Summary of Contents for TechnoTrade VRD-485
- Page 1 VRD-485 RFID reader with RS-485 interface TECHNICAL GUIDE Review date: 1 December, 2021...
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Page 2: Table Of Contents
VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 CONTENT REVISION HISTORY ..............................3 PURPOSE OF THE DOCUMENT ..........................4 APPOINTMENT ..............................5 TECHNICAL SPECIFICATIONS ..........................5 CONNECTION ................................ 6 OPERATION ................................7 COMMUNICATION PROTOCOL ..........................8 VARIANTS OF SUPPLY AND ORDER INFORMATION .................... -
Page 3: Revision History
VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 REVISION HISTORY DATE SECTION DESCRIPTION 1.01 2013.01.11 Evgeniy First release Vasyliev www.technotrade.ua page 3 from 13... -
Page 4: Purpose Of The Document
Due to a reason that VRD-485 RFID reader with RS-485 interface is constantly being developed in direction of improvements of their possibilities, changes are possible in its final version, which is not described in given Technical Guide. -
Page 5: Appointment
Review date: 1 December, 2021 APPOINTMENT VRD-485 RFID reader with RS-485 interface is intended for reading RFID contactless identifiers (cards, tags, others) and sending it over RS-485 interface. VRD-485 reader provides reading of the identifier from distance from 10 to 90 mm (depending on the conditions). At voltage +12 V standard distance for reading EM-Marine identifier at bringing the RFID tag in parallel to case of the reader is 70…90 mm. -
Page 6: Connection
VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 CONNECTION Reader is equipped with 4-wire colored cable for connection. Pinout of the cable: WIRE COLOR DESCRIPTION +12 V DC power supply Black Ground of power supply... -
Page 7: Operation
Review date: 1 December, 2021 OPERATION Configuration software Program VRD-485.exe is intended for checking the operation of the reader, setting its parameters and visualizing the packet exchange (implementation of the Modbus protocol), it runs under Windows OS. Reset of configuration to default values In order to perform reset of the reader’s configuration (set default configuration to the reader) it is... -
Page 8: Communication Protocol
VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 COMMUNICATION PROTOCOL Data transmission is performed through the RS-485 interface in asynchronous mode at a baud rates from 2400 to 115200 bit/s. Port setting are: 1 start bit, 8 data bits, parity can be configured, 1 stop bit. - Page 9 VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 Modbus registers ADDRESS BYTE DEFAULT VALUE ALLOWED VALUES DESCRIPTION High 0x01 0x00 … 0xFF Reader address 0x03 8/9 bits: - 0x0X: 8 bits, none parity - 0x1X: 8 bits, even parity...
- Page 10 VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 Command 03 ‘Read Holding Registers’ This command is used for reading registers in range 0x0000 … 0x000B. Request: Request code 1 byte 0x03 Start register 2 bytes 0x0000 …...
- Page 11 VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 Command 06 ‘Write Single Register’ This command is recommended for setting the reader address and baud rate. Request: Request code 1 byte 0x06 Register number 2 bytes 0x0000 …...
- Page 12 VRD-485 RFID READER WITH RS-485 INTERFACE Revision number: 1.01 Review date: 1 December, 2021 Command 10 ‘Write Multiple Registers’ This command is recommended for setting the indication and zeroing the RFID identifier value. Request: Request code 1 byte 0x10 Register start number 2 bytes 0x0000 …...
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Page 13: Variants Of Supply And Order Information
Review date: 1 December, 2021 VARIANTS OF SUPPLY AND ORDER INFORMATION Variant of VRD-485 RFID reader supply is marked with VRD485-y-z, where - y – type of reader: o “INT” in case if VRD reader is supplied for internal usage o “EXT”...