User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 43
12 Software
By default, data is transmitted at 9600, n, 8, 1, no handshaking. Two protocol modes
are supported. The protocol mode is configured in the reader EEPROM. As factory
default, the ASCII protocol is used.
12.1 ASCII Protocol
This protocol is designed for easy handling. The commands are issued using a
terminal program. Data is transmitted as ASCII hexadecimal that can be displayed on
any terminal program (i.e. HyperTerminal).
Command Data
Variable length Variable length
Figure 12-1: ASCII protocol frame
12.2 Binary Protocol
This protocol is designed for industrial applications with synchronization and frame
checking. An addressing byte for party line (master/slave, multi-drop) is also
included.
The protocol usually requires a device driver. Data is transmitted in binary mode. The
reader uses an internal binary watchdog timer to ensure correct framing.
STX Station ID
Length Data BCC ETX
1 byte 1 byte 1 byte Variable length 1 byte 1 byte
Figure 12-2: Binary Frame Version 1
The binary frame version 2 is only sent to the host. It is implemented to give
extended information to the host.
Version 2 must be enabled in the Protocol configuration 2 register.
STX Station ID Length
Flags Data BCC ETX
1 byte 1 byte 1 byte 1 byte Variable length 1 byte 1 byte
Figure 12-3: Binary Frame Version 2