Omron V78068 RFID READER/WRITER User Manual sec7

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Modbus/TCP Communications
This section provides an overview of Modbus/TCP communications and describes the
communications format, communications commands, and communications procedure.
7-1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
7-1-1
7-1-2
7-1-3
Modbus/TCP Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Modbus/TCP Function Codes Supported by the V780 . . . . . . . . . . . . . . . . . . 7-2
Communications System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7-2 Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
7-2-1
7-2-2
7-2-3
7-2-4
7-2-5
7-2-6
Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Response Format for Normal Completion . . . . . . . . . . . . . . . . . . . . . . . . . . .
Response Format for Error Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Multiple Resisters Command/Response (FC03) . . . . . . . . . . . . . . . . . .
Write Multiple Resisters Command/Response (FC16) . . . . . . . . . . . . . . . . . .
Expanded Command/Response (FC100) . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-5
7-6
7-7
7-8
7-8
7-8
7-3 RF Communications Command Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
7-4 Communications Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
7-4-1
7-4-2
7-4-3
7-4-4
Command Communications Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
Error Response Reception Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12
RF Tag Communications Command Procedure for Single-access
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
RF Tag Communications Command Procedure for Multiaccess
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
7-5 Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17
7-6 V780 Command Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20
7-6-1
7-6-2
7-6-3
7-6-4
7-6-5
7-6-6
7-6-7
7-6-8
7-6-9
7-6-10
Single-access Communications Commands . . . . . . . . . . . . . . . . . . . . . . . . 7-20
Multiaccess Communications Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32
Modbus Expansion Communications Commands . . . . . . . . . . . . . . . . . . . . 7-41
Reader/Writer Control Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49
Reader/Writer Setting Commands: Network Settings . . . . . . . . . . . . . . . . . . 7-54
Reader/Writer Setting Commands: Communications Settings . . . . . . . . . . . 7-70
Reader/Writer Setting Commands: Device Settings . . . . . . . . . . . . . . . . . . . 7-98
Maintenance Commands: Device Information . . . . . . . . . . . . . . . . . . . . . . 7-102
Maintenance Commands: Log Information . . . . . . . . . . . . . . . . . . . . . . . . . .7-113
Maintenance Commands: RF Communications Information . . . . . . . . . . . 7-121
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-1
7 Modbus/TCP Communications
7-1
7-1-1
Outline
Modbus/TCP Communications
• A V780 Reader/Writer can perform Modbus/TCP-compliant message communications with the host
device (PLC).
• Communications between the host device (PLC) and the V780 Reader/Writer are performed on a client-server basis using the TCP/IP protocol. The computer, PLC, or other host device is the client and
the Reader/Writer is the server.
• The message that the host device (PLC) sends to the Reader/Writer is called a command. The message that the Reader/Writer returns is called the response.
Host device
(client)
Reader/Writer
(server)
Ethernet Cable
Command
Power Supply Cable
TCP port number: 502
Response
Additional Information
Modbus/TCP Protocol
The Modbus/TCP protocol is a communications protocol developed for PLCs by Modicon
Inc.(AEG Schneider Automation International S.A.S.). It is an open standard and has been
used for a variety of industrial devices.
A query in Modbus/TCP communications is called a command in this manual.
7-1-2
Modbus/TCP Function Codes Supported by the V780
The Modbus/TCP function codes that are supported by the V780 Reader/Writer are given in the following table.
Function code
FC03 and FC16
(normal commands)
Description
These function codes comply with Modbus/TCP Class 0.
The basic Modbus/TCP function codes are classified in Class 0.
Class 0 contains the following two functions: Read Multiple Resisters (FC03) and Write
Multiple Registers (FC16).
These are called normal commands in this manual.
This function code has a unique format that was defined by OMRON.
FC100
(expanded command)
This function code is used to reduce command/response exchanges between the host
device and Reader/Writer and give priority to the performance of communications with
the host device.
This is called an expanded command in this manual.
7-2
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-1-3
Communications System
There are two communications systems used by the V780 depending on the function codes that are
used.
Modbus/TCP Communications System (FC03 and FC16)
The communications system that uses normal commands that are compliant with Modbus/TCP Class 0
is shown below.
Refer to 7-2 Message Formats on page 7-5 for details on the normal commands.
Modbus/TCP communications instructions
Modbus/TCP Unit or other applicable Unit
Host device
Reader/Writer
(client)
(server)
FC03 or FC16
Ethernet Cable
TCP port number: 502
7-1 Outline
Command
Power Supply Cable
Response
TCP/IP Socket Communications System (FC03, FC16, and FC100)
Refer to 7-2 Message Formats on page 7-5 for details on the expanded communications commands.
Refer to 7-4 Communications Procedure on page 7-11 for information on creating a program for TCP/IP
communications.
Socket communications instructions
Ethernet Unit or other applicable Unit
Reader/Writer
(server)
Host device
(client)
FC03, FC16, or FC100
Ethernet Cable
Command
Power Supply Cable
TCP port number: 502
Response
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-3
7-1-3 Communications System
The expanded command that has a unique format defined by OMRON (FC100) cannot be sent with a
Modbus/TCP Class 0-compliant protocol. The TCP/IP socket communications of the host device (PLC)
are used instead.
7 Modbus/TCP Communications
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.
IP Address Settings of the Reader/Writer
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.
Port Numbers Used for Modbus/TCP Communications
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)?.
7-4
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-2
Message Formats
7-2-1
Byte-0
Command Format
Byte-1
Byte-2
Byte-3
Byte-4
Byte-5
Byte-6
Transaction identifier
Protocol identifier
Field length
Unit
identifier
XXXX hex
Always 0000 hex.
XXXX hex
Always
FF hex.
Byte-7
Function
code
03 hex,
10 hex,
or 64
hex
Byte-8
Byte-9
…
Byte-n
Data
XX...XX hex
X: Any value, n: 4,351 max.
Range included in the field length.
Command frame length
7-2 Message Formats
Transaction Identifier
This value is used to identify the message sent by the host device.
The transaction identifier in the response from the Reader/Writer will be a copy of the value that is
specified here.
Protocol Identifier
This field is always 0000 hex.
7-2-1 Command Format
Field Length
Specify the number of bytes inclusively from the unit identifier through the end of the data.
If the function code is FC03 or FC16, the maximum field length is 250 bytes.
If the function code is FC100, the maximum field length is 4,346 bytes.
Unit Identifier
This field is always FF hex.
Function Code
The function code indicates the command to request execution from the Reader/Writer.
Function code
FC03 (03 hex)
FC16 (10 hex)
FC100 (64 hex)
Function
Read Holding Register
Write Holding Register
Reader/Writer command
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Remarks
Modbus/TCP Class 0 compliant
This function code is used for commands
with a unique manufacturer definition that
gives priority to the performance of communications with the host device.
7-5
7 Modbus/TCP Communications
Data
Specify the data that is relevant to the function code.
The format of the data depends on the function code.
7-2-2
Byte-0
Response Format for Normal Completion
Byte-1
Byte-2
Byte-3
Byte-4
Byte-5
Byte-6
Transaction identifier
Protocol identifier
Field length
Unit
identifier
XXXX hex
Always 0000 hex.
XXXX hex
Always
FF hex.
Byte-7
Function
code
03 hex,
10 hex,
or 64
hex
Byte-8
Byte-9
…
Byte-n
Data
XX...XX hex
X: Any value, n: 9,215 max.
Range included in the field length.
Transaction Identifier
The value that was specified in the command is set.
Protocol Identifier
This field is always 0000 hex.
Field Length
The number of bytes inclusively from the unit identifier through the end of the data is set.
Unit Identifier
This field is always FF hex.
Function Code
The value of the function code that was specified in the command is set.
Data
The data that is relevant to the function code is set.
The format of the data depends on the function code.
7-6
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-2-3
Response Format for Error Completion
Byte-0
Byte-1
Byte-2
Byte-3
Byte-4
Byte-5
Transaction identifier
Protocol identifier
Field length
Byte-6
Unit identifier
XXXX hex
Always 0000 hex.
Always 0003 hex.
Always FF
hex.
Byte-7
Function
code
83 hex, 90
hex, or E4
hex
Byte-8
Exception
code
XX hex
X: Any value
Range included in the field length.
Transaction Identifier
The value that was specified in the command is set.
Protocol Identifier
This field is always 0000 hex.
7-2 Message Formats
Field Length
This field is always 0003 hex.
Unit Identifier
This field is always FF hex.
The value of the function code that was specified in the command plus 80 hex is set.
Exception Code
A code that provides information on the error is set.
You can use the error code to identify the error that was detected by the Reader/Writer. The exception
code and error code are related as given below. Refer to the most recent command error information or
command error log to check details on the error using the error code.
Exception
code
Exception code meaning
01 hex
Illegal function
02 hex
03 hex
Illegal data address
Illegal data value
04 hex
Failure in slave device
06 hex
Slave device busy
V780 error code
1001 hex
1002 hex
1003 hex
1004 hex
1005 hex
2*** hex
1018 hex
101F hex
1011 hex
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Frame length error
Frame header error
Unknown command error
Command format error
Command parameter error
RF Tag communications error
Command execution failure, minor fault
Command execution failure, major fault
Command execution failure, busy
7-7
7-2-3 Response Format for Error Completion
Function Code
7 Modbus/TCP Communications
7-2-4
Read Multiple Resisters Command/Response (FC03)
Command Format
Byte-7
Function code
Byte-8
Byte-9
Register address
03 hex
XXXX hex
Byte-10 Byte-11
Word count
0001 to 0078 hex
(1 to 120)
Normal Response Format
Byte-7
Function code
03 hex
7-2-5
Byte-8
Byte count
XX hex
Byte-9
…
Byte-n
Read holding register data
XX...XX hex
Write Multiple Resisters Command/Response (FC16)
Command Format
Byte-7
Function code
Byte-8
Byte-9
Register address
10 hex
XXXX hex
Byte-10 Byte-11
Word count
0001 to 0078 hex
(1 to 120)
Byte-12
Byte count
Byte-13
…
Byte-n
Write holding register data
Word count x 2
XX...XX hex
Normal Response Format
7-2-6
Byte-7
Function code
Byte-8
Byte-9
Register address
10 hex
XXXX hex
Byte-10 Byte-11
Word count
0001 to 0078 hex
(1 to 120)
Expanded Command/Response (FC100)
Command Format
Byte-7
Function code
64 hex
Byte-8
Byte-9
Subfunction code
XXXX hex
Byte-10
…
Byte-n
Expanded command parameters
XX...XX hex
Normal Response Format
Byte-7
Function code
64 hex
7-8
Byte-8
Byte-9
Subfunction code
XXXX hex
Byte-10
…
Byte-n
Expanded response data
XX...XX hex
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-3
RF Communications Command
Options
This section describes the options that you can use together with RF communications commands (multiaccess or Modbus expansion). You can specify options to get the EPC of the RF Tag, the reception
level, or other communications information together with the normal data for the command.
For commands with the multiaccess specification, the communications information specified with the
option is returned in the response for the command that gets the execution results, i.e., the two commands are used together.
For commands with the Modbus expansion, the communications information specified with the option is
returned as an attachment to the response.
 Options
Item
EPC
Reception
level
Relevant bit
Bit 0
Bit 1
Reserved 1
Diagnostic
result
Bits 2 to 3
Bit 4
Reserved 2
Description
The StoredPC and EPC code are attached.
The reception level (signed hexadecimal) is attached.
Information size
32 words
1 word
FFFF to FF9D hex (-1 to -99 [dBm])
• A value of 0 will be set if processing ended in an error.
• These bits are reserved.
The diagnostic results (4-digit hexadecimal) are attached.
--1 word
If communications diagnostics are disabled, 0000 hex is
attached.
Bits 5 to 15
For details, refer to Response Formats on page 7-125 under
GET COMMUNICATIONS DIAGNOSTIC INFORMATION on
page 7-125.
• These bits are reserved.
---
Option Specification Examples:
Specify 0001 hex to have the EPC attached.
Specify 0003 hex to have the EPC and reception level attached.
Specify 0011 hex to have the EPC and diagnostic results attached.
 Options Supported by RF Communications Commands
OK: Option can be specified, No: Option cannot be specified. (A parameter error will occur if it is.)
---: Reserved (Always specify 0 for these unused bits.)
Options
Classification
Communications
command, multiaccess
Command
SET MULTIACCESS ID READ
SET MULTIACCESS DATA READ
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Reserved
Bits 5 to
15
-----
Diagnostic
results
Reserved
RSSI
EPC
Bit 4
Bits 2
and 3
Bit 1
Bit 0
No
No
-----
7-3 RF Communications Command Options
Options
OK
OK
No
OK
7-9
7 Modbus/TCP Communications
Options
Classification
Communications
command, Modbus expansion
7 - 10
Reserved
Command
EXTENDED DATA READ
EXTENDED DATA WRITE
EXTENDED MULTIACCESS ID
READ
EXTENDED MULTIACCESS DATA
READ
Bits 5 to
15
---------
Diagnostic
results
Reserved
RSSI
EPC
Bit 1
Bit 0
OK
OK
No
Bits 2
and 3
-------
OK
OK
OK
OK
OK
No
No
---
OK
OK
Bit 4
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
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.
7-4-1
Command Communications Procedure
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.
Connection Processing: Opening a Socket
Send a request for a connection from the host device to the Reader/Writer and establish a TCP
connection. Monitor for connection timeouts as required.
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.
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.
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.
Connection requested.
Connection request acknowledged.
Command sent.
Command
execution
Response returned.
Disconnection requested.
Disconnection request acknowledged.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-4-1 Command Communications Procedure
Reader/Writer
(server)
Host device
(client)
7-4 Communications Procedure
7 - 11
7 Modbus/TCP Communications
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 connected 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.
7-4-2
Error Response Reception Procedure
If an error response is received, you can check the most recent command error information or command error log in the Reader/Writer to get details on the nature of the error. An error has occurred if the
function code in the response that was returned from the Reader/Writer is 80 hex higher than the function code in the query.
You can do this by sending a GET MOST RECENT ERROR INFORMATION command or GET COMMAND ERROR LOG command from the host device or by using the Web browser interface through the
Web server.
Reader/Writer
(server)
Host device
(client)
Command sent.
Command
execution
Error
occurs.
Response returned.
Function code + 80 hex
Error
detected.
GET MOST RECENT ERROR
INFORMATION command sent.
(Or, GET COMMAND ERROR LOG command sent.)
Error information returned.
7 - 12
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-4-3
RF Tag Communications Command Procedure for Single-access
Communications
When you send an RF Tag communications command with single-access communications, the
Reader/Writer communicates with only one RF Tag in the communications field.
Using a Normal Command (FC03 or FC16)
With a normal command, the maximum size of data that you can read from an RF Tag is 120 words. To
read more data than that, you must use more than one READ DATA or WRITE DATA command, or use
an expanded command.
Host device
(client)
Reader/Writer
(server)
READ DATA communications
command sent.
Communications field
Command
execution
RF Tag memory
read/written.
7-4 Communications Procedure
Command
execution
RF Tag memory
read/written.
RF Tag A
Response returned.
Read data (120 words max.)
WRITE DATA communications
command sent.
Data to write (120 words max.)
RF Tag A
Response returned.
Host device
(client)
Reader/Writer
(server)
READ DATA communications
command sent.
Communications field
Command
execution
Timeout (TMO)
Response returned.
Exception code: Failure in slave device
GET MOST RECENT ERROR INFORMATION
command sent.
Error information returned.
Error code: RF Tag missing error
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 13
7-4-3 RF Tag Communications Command Procedure for Single-access Communications
If communications with an RF Tag are not possible, a “failure in slave device” exception code (04 hex)
is returned in an error response. Following the error response reception procedure.
7 Modbus/TCP Communications
If you want to check the EPC code or reception level when communications with the RF Tag are successful, send a GET RF TAG ADDITIONAL INFORMATION command after the response to the communications command has been received. The reception level from the RF Tag that was just
communicated with will be returned.
Host device
(client)
Reader/Writer
(server)
READ DATA communications
command sent.
Communications field
Command
execution
RF Tag memory
read/written.
RF Tag A
Response returned.
GET RF TAG ADDITIONAL
INFORMATION command sent.
Response returned.
Reception level
Using an Expanded Command (FC100)
With an expanded command, the maximum size of data that you can read from an RF Tag is 2,048
words.
If an error occurs in the RF Tag communications, the error code is returned with the response. No additional command is required to check the error code.
You can also specify a command option to have the EPC code or reception level returned with the other
data.
Reader/Writer
(server)
Host device
(client)
Communications field
EXPANDED DATA READ
communications command sent.
Command
execution
Response returned
(2,048 words max.)
RF Tag memory
read/written.
RF Tag A
Error code Read data (2,048 words max.)
+ EPC code + Reception level
7-4-4
RF Tag Communications Command Procedure for Multiaccess
Communications
When you send an RF Tag communications command with multiaccess communications, the
Reader/Writer communicates with more than one RF Tag in the communications field.
The Reader/Writer will communicate with all of the RF Tags in the communications field within the communications timeout time (64 max.) and then return a response.
7 - 14
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Using a Normal Command (FC03 or FC16)
With a normal multiaccess RF Tag command, two commands are used to exchange the data, one to set
communications and another to get the results.
Sending the Command to Set Communications
First, send the command to set communications.
If the Reader/Writer detects even one RF Tag, the results of execution are returned as a normal
response.
If no RF Tags were detected, an RF Tag missing error is returned.
Sending the Command to Get the Results
Send the command to get the results.
When you execute the command to get the results, the results of communications with the first
RF Tag that was detected will be returned. The communications results will contain the number
of RF Tags detected, the error code, and, for READ DATA, the EPC code.
Repeatedly Getting the Results
Execute the command to get the results once for every RF Tag that was detected.
The number of RF Tags that was detected by the Reader/Writer is included in the response to
the command to get the results. Repeatedly send the command until the number of RF Tags in
the response is 1.
Reader/Writer
(server)
Host device
(client)
Communications field
SET MULTIACCESS DATA READ
communications command sent.
Timeout (TMO)
RF Tag A
7-4-4 RF Tag Communications Command Procedure for Multiaccess Communications
Command execution
RF Tag memory
read/written.
RF Tag B
RF Tag C
Response returned.
GET MULTIACCESS DATA READ RESULTS communications command sent.
Response returned.
Number of RF Tags: 3 Error code EPC code Read data
+ Reception level
RF Tag A
communications
results
GET MULTIACCESS DATA READ RESULTS communications command sent.
Response returned.
Number of RF Tags: 2 Error code EPC code Read data
+ Reception level
RF Tag B
communications
results
GET MULTIACCESS DATA READ RESULTS communications command sent.
Response returned.
Number of RF Tags: 1 Error code EPC code Read data
+ Reception level
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-4 Communications Procedure
If the option is specified, the reception level information is also attached.
RF Tag C
communications
results
7 - 15
7 Modbus/TCP Communications
Precautions for Correct Use
If you execute another communications command (e.g., a single-access read, write, or fill command or a multiaccess read command) before you execute the commands to get the results,
the multiaccess communications results held in the Reader/Writer will be cleared.
Using an Expanded Command (FC100)
With an expanded command, you can execute one multiaccess RF Tag command to get the communications results from more than one RF Tag with only one command.
Reader/Writer
(server)
Host device
(client)
Communications field
SET MULTIACCESS DATA READ
communications command sent.
Command execution
RF Tag memory
read/written.
Timeout
(TMO)
RF Tag A
RF Tag B
RF Tag C
Response returned.
Response returned.
Number of RF Tags: 3
Error code EPC code Read data
+ RSSI level
RF Tag A
communications results
Error code EPC code Read data
+ RSSI level
RF Tag B
communications results
Error code EPC code Read data
+ RSSI level
RF Tag C
communications results
Precautions for Correct Use
The normal MULTIACCESS DATA READ and MULTIACCESS ID READ communications commands are designed for applications that read two to five RF Tags at one time. If your application requires reading more RF Tags than that, we recommend that you use an expanded
command.
7 - 16
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-5
Commands
The commands that you can send to a Reader/Writer are listed below.
The command codes are used to identify the commands and they are recorded in the most recent command error information and command error log with an error response is returned. (This information is
not included in the Modbus/TCP message format.)
Single-access Communications Commands
Command name
READ ID
WRITE ID
READ DATA
Function code
FC03
FC16
FC03
Register address
4000 hex
4000 hex
0000 to 07FF hex
Command code
0001 hex
0002 hex
0003 hex
1000 to 17FF hex
2000 to 27FF hex
WRITE DATA
FC16
3000 to 3FFF hex*1
0000 to 07FF hex
0004 hex
1000 to 17FF hex
LOCK
DATA FILL
FC16
FC16
3000 to 3FFF hex
8000 hex
8100H hex
7-5 Commands
2000 to 27FF hex
0005 hex
0006 hex
Multiaccess Communications Commands
Command name
SET MULTIACCESS ID READ
GET MULTIACCESS ID READ
RESULTS
SET MULTIACCESS DATA READ
GET MULTIACCESS DATA READ
RESULTS
Function code
FC16
FC03
Register address
Always 9000 hex.
Always 9100 hex.
Command code
0101 hex
0102 hex
FC16
FC03
Always 9200 hex.
Always 9300 hex.
0103 hex
0104 hex
Modbus Expansion Communications Commands
Command name
EXTENDED DATA READ
EXTENDED DATA WRITE
EXTENDED MULTIACCESS ID READ
EXTENDED MULTIACCESS DATA
READ
Function code
FC100
FC100
FC100
FC100
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Subfunction code
0001 hex
0002 hex
0003 hex
0004 hex
Command code
0201 hex
0202 hex
0203 hex
0204 hex
7 - 17
7 Modbus/TCP Communications
Reader/Writer Control Commands
Command name
INITIALIZE
RESET
STOP
RESET FOCUS
Function code
FC16
FC16
FC16
FC16
Register address
A000 hex
A100 hex
A200 hex
A300 hex
Command code
1001 hex
1002 hex
1003 hex
1004 hex
Reader/Writer Setting Commands: Network Settings
Command name
SET TCP/IP COMMUNICATIONS
CONDITIONS
GET TCP/IP COMMUNICATIONS
CONDITIONS
SET DEVICE NAME
GET DEVICE NAME
SET MODBUS/TCP COMMUNICATIONS CONDITIONS
GET MODBUS/TCP COMMUNICATIONS CONDITIONS
SET WEB COMMUNICATIONS
CONDITIONS
GET WEB COMMUNICATIONS
CONDITIONS
SET WEB PASSWORD
GET WEB PASSWORD
Function code
FC16
Register address
B000 hex
Command code
2001 hex
FC03
B000H hex
2002 hex
FC16
FC03
FC16
B100 hex
B100 hex
B200 hex
2003 hex
2004 hex
2005 hex
FC03
B200 hex
2006 hex
FC16
B300 hex
2007 hex
FC03
B300 hex
2008 hex
FC16
FC03
B400 hex
B400 hex
2009 hex
200A hex
Reader/Writer Setting Commands: Device Settings
Command name
SET OPERATION INDICATOR
CUSTOM CONDITIONS
GET OPERATION INDICATOR
CUSTOM CONDITIONS
Function code
FC16
Register address
B800 hex
Command code
5001 hex
FC03
B800 hex
5002 hex
Reader/Writer Setting Commands: Communications Settings
Command name
SET TAG COMMUNICATIONS
CONDITIONS
GET TAG COMMUNICATIONS
CONDITIONS
SET TRANSMISSION POWER
GET TRANSMISSION POWER
SET CHANNEL
GET CHANNEL
SET GEN2 SESSION
7 - 18
Function code
FC16
Register address
C000 hex
Command code
3001 hex
FC03
C000 hex
3002 hex
FC16
FC03
FC16
FC03
FC16
C100 hex
C100 hex
C200 hex
C200 hex
C300 hex
3003 hex
3004 hex
3005 hex
3006 hex
3007 hex
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Command name
GET GEN2 SESSION
SET ACCESS PASSWORD
GET ACCESS PASSWORD
SET RF TAG SELECTION FILTER
CONDITIONS
GET RF TAG SELECTION FILTER
CONDITIONS
SET RSSI FILTER CONDITIONS
GET RSSI FILTER CONDITIONS
SET TRANSMISSION TIME
GET TRANSMISSION TIME
Function code
FC03
FC16
FC03
FC16
Register address
C300 hex
C400 hex
C400 hex
C500 hex
Command code
3008 hex
3009 hex
300A hex
300B hex
FC03
C500 hex
300C hex
FC16
FC03
FC16
FC03
C600 hex
C600 hex
C700 hex
C700 hex
300D hex
300E hex
300F hex
3010 hex
Maintenance Commands: Device Information
Function code
FC03
FC03
FC03
FC03
FC03
FC16
Register address
D000 hex
D100 hex
D200 hex
D300 hex
D400 hex
D400 hex
Command code
4001 hex
4002 hex
4003 hex
4004 hex
4005 hex
4006 hex
Maintenance Commands: Log Information
Function code
FC03
FC16
FC03
FC03
Register address
D600 hex
D700 hex
D800 hex
D900 hex
Command code
4101 hex
4102 hex
4103 hex
4104 hex
Maintenance Commands: RF Communications Information
Command name
Function code
GET RF TAG ADDITIONAL INFOR- FC03
MATION
GET NOISE LEVEL
FC03
GET COMMUNICATIONS DIAGFC03
NOSTIC INFORMATION
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Register address
DA00 hex
Command code
4201 hex
DB00 hex
DC00 hex
4202 hex
4203 hex
7 - 19
7-4-4 RF Tag Communications Command Procedure for Multiaccess Communications
Command name
GET SYSTEM ERROR LOG
CLEAR SYSTEM ERROR LOG
GET COMMAND ERROR LOG
GET MOST RECENT COMMAND
ERROR INFORMATION
7-5 Commands
Command name
GET MODEL INFORMATION
GET FIRMWARE VERSION
GET MAC ADDRESS
GET OPERATING STATUS
GET TIME INFORMATION
SET TIME INFORMATION
7 Modbus/TCP Communications
7-6
V780 Command Details
7-6-1
Single-access Communications Commands
READ ID
 Function
This command reads the ID (i.e., the EPC code) of the RF Tag in the communications field.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
4000 hex
0020 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (4000 hex) that specifies reading the ID
The number of words in the read StoredPC and EPC code (always 0020 hex).
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
StoredPC
0000 hex
0043 hex
FF hex
03 hex
40 hex
2 bytes
Byte-11
…
Byte-3
Byte-4
Byte-5
Byte-9
Byte-10
Byte-72
EPC code
62 bytes
Parameter
StoredPC
Description
Gives the StoredPD data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length. (Refer to StoredPC Bit Format on page
20, below.)
Gives the Tag-specific information according to Gen2 standards.
All bytes of the EPC code section that exceed the EPC word length in the StoredPC
are filled with 00 hex.
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
Additional Information
• StoredPC Bit Format
10
11
12
13
PC + EPC length
16 x (n + 1)
7 - 20
14
15
16
RFU
17
0:EPS
1:AFI
18
19
1A
1B
1C
1D
1E
1F
Data
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception
code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 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)
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
7-6 V780 Command Details
TX: 000000000006FF0340000020
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 21
7 Modbus/TCP Communications
WRITE ID
 Function
This command writes the ID (i.e., the EPC code) to the RF Tag in the communications field.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
2 bytes
FF hex
10 hex
4000 hex
2 bytes
Byte-12
Byte-13
Byte-3
Byte-14
Byte-15
Byte-4
Byte-5
…
Byte-8
Byte-9
Byte-10
Byte-11
Byte-n
Byte
count
EPC length
EPC code
1 byte
2 bytes
0 to 62 bytes
Parameter
Field length
Register address
Word count
Byte count
EPC length
Description
Setting range: 0015 to 0047 hex
The register address (4000 hex) that specifies reading or writing the ID
Setting range: 0001 to 0020 hex
Setting range: 02 to 40 hex
Gives the word size of the EPC code in 4-digit hexadecimal.
EPC code
0000 to 001F hex (0 to 32)
Gives the Tag-specific information according to Gen2 standards.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
2 bytes
2 bytes
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set
The word count from the command is set.
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 22
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception
code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Writing the ID Data to an RF Tag (EPC Length: 0006 Hex, EPC Code: 111122223333444455556666
Hex)
TX: 000000000015FF10400000070E0006111122223333444455556666
RX: 000000000006FF1040000007
7-6 V780 Command Details
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 23
7 Modbus/TCP Communications
READ DATA
 Function
This command reads data from the RF Tag in the communications field.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
2 bytes
2 bytes
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
Specify in 4-digit hexadecimal the start address for reading data.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the number of words of data to read.
Word count
Setting range: 0001 to 0078 hex (1 to 120)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-3
Protocol identifier
0000 hex
Parameter
Byte count
Byte-4
Byte-5
Field length
00 hex
1 byte
Byte-6
Byte-7
Byte-8
Unit
identifier
Function
code
Byte
count
FF hex
03 hex
1 byte
Byte-9
…
Byte-n
Read data
2 to 240 bytes
Description
Contains the number of bytes of data that were read from the RF Tag in 2-digit hexadecimal. (02 to F0 hex)
The data that was read from the RF Tag is attached.
Read data
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 24
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Reading Four Words of Data (1111222233334444 Hex) Starting from Word Address 0123 Hex (User
Area) in the RF Tag
TX: 000000000006FF0331230004
RX: 000000000013FF03081111222233334444
7-6 V780 Command Details
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 25
7 Modbus/TCP Communications
WRITE DATA
 Function
This command writes data to the RF Tag in the communications field.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-4
Byte-5
Byte-6
Byte-7
Byte-8
Byte-9
Byte-1
Byte-11
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
2 bytes
FF hex
10 hex
2 bytes
2 bytes
Byte-13
Byte-3
…
Byte-n
Byte
count
Data to write
1 byte
1 to 120 words
Parameter
Field length
Register address
Description
Setting range: 0009 to 00F7 hex (9 to 247)
Specify in 4-digit hexadecimal the start address for writing data in the RF Tag.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
Word count
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the number of words of data to write.
Byte count
Setting range: 0001 to 0078 hex (120 words max.)
Specify in 4-digit hexadecimal the number of bytes of data to write.
Data to write
Setting range: 02 to F0 hex (240 bytes max.)
Specify the data to write to RF Tag.
Between 1 and 120 words of data can be written with one command.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
2 bytes
2 bytes
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set
The word count from the command is set.
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
• Error Response
Byte-0
Byte-1
Transaction identifier
7 - 26
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Writing Four Words of Data (1111222233334444 Hex) Starting from Word Address 0123 Hex (User
Area) in the RF Tag
TX: 00000000000FFF1031230004081111222233334444
RX: 000000000006FF1031230004
7-6 V780 Command Details
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 27
7 Modbus/TCP Communications
LOCK
 Function
This command locks or unlocks the memory of the RF Tag in the communications field.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000F hex
FF hex
10 hex
8000F hex
0004 hex
Byte-12
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
Byte-16
Byte-17
…
Byte-9
Byte-10
Byte-11
Byte-20
Byte
count
Lock operation
Area to lock/unlock
Password
08 hex
2 bytes
2 bytes
4 bytes
Parameter
Lock operation
Byte-8
Description
Specify locking or unlocking.
0000 hex:
Unlock
0001 hex:
Lock
• If you specify locking the EPC, TID, or user area, you will no longer be able to write data to
that area.
• If you specify locking the access password, you will no longer be able to read the access
password area.
• When you unlock an area, specify all of the areas that have been locked.
Specify one or more of the EPC, TID, and user areas.
Area to
lock/unlock
EPC area: 0001 hex
TID area: 0002 hex
User area: 0004 hex
Access password: 0008 hex
• If all zeros is specified, a command parameter error will occur.
Specify the access password to set in the Tag in 8-digit hexadecimal (32 bits) (00000000 hex).
Password
Locking: The access password to set in the RF Tag to lock.
Unlocking: The access password in the RF Tag to unlock.
Note 1. When an area is locked, the specified password is written to the access password area in the RF Tag.
2. If an address error, lock error, or RF Tag system error occurs when locking an area, the access password area in the RF Tag will be cleared to all zeros.
3. When an RF Tag is unlocked, the access password area in the RF Tag will be cleared to all zeros.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Parameter
Register address
Word count
7 - 28
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Register address
Byte-8
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0006 hex
FF hex
10 hex
2 bytes
2 bytes
Description
The register address from the command is set
The word count from the command is set.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Example 1: Locking the User Area of the RF Tag with a Password of 12345678 Hex
TX: 00000000000FFF1080000004080001000412345678
RX: 000000000006FF1080000004
7-6 V780 Command Details
Example 2: Unlocking the User Area
TX: 00000000000FFF1080000004080000000412345678
RX: 000000000006FF1080000004
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 29
7 Modbus/TCP Communications
DATA FILL
 Function
This command writes the specified data to the specified number of words beginning from the specified write start address. The specifications are made in the command.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000D hex
FF hex
10 hex
8100 hex
0003 hex
Byte-13
Byte-3
Byte-14
Byte-15
Byte-4
Byte-16
Byte-5
Byte-17
Byte-8
Byte-9
Byte-10
Byte-11
Byte-18
Byte
count
Fill information
Fill address
Number of fill
words
Fill data
06 hex
2 bytes
2 bytes
2 bytes
Parameter
Register address
Word count
Byte count
Fill information
Fill address
Description
The register address (8100 hex) that specifies filling data
Number of words of fill information (0003 hex)
Number of bytes of fill information (06 hex)
Specify in 4-digit hexadecimal the start address for writing data in the RF
Tag.
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
Number of fill
words
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the number of words of data to fill.
Setting range: 0000 hex or 0001 to 0800 hex
• If 0000 hex is specified for the number of fill words, the entire memory
area will be filled.
• You cannot write data to more than one area with the same command.
Specify in 4-digit hexadecimal the data to write to the RF Tag.
Fill data
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Parameter
Register address
Word count
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Register address
Byte-8
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0006 hex
FF hex
10 hex
2 bytes
0003 hex
Description
The register address from the command is set
The word count from the command is set.
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-121.
7 - 30
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Example 1: Writing 5A5A Hex to Four Words Starting from Word Address 0100 Hex (User Area) in
the RF Tag
TX: 00000000000DFF108100000306310000045A5A
RX: 000000000006FF1081000003
7-6 V780 Command Details
Example 2: Writing 5A5A Hex to the Entire User Area in the RF Tag
TX: 00000000000DFF108100000306300000005A5A
RX: 000000000006FF1081000003
7-6-1 Single-access Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 31
7 Modbus/TCP Communications
7-6-2
Multiaccess Communications Commands
SET MULTIACCESS ID READ
 Function
This command specifies reading the IDs (i.e., the ECP codes) of the RF Tags in the communications
field.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0009 hex
FF hex
10 hex
9000F hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Options
02 hex
2 bytes
Parameter
Register address
Word count
Byte count
Options
Description
The register address (9000 hex) that specifies setting multiaccess ID reading
The number of words for the option (0001 hex)
The number of option bytes (02 hex)
For details, refer to 7-3 RF Communications Command Options on page 7-9.
Options are implemented in a normal response to the GET MULTIACCESS ID
READ RESULTS on page 7-33.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Word count
0000 hex
0004 hex
FF hex
10 hex
0001 hex
Parameter
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Description
Always 0001 hex.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 32
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Specifying Multiaccess Reading of the IDs by the Reader/Writer with No Options
Example 1: Execution when an RF Tag Is in the Communications Field
TX: 000000000009FF1090000001020000
RX: 000000000004FF100001
Example 2: Execution When an RF Tag Is Not in the Communications Field (Exception Code: 04
Hex (Failure in Device))
TX: 000000000009FF1090000001020000
RX: 000000000003FF9004
GET MULTIACCESS ID READ RESULTS
This command reads data from the RF Tag in the communications field.
You can specify reading up to 2,048 words with one GET MULTIACCESS ID READ RESULTS command.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
9100F hex
2 bytes
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (9100 hex) that specifies getting the results of multiaccess ID
reading
0022 hex + Option size
Word count
• For details on option sizes, refer to 7-3 RF Communications Command Options
on page 7-9.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-11
Byte-12
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
Number of RF
Tags
0000 hex
2 bytes
FF hex
03 hex
1 byte
2 bytes
Byte-76
Byte-77
Byte-78
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
...
Error code
StoredPC
EPC code
2 bytes
2 bytes
62 bytes
Byte-9
Byte-10
Options
Reception level
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
2 bytes
7 - 33
7-6-2 Multiaccess Communications Commands
Parameter
Register address
Byte-3
7-6 V780 Command Details
 Function
7 Modbus/TCP Communications
Parameter
Description
Gives the total number of bytes starting from the unit identifier in 4-digit
hexadecimal.
Field length
0047 hex + Option size
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
Gives the total number of bytes starting from the number of RF Tags in
2-digit hexadecimal.
Byte count
44 hex + Option size
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
Gives the number of RF Tags that were read in 4-digit decimal. (0001 to
001F hex)
Number of RF Tags
The number of RF Tags is decremented when a command response is
returned.
Gives the RF Tag access results in 4-digit hexadecimal.
Error code
0000 hex: Normal end
Not 0000 hex: Error code
StoredPC
• For details on the error codes, refer to ?9-2-1 ?????? (P.9-3)?.
Gives the StoredPC data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Options
Reception level
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
This section may be omitted depending on the option value for the SET
MULTIACCESS ID READ command.
The reception level is attached in signed 4-digit hexadecimal.
FFFF to FF9D hex (−1 to -99 [dBm])
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Specifying Getting the Results of Multiaccess Reading of the IDs by the Reader/Writer with No
Options
There are three RF Tags in the communications field.
 Getting the First Results (Getting the Communications Results for RF Tag A)
TX: 000000000006FF0391000022
RX: 000000000047FF0344000300003000AAAA…AAAA0000…0000
7 - 34
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
*Number of RF Tags: 3, RF Tag A error code + StoredPC + EPC code (The six words of the EPC
length are all AAAA hex.)
 Getting the Second Results (Getting the Communications Results for RF Tag B)
TX: 000000000006FF0391000022
RX:000000000047FF0344000200003000BBBB…BBBB0000…0000
*Number of RF Tags: 2, RF Tag A error code + StoredPC + EPC code (The six words of the EPC
length are all BBBB hex.)
 Getting the Third Results (Getting the Communications Results for RF Tag C)
TX: 000000000006FF0391000022
RX: 000000000047FF0344000120020000…0000
*Number of RF Tags: 1, RF Tag C error code (2002 hex: Communications error)
 Getting the Fourth Results (No Communications Results)
7-6 V780 Command Details
TX: 000000000006FF0391000022
RX: 000000000047FF034400000000…0000
*Number of RF Tags: 0, Remaining data: All 00 hex
7-6-2 Multiaccess Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 35
7 Modbus/TCP Communications
SET MULTIACCESS DATA READ
 Function
This command specifies reading data from the RF Tags in the communications field.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000D hex
FF hex
10 hex
9200F hex
0003 hex
Byte-14
Byte-3
Byte-15
Byte-4
Byte-16
Byte-5
Byte-17
Byte-9
Byte-10
Byte-11
Byte-18
Byte
count
Read area start
address
Read size
Options
06 hex
2 bytes
2 bytes
2 bytes
Parameter
Register address
Read area start address
Byte-8
Description
The register address (9200 hex) that specifies setting multiaccess data reading
Specify in 4-digit hexadecimal the start address for reading data.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
Read size
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the number of words of data to read.
Options
Setting range: 0001 to 0020 hex (1 to 32)
For details, refer to 7-3 RF Communications Command Options on page 7-9.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Word count
0000 hex
0004 hex
FF hex
10 hex
0003 hex
Byte-3
Byte-4
Byte-5
Parameter
Byte-8
Byte-9
Description
Word count
Always 0003 hex.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 36
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Specifying to the Reader/Writer a Multiaccess Data Read of Four Words Starting from Word Address
0123 Hex (User Area) with No Options
Example 1: Execution when an RF Tag Is in the Communications Field
TX: 00000000000DFF109200000306312300040000
RX: 000000000004FF100003
Example 2: Execution When an RF Tag Is Not in the Communications Field (Exception Code: 04
Hex (Failure in Device))
TX: 00000000000DFF109200000306312300040000
RX: 000000000003FF9004
7-6 V780 Command Details
7-6-2 Multiaccess Communications Commands
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 37
7 Modbus/TCP Communications
GET MULTIACCESS DATA READ RESULTS
 Function
This command specifies getting the results of reading data from the RF Tags in the communications
field.
To enable identifying the RF Tags that were read, the StoredPC and EPC code are attached to the
read data.
The number of results data from RF Tag communications stored in the Reader/Writer is decremented when a command response is returned.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
9300 hex
2 bytes
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (9300 hex) that specifies getting the results of multiaccess
data reading
Specify the total number of words starting from the number of RF Tags in the
response in 4-digit hexadecimal.
Word count
0003 to 0022 hex + Option size
• For details on option sizes, refer to 7-3 RF Communications Command Options
on page 7-9.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
Number of RF
Tags
0000 hex
2 bytes
FF hex
03 hex
1 byte
2 bytes
Byte-12
...
Byte-3
...
Byte-4
Byte-5
...
...
...
Byte-10
...
Error code
Read data
Options
2 bytes
2 to 64 bytes
0 to 66 bytes
Byte-11
Byte-12+ n-1
StoredPC
EPC code
Reception level
2 bytes
62 bytes
2 bytes
n: 6 to 132
Parameter
Field length
Description
Gives the total number of bytes starting from the unit identifier in 4-digit hexadecimal.
0009 to 0047 hex + Option size
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
7 - 38
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Byte count
Description
Gives the total number of bytes starting from the number of RF Tags in 2-digit
hexadecimal.
06 to 44 hex + Option size
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
Gives the number of RF Tags that were read in 4-digit decimal. (0001 to 001F
hex)
Number of RF Tags
The number of RF Tags is decremented when a command response is
returned.
Gives the RF Tag access results in 4-digit hexadecimal.
Error code
0000 hex: Normal end
Not 0000 hex: Error code
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Reception level
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
The reception level is attached in signed 4-digit hexadecimal.
7-6 V780 Command Details
StoredPC
• For details on the error codes, refer to ?9-2-1 ?????? (P.9-3)?.
The data that was read from the RF Tag is attached.
This section may be omitted depending on the option value for the SET MULTIACCESS ID READ command.
Gives the StoredPC data in 4-digit hexadecimal.
Read data
Options
FFFF to FF9D hex (-1 to -99 [dBm])
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 39
7-6-2 Multiaccess Communications Commands
Parameter
Exception code
Byte-2
7 Modbus/TCP Communications
 Execution Examples
Specifying Getting the Results of Multiaccess Reading of Four-word Data by the Reader/Writer with
No Options
There are three RF Tags in the communications field.
 Getting the First Results (Getting the Communications Results for RF Tag A)
TX: 000000000006FF0393000006
RX: 00000000000FFF030C00030000AAAA…AAAA
*Number of RF Tags: 3, RF Tag A error code + Read data (All four words are AAAA hex.)
 Getting the Second Results (Getting the Communications Results for RF Tag B)
TX: 000000000006FF0393000006
RX: 00000000000FFF030C00020000AAAA…AAAA
*Number of RF Tags: 2, RF Tag B error code + Read data (All four words are BBBB hex.)
 Getting the Third Results (Getting the Communications Results for RF Tag C)
TX: 000000000006FF0393000006
RX: 00000000000FFF030C000120020000…0000
*Number of RF Tags: 1, RF Tag C error code (2002 hex: Communications error)
 Getting the Fourth Results (No Communications Results)
TX: 000000000006FF0393000006
RX: 00000000000FFF030C000000000000…0000
*Number of RF Tags: 0, Remaining data: All 00 hex
7 - 40
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-6-3
Modbus Expansion Communications Commands
EXTENDED DATA READ
 Function
This command reads data from the RF Tag in the communications field.
You can specify reading up to 2,048 words with one EXTENDED DATA READ command.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Read area start
address
0000 hex
000A hex
FF hex
64 hex
0001 hex
2 bytes
Byte-12
Byte-13
Byte-3
Byte-14
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-15
Options
2 bytes
2 bytes
7-6 V780 Command Details
Read size
Parameter
Subfunction code
Read area start address
Byte-4
Description
0001 hex: EXTENDED DATA READ
Specify in 4-digit hexadecimal the start address for reading data.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
Options
Setting range: 0001 to 0800 hex (2,048 words max.)
For details, refer to 7-3 RF Communications Command Options on page 7-9.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-1
...
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Error code
0000 hex
2 bytes
FF hex
64 hex
0001 hex
0000 hex
...
Byte-3
Byte-4
...
...
Byte-5
...
...
...
Read data
Options
1 to 2,048 words (2 to 4,096
bytes)
0 to 68 bytes
Byte-8
...
Byte-9
...
Byte-10
Byte-11
Byte-n
StoredPC
EPC code
Reception level
Diagnostic results
2 bytes
62 bytes
2 bytes
2 bytes
Note The contents depend on the options specified in the command.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 41
7-6-3 Modbus Expansion Communications Commands
Read size
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the start address for reading data.
7 Modbus/TCP Communications
Parameter
Description
0008 to 1006 hex + Option size
Field length
StoredPC
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
The data that was read from the RF Tag is attached. (Range: 0001 to
0800 hex, in words)
These parameters may be omitted depending on the option value.
Gives the StoredPC data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Reception level
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
The reception level is attached in signed 4-digit hexadecimal.
Read data
Options
Diagnostic
results
FFFF to FF9D hex (-1 to -99 [dBm])
Gives the diagnostic results in 4-digit hexadecimal.
For details, refer to Response Formats on page 7-125 under NTLPxREF
Communications Diagnostic Information.
• Error Response: RF Tag Communications Error
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-3
Byte-4
Byte-5
Byte-6
Byte-7
Byte-8
Byte-9
Byte-10
Byte-11
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Error code
0000 hex
0006 hex
FF hex
64 hex
0001 hex
2 bytes
Parameter
Error code
Description
For details, refer to ?9-2-1 ?????? (P.9-3)?.
• Error Response: Command Error
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
E5 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Reading 2,048 Words of Data Starting from Word Address 0000 Hex (User Area) in the RF Tag with
No Options
Example 1: Execution When an RF Tag Is Not in the Communications Field (Read Data:
1111222233334444…FFFF Hex)
TX: 00000000000AFF640001300008000000
RX: 000000000806FF64000100001111222233334444…FFFF
Example 2: Execution When an RF Tag Is Not in the Communications Field (Error Code: 2001 Hex
(RF Tag Missing Error))
TX: 00000000000AFF640001300008000000
RX: 000000000006FF6400012001
7 - 42
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
EXTENDED DATA WRITE
 Function
This command writes data to the RF Tag in the communications field.
You can specify writing up to 2,048 words with one EXTENDED DATA WRITE command.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Unit
identifier
Function
code
Subfunction code
Write area start
address
0000 hex
000C to 100A hex
FF hex
64 hex
0002 hex
2 bytes
Byte-14
Byte-5
Byte-9
Byte-10
Byte-11
Byte-n
+n
...
Write size
Data to write
Options
2 bytes
1 to 2,048 words (2 to 4,096
bytes)
2 bytes
7-6 V780 Command Details
Parameter
Field length
Subfunction code
Write area start address
Byte-8
Description
Setting range: 000C to 100A hex
0002 hex: EXTENDED DATA WRITE
Specify in 4-digit hexadecimal the start address for writing data in the RF Tag.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the number of words of data to write.
Data to write
Options
Setting range: 0001 to 0800 hex (2,048 words max.)
The data to write
For details, refer to 7-3 RF Communications Command Options on page 7-9.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-12
...
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Field length
Unit
identifier
Function
code
Subfunction code
Error code
0000 hex
2 bytes
FF hex
64 hex
0002 hex
0000 hex
...
Byte-4
...
Byte-5
...
...
...
Byte-8
Byte-9
Byte-10
Byte-11
Byte-n
Options
0 to 68 bytes
StoredPC
EPC code
Reception level
Diagnostic results
2 bytes
62 bytes
2 bytes
2 bytes
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 43
7-6-3 Modbus Expansion Communications Commands
Write size
7 Modbus/TCP Communications
Parameter
Description
Normal completion: 0006 hex + Option size
Field length
StoredPC
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
For details, refer to ?9-2-1 ?????? (P.9-3)?.
These parameters may be omitted depending on the option value.
Gives the StoredPC data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Reception level
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
The reception level is attached in signed 4-digit hexadecimal.
Error code
Options
Diagnostic
results
FFFF to FF9D hex (-1 to -99 [dBm])
Gives the diagnostic results in 4-digit hexadecimal.
For details, refer to Response Formats on page 7-125 under NTLPxREF
Communications Diagnostic Information.
• Error Response: RF Tag Communications Error
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-3
Byte-4
Byte-5
Byte-6
Byte-7
Byte-8
Byte-9
Byte-10
Byte-11
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Error code
0000 hex
0006 hex
FF hex
64 hex
0002 hex
2 bytes
Parameter
Error code
Description
For details, refer to N?9-2-1 ?????? (P.9-3)?.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
E4 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Writing 2,048 Words of Data Starting from Word Address 0000 Hex (User Area) in the RF Tag with
No Options
Example 1: Execution When an RF Tag Is Not in the Communications Field (Error Code: 0000 (Normal Completion))
TX: 00000000100AFF64000230001111222233334444…FFFF0000
RX: 000000000006FF6600010000
Example 2: Execution When an RF Tag Is Not in the Communications Field (Error Code: 2001 Hex
(RF Tag Missing Error))
TX: 00000000100AFF64000230001111222233334444…FFFF0000
RX: 000000000006FF640002200
7 - 44
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
EXTENDED MULTIACCESS ID READ
 Function
This command reads the IDs (EPC codes) of multiple RF Tags in the communications field.
You can get the IDs (EPC codes) of more than one RF Tag with one EXTENDED MULTIACCESS ID
READ command.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Options
0000 hex
0006 hex
FF hex
64 hex
0003 hex
2 bytes
Parameter
Subfunction code
Options
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
0003 hex: EXTENDED MULTIACCESS ID READ
For details, refer to 7-3 RF Communications Command Options on page 7-9.
• Normal Response or Error Response: RF Tag Communications Error
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Number of RF
Tags (m)
0000 hex
2 bytes
FF hex
64 hex
0003 hex
0000 to 0040 hex
Byte-12
...
Byte-3
Byte-4
Byte-12 +
n-1
...
Byte-5
Byte-12+n
*(m-1)
...
Byte-8
Byte-9
Byte-10
Byte-11
Byte-12+(
n*m)-1
Information from RF Tag 1
...
Information from RF Tag m
n = 66 to 68 bytes
...
n = 66 to 68 bytes
StoredPC
EPC code
Options
Reception level
2 bytes
2 bytes
Parameter
62 bytes
2 bytes
Field length
Description
0048 to 0F86 hex + (Option size × m)
Number of RF Tags
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
Gives the number of RF Tags that were detected in 4-digit decimal.
Information
from RF Tag
Error code
StoredPC
0000 to 0040 hex (0 to 64)
For details, refer to ?9-2-1 ?????? (P.9-3)?.
Gives the StoredPC data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Options
Reception
level
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
These parameters may be omitted depending on the option value.
The reception level is attached in signed 4-digit hexadecimal.
FFFF to FF9D hex (-1 to -99 [dBm])
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 45
7-6-3 Modbus Expansion Communications Commands
Information from RF Tag x
Error code
7-6 V780 Command Details
 Response Formats
7 Modbus/TCP Communications
• Error Response: Command Error
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
E4 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution for Reading ID Data from Multiple RF Tags with no Option Specification
Example 1: Execution When Four RF Tags Are in the Communications Field
TX: 000000000006FF6400030000
RX: 000000000116FF6400030004
00003000AAAA…AAAA0000…0000:
RF Tag A error code + StoredPC + EPC code (The six
words of the EPC length are all AAAA hex.)
00003000BBBB…BBBB0000…0000:
RF Tag B error code + StoredPC + EPC code (The six
words of the EPC length are all BBBB hex.)
00003000CCCC…CCCC0000…0000:
RF Tag C error code + StoredPC + EPC code (The six
words of the EPC length are all CCCC hex.)
2002000000000000000000…0000:
RF Tag D error code (2002 hex (communications error))
Example 2: Execution When an RF Tag Is Not in the Communications Field (Exception Code: 04
Hex (Failure in Device))
TX: 000000000006FF6400030000
RX: 000000000003FFE404
7 - 46
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
EXTENDED MULTIACCESS DATA READ
 Function
This command reads data from multiple RF Tags in the communications field.
You can get data from more than one RF Tag with one EXTENDED MULTIACCESS DATA READ
command.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Read area start
address
0000 hex
000A hex
FF hex
64 hex
0004 hex
2 bytes
Byte-14
Byte-3
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-15
Read size
Options
2 bytes
2 bytes
7-6 V780 Command Details
Parameter
Subfunction code
Read area start address
Byte-4
Description
0004 hex: EXTENDED MULTIACCESS DATA READ
Specify in 4-digit hexadecimal the start address for reading data.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
Read size
3000 to 37FF hex: User area
Specify in 4-digit hexadecimal the start address for reading data.
Options
Setting range: 0001 to 0020 hex (1 to 32)
For details, refer to 7-3 RF Communications Command Options on page 7-9.
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Subfunction code
Number of RF
Tags (m)
0000 hex
2 bytes
FF hex
64 hex
0004 hex
0000 to 0040 hex
Byte-12
Byte-3
...
Byte-4
Byte-5
Byte-12 + n - 1
...
Byte-8
Byte-12+n*
(m-1)
Byte-9
Byte-10
Byte-11
Byte-12+
(n*m)-1
...
Information from RF Tag 1
...
Information from RF Tag m
n = 4 to 132 bytes
...
n = 4 to 132 bytes
Information from RF Tag x
Error code
Read data
Options
2 bytes
2 to 64 bytes
0 to 66 bytes
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
StoredPC
EPC code
Reception level
2 bytes
62 bytes
2 bytes
7 - 47
7-6-3 Modbus Expansion Communications Commands
 Response Formats
7 Modbus/TCP Communications
Parameter
Field length
Description
000A to 2106 hex + (Option size × m)
Number of RF Tags
• For details on option sizes, refer to 7-3 RF Communications Command
Options on page 7-9.
Gives the number of RF Tags that were detected in 4-digit decimal.
0000 to 0040 hex (0 to 64)
For details, refer to ?9-2-1 ?????? (P.9-3)?.
The data that was read from the RF Tag is attached.
Error code
Read data
Information
from RF Tag
Options
Stored
PC
EPC
code
Reception
level
The bytes that exceed the word count will be filled with 00 hex.
This section may be omitted depending on the option value for the SET
MULTIACCESS ID READ command.
Gives the StoredPC data in 4-digit hexadecimal.
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
The reception level is attached in signed 4-digit hexadecimal.
FFFF to FF9D hex (-1 to -99 [dBm])
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
E4 hex
1 byte
Note If the exception code is 04 hex (failure in slave device), this format is not used and a response is returned.
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Reading 4 Words of Data Starting from Word Address 0123 Hex (User Area) in Multiple RF Tags
with No Options
Example 1: Execution When Four RF Tags Are in the Communications Field
TX: 00000000000AFF640004312300040000
RX: 00000000002EFF6400040004
0000AAAAAAAAAAAAAAAA:
RF Tag A error code + Read data (4 words, all AAAA
hex)
0000BBBBBBBBBBBBBBBB:
RF Tag B error code + Read data (4 words, all BBBB
hex)
0000CCCCCCCCCCCCCCCC:
RF Tag C error code + Read data (4 words, all CCCC
hex)
2002000000000000000000:
RF Tag D error code (2002 hex (communications error))
Example 2: Execution When an RF Tag Is Not in the Communications Field (Exception Code: 04
Hex (Failure in Device))
TX: 00000000000AFF640004312300040000
RX: 000000000003FFE404
7 - 48
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-6-4
Reader/Writer Control Commands
INITIALIZE
 Function
This command initializes the Reader/Writer settings. (That is, it returns them to the default settings.)
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0009 hex
FF hex
10 hex
A000 hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Options
02 hex
0000 hex
7-6 V780 Command Details
Parameter
Register address
Word count
Byte count
Options
Description
The register address (A000 hex) that specifies initializing settings
The number of words for the option (0001 hex)
The number of option bytes (02 hex)
0000 hex: No options
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-3
Byte-4
Byte-5
Byte-6
Byte-7
Byte-8
Byte-9
Byte-10
Byte-11
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
A000 hex
0001 hex
Parameter
Register address
Word count
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 49
7-6-4 Reader/Writer Control Commands
Transaction identifier
Byte-2
7 Modbus/TCP Communications
 Execution Examples
Execution to Initialize the Reader/Writer Settings
TX: 000000000009FF10A0000001020000
RX: 000000000006FF10A0000001
7 - 50
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
RESET
 Function
This command restarts the entire Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0009 hex
FF hex
10 hex
A100 hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Options
02 hex
2 bytes
Description
The register address (A100 hex) that specifies resetting the Reader/Writer.
The number of words for the option (0001 hex)
The number of option bytes (02 hex)
0001 hex: Repeat
7-6 V780 Command Details
Parameter
Register address
Word count
Byte count
Options
FFFF hex: Forced reset
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
A100 hex
0001 hex
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
Note A response is not returned for forced resetting.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution to Restart the Entire Reader/Writer
TX: 000000000009FF10A1000001020000
RX: 000000000006FF10A1000001
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6-4 Reader/Writer Control Commands
Parameter
Register address
Word count
Byte-3
7 - 51
7 Modbus/TCP Communications
STOP
 Function
This command stops RF Tag communications command execution by the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0009 hex
FF hex
10 hex
A200 hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Options
02 hex
0000 hex
Parameter
Register address
Word count
Byte count
Options
Description
The register address (A200 hex) that specifies stopping execution
The number of words for the option (0001 hex)
The number of option bytes (02 hex)
0000 hex: No options
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
A200 hex
0001 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
Note A response is not returned for forced resetting.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution to Stop RF Tag Communications Command Execution by the Reader/Writer
TX: 000000000009FF10A2000001020000
RX: 000000000006FF10A2000001
7 - 52
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
RESET FOCUS
 Function
This command initializes the target level information of all the RF Tags that are being monitored by
the Reader/Writer in Focus Mode.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0009 hex
FF hex
10 hex
A300 hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Options
02 hex
0000 hex
Description
The register address (A300 hex) that specifies resetting the focus
The number of words for the option (0001 hex)
The number of option bytes (02 hex)
0000 hex: No options
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
A300 hex
0001 hex
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution to Initialize Target Levels of All RF Tags Monitored by Reader/Writer in Focus Mode
TX: 000000000009FF10A3000001020000
RX: 000000000009FF10A3000001020000
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 53
7-6-4 Reader/Writer Control Commands
Parameter
Register address
Word count
Byte-3
7-6 V780 Command Details
Parameter
Register address
Word count
Byte count
Options
7 Modbus/TCP Communications
7-6-5
Reader/Writer Setting Commands: Network Settings
SET TCP/IP COMMUNICATIONS CONDITIONS
 Function
This command sets the TCP/IP communications conditions of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-13
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0015 hex
FF hex
10 hex
B000 hex
0007 hex
Byte-14
Byte-3
Byte-15
Byte-4
...
Byte
count
0E hex
Byte-5
Byte-18
Byte-19
...
Byte-8
Byte-22
Byte-9
Byte-10
Byte-23
...
Byte-11
Byte-26
TCP/IP communications conditions
IP address setting
method
IP address
Subnet mask
Gateway address
2 bytes
4 bytes
4 bytes
4 bytes
Parameter
Register address
Word count
Byte count
IP address setTCP/IP
commu- ting method
nications
conditions
IP address*1
Description
Default setting
The register address (B000 hex) that specifies the TCP/IP communications conditions.
The number of words in the TCP/IP communications conditions (0007 hex)
The number of bytes in the TCP/IP communications conditions (0E hex)
Specify in 4-digit hexadecimal the IP address setting method. 0000 hex
0000 hex: Fixed setting
00001 hex: Obtain from BOOTP server
0002 hex: Get from BOOTP server as fixed settings
Specify in 8-digit hexadecimal the fixed IP addresses to set.
C0A801C8 hex
Setting range: 00000000 to DFFFFFFF hex
Subnet mask
*1
Example: C0A801C8 hex (192.168.1.200)
Specify in 8-digit hexadecimal the subnet mask to set.
FFFFFF00 hex
Setting range: FF000000 to FFFFFFFF hex
Gateway
Example: FFFFFF00 hex (255.255.255.0)
Specify in 8-digit hexadecimal the gateway address to set.
address*1
Setting range: 00000000 to DFFFFFFF hex
C0A801FE hex
Example: C0A801FE hex (192.168.1.254)
*1. Specify 00000000 hex for any IP address setting method other than using a fixed IP address.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
7 - 54
Byte-6
Byte-7
Protocol identifier
Byte-2
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0006 hex
FF hex
10 hex
B000 hex
0007 hex
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Register address
Word count
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
IP address setting method: Fixed, IP address: 192.168.1.200, Subnet mask: 255.255.255.0, Gateway address: 192.168.1.1
TX: 000000000015FF10B00000070E0000C0A801C8FFFFFF00C0A80101
RX: 000000000006FF10B0000007
7-6 V780 Command Details
Execution to Set the Following TCP/IP Communications Conditions in the Reader/Writer
7-6-5 Reader/Writer Setting Commands: Network Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 55
7 Modbus/TCP Communications
GET TCP/IP COMMUNICATIONS CONDITIONS
 Function
This command is used to check the TCP/IP communications conditions that are set in the
Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B000 hex
0007 hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (B000 hex) that specifies the TCP/IP communications conditions.
The number of words of the TCP/IP communications conditions to read (0007 hex)
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0011 hex
FF hex
03 hex
0E hex
...
Byte-18
Byte-19
Byte-11
Byte-3
Byte-4
...
Byte-14
Byte-5
Byte-15
...
Byte-22
TCP/IP communications conditions
IP address setting
method
IP address
Subnet mask
Gateway address
2 bytes
4 bytes
4 bytes
4 bytes
Parameter
Byte count
TCP/IP
communications
conditions
IP address setting method
Description
The number of bytes in the TCP/IP communications conditions that were read (0E hex)
Gives the IP address setting method that was read in 4-digit
hexadecimal.
Default setting
0000 hex
0000 hex: Fixed setting
00001 hex: Obtain from BOOTP server
IP
address*1
Subnet
mask*1
Gateway
address*1
0002 hex: Get from BOOTP server as fixed settings
Gives the IP address that was read in 8-digit hexadecimal.
C0A801C8 hex
Example: C0A801C8 hex (192.168.1.200)
Gives the subnet mask that was read in 8-digit hexadecimal. FFFFFF00 hex
Example: FFFFFF00 hex (255.255.255.0)
Gives the gateway address that was read in 8-digits hexadecimal.
C0A801FE hex
Example: C0A801FE hex (192.168.1.254)
*1. For any IP address setting method except for using a fixed address, 00000000 hex is returned.
7 - 56
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Following TCP/IP Communications Conditions Are Set in the Reader/Writer
IP address setting method: Fixed, IP address: 192.168.1.200, Subnet mask: 255.255.255.0, Gateway address: 192.168.1.1
TX: 000000000006FF03B0000007
RX: 000000000011FF030E0000C0A801C8FFFFFF00C0A80101
7-6 V780 Command Details
7-6-5 Reader/Writer Setting Commands: Network Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 57
7 Modbus/TCP Communications
SET DEVICE NAME
 Function
This command is used to set or clear a name for the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-13
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0047 hex
FF hex
10 hex
B100 hex
0020 hex
...
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-76
Byte
count
Device name
40 hex
64 bytes
Parameter
Register address
Word count
Byte count
Device name
Description
The register address (B100 hex) that specifies the device name
The number of words in the device name (0020 hex)
The number of bytes in the device name (40 hex)
ASCII characters, 64 bytes max.
(63 ASCII characters max. + End code of 00 hex)
If there are fewer than 63 characters, the remaining bytes are filled with 00 hex.
The device name is given with ASCII characters 20 hex (space) to 7E hex (~).
Specify 00 hex for all bytes to clear the device name.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
B100 hex
0020 hex
Byte-3
Parameter
Register address
Word count
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 58
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Reader/Writer Device Name to V780-A001
TX: 000000000047FF10B10000204056363830532D413030310000000000…00
RX: 000000000006FF10B1000020
7-6 V780 Command Details
7-6-5 Reader/Writer Setting Commands: Network Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 59
7 Modbus/TCP Communications
GET DEVICE NAME
 Function
This command is used to check the name that is set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B100 hex
0020 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (B100 hex) that specifies the device name
The number of words in the device name (0020 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
Device name
0000 hex
0043 hex
FF hex
03 hex
40 hex
64 bytes
Parameter
Byte count
Device name
Byte-3
Byte-4
Byte-5
Byte-9
...
Byte-72
Description
The number of words in the device name that was read (40 hex)
The device name that was read is given with up to 64 bytes of ASCII characters (up
to 63 ASCII characters plus the end code (00 hex))
If there are fewer than 63 characters, the remaining bytes are filled with 00 hex.
The device name is given with ASCII characters 20 hex (space) to 7E hex (~).
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Reader/Writer Device Name Is Set to V780-A001
TX: 000000000006FF03B1000020
RX: 000000000043FF034056363830532D413030310000000000…00
7 - 60
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
SET MODBUS/TCP COMMUNICATIONS CONDITIONS
 Function
This command sets the Modbus/TCP communications conditions of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte
count
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0009 hex
FF hex
10 hex
B200 hex
0001 hex
Byte-14
Modbus/TC communications conditions
Port number
02 hex
2 bytes
Description
Default setting
The register address (B200 hex) that specifies the Modbus/TCP communications conditions
The number of words in the Modbus/TCP communications conditions (0001 hex)
The number of bytes in the Modbus/TCP communications conditions (02 hex)
Specify the Modbus/TCP communications port number in 4-digit hexadeci- 01F6 hex (502)
mal.
Setting range: 01F6 hex or 0400 to FFFF hex
Example: 01F6 hex (502)
• IANA manages ports 000 to 03FF hex.
• Normal Response
Byte-0
Byte-1
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
B200 hex
0001 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 61
7-6-5 Reader/Writer Setting Commands: Network Settings
 Response Formats
Transaction identifier
7-6 V780 Command Details
Parameter
Register address
Word count
Byte count
Port
Modbus/TC number
communications
conditions
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Following Modbus/TCP Communications Conditions in the Reader/Writer
Port number: 502
TX: 000000000009FF10B20000010201F6
RX: 000000000006FF10B2000001
7 - 62
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET MODBUS/TCP COMMUNICATIONS CONDITIONS
 Function
This command is used to check the Modbus/TCP communications conditions of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B200 hex
0001 hex
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Default setting
Register address The register address (B200 hex) that specifies the Modbus/TCP communications conditions
Word count
The number of words of the Modbus/TCP communications conditions to read (0001 hex)
Parameter
Description
 Response Formats
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte
count
0000 hex
0005 hex
FF hex
03 hex
02 hex
Byte-9
7-6 V780 Command Details
• Normal Response
Byte-10
Modbus/TC communications conditions
Port number
Parameter
Byte count
Description
The number of bytes in the Modbus/TCP communications conditions that were
read (02 hex)
Gives the Modbus/TCP communications port number in 4-digit hexadecimal.
Port number
Example: 01F6 hex (502)
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Parameter
Exception code
Byte-3
Byte-4
Byte-5
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Following Modbus/TCP Communications Conditions Are Set in the
Reader/Writer
Port number: 502
TX: 000000000006FF03B2000001
RX: 000000000005FF030201F6
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 63
7-6-5 Reader/Writer Setting Commands: Network Settings
Modbus/TC
communications conditions
2 bytes
7 Modbus/TCP Communications
SET WEB COMMUNICATIONS CONDITIONS
 Function
This command sets the Web browser communications conditions of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte
count
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0009 hex
FF hex
10 hex
B300 hex
0001 hex
Byte-14
Web communications conditions
Port number
02 hex
2 bytes
Parameter
Register address
Word count
Byte count
Port
Web
numcomber
munications
conditions
Description
Default setting
The register address (B300 hex) that specifies the Web communications conditions
The number of words in the Web communications conditions (0001 hex)
The number of bytes in the Web communications conditions (02 hex)
Specify the Web communications port number in 4-digit hexadecimal.
1BB2 hex (7090)
Setting range: 0400 to FFFF hex
Example: 1BB2 hex (7090)
• IANA manages ports 000 to 03FF hex.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
B300 hex
0001 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 64
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Following Web Communications Conditions in the Reader/Writer
Port number: 7090
TX: 000000000009FF10B3000001021BB2
RX: 000000000006FF10B3000001
7-6 V780 Command Details
7-6-5 Reader/Writer Setting Commands: Network Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 65
7 Modbus/TCP Communications
GET WEB COMMUNICATIONS CONDITIONS
 Function
This command is used to check the Web browser communications conditions of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B300 hex
0001 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (B300 hex) that specifies the Web communications conditions
The number of words of the Web communications conditions to read (0001 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte
count
0000 hex
0005 hex
FF hex
03 hex
02 hex
Byte-9
Byte-10
Web communications conditions
Port number
Parameter
Byte count
Port numWeb comber
munications
conditions
2 bytes
Description
The number of bytes in the Web communications conditions that were read (02 hex)
Gives the Web communications port number that was read in 4-digit hexadecimal.
Example: 1BB2 hex (7090)
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Parameter
Exception code
Byte-3
Byte-4
Byte-5
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Following Web Communications Conditions Are Set in the Reader/Writer
Port number: 7090
TX: 000000000006FF03B3000001
RX: 000000000005FF03021BB2
7 - 66
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
SET WEB PASSWORD
 Function
This command sets or clears the Reader/Writer login password for the Web browser interface.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0017 hex
FF hex
10 hex
B400 hex
0008 hex
...
Byte-3
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-28
Byte
count
Web password
10 hex
16 bytes
Description
The register address (B400 hex) that specifies the Web password
The number of words in the Web password (0008 hex)
The number of bytes in the Web password (10 hex)
Specify the Web password with up to 16 bytes of ASCII characters (up to 15 ASCII characters
plus the end code (00 hex)).
If there are fewer than 15 characters, fill the remaining bytes with 00 hex.
You can specify ASCII characters 20 hex (space) to 7E hex (~).
To clear the password, specify 00 hex for all of the write data.
 Response Formats
• Normal Response
Byte-1
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
B400 hex
0008 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 67
7-6-5 Reader/Writer Setting Commands: Network Settings
Byte-0
Transaction identifier
7-6 V780 Command Details
Parameter
Register address
Word count
Byte count
Web password
Byte-4
7 Modbus/TCP Communications
 Execution Examples
Setting the Reader/Writer Web Password to “password”
TX: 000000000017FF10B40000081070617373776F72640000000000000000
RX: 000000000006FF10B4000008
7 - 68
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET WEB PASSWORD
 Function
This command is used to check the login password that is set in the Reader/Writer for the Web
browser interface.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B400 hex
0008 hex
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Parameter
Description
Register address The register address (B400 hex) that specifies the Web password
Word count
The number of words in the Web password (0008 hex)
 Response Formats
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
Web password
0000 hex
0013 hex
FF hex
03 hex
10 hex
16 bytes
Parameter
Byte count
Web password
Byte-3
Byte-4
Byte-5
Byte-9
...
Byte-24
Description
The number of bytes in the Web password that was read (10 hex)
Gives the Web password that was read with up to 16 bytes of ASCII characters (up to 15 ASCII characters plus the end code (00 hex)).
If there are fewer than 15 characters, the remaining bytes are filled with
00 hex.
• Error Response
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Reader/Writer Web Password Is Set to “password”
TX: 000000000006FF03B4000008
RX: 000000000013FF031070617373776F72640000000000000000
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 69
7-6-5 Reader/Writer Setting Commands: Network Settings
The Web password is given with ASCII characters 20 hex (space) to 7E
hex (~).
Byte-0
7-6 V780 Command Details
• Normal Response
7 Modbus/TCP Communications
7-6-6
Reader/Writer Setting Commands: Communications Settings
SET TAG COMMUNICATIONS CONDITIONS
 Function
This command sets the communications conditions for the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0011 hex
FF hex
10 hex
C000 hex
0005 hex
Byte-18
Byte-19
Byte-14
Byte-3
Byte-15
Byte-4
Byte-16
Byte
count
0A hex
Byte-5
Byte-17
Byte-8
Byte-20
Byte-9
Byte-21
Byte-10
Byte-11
Byte-22
Communications conditions
RF communications mode
RF communications speed
RF communications timeout time
Write verification
Reserved
2 bytes
2 bytes
2 bytes
2 bytes
0000 hex
Parameter
Register address
Description
Default setting
The register address (C000 hex) that specifies the RF communications conditions
The number of words in the RF communications conditions (0005 hex)
The number of bytes in the RF communications conditions (0A hex)
Specify the communications mode in 4-digit hexadecimal.
0000 hex
Word count
Byte count
Commu- RF communications mode
nications
conditions
RF communications speed
0000 hex: Once
0001 hex: Auto
0002 hex: Focus
Specify the communications speed in 4-digit hexadecimal.
0000 hex
0000 hex: Automatic (default)
0001 hex: High speed
RF communications timeout time
Write verification
0002 hex: Normal speed
Specify the RF communications timeout time.
00FA hex
0001 to EA60 hex (1 to 60,000 [ms])
(250)
Specify in 4-digit hexadecimal whether to perform write veri- 0001 hex
fication.
0000 hex: Disable, 0001 hex: Enable
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Parameter
Register address
Word count
7 - 70
Byte-6
Byte-7
Protocol identifier
Byte-2
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0006 hex
FF hex
10 hex
C000 hex
0005 hex
Description
The register address from the command is set.
The word count from the command is set.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution to Set the Following RF Communications Conditions in the Reader/Writer
RF communications mode: Once, RF communications speed: Auto, RF communications timeout
time: 250 ms, Write verification: Enabled
TX: 000000000011FF10C00000050A0000000000FA00010000
7-6 V780 Command Details
RX: 000000000006FF10C0000005
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 71
7 Modbus/TCP Communications
GET TAG COMMUNICATIONS CONDITIONS
 Function
This command is used to check the RF communications conditions that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C000 hex
0005 hex
Parameter
Register address
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C000 hex) that specifies the RF communications
conditions
The number of words of the RF communications conditions to read (0005
hex)
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
000D hex
FF hex
03 hex
0A hex
Byte-15
Byte-16
Byte-11
Byte-3
Byte-4
Byte-12
Byte-1
Byte-5
Byte-14
Byte-17
Byte-18
Communications conditions
RF communications mode
RF communications speed
RF communications timeout time
Write verification
Reserved
2 bytes
2 bytes
2 bytes
2 bytes
0000 hex
Parameter
Register address
Word count
Byte count
Communications conditions
RF communications mode
Description
Default setting
The register address (C000 hex) that specifies the RF communications
conditions
The number of words in the RF communications conditions (0005 hex)
The number of bytes in the RF communications conditions (0A hex)
Gives the communications mode in 4-digit hexadeci0000 hex
mal.
0000 hex: Once
0001 hex: Auto
RF communications speed
0002 hex: Focus
Gives the communications speed in 4-digit hexadecimal.
0000 hex
0000 hex: Automatic (default)
0001 hex: High speed
RF communications timeout time
Write verification
0002 hex: Normal speed
Gives the RF communications timeout time.
0001 to EA60 hex (1 to 60,000 [ms])
Gives whether write verification is being performed in
4-digit hexadecimal.
00FA hex
(250)
0001 hex
0000 hex: Disable, 0001 hex: Enable
7 - 72
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Following RF Communications Conditions Are Set in the Reader/Writer
RF communications mode: Once, RF communications speed: Auto, RF communications timeout
time: 250 ms, Write verification: Enabled
TX: 000000000006FF03C0000005
7-6 V780 Command Details
RX: 00000000000DFF030A0000000000FA00010000
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 73
7 Modbus/TCP Communications
SET TRANSMISSION POWER
 Function
This command sets the transmission powers of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-13
Byte
count
04 hex
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000B hex
FF hex
10 hex
C100 hex
0002 hex
Byte-14
Byte-3
Byte-15
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-16
Transmission power
Read transmission power
Write transmission power
2 bytes
2 bytes
Parameter
Register address
Word count
Byte count
Transmission
power
Read transmission power
Description
Default setting
The register address (C100 hex) that specifies setting the transmission
powers
The number of words in the transmission power settings (0002 hex)
The number of bytes in the transmission power setting (04 hex)
Specify the transmission power for read RF communi001B hex
cations commands in 4-digit hexadecimal.
(27 [dBm])
Write transmission power
000F to 001B hex (15 to 27 dBm)
Specify the transmission power for write RF communications commands in 4-digit hexadecimal.
001B hex
(27 [dBm])
000F to 001B hex (15 to 27 dBm)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C100 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 74
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Following Transmission Powers in the Reader/Writer
Read transmission power: 27 dBm, Write transmission power: 27 dBm
TX: 00000000000BFF10C100000204001B001B
RX: 000000000006FF10C1000002
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 75
7 Modbus/TCP Communications
GET TRANSMISSION POWER
 Function
This command is used to check the transmission powers that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C100 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C100 hex) that specifies setting the transmission power
The number of words of the antenna setting to read (0002 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0007 hex
FF hex
03 hex
04 hex
Byte-11
Byte-3
Byte-4
Byte-5
Byte-12
Transmission powers
Read transmission power
Write transmission power
2 bytes
2 bytes
Parameter
Byte count
Transmission
Read transmispower
sion power
Write transmission power
Description
Default setting
The number of bytes in the transmission powers (06 hex)
Gives the transmission power for read RF communica- 001B hex
tions commands in 4-digit hexadecimal.
(27 [dBm])
000F to 001B hex (15 to 27 dBm)
Gives the transmission power for write RF communications commands in 4-digit hexadecimal.
001B hex
(27 [dBm])
000F to 001B hex (15 to 27 dBm)
 Execution Examples
Execution When the Following RF Transmission Powers Are Set in the Reader/Writer
Read transmission power: 27 dBm, Write transmission power: 27dBm
TX: 000000000006FF03C1000002
RX: 000000000007FF0304001B001B
7 - 76
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
SET CHANNEL
 Function
This command sets the channel in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0009 hex
FF hex
10 hex
C200 hex
0001 hex
Byte-14
Byte
count
Channel
02 hex
2 bytes
Description
The register address (C200 hex) that specifies the channel
Specify the channel in 4-digit hexadecimal.
Default setting
7-6 V780 Command Details
Parameter
Register address
Channel
0000 hex
0000 hex: Auto
0002 hex: Channel 2
0008 hex: Channel 8
000E hex: Channel 14
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-3
Byte-4
Byte-5
Byte-6
Byte-7
Byte-8
Byte-9
Byte-10
Byte-11
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C200 hex
0001 hex
Parameter
Register address
Word count
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 77
7-6-6 Reader/Writer Setting Commands: Communications Settings
Transaction identifier
Byte-2
7 Modbus/TCP Communications
 Execution Examples
Execution to Set Channel 2 for the Reader/Writer
TX: 000000000009FF10C2000001020002
RX: 000000000006FF10C2000001
7 - 78
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET CHANNEL
 Function
This command is used to check the channel that is set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C200 hex
1 byte
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Parameter
Description
Register address The register address (C200 hex) that specifies the
channel
Word count
Always 0001 hex.
 Response Formats
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
Channel
0000 hex
0005 hex
FF hex
03 hex
02 hex
2 bytes
Parameter
Field length
Byte count
Channel
Byte-3
Byte-4
Byte-5
Byte-9
Description
Byte-10
Default setting
Always 0005 hex.
Always 02 hex.
Gives the channel in 4-digit hexadecimal.
0000 hex
0000 hex: Auto
0008 hex: Channel 8
000E hex: Channel 14
• Error Response
Byte-0
Byte-1
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When Channel 2 Is Set for the Reader/Writer
TX: 000000000006FF03C2000001
RX: 000000000005FF03020002
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 79
7-6-6 Reader/Writer Setting Commands: Communications Settings
0002 hex: Channel 2
Transaction identifier
7-6 V780 Command Details
• Normal Response
7 Modbus/TCP Communications
SET GEN2 SESSION
 Function
This command sets the Gen2 session for the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
009 hex
FF hex
10 hex
C300 hex
0001 hex
Byte-13
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-14
Byte
count
Gen2 Session
02 hex
2 bytes
Parameter
Register address
Word count
Byte count
Gen2 session
Description
Default setting
The register address (C300 hex) that specifies the Gen2 session setting
The number of words in the Gen2 session setting (0001 hex)
The number of bytes in the Gen2 session setting (02 hex)
Specify the session to use for RF Tag communications in 4-digit
0000 hex
hexadecimal.
0000 hex: S0 flag
0001 hex: S1 flag
0002 hex: S2 flag
0003 hex: S3 flag
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C300 hex
0001 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 80
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution to Set S2 as the Gen2 Session for the Reader/Writer
TX: 000000000009FF10C3000001020002
RX: 000000000006FF10C3000001
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 81
7 Modbus/TCP Communications
GET GEN2 SESSION
 Function
This command is used to check the Gen2 session that is set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C300 hex
0001 hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C300 hex) that specifies the Gen2 session
setting
The number of words in the Gen2 session setting to read (0001
hex)
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function code
Byte
count
Gen2 session
0000 hex
0005 hex
FF hex
03 hex
02 hex
2 bytes
Parameter
Byte count
Gen2 session
Byte-3
Byte-4
Byte-5
Byte-9
Byte-10
Description
Default setting
The number of bytes in the Gen2 session setting that was read (02 hex)
Gives the session that is being used for RF Tag communications in 0000 hex
4-digit hexadecimal.
0000 hex: S0 flag (default)
0001 hex: S1 flag
0002 hex: S2 flag
0003 hex: S3 flag
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When S2 Is Set as the Gen2 Session for the Reader/Writer
TX: 000000000006FF03C3000001
RX: 000000000005FF03020002
7 - 82
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
SET ACCESS PASSWORD
 Function
This command sets the access password for RF Tag communications of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000B hex
FF hex
10 hex
C400 hex
0002 hex
Byte-13
...
Byte-3
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-16
Byte
count
Access password
04 hex
4 bytes
Description
Default setting
The register address (C400 hex) that specifies the access password setting
Specify the access password to use for RF Tag communications in 00000000 hex
8-digit hexadecimal.
The specified access password is stored in EEPROM memory in
the Reader/Writer.
If the access password in the RF Tag is not all zeros, the access
password that is stored in EEPROM memory must be used to execute LOCK, WRITE ID, READ DATA, or WRITE DATA commands.
7-6 V780 Command Details
Parameter
Register address
Access password
Byte-4
 Response Formats
• Normal Response
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C400 hex
0002 hex
Parameter
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
Always 0002 hex.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 83
7-6-6 Reader/Writer Setting Commands: Communications Settings
Byte-0
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Reader/Writer Access Password to “12345678 hex”
TX: 00000000000BFF10C40000020412345678
RX: 000000000006FF10C4000002
7 - 84
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET ACCESS PASSWORD
 Function
This command reads the access password that is set for RF Tag communications in the
Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C400 hex
0002 hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C400 hex) that specifies reading the access
password
The number of words in the access password to read (0002 hex)
Word count
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
Access password
0000 hex
0007 hex
FF hex
03 hex
04 hex
4 bytes
Parameter
Byte count
Access password
Byte-3
Byte-4
Byte-5
Byte-9
Description
The number of bytes in the access password (04 hex)
Gives the access password to use for RF Tag communications in
8-digit hexadecimal.
...
Byte-12
Default setting
00000000 hex
If the access password in the RF Tag is not all zeros, the access
password that is stored in EEPROM memory must be used to execute LOCK, WRITE ID, READ DATA, or WRITE DATA commands.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Reader/Writer Access Password Is Set to “12345678 hex”
TX: 000000000006FF03C4000002
RX: 000000000007FF030412345678
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 85
7-6-6 Reader/Writer Setting Commands: Communications Settings
The specified access password is stored in EEPROM memory in
the Reader/Writer.
7-6 V780 Command Details
 Response Formats
7 Modbus/TCP Communications
SET RF TAG SELECTION FILTER CONDITIONS
 Function
This command sets the RF Tag selection filter conditions for the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
002D hex
FF hex
10 hex
C500 hex
0013 hex
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
Byte-16
Byte-17
Byte-18
Byte-8
Byte-19
Byte-9
...
Byte
count
Enable/disable
Address
Data length
Data
26 hex
2 bytes
2 bytes
2 bytes
32 bytes
Byte-10
Byte-11
Byte-50
RF Tag selection filter conditions
Parameter
Register address
Word count
Byte count
RF Tag selection
filter conditions
Enable/disable
Description
Default setting
The register address (C500 hex) that specifies setting the RF Tag selection filter conditions
The number of words in the RF Tag selection filter conditions (0013 hex)
The number of bytes in the RF Tag selection filter conditions (26 hex)
Specify whether to enable or disable RF Tag selection
0000 hex
filter conditions in 4-digit hexadecimal.
0000 hex: Disable
0001 hex: Enable
Set the address (in words) of the RF Tag to check for in
4-digit hexadecimal.
*1.
Address
0000 hex
Setting ranges (word address specifications)
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
3000 to 37FF hex: User area
*1.
Data length
*You cannot specify 0000 to 07FF hex (reserved area).
Specify the number of words of data to check in 4-digit
hexadecimal.
Setting range: 0000 to 0010 hex
Specify the data to check for. (Always 16 words.)
Data*1.
0000 hex
00....00 hex
*Fill unused data with 0000 hex.
*In compliance with Gen2 standards, bits 0 to 255 are
masked, so the last bit of word 16 (bit 256) is ignored.
*1. If the RF Tag selection filter conditions settings are disabled, this value is always 0000 hex.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
7 - 86
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0006 hex
FF hex
10 hex
C500 hex
0013 hex
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Register address
Word count
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Address: 3000 hex, Data length: 1 word, Data to check for: 1234 hex
TX: 00000000002DFF10C500001326000130000001123400…00
RX: 000000000006FF10C5000013
Example 2: Execution When Disabling RF Tag Selection Filter Conditions for the Reader/Writer
7-6 V780 Command Details
Example 1: Execution When Enabling RF Tag Selection Filter Conditions for the Reader/Writer with
the Following Settings
TX: 00000000002DFF10C50000132600000000000000000…00
RX: 000000000006FF10C5000013
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 87
7 Modbus/TCP Communications
GET RF TAG SELECTION FILTER CONDITIONS
 Function
This command reads the RF Tag selection filter conditions that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C500 hex
0013 hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C500 hex) that specifies setting the RF Tag
selection filter conditions
The number of words in the RF Tag selection filter conditions to
read (0013 hex)
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Byte-3
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0028 hex
FF hex
03 hex
26 hex
Byte-11
Byte-4
Byte-12
Byte-5
Byte-13
Byte-14
Byte-15
...
Byte-46
RF Tag selection filter conditions
Enable/disable
Address
Data length
Data
2 bytes
2 bytes
2 bytes
32 bytes
Parameter
Byte count
RF Tag selection
filter conditions
Enable/disable
Description
Default setting
The number of bytes in the RF Tag selection filter conditions (26 hex)
Gives whether RF Tag selection filter conditions are
0000 hex
enabled or disabled in 4-digit hexadecimal.
0000 hex: Disable
0001 hex: Enable
Gives the address (in words) of the RF Tag to check for
in 4-digit hexadecimal.
*1.
Address
0000 hex
1000 to 17FF hex: EPC area
2000 to 27FF hex: TID area
*1.
Data length
*1.
Data
3000 to 37FF hex: User area
Gives the number of words of data to check in 4-digit
hexadecimal.
0000 to 0010 hex
Gives the data to check for. (Always 16 words.)
0000 hex
00....00 hex
*Unused data is filled with 0000 hex.
*In compliance with Gen2 standards, bits 0 to 255 are
masked, so the last bit of word 16 (bit 256) is ignored.
*1. If the RF Tag selection filter conditions settings are being disabled, this value is always 0000 hex.
7 - 88
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When RF Tag Selection Filter Conditions for the Reader/Writer Are Enabled with the Following Settings
Address: 3000 hex, Data length: 1 word, Data to check: 1234 hex
TX: 000000000006FF03C5000013
RX: 000000000029FF0326000130000001123400…00
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 89
7 Modbus/TCP Communications
SET RSSI FILTER CONDITIONS
 Function
This command sets the RSSI filter conditions for the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-12
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000D hex
FF hex
10 hex
C600 hex
0003 hex
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
Byte-16
Byte-17
Byte-8
Byte-9
Byte-10
Byte-11
Byte-18
Byte
count
RSSI filter conditions
Enable/disable
High threshold
Low threshold
06 hex
2 bytes
2 bytes
2 bytes
Parameter
Register address
Word count
Byte count
RSSI filter
Enable/disable
conditions
Description
Default setting
The register address (C600 hex) that specifies the RSSI filter conditions
The number of words in the RSSI filter conditions (0003 hex)
The number of bytes in the RSSI filter conditions (06 hex)
Specify whether the RSSI filter is enabled or disabled in
0000 hex
4-digits hexadecimal.
0000 hex: Disable
*1
0001 hex: Enable
Specify the high threshold for the reception level in signed
4-digit hexadecimal.
0000 hex
*1
FFF6 to FFBA hex (0 or -70 to -10) [dBm]
Specify the low threshold for the reception level in signed
4-digit hexadecimal.
0000 hex
High threshold
Low threshold
FFF6 to FFBA hex (0 or -70 to -10) [dBm]
*1. When you disable the RSSI filter conditions, set the high and low thresholds to 0000 hex. When you enable
the RSSI filter, set the high threshold value for the reception level to a higher value than the low threshold level.
Otherwise, a command parameter error will occur.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C600 hex
0003 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
7 - 90
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
 Execution Examples
Example 1: Execution When Enabling RSSI Filter Conditions for the Reader/Writer with the Following Settings
High threshold: -40 dBm (FFD8 hex), Low threshold: -64 dBm (FFC0 hex)
TX: 00000000000DFF10C6000003060001FFD8FFC0
RX: 000000000006FF10C6000003
Example 2: Execution When Disabling RSSI Filter Conditions for the Reader/Writer
TX: 00000000000DFF10C600000306000000000000
RX: 000000000006FF10C6000003
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 91
7 Modbus/TCP Communications
GET RSSI FILTER CONDITIONS
 Function
This command is used to check the RSSI filter conditions that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C600 hex
0003 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C600 hex) that specifies reading the RSSI filter conditions
The number of words in the RSSI filter conditions to read (0003 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0009 hex
FF hex
03 hex
04 hex
Byte-11
Byte-12
Byte-4
Byte-5
Byte-13
Byte-14
RSSI filter conditions
Enable/disable
High threshold
Low threshold
2 bytes
2 bytes
2 bytes
Parameter
Byte count
RSSI filter
Enable/disconditions
able
Description
Default setting
The number of bytes in the RSSI filter conditions (06 hex)
Gives whether the RSSI filter is enabled or disabled in 4-dig- 0000 hex
its hexadecimal.
0000 hex: Disable
0001 hex: Enable
High threshold Gives the RSSI high threshold level in signed 4-digit hexadecimal.
*1
Low threshold
*1
FFF6 to FFBA hex (0 or −70 to −10) [dBm]
Gives the RSSI low threshold level in signed 4-digit hexadecimal.
0000 hex
0000 hex
FFF6 to FFBA hex (0 or −70 to −10) [dBm]
*1. If the RSSI filter conditions are disabled, the high and low threshold levels will always be 0000 hex.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 92
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution When RSSI Filter Conditions for the Reader/Writer Are Enabled with the Following Settings
High threshold: -40 dBm (FFD8 hex), Low threshold: -64 dBm (FFC0 hex)
TX: 000000000006FF03C6000003
RX: 000000000009FF03060001FFD8FFC0
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 93
7 Modbus/TCP Communications
SET TRANSMISSION TIME
 Function
This command sets the time to stop the transmission power.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000B hex
FF hex
10 hex
C700 hex
0002 hex
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
Byte-9
Byte-10
Byte-11
Byte-16
Byte
count
Stop time
Continuous transmission time
04 hex
2 bytes
2 bytes
Parameter
Register address
Word count
Byte count
Stop time
Byte-8
Description
Default setting
The register address (C700 hex) that specifies setting the transmission times
The number of words in the transmission time setting (0002 hex)
The number of bytes in the transmission time setting (04 hex)
Specify the time to stop the output during RF communications com- 0000 hex
mand execution in 4-digit hexadecimal.
*1
0000 hex or 000A to 03E8 hex
(0000 hex = None, or 10 to 1,000) [ms]
0000 hex
Specify the maximum time to continuously output radio waves
during RF communications command execution in 4-digit hexadecimal.
Continuous transmission time
*1
0000 hex or 0190 to 2710 hex
(0000 hex = Unlimited, or 400 to 10,000) [ms]
*1. If you set a stop time, do not set the continuous transmission time to 0000 hex (unlimited). A command
parameter error will occur if only the stop time or only the continuous transmission time is set to 0.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
C700 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
7 - 94
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Example 1: Execution to Set the Following Times in the Reader/Writer
Stop time: 10 ms (000A hex), Continuous transmission time: 400 ms (0190 hex)
TX: 00000000000BFF10C700000204000A0190
RX: 000000000006FF10C7000002
Example 2: Execution to Set the Following Times in the Reader/Writer
Stop time: None, Continuous transmission time: Unlimited
TX: 00000000000BFF10C70000020400000000
RX: 000000000006FF10C7000002
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 95
7 Modbus/TCP Communications
GET TRANSMISSION TIME
 Function
This command is used to check the transmission times that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
C700 hex
0002 hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (C700 hex) that specifies reading the transmission time settings
Always 0002 hex.
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Byte-3
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0007 hex
FF hex
03 hex
04 hex
Byte-11
Byte-5
Byte-12
Stop time
Continuous transmission time
2 bytes
2 bytes
Parameter
Field length
Byte count
Stop time
Byte-4
Description
Always 0007 hex.
The number of bytes in the transmission times to read (04 hex)
Gives the time that is set to stop the output during RF communications command execution in 4-digit hexadecimal.
Default setting
0000 hex
0000 hex or 000A to 03E8 hex
(0000 hex = None, or 10 to 1,000) [ms]
Gives the maximum time that is set to continuously output radio
waves during RF communications command execution in 4-digit
hexadecimal.
Continuous transmission time
0000 hex
0000 hex, 0190 to 2710 hex (0000 hex: Unlimited, or 400 to 10,000)
[ms]
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 96
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution When the Following RF Transmission Times Are Set in the Reader/Writer
Stop time: 10 ms (000A hex), Continuous transmission time: 400 ms (0190 hex)
TX: 000000000006FF03C7000002
RX: 000000000007FF0304000A0190
7-6 V780 Command Details
7-6-6 Reader/Writer Setting Commands: Communications Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 97
7 Modbus/TCP Communications
7-6-7
Reader/Writer Setting Commands: Device Settings
SET OPERATION INDICATOR CUSTOM CONDITIONS
 Function
This command sets the colors of the NORM/ERR indicators during command execution.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000D hex
FF hex
10 hex
B800 hex
0003 hex
Byte-13
Byte-14
Byte-3
Byte-4
Byte-15
Byte-16
Byte-5
Byte-17
Color to flash once
for normal command execution
Color to flash once
for command error
Color to flash once
for unstable communications
06 hex
2 bytes
2 bytes
2 bytes
Word count
Byte count
Color to flash once
for normal command execution
Byte-9
Byte-10
Byte-11
Byte-18
Byte
count
Parameter
Register address
Byte-8
Description
The register address (B800 hex) that specifies setting operation indicator custom conditions
The number of words in the operation indicator custom condition settings (0003 hex)
The number of bytes in the operation indicator custom condition settings (06 hex)
Specify the color to flash once when V780 command processing ends nor0000 hex
mally in 4-digit hexadecimal.
0000 hex: Default
0001 hex: Green
0002 hex: Red
0003 hex: Yellow
0004 hex: Blue
0005 hex: Cyan
0006 hex: Magenta
0007 hex: White
Color to flash once
for command error
FFFF hex: Do not flash.*1
Specify the color to flash once when V780 command processing ends in an
error in 4-digit hexadecimal.
Color to flash once
for unstable communications
*The color settings are they same as for flashing once for normal command
completion, given above.
0003 hex
Specify the color to flash once when the results of executing communications diagnostics indicates that communications are unstable in 4-digit hexadecimal.
0002 hex
*The colors settings are they same as for flashing once for normal command
completion, given above.
*1. To prevent the NORM/ERR indicators from lighting at all during command execution, set all of the lighting
conditions to “Do not flash.” You cannot prevent them from lighting by setting only individual conditions.
7 - 98
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Precautions for Correct Use
If you set all of the conditions to “Do not flash,” the NORM/ERR indicators will not light at all
even during operation in Focus Mode.
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
B800 hex
0003 hex
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Parameter
Description
Register address The register address from the command is set.
Word count
The word count from the command is set.
• Error Response
Byte-1
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Example 1: Execution to Change to the Following Colors for the NORM/ERR Indicators during Command Execution
Normal completion: Cyan, Error completion: Magenta, Unstable communications: White
TX: 00000000000DFF10B800000306000500060007
RX: 000000000006FF10B8000003
Example 2: Execution to Change the NORM/ERR Indicators to Not Light at All during Command
Execution
TX: 00000000000DFF10B800000306FFFFFFFFFFFF
RX: 000000000006FF10B8000003
7 - 99
7-6-7 Reader/Writer Setting Commands: Device Settings
Execution to Set Operation Indicator Custom Conditions for the Reader/Writer
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6 V780 Command Details
Byte-0
Transaction identifier
7 Modbus/TCP Communications
GET OPERATION INDICATOR CUSTOM CONDITIONS
 Function
This command is used to check the NORM/ERR indicator lighting colors for communications results
that are set in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
B800 hex
0003 hex
Byte-3
Parameter
Register address
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
Default setting
The register address (B800 hex) that specifies the operation indicator custom
settings
The number of words in the operation indicator custom conditions to read (0003
hex)
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0009 hex
FF hex
03 hex
06 hex
Byte-11
Byte-3
Byte-12
Byte-4
Byte-13
Byte-5
Byte-14
Color to flash once
for normal command execution
Color to flash once
for command error
Color to flash once
for unstable communications
2 bytes
2 bytes
2 bytes
Parameter
Byte count
Color to flash once
for normal command execution
Description
The number of bytes in the operation indicator custom settings (06 hex)
Gives the color to flash once when V780 command processing ends normally in 4-digit hexadecimal.
0001 hex
0001 hex: Green
0002 hex: Red
0003 hex: Yellow
0004 hex: Blue
0004 hex: Blue
0006 hex: Magenta
0007 hex: White
Color to flash once
for command error
FFFF hex: Do not flash.
Gives the color to flash once when V780 command processing ends in an
error in 4-digit hexadecimal.
0002 hex
Color to flash once
for unstable communications
*The colors settings are they same as for flashing once for normal command
completion, given above.
Gives the color to flash once when the results of executing communications
diagnostics indicates that communications are unstable in 4-digit hexadecimal.
0003 hex
*The colors settings are they same as for flashing once for normal command
completion, given above.
7 - 100
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution When the Following NORM/ERR Indicator Lighting Colors Are Set for Command Execution by the Reader/Writer
Normal completion: Green, Error completion: Red, Unstable communications: Yellow
TX: 000000000006FF03B8000003
RX: 000000000009FF0306000100020003
7-6 V780 Command Details
7-6-7 Reader/Writer Setting Commands: Device Settings
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 101
7 Modbus/TCP Communications
7-6-8
Maintenance Commands: Device Information
GET MODEL INFORMATION
 Function
This command is used to check the model number of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D000 hex
0010 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D000 hex) that specifies the model number information
The number of words in the model number information to read (0010 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
Model information
0000 hex
0023 hex
FF hex
03 hex
20 hex
32 bytes
Parameter
Byte count
Model information
Byte-3
Byte-4
Byte-5
Byte-9
...
Byte-40
Description
The number of bytes in the model number information that was read (20 hex)
Gives the model information that was read with up to 32 bytes of ASCII characters
(up to 31 ASCII characters plus the end code (00 hex)).
If there are fewer than 31 characters, the remaining bytes are filled with 00 hex.
The model number is given with ASCII characters 20 hex (space) to 7E hex (~).
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
7 - 102
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
 Execution Examples
Execution to Read the Model Number When a V780-HMD68-ETN Reader/Writer Is Being Used
TX: 000000000006FF03D0000010
RX:
000000000023FF0320563738302D484D4436382D45544E0000000000000000000000000000000
00000
7-6 V780 Command Details
7-6-8 Maintenance Commands: Device Information
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 103
7 Modbus/TCP Communications
GET FIRMWARE VERSION
 Function
This command reads the firmware version of the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D100 hex
0006 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D100 hex) that specifies the firmware version
The number of words in the firmware version information to read (0006 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
000F hex
FF hex
03 hex
0C hex
Byte-15
Byte-16
Byte-17
Byte-11
Byte-3
Byte-12
Byte-4
Byte-1
Byte-5
Byte-14
Byte-18
Byte-19
Byte-20
Firmware version
Major version of
Run Mode program
Minor version of
Run Mode program
Run Mode program revision
Major version of
Safe Mode program
Minor version of
Safe Mode program
Safe Mode program revision
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
Parameter
Byte count
Firmware version Major version of Run
Mode program
Minor version of Run
Mode program
Run Mode program revision
Major version of Safe
Mode program
Minor version of Safe
Mode program
Safe Mode program revision
Description
The number of bytes in the firmware version information (0C hex)
0000 to 0099 hex (BCD)
0000 to 0099 hex (BCD)
0000 to 9999 hex (BCD)
0000 to 0099 hex (BCD)
0000 to 0099 hex (BCD)
0000 to 9999 hex (BCD)
• Error Response
Byte-0
Byte-1
Transaction identifier
7 - 104
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception
code
0000 hex
0003 hex
FF hex
83 hex
1 byte
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following Firmware Versions in the Reader/Writer
Run Mode program version: 1.2.3, Safe Mode program version: 1.2.2
TX: 000000000006FF03D1000006
RX: 00000000000FFF030C000100020003000100020002
7-6 V780 Command Details
7-6-8 Maintenance Commands: Device Information
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 105
7 Modbus/TCP Communications
GET MAC ADDRESS
 Function
This command is used to check the MAC address from the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D200 hex
0003 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D200 hex) that specifies the MAC address
The number of words in the MAC address to read (0003 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
MAC address
0000 hex
0009 hex
FF hex
03 hex
06 hex
6 bytes
Parameter
Byte count
MAC address
Byte-3
Byte-4
Byte-5
Byte-9
...
Byte-14
Description
The number of bytes in the MAC address that was read (06 hex)
Gives the MAC address that was read as a 12-digit hexadecimal between
000000000000 and FFFFFFFFFFFF hex.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution to Read a MAC Address of “11-22-33-44-55-66” from the Reader/Writer
TX: 000000000006FF03D2000003
RX: 000000000009FF0306112233445566
7 - 106
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET OPERATING STATUS
 Function
This command is used to check the operating status from the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D300 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D300 hex) that specifies the operating status
The number of words in the Reader/Writer operating status to read (0002 hex)
 Response Formats
• Normal Response
Byte-1
Byte-9
Byte-10
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0007 hex
FF hex
03 hex
04 hex
Byte-11
Byte-3
Byte-4
Byte-5
7-6 V780 Command Details
Byte-0
Transaction identifier
Byte-12
Reader/Writer operating status
Mode
Status
2 bytes
2 bytes
Parameter
Byte count
Reader/Writer
operating status
Mode
0000 hex: Safe Mode
0001 hex: Run Mode
Gives the status of the Reader/Writer that was read in 4-digits hexadecimal.
Status
0001 hex: Idling
0002 hex: RF Tag communications in progress
0003 hex: Changing settings
0004 hex: Error
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception
code
0000 hex
0003 hex
FF hex
83 hex
1 byte
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 107
7-6-8 Maintenance Commands: Device Information
Description
The number of bytes in the Reader/Writer operating status that was read
(0C hex)
Gives the mode of the Reader/Writer that was read in 4-digits hexadecimal.
7 Modbus/TCP Communications
Parameter
Exception code
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following Reader/Writer Operating Status
Mode: Run Mode, Status: Idling
TX: 000000000006FF03D3000002
RX: 000000000007FF030400010001
7 - 108
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET TIME INFORMATION
 Function
This command is used to check the time information from the Reader/Writer.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D400 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D400 hex) that specifies the time information
The number of words in the time information to read (0002 hex)
 Response Formats
• Normal Response
Byte-1
Transaction
identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-2
Field length
Unit
identifier
Function
code
Byte
count
Time information
0000 hex
0007 hex
FF hex
03 hex
04 hex
4 bytes
Byte-3
Byte-4
Byte-5
Byte-9
...
Byte-12
Actual
time
flag:*1
0/1
Hour: 0
to 23
Minutes:
0 to 59
Seconds: 0
to 59
byte
byte
byte
byte
7-6 V780 Command Details
Byte-0
Description
The number of bytes in the time information that was read (04 hex)
Gives the time information that is managed inside the Reader/Writer in 4-digit hexadecimal.
*1 This byte indicates whether the actual time was set from the host device.
0: The time has not been set, so the time information gives the running time since
the power supply to the Reader/Writer was turned ON.
1: The time was set, so the time information is the running time from the time set
from the host device.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 109
7-6-8 Maintenance Commands: Device Information
Parameter
Byte count
Time information
7 Modbus/TCP Communications
 Execution Examples
Execution When the Time Information in the Reader/Writer Is 09:30:10
TX: 000000000006FF03D4000002
RX: 000000000007FF030400091E0A
7 - 110
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
SET TIME INFORMATION
 Function
This command sets the time information in the Reader/Writer.
When the Reader/Writer is restarted, the time information is reset. (All zeros will be set for the actual
time flag, hour, minutes, and seconds.)
 Command Format
Byte-0
Byte-1
Command Format
Byte-12
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
000B hex
FF hex
10 hex
D400 hex
0002 hex
Byte-13
Byte-3
Byte-14
Byte-4
Byte-15
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Byte-16
Time information
Reserved
Hour: 0
to 23
Minutes:
0 to 59
Seconds: 0
to 59
04 hex
1 byte
1 byte
1 byte
1 byte
Parameter
Register address
Word count
Byte count
Time information
7-6 V780 Command Details
Byte
count
Description
The register address (D400 hex) that specifies the time information
The number of words of time information (0002 hex)
The number of bytes of time information (04 hex)
The time to set in the Reader/Writer in 8-digit hexadecimal.
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
D400 hex
0002 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
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7-6-8 Maintenance Commands: Device Information
Transaction identifier
7 Modbus/TCP Communications
 Execution Examples
Execution to Set the Time Information in the Reader/Writer to 09:30:10
TX: 00000000000BFF10D40000020400091E0A
RX: 000000000006FF10D4000002
7 - 112
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-6-9
Maintenance Commands: Log Information
GET SYSTEM ERROR LOG
 Function
This command is used to check the log of system errors that have occurred in the Reader/Writer.
The system error log is retained even when the Reader/Writer is restarted.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D600 hex
0079 hex
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D600 hex) that specifies the system error log information
The number of words in the system error log information to read (0079 hex)
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-11
...
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Field length
Unit
identifier
Function
code
Byte
count
Number of records
0000 hex
00F5 hex
FF hex
03 hex
F2 hex
1 word
...
Byte-26
Byte-27
Byte-4
...
Byte-5
Byte-9
...
Byte-235
Newest record - 1 in system
error log
...
Newest record - 14 in system
error log
Byte-250
16 bytes
16 bytes
...
16 bytes
Time information
Error code
Reserved
Attached information 1
Attached information 2
4 bytes
2 bytes
2 bytes
4 bytes
4 bytes
Parameter
Byte count
Number of records
Newest record Time information
in system error
log
Error code
Newest record
− 1 in system
error log
...
Newest record
− 14 in system
error log
Description
The number of bytes in system error log (F2 hex)
Gives the number of records in the valid data of the system error log.
Gives the time information in 8-digit hexadecimal
(actual time flag, hour, minutes, and seconds).
For details, refer to ?9-2-1 ?????? (P.9-3)?.
Reserved
(Reserved for future use as error device information.)
Attached information 1 Additional error information 1 (00 hex if there is no attached information)
Attached information 2 Additional error information 2 (00 hex if there is no attached information)
-----
...
---
...
---
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
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7-6-9 Maintenance Commands: Log Information
Byte-42
Newest record in system
error log
Byte-10
7-6 V780 Command Details
Parameter
Register address
Word count
Byte-3
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Parameter
Exception code
Byte-3
Byte-4
Byte-5
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following System Error Log in the Reader/Writer
Number of
records
Time information: 09:31:30, Error code: 8011 hex (IP address conflict), Attached information: None
Time information: 09:30:10, Error code: 8012 hex (BOOTP server connection failed),
Newest record − 1
Attached information: None
Newest record
TX: 000000000006FF03D6000079
RX: 0000000000F5FF03F2000201091F1E80110000000000000000000001091E0A8012
0000000000000000.....00
7 - 114
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
CLEAR SYSTEM ERROR LOG
 Function
This command clears the log of system errors (fatal errors) that is stored in the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-12
Byte-13
Byte-2
Byte-6
Byte-7
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Byte-8
Register address
Byte-9
Byte-10
Word count
Byte-11
0000 hex
0009 hex
FF hex
10 hex
D700 hex
0001 hex
Byte-14
Byte
count
Clear type
02 hex
2 bytes
Description
The register address (D700 hex) that specifies clearing the system error log information
The number of words for system error log clear (0001 hex)
The number of bytes for system error log clear (02 hex)
0000 hex: Clear all
Word count
Byte count
Clear type
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
10 hex
D700 hex
0001 hex
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address from the command is set.
The word count from the command is set.
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
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7-6-9 Maintenance Commands: Log Information
Parameter
Register address
Word count
Byte-3
7-6 V780 Command Details
Parameter
Register address
7 Modbus/TCP Communications
 Execution Examples
Execution to Clear the System Error Log in the Reader/Writer
TX: 000000000009FF10D7000001020000
RX: 000000000006FF10D7000001
7 - 116
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET COMMAND ERROR LOG
 Function
This command is used to check the log of command errors that have occurred in the Reader/Writer.
The command error log information is cleared when the Reader/Writer is restarted.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D800 hex
0061 hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D800 hex) that specifies the command error log information
The number of words in the command error log to read (0061 hex)
 Response Formats
Byte-0
Byte-1
Transaction identifier
Byte-11
...
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Field length
Unit
identifier
Function
code
Byte
count
Number of records
0000 hex
00C5 hex
FF hex
03 hex
C2 hex
2 bytes
Byte-34
Byte-4
Byte-35
Byte-5
...
Byte-58
Byte-9
Byte-10
...
Byte-179
Newest record in the command
error log
Newest record - 1 in the command error log
...
Newest record -7 in the command
error log
...
Byte-202
24 bytes
24 bytes
...
24 bytes
IP address of the
remote device
Transaction identifier
Command code
Error code
4 bytes
4 bytes
2 bytes
2 bytes
2 bytes
Reserved
Attached information 1
Attached information 2
2 bytes
4 bytes
4 bytes
Parameter
Number of records
Newest record in Time information
the command
error log
IP address of the
remote device
Transaction identifier
Command code
Error code
Reserved
Attached information 1
Attached information 2
Description
Gives the number of records in the valid data of the system error log.
Gives the time information in 8-digit hexadecimal
(actual time flag, hour, minutes, and seconds).
Gives the IP address that was read in 8-digit hexadecimal.
Example: C0A801C8 hex (192.168.1.200)
The transaction identifier specified in the command that produced the
error
Gives the command code in 8-digit hexadecimal.
For details, refer to ?9-2-1 ?????? (P.9-3)?.
(Reserved for future use as error device information.)
Gives additional information 1 on the error in 16-digit hexadecimal.
Gives additional information 2 on the error in 16-digit hexadecimal.
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7-6-9 Maintenance Commands: Log Information
Time information
7-6 V780 Command Details
• Normal Response
7 Modbus/TCP Communications
Parameter
--Newest record 1 in the command error log
...
...
Newest record -7 --in the command
error log
Description
---
...
---
• Error Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Parameter
Exception code
Byte-3
Byte-4
Byte-5
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following Command Error Log in the Reader/Writer
Number of
records
Newest record
Newest record - 1
Time information: 09:31:30, IP address: 192.168.1.121, Command code: 0004 hex
(WRITE DATA), Error code: 1005 hex (command parameter error), Attached information: None
Time information: 09:30:10, IP address: 192.168.1.120, Command code: 0003 hex
(READ DATA), Error code: 2004 hex (address error), Attached information: None
TX: 000000000006FF03D8000061
RX: 0000000000C5FF03C2000201091F1EC0A80178000000041005000000000000000
0000001091E0AC0A801780000000320040000000000000000…00
7 - 118
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET MOST RECENT COMMAND ERROR INFORMATION
 Function
This command is used to check the most recent command error information from the Reader/Writer.
The most recent command error information is cleared when the Reader/Writer is restarted.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
D900 hex
000C hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (D900 hex) that specifies reading the most recent command
error information
The number of words in the most recent command error information to read (000C
hex)
Word count
7-6 V780 Command Details
 Response Formats
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
001B hex
FF hex
03 hex
18 hex
Byte-9
...
Byte-12
Byte-3
Byte-13
Byte-4
...
Byte-16
Byte-5
Byte-17
Byte-18
Byte-19
Byte-20
Byte-21
Byte-22
Most recent command error information
IP address of the remote
device
Transaction identifier
Command code
Error code
4 bytes
4 bytes
2 bytes
2 bytes
2 bytes
Byte-23
Byte-24
Byte-25
Byte-26
Byte-27
Byte-28
Byte-29
Byte-30
Byte-31
Byte-32
Most recent command error information
Reserved
Attached information 1
Attached information 2
2 bytes
4 bytes
4 bytes
Parameter
Byte count
Most recent com- Time information
mand error infor- IP address of the
mation
remote device
Transaction identifier
Command code
Error code
Reserved
Attached information 1
Attached information 2
Description
The number of bytes in the most recent command error information that
was read (18 hex)
Gives the time information in 8-digit hexadecimal
Gives the IP address that was read in 8-digit hexadecimal.
Example: C0A801C8 hex (192.168.1.200)
The transaction identifier specified in the command that produced the
error
Gives the command code in 8-digit hexadecimal.
For details, refer to ?9-2-1 ?????? (P.9-3)?.
(Reserved for future use as error device information.)
Gives additional information 1 on the error in 8-digit hexadecimal.
Gives additional information 2 on the error in 8-digit hexadecimal.
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7-6-9 Maintenance Commands: Log Information
Time information
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following Most Recent Command Error Information in the Reader/Writer
Time information: 09:31:30, IP address: 192.168.1.121, Command code: 0004 hex (WRITE DATA),
Error code: 1005 hex (command parameter error), Attached information: None
TX: 000000000006FF03D900000C
RX: 00000000001BFF031801091F1EC0A8017800000004100500000000000000000000
7 - 120
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
7-6-10 Maintenance Commands: RF Communications Information
GET RF TAG ADDITIONAL INFORMATION
 Function
This command us used to check the attached information (i.e., the EPC code and reception level)
that resulted from communications for a single-access command with the immediately preceding RF
Tag.
If communications for the immediately preceding single-access command ended in an error,
attached information of 00 hex will be returned.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
DA00 hex
0021 hex
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (DA00 hex) for reading the attached information for RF Tag
communications
Always 0021 hex.
Word count
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-9
Byte-10
Byte-7
Byte-8
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0045 hex
FF hex
03 hex
42 hex
Byte-11
Byte-3
...
Byte-4
Byte-72
Byte-5
Byte-73
Byte-74
StoredPC
EPC code
Reception level
2 bytes
62 bytes
2 bytes
Parameter
StoredPC
Description
Gives the StoredPC data in 4-digit hexadecimal.
EPC code
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
Reception level
All bytes of the EPC code section that exceed the EPC word length in the StoredPC
are filled with 00 hex.
Gives the reception level in signed hexadecimal.
FFFF to FF9D hex (-1 to -99) [dBm]
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7-6-10 Maintenance Commands: RF Communications Information
Byte-6
Protocol identifier
7-6 V780 Command Details
Parameter
Register address
Byte-3
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception
code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution for the Following Attached Information as the Results of Reader/Writer Communications
with the Immediately Preceding RF Tag
StoredPC: 3000 hex, EPC code: 111122223333444455556666 hex, Reception level: -27 (FFE5 hex)
TX: 000000000006FF03DA000021
RX: 000000000045FF0342300011112222333344445555666600…00FFE5
7 - 122
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET NOISE LEVEL
 Function
This command measures the ambient noise level around the Reader/Writer.
 Command Format
Byte-0
Byte-1
Transaction identifier
Byte-2
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
DB00 hex
000F hex
Parameter
Register address
Word count
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (DB00 hex) for getting the noise level
Always 000F hex.
The noise information for channels 1 to 15 is read at the same time.
 Response Formats
7-6 V780 Command Details
• Normal Response
Byte-0
Byte-1
Transaction identifier
Byte-9
Byte-10
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
0021 hex
FF hex
03 hex
1E hex
...
Byte-3
Byte-4
Byte-37
Byte-5
Byte-38
Channel 1 noise
level
...
Channel 15 noise
level
2 bytes
...
2 bytes
Description
Gives the noise level for channel 1 in signed 2-digit hexadecimal.
...
Channel 15 noise level
FFFF to FF9D hex (-1 to -99) [dBm]
...
Gives the noise level for channel 15in signed 2-digit hexadecimal.
FFFF to FF9D hex (-1 to -99) [dBm]
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit
identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
83 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 123
7-6-10 Maintenance Commands: RF Communications Information
Parameter
Channel 1 noise level
7 Modbus/TCP Communications
 Execution Examples
Execution When the Reader/Writer Measures the Following Noise Levels
Channel 1 noise level: -40 dBm (FFD8 hex), Channel 2 noise level: -77 (FFB3 hex), … , Channel 15
noise level: -77(FFB3 hex)
TX: 000000000006FF03DB00000F
RX: 000000000021FF031EFFD8FFB3…FFB3
7 - 124
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
GET COMMUNICATIONS DIAGNOSTIC INFORMATION
 Function
This command gets the most recent communications diagnostic information.
 Command Format
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Protocol identifier
Field length
Unit
identifier
Function
code
Register address
Word count
0000 hex
0006 hex
FF hex
03 hex
DC00 hex
002E hex
Parameter
Register address
Byte-3
Byte-4
Byte-5
Byte-8
Byte-9
Byte-10
Byte-11
Description
The register address (DC00 hex) for reading the communications diagnostic information
The number of words in the communications diagnostic information to read (002E
hex)
Word count
7-6 V780 Command Details
 Response Formats
• Normal Response
Byte-0
Byte-1
Byte-2
Transaction identifier
Byte-6
Byte-7
Byte-8
Protocol identifier
Field length
Unit
identifier
Function
code
Byte
count
0000 hex
005F hex
FF hex
03 hex
5C hex
Byte-9
...
Byte-3
Byte-4
Byte-5
Byte-88
Most recent communications
diagnostic information
92 bytes
...
Byte-12
Byte-13
Byte-14
Byte-15
Byte-16
Byte-17
Byte-18
Byte-19
Byte-20
Communications diagnostic information
Time information
Command code
Error code
Diagnostic results
Detailed diagnostic results
4 bytes
2 bytes
2 bytes
2 bytes
2 bytes
Byte-21
Byte-22
Byte-23
Byte-24
Byte-25
Byte-26
Byte-27
Byte-28
Byte-29
Byte-30
Byte-31
Byte-32
Communications diagnostic information
Reserved 1
Reserved 2
Reserved 3
Reserved 4
Reception level
Noise level
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
Byte-33
Byte-34
Byte-35
Byte-36
Byte-37
Byte-38
Byte-39
...
Byte-100
Communications diagnostic information
Reserved 5
Reserved 6
Stored PC
EPC code
2 bytes
2 bytes
2 bytes
62 bytes
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
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7-6-10 Maintenance Commands: RF Communications Information
Byte-9
7 Modbus/TCP Communications
Parameter
Byte count
Most recent communications diagnostic information
Time information
Command code
Error code
Diagnostic
results
Description
The number of bytes in the most recent communications diagnosis information (5C hex)
Gives the time information in 8-digit hexadecimal
(actual time flag, hour, minutes, and seconds).
Gives the command code in 8-digit hexadecimal.
For details, refer to Exception Code on page 7-7 under Response Format
for Error Completion on page 7-7.
Gives the diagnostic results in 4-digit hexadecimal.
FFFF hex: Error (Set when the error code is not normal.)
0000 hex: Normal
0001 hex: Insufficient power to send
0002 hex: Insufficient power to receive
0003 hex: Too much noise
0005 hex: Insufficient read data (Diagnostic processing for these results
is performed only in Focus Mode.)
Diagnostic
details
0006 hex: Excessive read data (Diagnostic processing for these results is
performed only in Focus Mode.)
Gives the diagnostic details in 4-digit hexadecimal.
Bit 0: Insufficient power to send flag
Bit 1: Insufficient power to receive flag
Bit 2: Too much noise
Bit 3: Reserved
Bit 4: Insufficient data read flag
Bit 5: Excessive data read flag
Bits 6 to 15: Reserved (all zeros)
Reserved 1 to 4
Reception level
*Bits 4 and 5 are output for diagnostic processing only in Focus Mode.
They are not output in any other mode.
0000 hex: No specifications
Gives the reception level in signed 4-digit hexadecimal.
Noise level
FFFF to FF9D hex (-1 to -99) [dBm]
Gives the noise level in signed 4-digit hexadecimal.
Reserved 5 and
Stored PC
EPC code
FFFF to FF9D hex (-1 to -99) [dBm]
0000 hex: No specifications
Gives the StoredPC data of the RF Tag for diagnostics in 4-digit hexadecimal.
The upper 5 bits are the EPC word length.
Gives the Tag-specific information according to Gen2 standards.
All bytes of the EPC code section that exceed the EPC word length in the
StoredPC are filled with 00 hex.
*1. All of the most recent communications diagnostic information will be 00 hex if communications diagnostics
are disabled.
*2. This data is output for diagnostic processing only in Focus Mode. It is not output in any other mode.
7 - 126
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 Modbus/TCP Communications
• Error Response
Byte-0
Byte-1
Transaction identifier
Parameter
Exception code
Byte-2
Byte-6
Byte-7
Byte-8
Protocol identifier
Byte-3
Byte-4
Field length
Byte-5
Unit identifier
Function
code
Exception code
0000 hex
0003 hex
FF hex
90 hex
1 byte
Description
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
 Execution Examples
Execution with the Following Most Recent Communications Diagnostic Information in the
Reader/Writer
Time information: 09:31:30, Command code: 0003 hex (READ DATA), Error code: 0000 hex (normal), Diagnostic results: Insufficient power to send (0001 hex), Diagnostic details: Insufficient power
to send + Insufficient power to receive (0003 hex), Reception level: -41 dBm (FFD7 hex), Noise
level: -70 dBm (FFBA hex), EPC code: 11…11
TX: 000000000006FF03DC00002E
7-6 V780 Command Details
RX: 00000000005FFF035C 01091F1E 0003 0000 0001 0003 0000000000000000 FFD7
FFBA 00000000 30001111…11110000…0000
7-6-10 Maintenance Commands: RF Communications Information
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7 - 127
7 Modbus/TCP Communications
7 - 128
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)

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