Mitsubishi Electric MELSEC-I/OLINK, AnyWire DB A20 User Manual

Transition from MELSEC-I/OLINK to

Feb. 2017 Edition

AnyWire DB A20 Handbook

SAFETY PRECAUTIONS

WARNING

CAUTION

Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.

Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.

(Read these precautions before using this product.)

Before using products introduced in this handbook, please read relevant manuals and replacement
handbooks carefully and pay full attention to safety to handle the product correctly.
The precautions given in this handbook are concerned with products introduced in this handbook only. For
the safety precautions of the programmable controller system, refer to the user's manual for the CPU
module used.

In this handbook, the safety precautions are classified into two levels: " WARNING" and " CAUTION".

Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to

serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.

Make sure that the end users read this handbook and then keep the handbook in a safe place for future
reference.

A - 1

When the QJ51AW12D2 is used

[Design Precautions]

WARNING

● An AnyWire DB A20 system has no control function for ensuring safety.

● When connecting a peripheral with the CPU module or a personal computer with an intelligent

function module to modify data of a running programmable controller, configure an interlock circuit in
the sequence program to ensure that the entire system will always operate safely. For other forms of
control (such as program modification or operating status change) of a running programmable
controller, read the relevant manuals carefully and ensure that the operation is safe before
proceeding. Especially, when a remote programmable controller is controlled by an external device,
immediate action cannot be taken if a problem occurs in the programmable controller due to a
communication failure. To prevent this, configure an interlock circuit in the sequence program, and
determine corrective actions to be taken between the external device and CPU module in case of a
communication failure.

● Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an output signal from the CPU module to each
module. Doing so may cause malfunction of the programmable controller system.

[Design Precautions]

CAUTION

● Although an AnyWire DB A20 system features high noise immunity, keep a distance of 100mm or
more between the transmission cables or I/O cables and the high-voltage cables or power cables.
Failure to do so may cause malfunction.

● Configure safety circuits, such as an emergency stop circuit and interlock circuit, external to the
AnyWire DB A20 system.

A - 2

[Installation Precautions]

WARNING

● Use the programmable controller in an environment that meets the general specifications in the user's

manual for the CPU module used.
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the
product.

● To mount the module, while pressing the module mounting lever located in the lower part of the

module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place.
Incorrect interconnection may cause malfunction, failure, or drop of the module.
When using the programmable controller in an environment of frequent vibrations, fix the module with
a screw.
Tighten the screw within the specified torque range.
Undertightening can cause drop of the screw, short circuit, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

● Shut off the external power supply (all phases) used in the system before mounting or removing a

module.
Failure to do so may result in damage to the product.

● Do not directly touch any conductive parts and electronic components of the module.

Doing so can cause malfunction or failure of the module.

A - 3

[Wiring Precautions]

CAUTION

● Tighten the terminal block screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

● Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.

● A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.

● Incorrect wiring may damage modules and external devices.
Adjust a cable length and a module position to prevent disconnection of a connector type terminal
block or a cable.

● Do not solder stranded wires of a cable when connecting them to the terminal block. Doing so may
cause poor contact.

● The power supply voltage of remote slave modules may be insufficient due to a voltage drop in the
power supply line. Connect an external power supply so that the voltage of remote slave modules is
ensured.

● Do not apply the 24VDC power before wiring the entire AnyWire DB A20 system. If the power is
applied before wiring, normal data transmission is not guaranteed.

● Use 24VDC stabilized power supplies for devices in the AnyWire DB A20 system.

● Do not install the control lines or communication cables together with the main circuit lines or power

cables.
Failure to do so may result in malfunction due to noise.

● Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.

● When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable connected to the terminal block, loosen the terminal screw.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.

A - 4

[Startup and Maintenance Precautions]

WARNING

● Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.

● Shut off the external power supply (all phases) used in the system before cleaning the module or

retightening the terminal screws or module fixing screws.
Failure to do so may result in electric shock.
Undertightening the terminal screws can cause short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

[Startup and Maintenance Precautions]

CAUTION

● Do not disassemble or modify the modules. Doing so may cause failure, malfunction, injury, or a fire.

● Shut off the external power supply (all phases) used in the system before mounting or removing a

module.
Failure to do so may cause the module to fail or malfunction.

● After the first use of the product, do not mount/remove the module to/from the base unit, and the

terminal block to/from the module more than 50 times (IEC 61131-2 compliant) respectively.
Exceeding the limit of 50 times may cause malfunction.

● Before handling the module, touch a grounded metal object to discharge the static electricity from the

human body.
Failure to do so may cause the module to fail or malfunction.

[Disposal Precautions]

CAUTION

● When disposing of this product, treat it as industrial waste.

A - 5

When the LJ51AW12D2 is used

[Design Precautions]

WARNING

● An AnyWire DB A20 system has no control function for ensuring safety.

● When connecting a peripheral with the CPU module or a personal computer with an intelligent

function module to modify data of a running programmable controller, configure an interlock circuit in
the sequence program to ensure that the entire system will always operate safely. For other forms of
control (such as program modification or operating status change) of a running programmable
controller, read the relevant manuals carefully and ensure that the operation is safe before
proceeding. Especially, when a remote programmable controller is controlled by an external device,
immediate action cannot be taken if a problem occurs in the programmable controller due to a
communication failure. To prevent this, configure an interlock circuit in the sequence program, and
determine corrective actions to be taken between the external device and CPU module in case of a
communication failure.

● Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an output signal from the CPU module to each
module. Doing so may cause malfunction of the programmable controller system.

[Design Precautions]

CAUTION

● Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Keep a distance of 100mm or more between them. Failure to do so may result in malfunction due to
noise.

● Configure safety circuits, such as an emergency stop circuit and interlock circuit, external to the
AnyWire DB A20 system.

A - 6

[Installation Precautions]

WARNING

● Shut off the external power supply (all phases) used in the system before mounting or removing the

module.
Failure to do so may result in electric shock or cause the module to fail or malfunction.

[Installation Precautions]

CAUTION

● Use the programmable controller in an environment that meets the general specifications in the Safety

Guidelines provided with the CPU module or head module. Failure to do so may result in electric
shock, fire, malfunction, or damage to or deterioration of the product.

● To interconnect modules, engage the respective connectors and securely lock the module joint levers.

Incorrect interconnection may cause malfunction, failure, or drop of the module.

● Tighten the screws within the specified torque range. Undertightening can cause drop of the screw,

short circuit, or malfunction. Overtightening can damage the screw and/or module, resulting in drop,
short circuit, or malfunction.

● Do not directly touch any conductive parts and electronic components of the module.

Doing so can cause malfunction or failure of the module.

A - 7

[Wiring Precautions]

CAUTION

● Tighten the terminal block screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

● Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.

● A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.

● Incorrect wiring may damage modules and external devices.
Adjust a cable length and a module position to prevent disconnection of a connector type terminal
block or a cable.

● Do not solder stranded wires of a cable when connecting them to the terminal block. Doing so may
cause poor contact.

● The power supply voltage of remote slave modules may be insufficient due to a voltage drop in the
power supply line. Connect an external power supply so that the voltage of remote slave modules is
ensured.

● Do not apply the 24VDC power before wiring the entire AnyWire DB A20 system. If the power is
applied before wiring, normal data transmission is not guaranteed.

● Use 24VDC stabilized power supplies for devices in the AnyWire DB A20 system.

● Do not install the control lines or communication cables together with the main circuit lines or power

cables.
Failure to do so may result in malfunction due to noise.

● Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.

● When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable connected to the terminal block, loosen the terminal screw.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.

A - 8

[Startup and Maintenance Precautions]

WARNING

● Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.

● Shut off the external power supply (all phases) used in the system before cleaning the module or

retightening the terminal block screws. Failure to do so may result in electric shock.

[Startup and Maintenance Precautions]

CAUTION

● Do not disassemble or modify the module.

Doing so may cause failure, malfunction, injury, or a fire.

● Shut off the external power supply (all phases) used in the system before mounting or removing a

module.
Failure to do so may cause the module to fail or malfunction.

● Tighten the terminal block screws within the specified torque range. Undertightening can cause drop

of the component or wire, short circuit, or malfunction. Overtightening can damage the screw and/or
module, resulting in drop, short circuit, or malfunction.

● After the first use of the product (module, display unit, and terminal block), the number of connections/

disconnections is limited to 50 times (in accordance with IEC 61131-2).
Exceeding the limit may cause malfunction.

● Before handling the module, touch a conducting object such as a grounded metal to discharge the

static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.

[Disposal Precautions]

CAUTION

● When disposing of this product, treat it as industrial waste.

A - 9

CONDITIONS OF USE FOR THE PRODUCT

(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;

i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major
or serious accident; and
ii) where the backup and fail-safe function are systematically or automatically provided outside of
the PRODUCT for the case of any problem, fault or failure occurring in the PRODUCT.

(2) The PRODUCT has been designed and manufactured for the purpose of being used in general

industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT
LIMITED TO ANY AND ALL RESPONSIBILITY OR LIABILITY BASED ON CONTRACT,
WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR
LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE OPERATED OR
USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS,
OR WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY
MANUALS, TECHNICAL BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;

• Nuclear Power Plants and any other power plants operated by Power companies, and/or any
other cases in which the public could be affected if any problem or fault occurs in the PRODUCT.

• Railway companies or Public service purposes, and/or any other cases in which establishment of
a special quality assurance system is required by the Purchaser or End User.

• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as
Elevator and Escalator, Incineration and Fuel devices, Vehicles, Manned transportation,
Equipment for Recreation and Amusement, and Safety devices, handling of Nuclear or
Hazardous Materials or Chemicals, Mining and Drilling, and/or other applications where there is a
significant risk of injury to the public or property.

Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the
PRODUCT in one or more of the Prohibited Applications, provided that the usage of the PRODUCT
is limited only for the specific applications agreed to by Mitsubishi and provided further that no
special quality assurance or fail-safe, redundant or other safety features which exceed the general
specifications of the PRODUCTs are required. For details, please contact the Mitsubishi
representative in your region.

A - 10

REVISIONS

* The handbook number is given on the bottom left of the back cover.

Print Date * Handbook Number Revision

Jan. 2013 L(NA)08263ENG-A First edition

May 2015 L(NA)08263ENG-B Change

Chapter 7 to Appendix 1, Appendix1 to Appendix 2

Partial correction

SAFETY PRECAUTIONS, GENERIC TERMS AND ABBREVIATIONS

Feb. 2016 L(NA)08263ENG-C Partial correction

Cover, WARRANTY

Feb. 2017 L(NA)08263ENG-D Addition of modules to be replaced

LJ51AW12D2

Partial correction

SAFETY PRECAUTIONS, GENERIC TERMS AND ABBREVIATIONS, Section

1.3, 2.1, 2.2.1, 3.2, 4.1, 5.1.2, Appendix 2.1

Japanese Handbook Version L08249-D

This handbook confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses.

Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may

occur as a result of using the contents noted in this handbook.

© 2013 MITSUBISHI ELECTRIC CORPORATION

A - 11

CONTENTS

SAFETY PRECAUTIONS ................................................................................................................................A - 1

CONDITIONS OF USE FOR THE PRODUCT ...............................................................................................A - 10

REVISIONS .................................................................................................................................................... A - 11

CONTENTS ...................................................................................................................................................A - 12

GENERIC TERMS AND ABBREVIATIONS ................................................................................................... A - 15

CHAPTER 1 INTRODUCTION 1 - 1 to 1 - 2

1.1 Replacement with AnyWire DB A20 ................................................................................................ 1 - 1

1.2 Precautions for Replacement .......................................................................................................... 1 - 2

1.3 Features of AnyWire DB A20 ........................................................................................................... 1 - 2

CHAPTER 2 PERFORMANCE SPECIFICATIONS COMPARISONS 2 - 1 to 2 - 4

2.1 Performance Specifications Comparison of MELSEC-I/OLINK and AnyWire DB A20 .................... 2 - 1

2.2 Wiring for AnyWire DB A20 ............................................................................................................. 2 - 3

2.2.1 Transmission distance .............................................................................................................. 2 - 3

2.2.2 Terminator connection .............................................................................................................. 2 - 3

2.2.3 Branch of transmission lines (transmission distance: 1km) ...................................................... 2 - 4

CHAPTER 3 FUNCTIONAL COMPARISONS 3 - 1 to 3 - 2

3.1 Functional Comparisons of MELSEC-I/OLINK and AnyWire DB A20 ............................................. 3 - 1

3.2 Master Module Switch Comparisons ............................................................................................... 3 - 2

CHAPTER 4 REPLACING THE MASTER MODULE 4 - 1 to 4 - 2

4.1 List of Alternative Master Module Models ........................................................................................ 4 - 1

CHAPTER 5 PROGRAMS COMPARISONS 5 - 1 to 5 - 6

5.1 I/O Signals ....................................................................................................................................... 5 - 1

5.1.1 MELSEC-I/OLINK ..................................................................................................................... 5 - 1

5.1.2 AnyWire DB A20 ....................................................................................................................... 5 - 3

CHAPTER 6 REPLACING THE I/O MODULES 6 - 1 to 6 - 40

6.1 List of Alternative I/O Module Models .............................................................................................. 6 - 1

6.2 I/O Module Specifications Comparisons .......................................................................................... 6 - 6

6.2.1 Input module specifications comparisons ................................................................................. 6 - 6

6.2.2 Output module specifications .................................................................................................. 6 - 12

6.2.3 I/O module specifications comparisons .................................................................................. 6 - 18

6.3 Applicable Crimping Terminal ........................................................................................................ 6 - 40

A - 12

APPENDICES APPX- 1 to APPX - 3

Appendix 1 External Dimensions .......................................................................................................APPX - 1

Appendix 2 Relevant Manuals ...........................................................................................................APPX - 1

Appendix 2.1 Replacement handbooks .........................................................................................APPX - 1

Appendix 2.2 MELSEC-I/OLINK ....................................................................................................APPX - 2

Appendix 2.3 AnyWire DB A20 .....................................................................................................APPX - 2

A - 13

● For the products shown in handbooks for transition, catalogues, and transition examples, refer to the
manuals for the relevant products and check the detailed specifications, precautions for use, and
restrictions before replacement.
For the products manufactured by Mitsubishi Electric Engineering Co., Ltd., Mitsubishi Electric System
& Service Co., Ltd., and other companies, refer to the catalogue for each product and check the
detailed specifications, precautions for use, and restrictions before use.
The manuals and catalogues for our products, products manufactured by Mitsubishi Electric
Engineering Co., Ltd., and Mitsubishi Electric System & Service Co., Ltd. are shown in Appendix of
each handbook for transition.

● Products shown in this handbook are subject to change without notice.

A - 14

GENERIC TERMS AND ABBREVIATIONS

Unless otherwise specified, this handbook uses the following generic terms and abbreviations.

Generic term/abbreviation Description

Series

A series

AnS series

A/AnS series A generic term for A series and AnS series

QnA series

QnAS series

QnA/QnAS series A generic term for QnA series and QnAS series
A/AnS/QnA/QnAS series A generic term for A series, AnS series, QnA series, and QnAS series
Q series The abbreviation for Mitsubishi Electric MELSEC-Q series programmable controllers
L series The abbreviation for Mitsubishi Electric MELSEC-L series programmable controllers

CPU module type

CPU module

Process CPU A generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU, and Q25PHCPU
Redundant CPU A generic term for the Q12PRHCPU and Q25PRHCPU

Universal model QCPU

LCPU

CPU module model

ACPU A generic term for MELSEC-A series CPU modules
AnSCPU A generic term for MELSEC-AnS series CPU modules

AnNCPU

AnACPU

AnUCPU A generic term for the A2UCPU, A2UCPU-S1, A3UCPU, and A4UCPU
AnUS(H)CPU A generic term for the A2USCPU, A2USCPU-S1, and A2USHCPU-S1
A/AnSCPU A generic term for MELSEC-A series and -AnS series CPU modules
AnN/AnACPU A generic term for the AnNCPU and AnACPU
AnN/AnA/AnSCPU A generic term for the AnNCPU, AnACPU, and AnSCPU
QnACPU A generic term for MELSEC-QnA series CPU modules
QnASCPU A generic term for MELSEC-QnAS series CPU modules
QnA/QnASCPU A generic term for MELSEC-QnA series and -QnAS series CPU modules

A/AnS/QnA/QnASCPU

QCPU A generic term for MELSEC-Q series CPU modules
LCPU A generic term for MELSEC-L series CPU modules

Module model related to AnyWire DB A20

Master module A genetic term for the QJ51AW12D2 and LJ51AW12D2
QJ51AW12D2 The abbreviation for the AnyWire DB A20 master module, QJ51AW12D2
LJ51AW12D2 The abbreviation for the AnyWire DB A20 master module, LJ51AW12D2
AnyWire DB A20 An original transmission system provided by Anywire Corporation

The abbreviation for large types of Mitsubishi Electric MELSEC-A series programmable

controllers
The abbreviation for compact types of Mitsubishi Electric MELSEC-A series

programmable controllers

The abbreviation for large types of Mitsubishi Electric MELSEC-QnA series

programmable controllers
The abbreviation for compact types of Mitsubishi Electric MELSEC-QnA series

programmable controllers

A generic term for A series, AnS series, QnA series, QnAS series, Q series, and L

series CPU modules

A generic term for the Q00U(J)CPU, Q01UCPU, Q02UCPU, Q03UD(E)CPU,

Q03UDVCPU, Q04UD(E)HCPU, Q04UDVCPU, Q06UD(E)HCPU, Q06UDVCPU,

Q10UD(E)HCPU, Q13UD(E)HCPU, Q13UDVCPU, Q20UD(E)HCPU,

Q26UD(E)HCPU, and Q26UDVCPU
A generic term for the L02SCPU, L02SCPU-P, L02CPU, L02CPU-P, L06CPU,

L06CPU-P, L26CPU, L26CPU-P, L26CPU-BT, and L26CPU-PBT

A generic term for the A1NCPU, A1NCPUP21/R21, A1NCPUP21-S3, A2NCPU,

A2NCPU-S1, A2NCPUP21/R21, A2NCPUP21/R21-S1, A2NCPUP21-S3(S4),

A3NCPU, A3NCPUP21/R21, and A3NCPUP21-S3
A generic term for the A2ACPU, A2ACPU-S1, A3ACPU, A2ACPUP21/R21,

A2ACPUP21/R21-S1, and A3ACPUP21/R21

A generic term for MELSEC-A series, -AnS series, -QnA series, and -QnAS series CPU

modules

A - 15

1 INTRODUCTION

Point

1

INTRODUCTION

1

1.1 Replacement with AnyWire DB A20

The MELSEC-Q and L series do not have an MELSEC-I/OLINK master module. Therefore, the
alternatives are the AnyWire DB A20 or the CC-Link/LT. Features for replacement are listed in the
following table.

Replacing MELSEC-I/OLINK with AnyWire DB A20 or CC-Link/LT

: Compatible, ×: Not compatible

Replacement with AnyWire DB A20 Replacement with CC-Link/LT

Item

External power supply

Connection type T-branch system, or tree branch system T-branch system

Connection cable The existing I/OLINK cables can be used. × New cables must be installed.

I/O module type

Programming ×

AnyWire products are not available in some countries. For details, please consult your local Mitsubishi
representative.
This transition handbook explains replacement of the MELSEC-I/OLINK with the AnyWire DB A20.
For replacement with the CC-Link/LT, refer to the following transition handbook.
Transition from MELSEC-I/OLINK to CC-Link/LT Handbook

Compati-

bility

Description

The existing I/OLINK external power supply
can be used.

4, 8, or 16 points
Input module/Output module/I/O combined
module

The master module occupies 32 points.
The I/O module address becomes the
specified device by the FROM/TO instruction.

Compati-

bility

× A power supply adapter is necessary.

2, 4, or 8 points
Input module/Output module/I/O combined
module

XY address of the master module becomes
XY address of the I/O module.
Needless to change address (up to 64 points)

Description

1 - 1

1 INTRODUCTION

1.2 Precautions for Replacement

(1) Before replacing MELSEC-I/OLINK with AnyWire DB A20, refer to the manuals for each

AnyWire DB A20 module, and check the functions, specifications, and how to use the
modules.

(2) After replacing MELSEC-I/OLINK with AnyWire DB A20, check the operation of the entire

system before starting the actual operation.

1.3 Features of AnyWire DB A20

The transmission distance can be selected from 50m/200m/1km/3km using the DIP switch.
Up to 512 remote input points and 512 remote output points can be controlled by one QJ51AW12D2 or
LJ51AW12D2 (in the standard setting).
Disconnections can be detected even when the wiring is branched.

AnyWire DB A20

AnyWire DB A20
terminating unit*

AnyWire DB A20 master module
QJ51AW12D2

or

AnyWire DB A20
remote I/O module (input)*

AnyWire DB A20
remote I/O module (output)*

*: Manufactured by Anywire Corporation

AnyWire DB A20 master module
LJ51AW12D2

1 - 2

2 PERFORMANCE SPECIFICATIONS COMPARISONS

2

PERFORMANCE SPECIFICATIONS

2

COMPARISONS

2.1 Performance Specifications Comparison of MELSEC-I/OLINK and AnyWire DB A20

: Compatible, : Partially changed, ×: Not compatible

Specifications Com-

Item

Max. number of

Per single
master
station

Link scan time
(Transmission cycle time)

Overall distance 200m

Communication speed 38.4kbps 125kHz/31.3kHz/7.8kHz/2kHz

Error control method Parity check Double-check system

Network Topology Bus (T-branch available)

Connection cable

Terminating resistor
(terminator)

External
power
supply to
master
module

Number of occupied I/O
points of master module

Internal current
consumption of master
module

link stations

Max. number of
control I/O
points

Voltage 21.6 to 27.6VDC

Current 0.09A

MELSEC-I/OLINK AnyWire DB A20

16 stations

(1 station 4 points)

(when the same number is used on X

Twisted pair cable (0.75mm

(I/O assignment: Output 16/32/64

128 points

and Y)

Approx. 5.4ms

2

2

Cabtire cable (0.75mm

Not required Required ×

16, 32, 48, or 64 points

points)

0.115A

)

(when the same number is used on X and Y)

2.7ms (for 128 points)

Bus (Multidrop system, T-branch system,

star system, or tree system)

General-purpose 2-/4-wire cable

(VCTF, VCF 0.75 to 1.25mm

),

General-purpose wire (0.75 to 1.25mm

Dedicated flat cable (0.75mm

(When the transmission distance exceeds

200m, use wires with a diameter of 0.9 to

24VDC +15 to -10% (21.6 to 27.6VDC)

Ripple voltage 0.5Vp-p or less

0.5A (When 128 slave modules are connected
and the load current is not included)

(I/O assignment: intelligent 32 points)

QJ51AW12D2: 0.5A

LJ51AW12D2: 0.2A

128 stations

1024 points

125kHz: 50m

31.3kHz: 200m

7.8kHz: 1km
2kHz: 3km

2

1.25mm

.)

32 points

*1

2

),

2

),

2

),

Precautions for replace-

pati-

bility

1kHz is equivalent to 1kbps.

Select the speed based on the
existing overall distance.
1kHz is equivalent to 1kbps.

The error control method is
different, but an error check
function is provided.

Crimping terminals can be
used. However, the
communication lines and
power lines connected to the
master module must be
processed to connect to
terminals.

A terminating resistor is
necessary.

Because the external power
supply current has increased,
the current capacity must be
reviewed.

The program and parameters
must be changed.

Internal current consumption of
5VDC must be recalculated.

ment

2 - 1

2 PERFORMANCE SPECIFICATIONS COMPARISONS

*1 The transmission cycle time of the AnyWire DB A20 master module differs depending on the number of transmission points

setting or the transmission clock. For details, refer to the following table.

Max. number of transmission

points setting

64 points (32 points × 2) 0.42 1.7 6.8 24.8

128 points (64 points × 2) 0.7 2.7 10.9 40.7

256 points (128 points × 2) 1.2 4.8 19.1 72.4

384 points (192 points × 2) 1.7 6.8 27.3 104.2

512 points (256 points × 2) 2.2 8.9 35.5 135.9

640 points (320 points × 2) 2.7 10.9 43.6 167.6

768 points (384 points × 2) 3.2 13.0 51.8 199.4

896 points (448 points × 2) 3.8 15.0 60.0 231.1

1024 points (512 points × 2) 4.3 17.1 68.2 262.9

2048 points (1024 points × 2) 8.4 33.4 133.8 516.8

125kHz 31.3kHz 7.8kHz 2kHz

(50m) (200m) (1km) (3km)

Transmission cycle time (ms)

2 - 2

2 PERFORMANCE SPECIFICATIONS COMPARISONS

Important

Terminating unit

Basic

Connect a terminating unit at the end of a line for one master
module.

Transmission distance 50m (total length)

200m (total length)
1km (total length)
3km (total length)

The setting applies to all the transmission speeds.

2.2 Wiring for AnyWire DB A20

2.2.1 Transmission distance

Item Specifications

Transmission clock

Max. transmission distance
(total length)

Number of connectable modules Up to 128 Up to 128 Up to 128

*1 When setting the transmission clock at 125kHz using the QJ51AW12D2 with a serial number (sixth digit) 5 or earlier, use

the product under the following conditions.

• External power supply voltage range: 21.6VDC to 25.2VDC

• Operating ambient temperature: 0 to 50°C

*2 Up to 64 modules can be connected within 2km.

2.2.2 Terminator connection

To ensure more stable transmission, connect the terminating resistor (AT2 manufactured by Anywire
Corporation) at the end of the transmission line.

*1

125kHz

50m 200m 1km 3km

31.3kHz 7.8kHz 2kHz

Up to 32

*2

2 - 3

2 PERFORMANCE SPECIFICATIONS COMPARISONS

A

B

Basic

Branch line:
200m

Main line: 500m

AnyWire

at the end

Branch line: 300m

Connect one terminating unit at the end of a branch line that is
200m or longer.
Contact us if more than two branch lines are 200m or longer.

Total length

The total length of the transmission distance for the AnyWire DB A20 can be
calculated from A + B. Note that the total length should not exceed the maximum
transmission distance set for the system to branch lines.

Important

2.2.3 Branch of transmission lines (transmission distance: 1km)

2 - 4

3 FUNCTIONAL COMPARISONS

3

FUNCTIONAL COMPARISONS

3

3.1 Functional Comparisons of MELSEC-I/OLINK and AnyWire DB A20

: Compatible, : Partially changed, ×: Not compatible

Item

Remote station
communication

Remote station address

Detection of faulty
station (display)

Notification method
RAS
function

Others

of the error

detection to the

CPU module

Line check

Error check of

disconnected

station enabled/

disabled setting

Specifications Compat-

MELSEC-I/OLINK AnyWire DB A20

Communication with up to 16 slave
stations is possible.

XY address of the master station becomes
the XY address of the remote station
module.

The LED display (ERROR STATION) on
the master station notifies a user of faulty
stations.

When an error is detected, the CPU
module is notified by Fuse blown detection
(M 9000). External output is also
performed from the RUN A/B terminals on
the MELSEC-I/OLINK master module.

Cable disconnection can be checked by
the ON status of the LEDs on the master
station and slave stations.

If there is a station that is not connected,
the error check can be disabled by setting
the ON LINE STATION switch of the
master station to off.

Communication with up to 128 slave
stations is possible.

I/O information is stored in the buffer
memory.
The device that data are read from and
written to the buffer memory by the
FROM/TO instruction will be assigned
to the remote station module address in
the program.

The LED display (ALM) on the master
station notifies a user of faulty stations.

An error is notified by the I/O signal
(Xn4: Disconnection detected) from the
AnyWire DB A20 master module. Note,
however, an external output is not
performed from terminals.

Cable disconnection can be checked by
the ON status of the LEDs on the
master station and slave stations.

The master station is provided with a
function to automatically recognize the
number of occupied points and the set
address of the connected station.

ibility

×

Precautions for

replacement

Program change or different
remote station module line
numbers are required
because the concept of the
addresses is different.

Change of the sequence
program is required because
the notifying device differs. If
an external output is required,
an output signal is necessary.

Though the setting method
differs, a station that is not
connected can be detected.

3 - 1