RFID Communications
65 LRP2000 Passive Reader/Writer
In Continuous Read mode, the LEDs indicate the following:
The command and response from the controller are formatted as follows.
This example places the controller in Continuous Read mode and reads eight bytes of data from the tag
starting at address 0001H. A delay between identical reads of 2 seconds (0002H =2 x 1 second
increments) is set.
The controller first returns an acknowledgment of the command followed by a response containing read
data when a tag enters the antenna field.
LED Behavior Description
ANT ON Assumes the antenna is powered and functioning
CONFIG BLINK Tag entered the RF field
RF ON Tag has been read and is still in the field
RF OFF Read tag has been out of range for the specified time
Command Response
Field Remarks MSB LSB Remarks
Command Command number in hex preceded by AAH AAH 0DH Command Echo
Start Address 2 byte value for the start address in the tag FFH FFH Message Terminator
Read Length 2 byte value for the read length
Delay Between
Identical Decodes Time the tag must be out of the antenna range before
the controller will transmit data again from that tag.
Value is expressed in 1 second units
Message Terminator FFFFH
Command from Host Response from controller
MSB LSB Remarks MSB LSB Remarks
AAH 0DH Perform Command D AAH 0DH Command Echo
00H 01H Start address 00H 52H Read data byte 1
00H 08H Read 8 bytes 00H 46H Read data byte 2
00H 02H 2-second Timeout 00H 49H Read data byte 3
FFH FFH Message Terminator 00H 44H Read data byte 4
00H 41H Read data byte 5
00H 20H Read data byte 6
00H 54H Read data byte 7
00H 61H Read data byte 8
FFH FFH Message Terminator