Mitsubishi Electric MELSEC-A0J2H Series User manual

Transition from MELSEC-A0J2H Series
to Q Series Handbook
Sep. 2018 Edition

A- 1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this handbook and the relevant manuals introduced in this handbook
carefully and pay full attention to safety to handle the product correctly.
In this manual, 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.
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.

A- 2
[Design Precautions]
WARNING
●Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable
controller. Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) Configure external safety circuits, such as an emergency stop circuit, protection circuit, and
protective interlock circuit for forward/reverse operation or upper/lower limit positioning.
(2) When the programmable controller detects an abnormal condition, it stops the operation and all
outputs are:
All outputs may turn on when an error occurs in the part, such as I/O control part, where the CPU
module cannot detect any error. To ensure safety operation in such a case, provide a safety
mechanism or a fail-safe circuit external to the programmable controller. For a fail-safe circuit
example, refer to the QCPU User's Manual (Hardware Design, Maintenance and Inspection).
(3) Outputs may remain on or off due to a failure of an output module relay or transistor. Configure
an external circuit for monitoring output signals that could cause a serious accident.
●In an output module, when a load current exceeding the rated current or an overcurrent caused by a
load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
●Configure a circuit so that the programmable controller is turned on first and then the external power
supply.
If the external power supply is turned on first, an accident may occur due to an incorrect output or
malfunction.
●For the operating status of each station after a communication failure, refer to relevant manuals for
the network.
Incorrect output or malfunction due to a communication failure may result in an accident.
Q series module
All outputs are turned off
All outputs are held or turned off
according to the parameter setting.
A series module
All outputs are turned off
All outputs are turned off
Overcurrent or overvoltage protection of the power supply
module is activated.
The CPU module detects an error such as a watchdog
timer error by the self-diagnostic function.

A- 3
[Design Precautions]
WARNING
●When changing data of the running programmable controller from a peripheral connected to the
CPU module or from a personal computer connected to an intelligent function module/special
function module, 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, in the case of a control from an external device to a remote programmable controller,
immediate action cannot be taken for a problem on 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.
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.
●When a device such as a lamp, heater, or solenoid valve is controlled through an output module, a
large current (approximately ten times greater than normal) may flow when the output is turned from
off to on.
Take measures such as replacing the module with one having a sufficient current rating.
●After the CPU module is powered on or is reset, the time taken to enter the RUN status varies
depending on the system configuration, parameter settings, and/or program size. Design circuits so
that the entire system will always operate safely, regardless of the time.

A- 4
[Installation Precautions]
CAUTION
●Use the programmable controller in an environment that meets the general specifications in the
QCPU User's Manual (Hardware Design, Maintenance and Inspection).
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 mounting 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.
●When using an extension cable, connect it to the extension cable connector of the base unit securely.
Check the connection for looseness.
Poor contact may cause incorrect input or output.
●When using a memory card, fully insert it into the memory card slot.
Check that it is inserted completely.
Poor contact may cause malfunction.
●When using an SD memory card, fully insert it into the SD memory card slot. Check that it is inserted
completely. Poor contact may cause malfunction.
●Securely insert an extended SRAM cassette into the cassette connector of a CPU module. After
insertion, close the cassette cover to prevent the cassette from coming off. Poor contact may cause
malfunction.
●Shut off the external power supply for the system in all phases before mounting or removing the
module. Failure to do so may result in damage to the product.
A module can be replaced online (while power is on) on any MELSECNET/H remote I/O station or in
the system where a CPU module supporting the online module change function is used.
Note that there are restrictions on the modules that can be replaced online, and each module has its
predetermined replacement procedure.
For details, refer to the relevant sections in the QCPU User's Manual (Hardware Design,
Maintenance and Inspection) and in the manual for the corresponding module.
●Do not directly touch any conductive parts and electronic components of the module, memory card,
SD memory card, or extended SRAM cassette. Doing so can cause malfunction or failure of the
module.
●When using a Motion CPU module and modules designed for motion control, check that the
combinations of these modules are correct before applying power. The modules may be damaged if
the combination is incorrect. For details, refer to the user's manual for the Motion CPU module.

A- 5
[Wiring Precautions]
WARNING
●Shut off the external power supply for the system in all phases before wiring.
Failure to do so may result in electric shock or damage to the product.
●After wiring, attach the included terminal cover to the module before turning it on for operation.
Failure to do so may result in electric shock.
CAUTION
●Ground the FG and LG terminals to the protective ground conductor dedicated to the programmable
controller.
Failure to do so may result in electric shock or malfunction.
●Use applicable solderless terminals and tighten them within the specified torque range. If any spade
solderless terminal is used, it may be disconnected when the terminal screw comes loose, resulting
in failure.
●Check the rated voltage and terminal layout before wiring to the module, and connect the cables
correctly.
Connecting a power supply with a different voltage rating or incorrect wiring may cause a fire or
failure.
●Connectors for external connection must be crimped or pressed with the tool specified by the
manufacturer, or must be correctly soldered.
Incomplete connections could result in short circuit, fire, or malfunction.
●Securely connect the connector to the module. Poor contact may cause malfunction.
●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.
●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.
●Check the interface type and correctly connect the cable. Incorrect wiring (connecting the cable to an
incorrect interface) may cause failure of the module and external device.
●Tighten the terminal screw 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.
●When disconnecting the cable from the module, do not pull the cable by the cable part. For the cable
with connector, hold the connector part of the cable. 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- 6
[Wiring Precautions]
[Startup and Maintenance Precautions]
CAUTION
●Mitsubishi programmable controllers must be installed in control panels.
Connect the main power supply to the power supply module in the control panel through a relay
terminal block.
Wiring and replacement of a power supply module must be performed by maintenance personnel
who is familiar with protection against electric shock. (For wiring methods, refer to the QCPU User's
Manual (Hardware Design, Maintenance and Inspection)).
WARNING
●Do not touch any terminal while power is on.
Doing so will cause electric shock or malfunction.
●Correctly connect the battery connector.
Do not charge, disassemble, heat, short-circuit, solder, or throw the battery into the fire. Also, do not
expose it to liquid or strong shock. Doing so will cause the battery to produce heat, explode, ignite, or
leak, resulting in injury and fire.
●Shut off the external power supply for the system in all phases before cleaning the module or
retightening the terminal screws or module fixing screws.
Failure to do so may result in electric shock.
CAUTION
●Before performing online operations (especially, program modification, forced output, and operation
status change) for the running CPU module from the peripheral connected, read relevant manuals
carefully and ensure the safety.
Improper operation may damage machines or cause accidents.
●Do not disassemble or modify the modules.
Doing so may cause failure, malfunction, injury, or a fire.
●Use any radio communication device such as a cellular phone or PHS (Personal Handy-phone
System) more than 25cm away in all directions from the programmable controller.
Failure to do so may cause malfunction.
●Shut off the external power supply for the system in all phases before mounting or removing the
module. Failure to do so may cause the module to fail or malfunction.
A module can be replaced online (while power is on) on any MELSECNET/H remote I/O station or in
the system where a CPU module supporting the online module change function is used.
Note that there are restrictions on the modules that can be replaced online, and each module has its
predetermined replacement procedure.
For details, refer to the relevant sections in the QCPU User's Manual (Hardware Design,
Maintenance and Inspection) and in the manual for the corresponding module.

A- 7
[Startup and Maintenance Precautions]
[Disposal Precautions]
[Transportation Precautions]
CAUTION
●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, and do not insert/remove the extended SRAM cassette to/from
the CPU module more than 50 times (IEC 61131-2 compliant) respectively. Exceeding the limit may
cause malfunction.
●After the first use of the SD memory card, do not insert/remove the memory card more than 500
times. Exceeding the limit may cause malfunction.
●Do not drop or apply shock to the battery to be installed in the module.
Doing so may damage the battery, causing the battery fluid to leak inside the battery.
If the battery is dropped or any shock is applied to it, dispose of it without using.
●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.
CAUTION
●When disposing of this product, treat it as industrial waste.
When disposing of batteries, separate them from other wastes according to the local regulations.
(For details of the battery directive in EU member states, refer to the QCPU User's Manual
(Hardware Design, Maintenance and Inspection).)
CAUTION
●When transporting lithium batteries, follow the transportation regulations.
For details on the regulated models, refer to the MELSEC-L CPU Module User's Manual (Hardware
Design, Maintenance and Inspection).

A- 8
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- 9
REVISIONS
* The handbook number is given on the bottom left of the back cover.
Japanese Handbook Version L-08056-H
2005 MITSUBISHI ELECTRIC CORPORATION
Print Date * Handbook Number Revision
Dec., 2005 L(NA)-08060ENG-A First edition
Dec., 2007 L(NA)-08060ENG-B Addition of modules to be replaced
QX41Y41P, Renewal tool for A0J2
Addition
Section 1.2, Section 1.4, Section 3.2.3 (4) (6), Section 7.7.7, Appendix 1,
Appendix 2.6
Partial correction
SAFETY PRECAUTIONS, Section 1.1.3 Section 1.3, Section 3.1, Section 3.2,
Section 7.6.2, Section 7.7.1, Section 7.7.7 to 7.7.8 Section 7.7.8 to 7.7.9,
Section 8.1, Section 10.1, Section 11.1, Section 11.2, Appendix 1 Appendix 2
Jul., 2011 L(NA)-08060ENG-C Addition of modules to be replaced
Universal Modul QCPU, Renewal tool for A0J2
Addition
Appendix 1
Partial correction
SAFETY PRECAUTIONS, Section 1, Section 2, Section 3.2, Section 4,
Section 7, Section 8.1, Section 9.1, Section 10.1, Section 10.2.1, Section 10.2.2,
Section 11.1, Appendix 2
Dec., 2015 L(NA)-08060ENG-D Addition
Section 7.1.4, Appendix 1
Partial correction
SAFETY PRECAUTIONS, GENERIC TERMS AND ABBREVIATIONS, Section
1.1.1, 1.1.2, 1.2.1, 1.2.2, 2.1, 2.2, 2.3.1, 2.4.1, 2.4.4, 3.1, 3.2.1, 3.2.2, 3.2.3, 4.1,
4.2, 4.3, 5.1, 5.2, 6.1, 6.2, Chapter 7, Section 7.1.1, 7.1.3, 7.2.1, 7.6.3, 7.7.3,
7.7.6, 8.1, 8.2.1, 8.2.2, 8.3, 8.4, 8.5.1, 8.5.2, 8.6, 8.47, 9.1, 10.1, 10.2.1, 10.2.2,
10.2.3, 11.2, Appendix 2.1, 2.2, 3.1, 3.4, 3.6, WARRANTY
Sep., 2018 L(NA)-08060ENG-E Partial correction
Cover, GENERIC TERMS AND ABBREVIATIONS, Section 1.1.1, 1.3, 1.4,
Chapter 2, Section 3.1, 3.2, 3.3, 4.2, Chapter 6, 7, Section 8.4, 8.5.2, 8.6, 8.7,
Chapter 9, Section 10.2.3, 10.2.4, Appendix 3.4, 3.6
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.

A- 10
SAFETY PRECAUTIONS ................................................................................................................................A - 1
CONDITIONS OF USE FOR THE PRODUCT .................................................................................................A - 8
REVISIONS ......................................................................................................................................................A - 9
CONTENTS ...................................................................................................................................................A - 10
GENERIC TERMS AND ABBREVIATIONS ...................................................................................................A - 14
CHAPTER 1 INTRODUCTION 1 - 1 to 1 - 13
1.1 Proposal to Replace A0J2HCPU with QCPU .................................................................................. 1 - 1
1.1.1 Advantages of replacement to QCPU ....................................................................................... 1 - 1
1.1.2 Proposal of replacement to QCPU (Q00UCPU) ....................................................................... 1 - 2
1.2 Proposal of Replacement with Renewal tool for A0J2 ..................................................................... 1 - 7
1.2.1 Advantages of using renewal tool for A0J2 (manufactured by Mitsubishi Electric System
& Service Co., Ltd.) ................................................................................................................... 1 - 7
1.2.2 Proposal of replacement with renewal tool for A0J2 ............................................................... 1 - 10
1.3 Precautions for Replacement ........................................................................................................ 1 - 13
CHAPTER 2 REPLACING THE CPU MODULE 2 - 1 to 2 - 12
2.1 List of Alternative CPU Module Models ........................................................................................... 2 - 1
2.2 Specifications Comparison of CPU Module .....................................................................................2-3
2.3 Functional Comparisons of CPU Module ......................................................................................... 2 - 6
2.3.1 Functional comparisons between the A0J2HCPU and QCPU ................................................. 2 - 6
2.4 Precautions for Replacement of the CPU Module ........................................................................... 2 - 8
2.4.1 Memory in the CPU module ...................................................................................................... 2 - 8
2.4.2 Keyword registration and password registration ....................................................................... 2 - 9
2.4.3 Write during RUN .................................................................................................................... 2 - 10
2.4.4 I/O assignment ........................................................................................................................ 2 - 11
CHAPTER 3 I/O MODULES REPLACEMENT 3 - 1 to 3 - 63
3.1 Alternative I/O Module Models List .................................................................................................. 3 - 1
3.2 I/O Module Specifications Comparison .......................................................................................... 3 - 12
3.2.1 Input module specifications comparison ................................................................................. 3 - 12
3.2.2 Output module specifications comparison .............................................................................. 3 - 15
3.2.3 I/O Module specifications comparison .................................................................................... 3 - 22
3.3 Precautions for I/O Module Replacement ......................................................................................3-62
CHAPTER 4 REPLACING POWER SUPPLY MODULES 4 - 1 to 4 - 6
4.1 List of Alternative Power Supply Module Models ............................................................................. 4 - 1
CONTENTS

A- 11
4.2 Specifications Comparison of Power Supply Modules .................................................................... 4 - 2
4.3 Precautions for Replacement of the CPU Module ........................................................................... 4 - 6
CHAPTER 5 EXTENSION CABLE REPLACEMENT 5 - 1 to 5 - 1
5.1 List of Alternative Extension Cable Models ..................................................................................... 5 - 1
5.2 Precautions for Extension Cable Replacement ............................................................................... 5 - 1
CHAPTER 6 MEMORY AND BATTERY REPLACEMENT 6 - 1 to 6 - 1
6.1 List of Alternative Memory Models ................................................................................................... 6 - 1
6.2 Precautions for Memory and Battery Replacement ......................................................................... 6 - 1
CHAPTER 7 PROGRAMS REPLACEMENT 7 - 1 to 7 - 39
7.1 Program Replacement Procedures ................................................................................................. 7 - 4
7.1.1 Program conversion procedure from A0J2HCPU to QCPU ..................................................... 7 - 4
7.1.2 Change PLC type ..................................................................................................................... 7 - 6
7.1.3 ACPU program conversion ratio ............................................................................................... 7 - 8
7.1.4 Reading (Reusing) other format files ......................................................................................7-10
7.1.5 How to reuse a program of a PLC type that is not supported by GX Developer .................... 7 - 15
7.2 Instruction Conversion ................................................................................................................... 7 - 18
7.2.1 List of instructions converted from A0J2HCPU to QCPU
(Sequence/Basic/Application instructions) ............................................................................. 7 - 18
7.2.2 Instruction that may need replacement from A0J2HCPU to Basic model QCPU ................... 7 - 24
7.3 Precautions for Parameter Replacement .......................................................................................7-25
7.4 Special Relay Replacement ........................................................................................................... 7 - 26
7.4.1 Replacement of A0J2HCPU with QCPU ................................................................................ 7 - 26
7.5 Special Register Replacement ...................................................................................................... 7 - 27
7.5.1 Replacement of A0J2HCPU with QCPU ................................................................................ 7 - 27
7.6 Precautions for Replacing MELSAP-II with MELSAP3 .................................................................. 7 - 28
7.6.1 How to start the SFC program ................................................................................................ 7 - 28
7.6.2 Block information (Information device for SFC) ...................................................................... 7 - 28
7.6.3 Specifications comparison between MELSAP-II and MELSAP3 ............................................ 7 - 29
7.6.4 SFC diagram that cannot be read normally in another format ................................................ 7 - 30
7.7 Precautions for Program Replacement .......................................................................................... 7 - 31
7.7.1 Applicable devices list ............................................................................................................ 7 - 31
7.7.2 I/O control method .................................................................................................................. 7 - 32
7.7.3 Data formats that can be used by the instructions ................................................................. 7 - 32
7.7.4 Timer ...................................................................................................................................... 7 - 33
7.7.5 Counter ................................................................................................................................... 7 - 34
7.7.6 Display instruction .................................................................................................................. 7 - 34
7.7.7 Instructions with changed specified formats ........................................................................... 7 - 34
7.7.8 Index register .......................................................................................................................... 7 - 36
7.7.9 Setting method when multiple sequence programs are created ............................................ 7 - 37
7.7.10 Precautions for file register replacement ................................................................................7-39
7.7.11 Boot operation method (storing the program to ROM) ........................................................... 7 - 39

A- 12
CHAPTER 8 REPLACING THE COMMUNICATION MODULES 8 - 1 to 8 - 11
8.1 List of Alternative Communication Module Models .......................................................................... 8 - 1
8.2 Specifications Comparison of Communication Modules .................................................................. 8 - 4
8.2.1 Performance comparisons of communication module specifications ....................................... 8 - 4
8.2.2 Cable specifications comparison .............................................................................................. 8 - 5
8.3 Functional Comparisons of Data Modules ....................................................................................... 8 - 6
8.4 Switch Settings Comparisons .......................................................................................................... 8 - 7
8.5 Program Comparisons ..................................................................................................................... 8 - 8
8.5.1 I/O signal ................................................................................................................................... 8 - 8
8.5.2 Buffer memory .......................................................................................................................... 8 - 9
8.6 Program Reuse .............................................................................................................................. 8 - 10
8.7 Other Precautions .......................................................................................................................... 8 - 11
CHAPTER 9 REPLACING THE NETWORK SYSTEM 9 - 1 to 9 - 1
9.1 List of Alternative Network System Models ...................................................................................... 9 - 1
CHAPTER 10 REPLACING THE SPECIAL FUNCTION MODULE 10 - 1 to 10 - 32
10.1 List of Alternative Special Function Module Models ...................................................................... 10 - 1
10.2 Special Function Module Comparison ........................................................................................... 10 - 3
10.2.1 Analog input module comparisons ..........................................................................................10-3
10.2.2 Analog output module comparison ......................................................................................... 10 - 9
10.2.3 High-speed counter module comparison .............................................................................. 10 - 14
10.2.4 Positioning module comparison ............................................................................................ 10 - 21
APPENDICES App - 1 to App - 43
Appendix 1 External Dimensions ..........................................................................................................App - 1
Appendix 2 Performance Specifications Comparison between A0J2H Series and Renewal Tool
for A0J2 .............................................................................................................................App - 1
Appendix 2.1 Precautions for the performance specifications comparison ......................................App - 1
Appendix 2.2 Performance specifications comparison .....................................................................App - 3
Appendix 3 Related Manuals ..............................................................................................................App - 41
Appendix 3.1 Replacement handbooks ..........................................................................................App - 41
Appendix 3.2 A0J2H Series ............................................................................................................App - 42
Appendix 3.3 Q series ....................................................................................................................App - 42
Appendix 3.4 Programming Tool ....................................................................................................App - 43
Appendix 3.5 Products manufactured by Mitsubishi Electric Engineering Co., Ltd. .......................App - 43
Appendix 3.6 Products manufactured by Mitsubishi Electric System & Service Co., Ltd. ..............App - 43

A- 13
●For the products shown in handbooks for transition, Catalogue, and transition examples, refer to the
manuaIs for the reIevant 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 cataIogue 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.
●For details on product compliance with the above standards, please contact your local Mitsubishi
Electric sales office or representative.
●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 An abbreviation for large types of Mitsubishi Electric MELSEC-A series programmable
controllers
AnS series An abbreviation for compact types of Mitsubishi Electric MELSEC-A series programmable
controllers
A/AnS series Generic term for A series and AnS series
A0J2(H) series An abbreviation for Mitsubishi Electric MELSEC-A0J2(H) series programmable controllers
QnA series An abbreviation for large types of Mitsubishi Electric MELSEC-QnA series programmable
controllers
QnAS series An abbreviation for compact types of Mitsubishi Electric MELSEC-QnA series programmable
controllers
QnA/QnAS series Generic term for QnA series and QnAS series
A/AnS/QnA/QnAS series Generic term for A series, AnS series, QnA series, and QnAS series
Q series An abbreviation for Mitsubishi Electric MELSEC-Q series programmable controllers
CPU module type
CPU module Generic term for A series, AnS series, QnA series, QnAS series, and Q series CPU modules
Process CPU Generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU, and Q25PHCPU
Redundant CPU Generic term for the Q12PRHCPU and Q25PRHCPU
Universal model QCPU
Generic term for the Q00UJCPU, Q00UCPU, Q01UCPU, Q02UCPU, Q03UDCPU,
Q03UDVCPU, Q03UDECPU, Q04UDHCPU, Q04UDVCPU, Q04UDEHCPU, Q06UDHCPU,
Q06UDVCPU, Q06UDEHCPU, Q10UDHCPU, Q10UDEHCPU, Q13UDHCPU, Q13UDVCPU,
Q13UDEHCPU, Q20UDHCPU, Q20UDEHCPU, Q26UDHCPU, Q26UDVCPU, and
Q26UDEHCPU
CPU module model
ACPU Generic term for MELSEC-A series programmable controller CPUs
AnSCPU Generic term for MELSEC-AnS series programmable controller CPUs
A/AnSCPU Generic term for MELSEC-A series and MELSEC-AnS series programmable controller CPUs
AnNCPU
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
AnACPU Generic term for the A2ACPU, A2ACPU-S1, A3ACPU, A2ACPUP21/R21, A2ACPUP21/R21-
S1, and A3ACPUP21/R21
AnUCPU Generic term for the A2UCPU, A2UCPU-S1, A3UCPU, A4UCPU, A2USCPU, A2USCPU-S1,
and A2USHCPU-S1
AnN/AnACPU Generic term for the AnNCPU and AnACPU
AnN/AnA/AnSCPU Generic term for the AnNCPU, AnACPU, and AnSCPU
QnACPU Generic term for MELSEC-QnA series programmable controller CPUs
QnASCPU Generic term for MELSEC-QnAS series programmable controller CPUs
QnA/QnASCPU Generic term for MELSEC-QnA series and MELSEC-QnAS series programmable controller
CPUs
A/AnS/QnA/QnASCPU Generic term for A series, AnS series, QnA series, and QnAS series programmable controller
CPUs
QCPU Generic term for MELSEC-Q series programmable controller CPUs

1INTRODUCTION
1- 1
1.1.1 Advantages of replacement to QCPU
(1) Advanced performance of equipment is possible (reduced tact time)
Increased speed of the operation processing and bus realizes several times higher performance than
the A0J2HCPU and significantly improves equipment performance.
(2) Ease of module selection
The building block type allows for flexible system configurations by selecting a module from a wide
range of Q series product lineups.
(3) Ease of programming by various kinds of instructions
PID control instruction, real number operating instruction, there are many convenient instructions
available, i.e. and they allow complex data processing to be performed.
(4) Improved maintainability
(a) The high speed serial port and USB port significantly reduces the read/write time of the program
and, improves factory maintainability.
(b) The flash ROM is adopted as the flash memory of the Universal model QCPU. When the CPU
module is replaced with the Universal model QCPU, the ROM operation (battery-less operation)
can be performed without using an option memory.
1
1 INTRODUCTION
1.1 Proposal to Replace A0J2HCPU with QCPU

1INTRODUCTION
1- 2
1.1.2 Proposal of replacement to QCPU (Q00UCPU)
Remarks
When the A type extension base unit (A65B) is connected, refer to the following.
Transition from MELSEC-A/QnA (Large Type) Series to Q Series Handbook (Fundamentals)
A0J2HCPU QCPU

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(1) Comparison of the installation areas
The following shows a comparison of the installation areas when replacing the A0J2HCPU with the
QCPU.
Select the optimal base unit after taking into consideration the installation space, the number of modules
loaded, etc.
(a) Comparison of the A0J2-E56and the 3-slot main base unit Q33B
(b) Comparison of the A0J2-E56and the 5-slot main base unit Q35B
250
98
190
189
STOP
RUN
RESET
L.CLR
RESET
A 0J2 H CPU
POWE
RUN
MELSEC
A 0J2 H
A 0J A 0J
PULL
POWER
Q62P
QY40QX40Q00UCPU
RUN
ERR
PULL
RS-232
QJ71LP21-25
RUN
T.PASS
SD
ERR.
MNG
D.LINK
RD
L ERR.
250
98
190
245
STOP
RUN
RESET
L.CLR
RESET
A0J2HCPU
POWE
RUN
MELSEC
A0J2H
A0JA0J
PULL
POWER
Q62P
QY40QX40QY40QX40Q00UCPU
RUN
ERR
PULL
RS-232
QJ71LP21-25
RUN
T.PASS
SD
ERR.
MNG
D.LINK
RD
L ERR.
:A0J2H (E56 ) external dimensions
:QCPU external dimensions
(Unit: mm)

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(2) Replacement method without changing the I/O address of the A0J2HCPU
(a) Replacing the A0J2-E56
The A0J2HCPU has I/O points consisting of 32 input points in the first half and 32 output points in the
last half for each I/O module.
When replacing with the building block type, replacement with the same I/O address is possible by
selecting a terminal block module to keep an equivalent wiring method and arranging in the order of
two input modules and two output modules.
(b) Replacing the A0J2-E32, A0J2-E24, and special module
As the input, output, and special modules are 64 point blocks,32 points will become vacant when
replacing with Q series I/O.
When replacing with the building block type, replacement with the same I/O address is possible by
arranging the modules in actual usage mode and setting the head address of each slot using the I/O
assignment of the parameter.
Replacing the A0J2-E56
Power supply
CPU
16 points for
input modules
16 points for
input modules
16 points for
output modules
16 points for
output modules
Empty
Power supply
CPU
16 points for
input modules
16 points for
input modules
32 points for
intelligent module
16 points for
output modules
16 points for
output modules
Replacement of the A0J2-E24
X/Y80 to 9F: Not used
YA0 to BF: Use as actual output
Replacement of special module
X/Y40 to 5F: Use as actual output
X/Y60 to 7F: Not used
Replacing the A0J2-E32
X00 to 1F: Use as actual output
X/Y20 to 3F: Not used