User's Manual

Table Of Contents
ABxS Command 89 (89H): EAS Set/Reset All
DESCRIPTION
Sets or resets the EAS feature in tag memory for all tags in range, and of the
specified Family, when the command is issued.
DESCRIPTION
The commands contains a 1 byte parameter that enables or disables the EAS
feature in tags that receive the command. When the EAS Set/Reset All com
-
mand is issued, the LRP830 responds with the number of tags affected
(Ntag). If the LRP830 returns a 0 for Ntag it means that no tags were set or
reset by the command.
When multiple tag-in-field is enabled (Anticollision Index is not 0), the
LRP830 will return a response when the timeout period expires. When mul
-
tiple tag-in-field is disabled, the LRP830 will return a response when it reads
a tag or the timeout expires.
Field Remarks
Command Command number in hex preceded by AAH
Family ID Tag Family ID - 00H = all tags
Anticollision Index Number of tags expected
Timeout 2-byte timeout value in 1 ms increments (1EH - FFFEH)
Set/Reset 1 = Set, 0 = Reset EAS
Message Terminator FFFFH
EXAMPLE
This example assumes that the tags-in-field are not enabled for the EAS
feature. It will enabled the EAS feature for tags with Family ID 09H. The
Anticollision Index is 2, so 4-8 tags are expected in the field. When the com
-
mand is issued, 5 tags with Family ID 09H are found and enabled for EAS.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
75
Command from Host
MSB LSB Remarks
AAH 89H Perform Command 89
09H 02H Family ID/Anticollision Index 2
07H D0H Timeout
00H 01H Set EAS
FFH FFH Message Terminator
Response from LRP830
MSB LSB Remarks
AAH 89H Command Echo
05H 08H Ntags/Status
FFH FFH Message Terminator