User manual

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MS246 User Manual

(success)

<NAK> (fail)

Current Reader Status: 2 bytes of data with one byte of <Reader State> and one byte

of <Pre-Condition>

Reader State – indicates the current state of the reader as follows:

0x00: The reader is waiting for Activate Authentication Mode Command. The

command must be sent before the card can be read.

0x01: The authentication request has been sent, the reader is waiting for the

Activation Challenge Reply Command.

0x02: The reader is waiting for a card swipe.

Pre-condition – specifies how the reader goes to its current state as follows:

0x00: The reader has no card swipes and has not been authenticated since it was

powered up.

0x01: Authentication Mode was activated successfully. The reader processed a

valid Activation Challenge Reply command.

0x02: The reader receives a good card swipe.

0x03: The reader receives a bad card swipe or the card is invalid.

0x04: Authentication Activation Failed.

0x05: Authentication Deactivation Failed.

0x06: Authentication Activation Timed Out. The Host fails to send an Activation

Challenge Reply command within the time specified in the Activate

Authentication Mode command.

0x07: Swipe Timed Out. The user fails to swipe a card within the time specified

in the Activation Challenge Reply command.