characters following the "B". If other than four characters 0 - F are received for data,
no buffers will be reset. The four data characters correspond to Reader numbers in the
same way as the Assign Command, representing a bit map of the 16 Readers with the
most significant bit of the first character corresponding to Reader F and the least
significant bit of the last data character corresponding to Reader 0. A "1" bit directs the
Interface to re-allow reporting of a duplicate Tag at the corresponding Reader. A "0"
bit has no effect on the corresponding Reader.
The command [BFFFF] resets all 16 Reader buffers. Since the command [B0000]
would have no effect, it has been given the function of clearing the Mode 2 Tag transfer
buffer. As discussed under the [T] Transfer Tag command, as each Tag is transmitted it
is retained in the Interface's memory in case a transmission error is detected by the host
and it requests a retransmission of the same data. The [B0000] command clears this
retained data and may be used to acknowledge the successful reception of data by the
host.
REPEAT MESSAGE COMMAND - [R]
Type this: [R]
The Interface repeats the previous transmitted message. This command may be used if
parity errors, framing errors, etc. are detected by the host.
The Repeat message should be issued as soon as possible to avoid "losing" the last Tag
transmitted in Mode 1. If the Tag buffer is refilled by a new Tag before the Repeat
command is processed, an "e" - Empty Buffer message will be transmitted.
SET ACCESS KEY COMMAND - [K####]
Type this: [K####]
The Set Access Key command causes the Interface to recognize only Tags that have
been programmed with the same 4-digit access key, and this can only be done
transparently using an RFID, Inc. Programmer. The access key is an integral part of the
Interface's user-transparent, error detection field so that a Tag programmed with
anything other than the set access key will not be recognized at all. The four
hexadecimal digits allow 65,536 different series of Tags to exist that cannot be read
from one system to another. This feature is used mainly for security and access control
applications. Default access key is FFFF.
The data field must consist of 4 hex digits, 0 - F. If the alphanumeric digits A, B, C, D,
E, or F are used they must be upper case. If other than 4 valid hexadecimal data
characters are received by the Interface, an Invalid Command message will be issued
and the current Access Key value will be left unchanged.
SYSTEM RESET COMMAND - [S]
Type this: [S]
The System Reset command causes the Interface to perform a software reset clearing
To Next Page
Loading...