The general message format is depicted below. The numbers in square brackets are the length of the field in characters. For each record type, there will be a header and checksum block, and a variable parameters field.
HEADER block field definitions class: message type, can have the following two values
SOH (ASCII 01H) Meaning: Data or Control message
ENQ (ASCII 05H) Meaning: Acknowledgement or Negative Acknowledgement count:
(class = SOH) : Length of parameters block
(class = ENQ) : Error code
msgno: message number ('1' thru '7')
The message number of the reply message must equal the message number of the received message
PARAMETERS block field definitions
type: message indentifier
data: message data
Note: only SOH-type messages have a PARAMETERS block
CHECKSUM block field definition
check: sum modulo 16-bit of characters in header and parameters blocks
1.From the START menu, select Run.
2.Type in CMD and press OK. This will open a DOS box.
3.Connect the USB memory stick to an available USB slot in the computer.
4.Select START > My Computer and locate the USB memory stick in the Devices with Removable Storage section. Note the drive that is assigned to the USB memory stick. In the example below , note that drive is (E).
5.Close this window and return to the DOS box
For more detail see the link below: