to read its registers, for example:
    Average current register has address: 3913 & retrun type float

#2