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 Modbus/TCP Communications
7 - 4
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Precautions for Correct Use
Communications Units and communications commands that support the Modbus/TCP protocol
support only function codes that comply with Modbus/TCP Class 0. Therefore, the function
code FC100 for expanded commands cannot be used.
You can set any IP address for the V780 Reader/Writer.
For details, refer to 7-6-5 Reader/Writer Setting Commands: Network Settings on page 7-54 or Setting
the IP Address of the Reader/Writer from a Web Browser on page 5-4.
Normally, port number 502 (01F6 hex) is used for Modbus/TCP communications.
With the V780 Reader/Writer, you can change the port number to between 1,024 and 65,535 (0400 hex
and FFFF hex).
For details, refer to ?8-2-3 ???????? (P.8-5)?.
IP Address Settings of the Reader/Writer
Port Numbers Used for Modbus/TCP Communications