User Manual
Table Of Contents
- LRP76 Long Range Passive Reader/Writer
- Table of Contents
- Getting Started
- Mechanical Specifications
- Power and Electrical Interface
- Configuration Menu
- Standard RFID Interface
- 5.1 Introduction
- 5.2 Command Timeout Values
- 5.3 Address Blocks
- 5.4 ABx Error Codes
- 5.5 Command Descriptions
- 5.6 ABx Standard Commands
- 5.6.1 Command 4 (04 Hex): Tag Fill
- 5.6.2 Command 5 (05 Hex): Block Read
- 5.6.3 Command 6 (06 Hex): Block Write
- 5.6.4 Command 7 (07H): Read Tag Serial Number
- 5.6.5 Command 8 (08 Hex): Tag Search
- 5.6.6 Command D (0D Hex): Start/Stop Continuous Block Read
- 5.6.7 Command E (0EH) Read SN and Data
- 5.6.8 Command F (0FH) Start/Stop Continuous Read SN and Data
- 5.7 ABx Fast Commands
- 5.7.1 ABx Command Packet Structure
- 5.7.2 Command 4 (04 Hex): Tag Fill
- 5.7.3 Command 5 (05 Hex): Block Read
- 5.7.4 Command 6 (06 Hex): Block Write
- 5.7.5 Command 7 (07H): Read Tag Serial Number
- 5.7.6 Command 8 (08 Hex): Tag Search
- 5.7.7 Command D (0D Hex): Start/Stop Continuous Block Read
- 5.7.8 Command E (0EH) Read SN and Data
- 5.7.9 Command F (0FH) Start/Stop Continuous Read SN and Data
- Technical Specifications
- Models and Accessories
- ASCII Chart
Standard RFID Interface
28 LRP76 Long Range Passive Reader/Writer
5.6.6 Command D (0D Hex): Start/Stop Continuous
Block Read
DESCRIPTION
When in Continuous Block Read mode, the LRP76 sends block read
commands continuously to any tag in range of the antenna. The value
in the length field controls the command (start/stop).
DISCUSSION
When a tag enters the field of the antenna, the LRP76 reads the
specified data and passes it to the host. The LRP76 continues to read
the tag, but will not send the same data to the host until the tag has
been out of the antenna’s range for a specified time period. This
period is called the Delay Between Identical Reads. It prevents
redundant data transmission when the LRP76 is in Continuous Block
Read mode. The Delay Between Identical Reads can have an integral
value in seconds between 0 and 60. A value of 0 makes the LRP76
continuously read any tag in the RF field and send the data to the
host.
The LRP76 remains in Continuous Block Read mode until it receives
a new continuous read command with a zero read length. To stop
Continuous Block Read Mode, issue the Start/Stop Continuous Read
command with a read length of zero (0).
If the LRP76 receives any other command from the host while
performing continuous read, an error (0DH) will be sent to the host.
NOTE:Other commands will NOT be performed when the LRP76 is
performing continuous read.
Field Description
Header AAH
Command Command number in hex
Start Address The tag address where the read will start
Read Length The number of tag addresses to be read. A 0 length
stops continuous mode.
Delay Between
Identical Reads
Time period that the tag must be out of reading
range before the LRP76 will send the same data to
the host.
Message
Te r mi n at o r
FFFFH