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GWY-01-DNT-01 MANUAL – REV. 02 CHAPTER 4:

COMMAND MAPPING

PAGE 36 OF 67

COMMAND ID COMMAND NAME DESCRIPTION

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 4-3: CBX Commands Table

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 ELEMENET 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

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 66 67

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