7
3-7
Retrying and Verifying
The visual card reader/writer will retry to read or to write to a card when it fails to read or write
data to the magnetic stripe. (This is when a retry count is set.)
When the set number of failures to read or to write is reached, reading or writing is canceled.
The device rereads the magnetic stripe after writing thereto. If the data that it reads does not
match the data that was written, it detects a writing error.
This reading of the data is called ‘verifying' and is performed automatically.
The initial values for retries is set to two times (total of three).
3-8 Reading
the
Buffer
It is possible to read the buffer when a card that has been read/written is idling. The buffer
read command obtains the read data stored in the read buffer on the visual card reader/writer.
It is possible to get the read data on the track without transporting a card by using the buffer
read command. The result is high speed reading of the card.
The card will be transported and read if the card is not idling or by using the buffer read
command when the read/write operation has not been performed before executing the buffer
read command.
This buffer read command is a similar operation to the read cache.
