Omnitron Systems Technology RS-232 - Manual (Page 37)

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Data Fields
By separating decoded data into blocks known as “fields,” each block of data
can be treated individually. Fields can also be added to the data, permitting
user-required characters or function codes to be included.
The fields are identified by a one-character ID starting with the character “A”
(up to and including “Z”) in the order they were created. These fields can then
be sent to the host in the order you specified.
For example, if the credit card data on Track 2 of the magnetic stripe is:
;1234567890123456=9912xxxxxxx?
It is divided into seven fields (A, B, C, D, E, F, and G) as shown below:
;1234567890123456=9912xxxxxxx?
|A| B |C| D | E |F|
If your application software needs the data sent in the following format:
9912
1234567890123456
You can create that format by selecting only the fields you need, reversing
the order in which they are sent to the host, and then creating a new field
to insert after each field.
We do this by using the fields as defined above and adding a new field:
Field B = 1234567890123456
Field D = 9912
Field G =
and then sending {Field D}{Field H}{Field B}{Field G} to the host.