Rockwell Automation 56RF RFID System User Manual - Manual (Page 119)

Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011 119
Chapter
12
RFID Tag Speed
The tables below are to be used as a guide to help determine the amount of
information that can be written to/read from an RFID tag based on the speed of
your application. For example, in order to consistently read 8 bytes from a tag
using the square transceiver, your line speed should be 0.827 m/s or slower.
If you have a high speed application, it is best to choose the largest transceiver,
larger tag, which will provide the largest antenna range. This will provide the
longest time the tag is in the field for read/write functions. This will also help
with tag misalignment issues.
If your tag will be stopped when all read/write functions occur, and tag
misalignment is not an issue, smaller transceivers can be used. It is recommended
that the tag be stopped if large amounts of data will be written to/read from the
tag.
Table 18 - Rectangular (80x90) Transceiver
Table 19 - Square (40x40) Transceiver
Max Tag Speed (m/s)
Bytes Read Write
4 1.488095 1.328609
8 1.378676 1.121915
16 1.202887 0.8566533
32 0.9578544 0.5811701
64 0.6802721 0.3535235
112 0.4743833 0.2227833
160 0.3641661 0.1626369
2000 0.03674939 0.01432665
Max Tag Speed (m/s)
Bytes Read Write
4 0.8928571 0.7971656
8 0.8272058 0.6731489
16 0.7217322 0.513992
32 0.5747126 0.348702
64 0.4081633 0.2121141
112 0.28463 0.13367
160 0.2184996 0.09758213
2000 0.02204964 0.008595988