Rockwell-automation 56RF RFID System User Manual User Manual download pdf (Page 106)

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

Chapter 9 RSLogix 5000 Code Examples

Write Single Block

The Write Single Block command writes a single block of user data to an

RFIDtag.

Set the following values in the output image table:

a. xx:O.Channel[0].Command = 10

b. xx:O.Channel[0].Address = starting address to write

c. xx:O.Channel[0].BlockSize = 0, 4, or 8

d. xx:O.Channel[0].Data[0…112] = data to write

e. xx:O.Channel[0].Length = 0, 4, or 8

f. xx:O.Channel[0].BlockSize = 0, 4, or 8

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

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

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

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

If UIDLow and UIDHi are set to 0, this command will operate on the first tag in

the field. Specify a UUID in xx:O.Channel[0].UIDLow and

xx:O.Channel[0].UIDHi to perform the command on a specific tag.

The Length and Block Size fields are used to specify the number of bytes/block

of the tag. Valid values are:

• 0 = 4 bytes/block

• 4 = 4 bytes/block

• 8 = 8 bytes/block

Typically, ISO15693 tags have a block size of 4 bytes/block, and FRAM tags have

a block size of 8 bytes/block.

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Rockwell-automation 56RF RFID System User Manual User Manual Page 106