HID Global Corporation 5553 Manuale Utente

1508-USM-00-0-04

HF Multi ISO RFID Reader User Manual, Firmware V1.4

2.3.2 ISO 14443 Type A (MIFARE

) only commands

2.3.2.1

Increment value block (credit)

Increments a value block with a defined value. A read is done automatically after a 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

Data

'+'

Block # (1 byte); Value (4 bytes)

Answer

Description

Data

Value (4 bytes)

'I'

Error: value block failure

'F'

Error: increment failure or inability to read after write

'N'

Error: No tag in field [addressed tag not present or not responding]

'O'

Error: Operation mode failure [tag is not ISO14443 type A compliant]

Example

Command

Description

+0400000001

Adds 1 to value block 4

+0500000100

Adds 256 to value block 5

2.3.2.1.1

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.

Page 70 of 144

August 2010