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12.4.4.2.2
Decrement failure 'F'
This indicates a general failure during the decrement procedure or an inability to read
after the write process.
12.4.4.2.3
No tag error 'N'
The reader does not detect a response from the tag. There is either no tag present or
the tag does not respond to the request.
12.4.4.2.4
Operation mode failure 'O'
The tag is not ISO14443 type A compliant.
12.4.4.3
Copy value block (backup)
Copies a value block to another block of the same sector. A read is done
automatically after the write to ensure data integrity. Used for backup and error
recovery. A previous login 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: copy failure
'N'
Error: No tag in field
'O'
Error: Operation mode failure
Example
Command
Description
=0405
Copy value block 4 to block 5
=0506
Copy value block 5 to block 6