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TechnoTrade VRD-485 Technical Manual page 11

Rfid reader with rs-485 interface

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Revision number: 1.01
Command 06 'Write Single Register'
This command is recommended for setting the reader address and baud rate.
Request:
Request code
Register number
Value (for example address
(High) and baud rate (Low))
Response:
Response code
Register number
Value (for example address
(High) and baud rate (Low))
Example:
REQUEST
Request code
Register High number
Register Low number
Reader address 27
Baud rate 9600
In this example address of the reader is set to 27 and its baud rate is set to 9600.
Note! If the baud rate value is not within the range 1 ... 6 – then the least possible baud rate is set (2400).
Response in case of the request error:
Response code
1 byte
Error code
1 byte
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VRD-485 RFID READER WITH RS-485 INTERFACE
1 byte
2 bytes
2 bytes
1 byte
2 bytes
2 bytes
0x06
0x00
0x00
0x1B
0x02
0x86
0x02 – start register number is more than 0x000B
0x06
0x0000 ... 0x000B
0xXXXX
0x06
0x0000 ... 0x000B
0xXXXX
RESPONSE
Response code
Register High number
Register Low number
Reader address 27
Baud rate 9600
Review date: 1 December, 2021
0x06
0x00
0x00
0x1B
0x02
page 11 from 13

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