EMS LRP2000 Series, Руководство оператора

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RFID Interface
60
LRP820S-Series Long-Range Passive Reader/Writers
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ABxS Command 14H: Get Block Status
DESCRIPTION
Returns the lock status of the specified blocks of data.
DISCUSSION
This command can be used to determine whether blocks of tag
memory are locked; marked "read-only." The number of specified
contiguous blocks are addressed from the specified first block. The
response from the controller gives the status of each block through a
one-word value. The value is 0000H if the block is unlocked, 0001H if
locked. The size and organization of the blocks in a particular tag can
be found through the use of command 15H, Get Label Information.
Field Content
Header AAH
Command 14H
First Block Two-Byte value for the first block
whose lock status will be
interrogated
Number of blocks Two-Byte value for the number of
blocks whose lock status will be
interrogated.
Timeout Timeout value given in 1 ms units
(001EH - FFFEH)
Message Terminator FFFFH
Response from controller:
Field Content
Header AAH
Command Echo 14H
Block Status One word represents the status
of each block 0000H indicates
that the block is not locked
0001H indicates that the block is
locked
Terminator FFFFH