User Manual Part 1

RFID Interface

LRP2000 Long Range Passice Reader/Writer

The multi-tag commands in the ABx protocols include a parameter

which is not used with ISO15693-compliant tags. The Byte allocated

for this obsolete parameter has been left in the multi-tag command

packets. It is referred to as the "Anticollision Index" in documentation

for EMS products with firmware support for LRP-L series tags. This

series of tags does not comply with the ISO-15693 standard. The

Anticollision Index is ignored by the controller and may be set to any

value, but to maintain consistency in the case that this byte is used in

the future, it is recommended to set this Byte to 00H.

Start Continuous Read

This parameter, included only on command 83H, is a one-Byte

parameter which starts the Continuous Read if set to 01H, and stops

the Continuous Read if set to 00H. Both of the other Continuous Read

commands-- 0DH and 8DH rely on the Number of Bytes to be read to

start and stop the command. If the Number of Bytes is set to any valid

nonzero value, the Continuous read starts. If it is set to zero, the

Continuous Read stops. The use of this additional parameter on

command 83H allows for the Number of Bytes to be set to zero upon

initiation of the command, thereby interrogating the tags only for their

serial numbers.

6.3 Standard Abx Protocol

6.3 ABx Standard Protocol

The ABx standard is a binary protocol, word (2-byte) oriented, so

thesyntax table reports the Most Significant Byte (MSB) and the

LeastSignificant Byte (LSB). In the serial transmission, the MSB

istransmitted first.

Field

Number

of Bytes

Content

Header 1 AAH

Command 1 Command Code

Start

Address

2 one word gives the first Byte of tag memory

to be accessed

Number of

Bytes

2 One word gives the number of contiguous

bytes to be accessed. Not used on 07H,

08H, 14H, 15H, 16H