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11
Manual Structure
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Manual Structure
The following page structure is used in this manual.
Note This illustration is provided only as a sample. It may not literally appear in this manual.
Page Structure
7 - 9
7
Level 1 heading
Level 2 heading
Level 3 heading
Level 2 heading
A step in a procedure
Manual name
Special information
Level 3 heading
Page tab
Give the current
headings.
Indicates a procedure.
Icons indicate
precautions, additional
information, or
reference information.
Gives the number of the
main section.
7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-4 Communica
tions Procedure
7-4-1
Command C
o
mmunications Procedure
7-4
Communications Procedure
In the computer, PLC, or other host devices, write the program to communicate with the Reader/Writer
using TCP sockets.
If you use an Modbus/TCP master device, follow the communications procedure for the device you are using.
A connection is required between the host device and Reader/Writer to communicate with the
Reader/Writer. After you establish a connection, send commands and receive the responses.
1
Connection Processing: Opening a Socket
Send a request for a connection from the host device to the Rea der/Writer and establish a TCP
connection. Monitor for connection timeouts as required.
2
Command Send Processing: Sending Socket Data
Send the command from the host device to the Reader/Writer in a message.
Monitor for send timeouts as required.
3
Response Reception Processing: Receiving Socket Data
At the host device, wait to receive the message from the host device and receive the response.
Monitor for reception timeouts as required.
4
Disconnection Processing: Closing the Socket
Send a request for a disconnection from the host device to the Reader/Writer and disconnect
the TCP connection. Monitor for disconnection timeouts as required.
Precautions for Correct Use
Access to a Reader/Writer is possible from only one host device at a time.
If a host device B connects to a Reader/Writer while another host device A is already con-
nected to it, the connection between host device A and the Reader/Writer will be automatically
disconnected and a connection with host device B will be established.
7-4-1
Command Commun
ications Procedure
Host device
(client)
Reader/Writer
(server)
Connection requested.
Connection request acknowledged.
Disconnection requested.
Disconnection request acknowledged.
Command sent.
Response returned.
Command
execution
Summary of Contents for V780 Series
Page 22: ...Version Upgrade Information 20 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 60: ...3 Part Names and Functions 3 14 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 152: ...6 Functions 6 76 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 334: ...8 Browser Interface 8 44 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 358: ...9 Troubleshooting 9 24 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 392: ...Appendices A 30 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 393: ...I 1 I UHF RFID System V780 series Reader Writer User s Manual Z389 Index ...
Page 397: ......