Indicates reference to helpful information and explanations for difficult terminology.
Introduction
Introduction
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Introduction
Introduction
Table of Contents
Introduction1
NOTICE1
Trademarks1
Terms and Conditions Agreement2
Precautions for Safe Use4
Precautions for Correct Use6
Meanings of Symbols7
Table of Contents8
Section 1 Product Overview11
Features12
Application Flowchart16
Product Specifications23
Data Characteristics44
Section 2 System Configuration53
System Configuration54
Section 3 Component Names59
Component Names60
Section 4 Installation and Connections67
Installation68
Connections and Wiring80
Section 5 Preparations for Communications87
Starting the Reader/Writer88
Setting Communications Conditions89
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Introduction
Section 6 Functions91
Functions92
Using Communication Diagnostic and the RF Analyzer119
Using Field Extension Mode128
Section 7 Host Communications Specifications147
Modbus Communications Protocol148
Message Details160
Initializing All Settings206
Section 8 Browser Interface207
Introduction
Browser Operation Window208
Operation Interface210
Section 9 Troubleshooting229
Error Descriptions230
Errors and Indicator Status231
Errors and Countermeasures234
Troubleshooting Flowcharts239
About The Ethernet Communication Abnormality244
Cannot Display the Web Browser Operation Window245
Safe Mode251
Section 10 Maintenance and Inspection253
Maintenance and Inspection254
Section 11 Appendices255
Data Characteristics256
Reader/Writer Installation Precautions268
RF Tag Installation Precautions273
RF Tag Memory Capacities and Memory Types319
RF Tag Memory Map320
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Introduction
Introduction
Chemical Resistance of the Reader/Writers and RF Tags324
Degree of Protection329
Differences in Address and Size Specifications between V680 and V680S Reader/Writers331
Revision History332
Firmware Version Update History333
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Section 1
Product Overview
Features12
Application Flowchart16
Product Specifications23
Data Characteristics44
Section 1Product Overview
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Section 1
PLC
Antenna
PLC
Amplifier
ID Controller
Previous OMRON Models
V680S Integrated Reader/Writer
24-VDC
power supply
24-VDC
power supply
Reader/Writer
40
60
80
20
100
Y
-100 -80 -60 -40 -20 020 40 60 80X
Y
X
Read
Write
Product Overview
Features
Section 1 Features
The integrated V680S-series Reader/Writers (V680S-HMD6@-ETN) perform communications with RF Tags
according to query from a host device.
 Integrated Structure
The controller, amplifier, and antenna are integrated into the Reader/Writer for a simple structure.
 Simple Installation
The Reader/Writer is automatically set to the best parameters according to the RF Tags to achieve
stable communications with more consistent communications and less omissions of RF Tags in the
communications field.
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Section 1
Product Overview
 Stable Operation
When the Reader/Writer communicates with an RF Tag, it diagnoses the communications leeway and
reports the result. You can check the communications leeway to appropriately install the Reader/Writer
and RF Tags to achieve stable operation of your OMRON RFID System.
You can use communications leeway diagnosis with Reader/Writers with firmware version 2.00 or higher.
For details, refer to Using Communication Diagnostic and the RF Analyzer in Section 6 Functions.
p.119
If you use the RFID System under installation conditions that provide a high communications leeway,
you can reduce communications troubles during system operation and achieve stable line operation.
Area of stable communications
Area of unstable communications
Area of stable communications
Area of unstable communications
Area of stable communications
Area of unstable communications
Section 1 Features
Operation Indicator lights greenOperation Indicator lights yellowOperation Indicator lights red
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Section 1 Features
Switching Hub
PLC
Easy Addition of Reader/Writers Using an Ethernet Hub
* The DC Power Supply is needed to operate the devices.
24-VDC
power supply
24-VDC
power supply
24-VDC
power supply
Reader/Writer
Reader/Writer
Reader/Writer
Section 1
Product Overview
 Simple Connection
The highly generic Ethernet is used to connect to the host device to enable easy connection with
Ethernet cable without any restrictions from the host PLC manufacturer. A Switching Hub can be used
to easily connect more than one RFID System.
Set the IP address to avoid conflicts.
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Section 1
Switching Hub
PLC
Personal computer
Reader/Writer
24-VDC
power supply
Product Overview
 Easy Operation
A Web server is provided so that you can easily perform setup and status monitoring by connecting to
a computer, without the need for any special software.
Section 1 Features
You can connect a computer to the Switching Hub to easily set up the Reader/Writers and check the
status of the Reader/Writers.
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Section 1
p.268
Checking the Installation Environment
Refer to Reader/Writer Installation Precautions in Section 11 Appendices to confirm the conditions under which
the RFID System will not be influenced by surrounding metal on the Reader/Writer or mutual interference
between Reader/Writers.
p.68
Installation
Install the Reader/Writer with four M4 screws.
V680S-HMD63-ETN: Use two screws.
V680S-HMD64-ETN/-HMD66-ETN: Use four screws.
p.80
Connections and Wiring
You must connect the power supply lines (24 VDC and 0 VDC) and the operation mode signal line in the V680SA41@M/-A51@M Cable.
Wire colorMeaningConnected toApplicable wire
Brown24 VDC+V DC output terminal
AWG20
Blue0 VDC-V DC output terminal
Violet
Control signalRun Mode: +V DC output terminal
Safe Mode: -V DC output terminal*
AWG24
Note: If you start the Reader/Writer with the control signal connected to the -VDC side of the power supply, the Reader/Writer
will start in Safe Mode.
Insert the V680S-A41@M/-A51@M Cable into the connector on the Reader/Writer and turn the cable connector on
the Reader/Writer end clockwise to lock it in place.
Connect the RJ45 connector on the V680S-A41@M/-A51@M Cable to an Ethernet port on the host device.
* Connect the RJ45 connector to the Switching Hub when you use Switching Hub.
Preparations
Product Overview
Application Flowchart
Section 1 Application Flowchart
A simple application flowchart is described below. For correct application methods and details, refer to the
reference page or section given for each step.
M4 screw
Spring washer
Flat washer
M4 screw
Spring washer
Flat washer
Blue
Brown, Violet
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Section 1
p.89
Setting Reader/Writer Communications Conditions
Change the network settings of the host device to match those of the Reader/Writer.
Host Device Setting Example
IP address: 192.168.1.100
Subnet mask: 255.255.255.0
he default network settings for the Reader/Writer are listed in the following table.
IP address192.168.1.200
Subnet mask255.255.255.0
Default gateway192.168.1.254
Port number502
Port number for Web browser7090
Start a web browser (e.g., Internet Explorer) on the host computer, enter http://192.168.1.200/ in the address box, and press the
Enter Key. Communications will be possible if the following view appears.
p.92
Communications Test with Host Device
Communications Preparations
Trial Operation
Product Overview
Section 1 Application Flowchart
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Section 1 Application Flowchart
p.119
Using Communication Diagnostic to Check Communications Leeway
1. Connect the Ethernet cable, turn ON the power supply to the Reader/Writer, and then start a
Web browser on a computer.
2. Specify the IP address of the Reader/Writer in the address field of the web browser.
Enter http://192.168.1.200/ if you are using the default IP address.
3. The Communications Setting View will be displayed.
Trial Operation
Section 1
Product Overview
http:// (IP address)
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p.123
Using the RF Analyzer to Check the Results of Communication Diagnostic
1. Display the RF Analyzer View.
2. Click the Show Button in the Details column and follow the guidance to check the probable
causes and corrections.
Trial Operation
Section 1
Product Overview
Section 1 Application Flowchart
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Section 1
3. In this example, the position of the Tag is corrected according to the guidance.
4. You can check the graph display to check quantitative information on the degree of instability.
When you are finished, perform the step to communicate with the RF Tag again and check to see if
stable communications have been achieved.
Trial Operation
Product Overview
Section 1 Application Flowchart
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p.160
Communications with Actual Queries
The Reader/Writer can perform various types of communications with RF Tags.
NameDescriptionPage
READ DATAReads data from an RF Tag in the communications field.p.160
WRITE DATAWrites data to an RF Tag in the communications field.p.161
READ IDReads the ID code from an RF Tag in the communications field.p.162
COPY DATAUses two Reader/Writers to copy data from the memory of an RF Tag in the
communications field of one Reader/Writer (A) to the memory of the RF Tag in
the communications field of another Reader/Writer (B).
p.163
DATA FILLWrites the specified data to the specified number of words beginning from the
specified start address. The specifications are made in the query.
p.165
LOCKThis query locks the specified memory in the RF Tag.
It will no longer be possible to write data to the locked memory. The lock
cannot be released.
p.166
RF TAG OVERWRITE
COUNT CONTROL
Used to manage the number of times data is written to an RF Tag. You can
use this query for RF Tags with EEPROM memory.
p.167
RESTORE DATAThis query reads the restore information from the Reader/Writer.p.168
Two nuts and one split pin are provided with the V680-A80 Attachment. You must provide any replacement split pins.
 V680-D1KP58HTN
Use the following procedure to install an RF Tag with the V680-A80 Attachment.
1. Attach the Attachment to the workpiece.
2. Tighten the lock nut.
Use a tightening torque of 21 to 42 N·m.
Section 4
Section 4 Installation
3. Place the RF Tag in the Attachment.
The RF Tag can be attached in either direction. The direction does not
affect operation.
4. Insert the split pin into the 3.2-diameter hole and spread open
the end of the pin to prevent it from coming out.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680-D1KP58HTN.
p.273
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Section 4
Marked side
M3 screw
Mounting Hole Dimensions
Two, M3 holes
32
±0.2
32±0.2
Marked side
M3 screw
Mounting Hole Dimensions
Two, M3 holes
32
±0.2
32±0.2
25±0.2
25±0.2
Screw mounting
Metal plate
V680-D1KP66MT
34
(Unit: mm)
34
Material: Steel
Two, M3 holes
Installation and Connections
 V680-D8KF67
Mount the RF Tag with M3 screws.
Tighten the screws to a torque of 0.6 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680-D8KF67.
p.273
Section 4 Installation
 V680-D8KF67M
Mount the V680-D8KF67M to a metal surface.
Mount the RF Tag with M3 screws.
Tighten the screws to a torque of 0.6 N·m.
When you install the RF tag, prepare the metal plate as shown in the figure below.
When the metal plates size is larger than the below illustration, communication range will change.
Please confirm the influence well.
Although it is possible to use SUS, aluminum or brass in addition to steel as metal plate, communications range is
influenced by the material. Do not use resin as metal plate.
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Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of surrounding metal, Mutual
Interference of RF Tags and Influence of Inclination on the V680-D8KF67M.
p.273
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Section 4
44
76
Two, M4 holes
M4 screw
Spring washer
Flat washer
Marked side
(Unit: mm)
Installation and Connections
 V680-D8KF68A
Mount the RF Tag with M4 screws.
Tighten the screws to a torque of 0.7 to 1.2 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680-D8KF68A.
p.273
Section 4 Installation
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Section 4
Marked side
M3 screw
Mounting Hole Dimensions
Two, M3 holes
32
±0.2
32±0.2
Marked side
M3 screw
Mounting Hole Dimensions
Two, M3 holes
32
±0.2
32±0.2
Installation and Connections
 V680S-D2KF67/-D8KF67
Mount the RF Tag with M3 screws.
Tighten the screws to a torque of 0.6 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680S-D2KF67.
p.273
Section 4 Installation
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680S-D8KF67.
p.273
You can use the V680S-D8KF67 with Reader/Writers with firmware version 2.00 or higher.
 V680S-D2KF67M/-D8KF67M
Mount the V680-D8KF67M to a metal surface.
Mount the RF Tag with M3 screws.
Tighten the screws to a torque of 0.6 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of surrounding metal, Mutual
Interference of RF Tags and Influence of Inclination on the V680S-D2KF67M.
p.273
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of surrounding metal, Mutual
Interference of RF Tags and Influence of Inclination on the V680S-D8KF67M.
p.273
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You can use the V680S-D8KF67M with Reader/Writers with firmware version 2.00 or higher.
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Section 4
44
76
Two, M4 holes
M4 screw
Spring washer
Flat washer
Marked side
(Unit: mm)
44
76
Two, M4 holes
M4 screw
Spring washer
Flat washer
Marked side
(Unit: mm)
Installation and Connections
 V680S-D2KF68/-D8KF68
Mount the RF Tag with M4 screws. Tighten the screws to a torque of 0.7 to 1.2 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680S-D2KF68.
p.273
Section 4 Installation
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of metal at the back surface,
Mutual Interference of RF Tags and Influence of Inclination of the V680S-D8KF68.
p.273
You can use the V680S-D8KF68 with Reader/Writers with firmware version 2.00 or higher.
 V680S-D2KF68M/-D8KF68M
Mount the RF Tag with M4 screws. Tighten the screws to a torque of 0.7 to 1.2 N·m.
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of surrounding metal, Mutual
Interference of RF Tags and Influence of Inclination on the V680S-D2KF68M.
p.273
Refer to RF Tag Installation Precautions in Section 11Appendices for information on the effect of surrounding metal, Mutual
Interference of RF Tags and Influence of Inclination on the V680S-D8KF68M.
p.273
You can use the V680S-D8KF68M with Reader/Writers with firmware version 2.00 or higher.
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Section 4 Connections and Wiring
Section 4
Installation and Connections
Connections and Wiring
Connecting and Removing the Reader/Writer Cable
 Connecting Method
1. Hold the connector on the Cable and insert it into
the connector on the Reader/Writer.
Do not apply 30 N or more power to the connector of
the Reader/Writer.
2. Turn the Cable connector clockwise to lock Turn
the Cable connector clockwise to lock it in place.
it in place.
Recommended tightening torque: 0.39 to 0.49 N·m
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 Removal Method
1. Turn the Cable connector counterclockwise to
release the lock.
2. Hold the base of the Cable connector and pull it
straight out.
Section 4
Installation and Connections
If the connector is difficult to remove, press on the
Reader/Writer and pull on the connector. Never pull
on the Cable with excessive force. Doing so may
break the wires and cause malfunction.
Section 4 Connections and Wiring
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Section 4
 V680S-A41 / -A51
 V680S-A42
Installation and Connections
Attaching Ferrite Core
If you use the V680S-HMD66-ETN, attach the ferrite core that is provided with the Reader/Writer to the
V680S-A41M/-A42M/-A51M Cable.
You do not need to attach a V680S-A40M/-A50M Extension Cable.
Power supply lines: Brown (+24V),Blue(0V)
Control signal line: Purple
Section 4 Connections and Wiring
Ferrite core
Ferrite core
V680S-A4 is a standard cable. The wire color is gray.
V680S-A5 is a robot instrumentation cable. The wire color is black.
1. Wrap the power supply lines and Control
signal line together around the ferrite core
once. The ferrite core should be within 5cm
from the tip of the cable.
5cm
Power supply lines: Brown (+24V),Blue(0V)
Control signal line: Purple
5cm
Power supply line: +24V
(Brown)
Power supply line: 0V
(Blue)
Control signal line
(Purple)
2. Close the ferrite core until you hear it click
into place.
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Section 4
Installation and Connections
Connecting the V680S-A41@M/-A51@M Cable to the Host Device
 Power Supply and Operation Mode Signal
You must connect the power supply lines (24 VDC and 0 VDC) and the operation mode signal line in
the V680S-A41@M/-A51@M Cable.
Wire colorMeaningConnected toApplicable wire
Brown24 VDC+V DC output terminal
Blue0 VDC-V DC output terminal
Violet
Note: If you start the Reader/Writer with the control signal connected to the -VDC side of the
power supply, the Reader/Writer will start in Safe Mode.
Control signalRun Mode: +V DC output terminal
Safe Mode: -V DC output terminal*
AWG20
AWG24
Refer to Safe Mode in Section 9Troubleshooting for information on Safe Mode.
p.251
Connect the three terminals correctly. Otherwise, the Reader/Writer may be damaged.
 Power Supply
Use a power source that meets the following conditions.
Conditions
Power supply voltageOutput currentSafety directive
24 VDC -15% to +10% 500 mA DC or higherUL Class 2
 Connecting the Host Device
Connect the RJ45 connector on the V680S-
A41@M/-A51@M Cable to an Ethernet port on the
host device.
Press in the connector until it locks into place.
Section 4 Connections and Wiring
Use a device supporting STP cables for the host
device (such as a Switching Hub or PLC) which is
connected the specified Cables (V680S-A41 @M/-
A51 @M). Ground the host device to a ground
resistance of 100 Ω or less.
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Section 4 Connections and Wiring
Section 4
Installation and Connections
Extending the Cable
 Connecting Method
1. Insert the connector on the V680S-A41@M/-
A51@M Cable into the connector on the V680S-
A40@M/-A50@M Extension Cable.
2. Turn the connector on the V680S-A41@M/-
A51@M Cable clockwise to lock it in place.
Recommended tightening torque: 0.39 to 0.49 N·m
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Section 4
Name
TXP
TXN
RXP
RXN
FunctionName
TD+
TD-
RD+
RD-
Wire color
Orange/White
Orange
Green/White
Green
M12 ConnectorV680S-A42
M
Transmitted data (+)
Transmitted data (-)
Received data (+)
Received (-)
Function
Ethernet send data +
Ethernet send data Ethernet receive data +
Ethernet receive data -
M12 Connector
Power supply lines, Control signal line
V680S-A42M
Installation and Connections
Assembling and Connecting the V680S-A42@M Cable and Connector
 Assembly Method
Follow the table below, assemble the connector.
Prepare the shielded-connectors according to the application.
Wire colorNameFunctionApplicable wire
Brown24P+24VAWG20
(Drain wire)FGFrame ground---
PurpleCONTControl signalAWG24
OrangeTD-Ethernet send data -AWG24
Green/White(stripe)RD+Ethernet receive data +AWG24
Orange/White(stripe)TD+Ethernet send data +AWG24
Blue24N0VAWG20
GreenRD-Ethernet receive data -AWG24
 Example Connection
Section 4 Connections and Wiring
Following the instructions of the manufacturer of the connector, ground connecting the FG with the connector side.
 Connecting the Host Device
Connect the connector on the V680S-A42@M Cable to an Ethernet port on the host device.
The Reader/Writer supports for Auto-MDIX, can communicate by both straight and cross ethernet lines.
Use a device supporting STP cables for the host device (such as an Ethernet switch or PLC) which is connected the
specified Cables (V680S-A42 @M). Ground the host device to a ground resistance of 100 Ω or less.
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Section 4 Connections and Wiring
Section 4
Installation and Connections
MEMO
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Section 5
Preparations for Communications
Starting the Reader/Writer88
Setting Communications Conditions89
Section 5Preparations for Communications
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Section 5
Preparations for Communications
Starting the Reader/Writer
Reader/Writer Starting Procedure
1. Connect the Cable to the Reader/Writer.
Refer to Connecting and Removing the Reader/Writer Cable in Section 4 Installation and Connections for the connector method.
p.80
2. Connect the power supply lines and the operation mode signal line in the Cable to the power source
and connect the RJ45 connector to an Ethernet port on the host device.
Refer to Connecting the V680S-A41@M/-A51@M Cable to the Host Device in Section 4 Installation and Connections for the
connector method.
p.83
Section 5 Starting the Reader/Writer
3. Turn ON the power supply to start the Reader/Writer.
If the Reader/Writer starts normally, the RUN indicator will light green.
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Preparations for Communications
Setting Communications Conditions
Initial Setting Procedure
 Default TCP/IP Network Settings in the Reader/Writer
The default network settings for the Reader/Writer are listed in the following table.
Change the network settings of the host device to match those of the Reader/Writer.
IP address192.168.1.200
Subnet mask255.255.255.0
Default gateway192.168.1.254
Port number502
Port number for Web browser7090
 Host Device Setting Example
IP address: 192.168.1.100
Subnet mask: 255.255.255.0
This example changes the last part of the IP address of the host device to a value other than 200 (i.e., 1 to 199 or 201
to 254). Values of 0 and 255 cannot be used.
Section 5
Section 5 Setting Communications Conditions
Refer to Configuration in Section 8 Browser Interface for Initial Setting method for the Reader/Writer.
p.224
List of Settings
 Setting Procedure for Web Server
Enter the settings on the Network Settings display and then click the Set Button.
Refer to Network Settings View in Section 8Browser Interface for Initial Setting method.
p.212
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Section 5
Preparations for Communications
 Setting Procedure for Modbus Queries from the Host Device
You can set the following items with a SET TCP/IP COMMUNICATIONS CONDITIONS query.
• IP address
• Subnet mask
• Gateway address
Refer to SET TCP/IP COMMUNICATIONS CONDITIONS in Section 7Host Communications Specifications for the setting
method for Modbus queries from the host device.
p.173
Section 5 Setting Communications Conditions
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Section 6
Functions
Functions92
Using Communication Diagnostic and the RF Analyzer 119
Using Field Extension Mode128
Section 6Functions
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Section 6 Functions
Section 6
Functions
Functions
Operation Mode
The Reader/Writer has two operation modes: Run Mode, and Safe Mode.
You can use the control signal to the Reader/Writer connector to change between these modes.
 Run Mode
When you connect the control signal to the 24-VDC side of the power supply and turn ON the power
supply, the Reader/Writer will start in Run Mode.
In Run Mode, operation is performed according to queries from the host device and the results are
returned to the host device as responses.
 Safe Mode
When you connect the control signal to the 0-VDC side of the power supply and turn ON the power
supply, the Reader/Writer will start in Safe Mode. The Safe Mode is used when you do not remember
the IP address that is set in the Reader/Writer. In Safe Mode, the Reader/Writer will start with the
following IP settings.
IP address: 192.168.1.200
Subnet mask: 255.255.255.0
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Section 6
Functions
RF Tag Communications
 Communications Options
Communications with the RF Tag are performed according to one of the communications options that
are listed in the following table.
The setting of the communications option is effective immediately after it is changed. It is saved in
internal memory in the Reader/Writer even after the power supply is turned OFF.
NameDescription
OnceWhen the Reader/Writer receives a query, it returns a response.
AutoAfter the Reader/Writer receives a query, the Reader/Writer automatically detects an RF Tag that
enters the communications field and communicates with it.
Communication can be carried out without confirming the existence of an RF tag by a sensor or
the like.
FIFO TriggerWhen the Reader/Writer receives a query, it communicates with an RF Tags and returns a
response when communicating with an RF Tag was possible.
The Reader/Writer can communicate with the another RF tag when the new RF tag comes in the
communication area, because the Reader/Writer stops the operation of the RF tag once
communicated.The Reader/Writer does not communicate with the RF tag once communicated
until the RF tag goes out of the communication area and enters the communication area again.
FIFO Trigger has the following two setting modes.
•Without ID code check
Process communication with RF tags without ID code check. Compared “With ID code check”,
communication time becomes shorter. However, if the next tag enters the communication area
during communication processing with the RF tag, there is a possibility of reading the data of the
next RF tag.
It is the same communication function as the FIFO Trigger of the reader / writer of firmware version
“3.01 or earlier”
•With ID code check
Communication with RF tag is processed with ID code check. Even if the next tag enters the
communication area during communication processing with the RF tag, it will not read the data of
the next RF tag. RF tags can be installed at narrow pitch. However, compared with “Without ID
code check”, communication time will be longer. Therefore, in order to ensure reliable
communication with the RF tag you want to communicate, we recommend “With ID code check”.
It can be used with a reader / writer with firmware version “3.02 or later”.
“ID code” is a unique ID previously stored in each RF tag. By performing ID code check, even if an RF tag with another
ID code enters the communication area during communication processing, it does not communicate with that RF tag.
Refer to RF Tag Communications Time (for Reference Only) in Section 11 Appendices for details of Communications Time.
p.264
Section 6 Functions
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Section 6
RF Tag
Reader/Writer
The Reader/Writer communicates with the RF Tag in the
communications field of the antenna when the host device
sends a query.
If there is no RF Tag, an RF Tag missing error will occur.
If an RF Tag communications error occurs, an error is
detected according to the nature of the error.
Host deviceReader/Writer
Host device
Reader/Writer
Reader/Writer
RF Tag
RF Tag operation
Once communication
Communications
processing
Response
RF Tag
Processing completed.
Reader/Writer
The Reader/Writer communicates with any RF Tag that
enters the communications field and returns the result to
the host device. Then the Reader/Writer waits for
another query.
RF Tag
Waiting for RF Tag
RF Tag
Host device
Reader/Writer
Host device
Reader/Writer
Reader/WriterRF Tag
RF Tag operation
Processing completed.
Response
Auto communications
Communications
processing
Functions
 Once
Communications with the RF Tag are performed according to queries that are sent from the host
device.
When the Reader/Writer has completed communicating with the RF Tag, it sends a response to the
host device and then waits for another query.
If there is no RF Tag in the communications field when the Reader/Writer receives a query from the
host device, the Reader/Writer returns an RF Tag missing error (error code: 2001 hex). Use a sensor
or other means to confirm the presence of an RF Tag before sending the query.
Section 6 Functions
 Auto
The Reader/Writer automatically detects an RF Tag and communicates with it.
After the host device sends the query, the Reader/Writer automatically detects an RF Tag that enters
the communications field and communicates with it.
 FIFO Trigger
94
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Section 6
Functions
After communicating with an RF Tag, access to that RF Tag is prohibited. The Reader/Writer sends a
response to the host device and then waits for another query.
The Reader/Writer communicates in turn with each of the RF
Tags that enters the communications field. If two RF Tags
enter the communications field at the same time, a collision
occurs, resulting in an RF Tag communications error.
RF Tag
Reader/Writer
Host deviceReader/Writer
Host device
Reader/Writer
RF Tag operation
FIFO Trigger communications cannot be used for communicating with V680-D1KP RF Tags.
Reader/Writer
RF Tag
FIFO trigger
communications
Communications
processing
RF Tag
Response
Indicates that access is prohibited.
Processing completed.
Section 6 Functions
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Section 6
Host deviceReader/Writer
Host device
Reader/Writer
Reader/Writer
RF Tag
RF Tag operation
FIFO Trigger communications
Communications processing
Processing completed.
Response
RF Tag A
132132
RF Tag B
1: RF tag detection processing
2: Communication processing
3: RF tag operation stop processing
FIFO Trigger communications
Communications processing
Response
Since RF tag B does not exist in the communication
area, communication processing with RF tag B is
never executed.
After RF tag B is detected, communication
processing with RF tag B is executed.
Host device
Reader/Writer
Host device
Reader/Writer
Reader/Writer
RF Tag
RF Tag operation
Communications processing
Processing completed.
RF Tag A
132
RF Tag B
1: RF tag detection processing
2: Communication processing
3: RF tag operation stop processing
FIFO Trigger communications
Response
Communications processing
132
FIFO Trigger communications
Response
FIFO Trigger (With ID code check)
Even if the next RF tag B enters the communication
area during communication processing with the RF
tag A, it will not read / write to the next RF tag B.
After RF tag B is detected, communication
processing with RF tag B is executed.
Functions
The FIFO Trigger detects the RF tag in the sequence of “RF tag detection processing” and executes
read / write with the RF tag detected in the sequence of “communication processing”.
<Without ID code check>
When using FIFO Trigger (Without ID code check), please do not put the next RF tag B in the
communication area until communication with the detected RF tag is completed. (See the figure below) *
Section 6 Functions
* When using FIFO Trigger (Without ID code check), the ID code of the RF tag is not checked. Therefore communication time will
be shorter than FIFO Trigger (With ID code check). However, if the next RF tag enters the communication area during
“communication processing” with the detected RF tag, there is a possibility of reading / writing the next RF tag.
<With ID code check>
Communication with RF tag is executed “With ID code check”. Compared with “Without ID code check”,
communication time will be longer.
Even if the next RF tag B enters the communication area during communication processing with the RF
tag A, it will not read / write to the next RF tag B.
* When using FIFO Trigger (With ID code check), the ID code of the RF tag is checked. Even if the next RF tag enters the
communication area during “communication processing” with the detected RF tag, there is no possibility of reading / writing the
next RF tag. However, compared with “Without ID code check”, communication time will be longer.
“ID code” is a unique ID previously stored in each RF tag. By performing ID code check, even if an RF tag with another
ID code enters the communication area during communication processing, it does not communicate with that RF tag.
96
Refer to RF Tag Communications Time (for Reference Only) in Section 11 Appendices for details of Communications Time.
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(Modbus TCP)
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Section 6
2 words (4 bytes)
Overwrite count control area
Always 00 hex
Lower digit
Middle digit
Upper digit
Functions
 Normal RF Tag Communications
Communications with the RF Tag are performed by using the queries that are listed in the following
table.
NameDescriptionPage
READ DATAReads data from an RF Tag.p.160
WRITE DATAWrites data to the memory of the RF Tag.p.161
READ IDReads the RF Tag’s ID code.p.162
DATA FILLWrites the specified data to the specified number of words beginning from the specified start
address. The specifications are made in the query.
LOCKLocks the specified memory block in the RF Tag. It will no longer be possible to write data to the
locked memory block. The lock cannot be released.
DATA COPYReads data from the memory of an RF Tag using one Reader/Writer (A) and writes it to the
memory of the RF Tag in the communications field of another Reader/Writer (B).
 Tag Memory Management
 RF TAG OVERWRITE COUNT CONTROL Query
This query can be used to determine whether the RF Tag overwrite limit has been exceeded.
• With the RF TAG OVERWRITE COUNT CONTROL query with a subtraction specification, the
overwrite count is subtracted from the data in the user-specified overwrite count control area to
determine whether the number of overwrites has been exceeded.
• With the RF TAG OVERWRITE COUNT CONTROL query with an addition specification, the
overwrite count is added to the data in the user-specified overwrite count control area to determine
whether the number of overwrites has exceeded 100,000.
• The RF TAG OVERWRITE COUNT CONTROL query with an addition specification is designed for
use with an RF Tag write life of 100,000. The overwrite count control area must be set so that it is all
within one block.
p.165
p.166
p.163
Section 6 Functions
RF TAG OVERWRITE COUNT CONTROL Query with a Subtraction Specification
The overwrite count control area consists of 4 bytes from the specified start address. The decrement
value is subtracted from the overwrite count and then written to this area. When the value reaches 0
(i.e., 00 hex), a warning code is returned. Therefore, to enable control of the number of overwrites,
the maximum number of overwrites must be written to the overwrite count control area beforehand.
You can set any number of overwrites up to 16,700,000.
You can read the overwrite count control area with a read query. If the control area data is already 0,
the control area value will not be refreshed, and a warning code will be returned as a response.
When the refresh count is set to 0000 hex, the count will not be updated, and only an overwrite count
check will be performed.
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Section 6
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RF TAG OVERWRITE COUNT CONTROL Query with an Addition Specification
The overwrite count control area consists of 4 bytes from the specified start address. The increment
value is added to the overwrite count and then written to this area. When the value reaches 100,000
(i.e., 0186A0 hex), a warning code is returned. You can read the overwrite count control area with a
read query. If the control area data is already 100,000, the control area value will not be refreshed,
and a warning code will be returned as a response. When the refresh count is set to 0000 hex, the
count will not be updated, and only an overwrite count check will be performed.
Section 6 Functions
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RFID System
User's Manual
(Modbus TCP)
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