ACG HF Multi ISO RFID Reader - RFID Webshop
ACG HF Multi ISO RFID Reader - RFID Webshop
ACG HF Multi ISO RFID Reader - RFID Webshop
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<strong>ACG</strong> <strong>HF</strong> <strong>Multi</strong> <strong>ISO</strong> <strong>RFID</strong> <strong>Reader</strong> V1.0<br />
12.4.4.5 Read value block<br />
Reads a value block. The command checks if data is in value block format. The read<br />
value block command needs a successful login.<br />
Command<br />
Command<br />
'rv'<br />
Data<br />
Value block (1 byte)<br />
Answer<br />
Answer<br />
Data<br />
'F'<br />
'I'<br />
'N'<br />
'O'<br />
Description<br />
Read value (4 bytes)<br />
Error: General failure<br />
Error: value block failure<br />
Error: No tag in field<br />
Error: Operation mode failure<br />
Example<br />
Command<br />
Description<br />
rv04 Reads value of block 4.<br />
12.4.4.5.1 No value block 'I'<br />
The value read back after the write value command is not a value block. Data was<br />
written corruptly.<br />
12.4.4.5.2 No tag error 'N'<br />
This means that the tag does not respond, because either there is no tag present or<br />
none of the tags in the field are authenticated ('l' instruction).<br />
12.4.4.5.3 General failure 'F'<br />
In addition to the case of a data read failure caused by bad transmission conditions,<br />
this error is returned if a sector is addressed which is not located in the authenticated<br />
area.<br />
12.4.4.5.4 Operation mode failure 'O'<br />
The tag is not <strong>ISO</strong>14443 type A compliant.<br />
<strong>ACG</strong> Identification Technologies GmbH 99
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