User Manual
Table Of Contents
- LRP75 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
- LRP75 Beta Connections
- Models and Accessories
- ASCII Chart
Standard RFID Interface
LRP75 Long Range Passive Reader/Writer 45
EXAMPLE
Checks for an RFID tag in the RF field. A timeout of 2 seconds
(07D0H = 2000 x 1 msec increments) is set for the completion of the
Tag Search.
5.7.7 Command D (0D Hex): Start/Stop Continuous
Block Read
DESCRIPTION
When in Continuous Block Read mode, the LRP75 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 LRP75 reads the
specified data and passes it to the host. The LRP75 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 LRP75 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 LRP75
continuously read any tag in the RF field and send the data to the
host.
Command from the Host Response from the LRP75
Field Contents Field Contents
Header 02H Header 02H
02H 02H
Command Size 00H Response Size 00H
03H 01H
Command Code 08H Command Echo 08H
Timeout, 2 seconds 07H Terminator <ETX> 03H
D0H
Terminator <ETX> 03H