User's Manual

HF Mifare Easy Module V1.0
ACG Identification Technologies GmbH 35
7.4.3.2.3 No tag error 'N'
The reader does not detect a response of the tag. There is either no tag present or
the tag does not respond the request.
7.4.3.2.4 Unable to read after write 'X'
The tag was removed from field immediately after decrement instruction.
Data was decremented but the tag did not respond to the read after decrement
instruction, which is done automatically by the reader module.
7.4.3.3 Copy value block (backup)
Copies a value block to another block of the same sector. A read after write is done
automatically to ensure data integrity. Used for backup and error recovery. A
previous log in is needed to access a block.
Command
Command Data
'=' Source block (1 byte)
Target block (1 byte)
Answer
Answer Description
Data New value of target block (4 bytes).
'I' Error: value block failure
'F' Error: increment failure
'N' Error: No tag in field
'X' Error: Unable to read after write
Example
Command Description
=0405 copy value block 4 to block 5
=0506 copy value block 5 to block 6