User's Manual
Table Of Contents
- Modbus/TCP Communications
- 7-1 Outline
- 7-2 Message Formats
- 7-3 RF Communications Command Options
- 7-4 Communications Procedure
- 7-5 Commands
- 7-6 V780 Command Details
- 7-6-1 Single-access Communications Commands
- 7-6-2 Multiaccess Communications Commands
- 7-6-3 Modbus Expansion Communications Commands
- 7-6-4 Reader/Writer Control Commands
- 7-6-5 Reader/Writer Setting Commands: Network Settings
- 7-6-6 Reader/Writer Setting Commands: Communications Settings
- 7-6-7 Reader/Writer Setting Commands: Device Settings
- 7-6-8 Maintenance Commands: Device Information
- 7-6-9 Maintenance Commands: Log Information
- 7-6-10 Maintenance Commands: RF Communications Information
7 - 21
7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6 V780 Command Details
7
7-6-1 Single-access Communications Commands
• Error Response
Execution Examples
Reading the ID Data from the RF Tagt
Example 1: Execution When an RF Tag Is in the Communications Field (StoredPC: 3000 hex, EPC
code: 111122223333444455556666 hex)
TX: 000000000006FF0340000020
RX: 000000000043FF0340300011112222333344445555666600…00
* Words 7 through 31 of the EPC code section (i.e., the words past the EPC length of 6 words) are
filled with zeros.
Example 2: Execution When an RF Tag Is Not in the Communications Field (Exception Code: 04
Hex (Failure in Device))
TX: 000000000006FF0340000020
RX: 000000000003FF8304
Byte-0 Byte-1 Byte-2 Byte-3 Byte-4 Byte-5 Byte-6 Byte-7 Byte-8
Transaction identi-
fier
Protocol identifier Field length Unit
identifier
Function
code
Excep-
tion
code
X X 0000 hex 0003 hex FF hex 83 hex 1 byte
Parameter Description
Exception code For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.