COMMAND PROTOCOL
29
4
Command ID Command Name
Description
0x79
Clear Pending Response
Deletes all pending or buffered
responses in the Gateway and resets all
Instance Counters to zero
Multi-Tag RFID Commands
0x92
Multi-Tag Read ID and Data All
Retrieves the tag ID number and a
contiguous segment of data from all
RFID tags in range
0x95
Multi-Tag Block Read All
Retrieves a contiguous segment of data
from all RFID tags in range
0x96
Multi-Tag Block Write All
Writes a contiguous segment of data to
all RFID tags in range
0x97
Multi-Tag Get Inventory
Retrieves the tag ID number from all
RFID tags found in range
0x98
Multi-Tag Search All
Checks for the presence of RFID tags in
RF range and returns only the number of
tags found
0xA5
Multi-Tag Block Read by ID
Reads a contiguous segment of data
from a specific RFID tag identified by its
tag ID
0xA6
Multi-Tag Block Write by ID
Writes a contiguous segment of data to a
specific RFID tag identified by its tag ID
Table 5: CBx Commands
4.5 CBX COMMAND PROTOCOL EXAMPLES
4.5.1 CBx - Controller Command Example
In the example below,
Command 0x05 (Read Data
) is issued to the RFID controller at Node
01. The controller is instructed to read four bytes of data from a tag beginning at tag address
0x0020. The Timeout Value, measured in milliseconds, is set for two seconds for the
completion of this command (
0x07D0 = 2000 x .001 = 2 seconds
).
Word #
Packet Element
MSB
LSB
01
Overall Length of Command
(
in
"
words
") 0x00
0x06
02
0xAA
in MSB
Command ID
in LSB: (
0x05
-
Read Data)
0xAA 0x05
03
0x00
in MSB
Node ID
in LSB: (
0x01
)
0x00 0x01
04
Timeout Value
: (
2 seconds
) 0x07
0xD0
05
Start Address
: (
0x0020
) 0x00
0x20
06
Read Length
: (
4 bytes
) 0x00
0x04
Table 6: Controller Command Example
Summary of Contents for GWY-01-PBS-01
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