Rockwell-automation 56RF RFID System User Manual User Manual download pdf (Page 90)

90 Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011

Chapter 9 RSLogix 5000 Code Examples

Example Results

The input image data fields are populated with the number of tags, followed by

the UUID and block data of each tag.

In the example below, four Cat. No. 56RF-TG-30 RFID tags were read. These

tags hold 4bytes per block. Since two blocks (25 and 26) were read, a total of

eight data fields are used to store the user data. The figure only shows the

information from two of the four RFID tags.

Read Multiple Blocks

The Read Multiple Blocks command reads multiple blocks of user data from an

RFID tag. Option Flags can be set to return just the data in the blocks or return

the data and the security status for each block of data. The maximum number of

blocks that can be read at one time is 10.

•Option Flag 0 – Returns multiple blocks of user data. Set

xx:O.Channel[0].Data[0] = 0.

•Option Flag 1 – Returns multiple blocks of user data and the security

status of each block. Set xx:O.Channel[0].Data[0] = 1.

Set the following values in the output image table:

a. xx:O.Channel[0].Command = 2

b. xx:O.Channel[0].Address = the first block to read

c. xx:O.Channel[0].BlockSize = 0

d. xx:O.Channel[0].Data[0] = the Option Flag

e. xx:O.Channel[0].Length = the number of blocks to read

f. xx:O.Channel[0].Reset = 0

g. xx:O.Channel[0].Timeout = 0

h. xx:O.Channel[0].UIDLow = 0 (or UIDLow)

i. xx:O.Channel[0].UIDHi = 0 (or UIDHi)

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Rockwell-automation 56RF RFID System User Manual User Manual Page 90