User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 94
12.4.4.1.3 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.
12.4.4.1.4 Operation mode failure 'O'
The tag is not ISO14443 type A compliant.
12.4.4.2 Decrement value block (debit)
Decrements a value block with a defined value. A read is done automatically after the
write to verify data integrity. The command fails if the source block is not in value
block format. A previous login is needed to access a block.
Command
Command Data
'-' Block (1 byte)
Value (4 bytes)
Answer
Answer Description
Data Value (4 bytes)
'I' Error: value block failure
'F' Error: decrement failure
'N' Error: No tag in field
'O' Error: Operation mode failure
Example
Command Description
-0400000001 Subtract 1 to value block 4
-0500000100 Subtract 256 to value block 5
12.4.4.2.1 No value block 'I'
Specified block does not match the value format. The value block is corrupted. A
backup block can be used to restore the correct value.