User's Manual

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4-6 Status
(1) Command satus
This is a message given from the host to the reader. It is used to modify a reply for communication or the
whole command.
It is represented by 8 bits (1 byte), each bit having its own meaning.
Name Description
D7 Verify The host requests a response to the reader.
D6 ACK The host acknowledges the acceptance to the reader.
D5 STM Switches the communication mode with the host.
0: Realtime mode Requests a prompt reply to a command.
1: Polling mode A response to a command is withheld and requested at another
time by data request by "Verify".
D4 ATM Used when an indicator is connected.
0: Data is not sent to the indicator
1: Data is sent to the indicator
D3 NGU Turned on when judgment by the host is NG.
D2 OKU Turned on when judgment by the host is OK.
The host notifies the RF interface of
the result of judgment.
D1 “0”: NOP
D0 EXT When the communication mode is "Continue", reading and writing can be executed
in synchronization with EXT inputs of the reader by setting this to "1".
(2) Response status
This is a message given from the reader to the host. It is used to send a reply for communication or the
hardware status of the reader. It is represented by 8 bits (1 byte), each bit having its own meaning.
Name Description
D7 “0”: NOP
D6 ACK Acknowledges the acceptance to the host.
D5 NON Replies to the host that the reader has not completed RF interface communications.
D4 EXT Displays the status of the EXT signal of reader I/O
D3 NGL Turned on when the reader failed in RF
interface communications.
D2 OKL Turned on when the reader succeeded in RF
interface communications
Notifies the host of the
communication status of RF interface.
D1 T/R Turned on when the reader is emitting radio
waves.
D0 RUN Turned on when the reader is in normal
operation.
Notifies the host of the operation
status of RF interface.