User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 85
12.4.3.18 Read block
This command reads a data block on a card. The size of the returned data depends
on the tag used. The block address range depends on the tag as well.
Command
Command Data
'r' Block address (1 byte), valid range 00h – 40h
'rb' Block address (1 byte)
Answer
Answer Description
Data data block (depends on tag type)
'F' Error: read failure
'N' Error: No tag in field
'O' Error: Operation mode failure
'R' Error: Out of range
Example
Command Description
rb05 Reads block 05.
12.4.3.18.1 Read failure 'F'
This error is returned if either the reader receives bad data or the block address
exceeds the block address range of the sector.
12.4.3.18.2 No tag in field 'N'
The tag does not respond. There is either no tag present or addressed.
12.4.3.18.3 Operation mode failure 'O'
The presented tag is not ISO14443 type A, SR 176, ICode, ICode-UID and ISO
15693 compliant.
For ISO 14443 type A only mifare
®
tags are supported.