Rockwell Automation 56RF RFID System User Manual - Manual (Page 61)

Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011 61
RSLogix 5000 Controller Tags Chapter 7
Table 17 - Allowable Commands
• ContReadMode – The channel ContReadMode bit will indicate the
status of Continuous Read Mode for an RFID channel. A value of 0
indicates that the RFID channel is not in continuous read mode; a value of
1 indicates that the RFID channel is in continuous read mode. While in
Continuous Read Mode, the interface will ignore all other commands
except a Stop Continuous Read.
• Counter – The channel counter word is a 2-byte value that will increment
its value by 1 after the interface has completed execution of a command.
This value will roll over to 0 after it counts to 65535 and start again; at
power up this value must be 0.
• Data – Depending on the Data Format, the channel Data word is an array
of either 2-byte values or an array of 1-byte values that total 160 bytes in
length. This array is used to store information returned from the RFID
interface. Upon completion a command, reply data will be deposited in
this array and the length of the reply (in 16-bit word increments) will be
placed within the associated length field; at power up this value must be 0.
• Fault – The channel fault bit will indicate the fault status of the RFID
channel. A value of 0 indicates the channel is operating normally, a value of
1 indicates the channel has faulted.
• Length – The channel length word is a 2-byte value that will indicate the
data length for specific commands. Upon completion of a command, this
word will be populated with the number of 16-bit words returned to the
data field; at power up this value must be 0.
Value Command Description
1 Read Single Block Reads a single block of user data.
2 Read Multiple Blocks Reads multiple blocks of user data from a tag.
3 Multi-tag Block Read Reads information from up to four tags.
4 Read Byte Reads bytes of user data from a tag.
5 Start Continuous Read Initiates continuous read mode.
6 Stop Continuous Read Stops continuous read mode.
8 Teach Continuous Read Provides the ability to automatically set the best time to start
reading in continuous read mode.
10 Write SingleBlock Writes a single block of user data.
11 Write Multiple Blocks Writes multiple blocks of user data to a FRAM tag.
12 Multi-tag Block Write Writes multiple blocks of user data to up to four tags.
13 Clear Multiple Bytes Clears multiple bytes of user data in a tag.
14 Write Byte Writes bytes of data to a tag.
20 Inventory Counts the number of blocks in the field (up to four) and returns
the UUID of the first tag in the field.
31 Read Transceiver Settings Read Baud Rate, Device ID,Retry Time, and Gain.
33 Get Version Information Retrieves the firmware version from the transceiver.
34 Get System Information Gets Info Flags,UUID, DSFID, AFI,Memory Size, and IC Reference
from Tag.
40 Lock Block Locks blocks of memory.
41 Write AFI Write the AFI byte to the tag.
42 Lock AFI Locks the AFI byte from future changes.
43 Write DSFID Writes the DSFID byte to the tag.
44 Lock DSFID Locks the DSFID byte from future changes.
45 Get Multiple Block Security Status Retrieves that security status of multiple blocks within a tag.