HID Global Corporation 5553 Manuale Utente

1508-USM-00-0-04

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

2.1.2 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

Variable length

1 byte

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

Variable length

1 byte

2.1.2.1

STX

Start of transmission (02h)

2.1.2.2

Station ID

Unique ID of the station

00h:

Reserved for the bus master. Readers send response to this device ID.

FFh:

Broadcast message. All devices will execute the command and send their response.

2.1.2.3

Length

Length defines the length of the data block, including the flag byte, if binary protocol version 2 is
activated. If length is set to zero, 256 data bytes are transmitted. The reader module only can send
256 data bytes, but cannot receive commands with 256 bytes.

2.1.2.4

Flags

The flag byte gives additional information to the host.

Bit 3 – Bit 7

Bit 1 – Bit 2

Bit 0

RFU

Leading Character Info

Error State

Error State

If cleared, the command was processed successfully. If set, an error occurred.

Leading Character Info

Bit 1 & 2 defines how to interpret the data in the binary frame.

Bit 2

Bit 1

Description

No leading character available, all values are hexadecimal.

The data contains one leading character.

All data bytes are characters.

1 1 RFU

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August 2010