Mitsubishi Electric MELCEC Q Series User manual

QCPU-A (A Mode)
User's Manual
-Q02CPU-A
-Q02HCPU-A
-Q06HCPU-A

A - 1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using the product, please read this manual and the relevant manuals 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 manual and then keep the manual in a safe place for future
reference.
[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 the following error conditions, it stops the operation
and turn off all the outputs.
• 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.
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 Chapter 9 LOADING AND INSTALLATION in this manual.
(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.
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 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.
When controlling a running programmable controller from a peripheral connected to the CPU module
or from a personal computer connected to a special function module, configure an interlock circuit in
the sequence program to ensure that the entire system will always operate safely.
For program modification and operating status change, read relevant manuals carefully and ensure
the safety before operation.
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.
When setting up the system, do not allow any empty slot on the base unit.
If any slot is left empty, be sure to use a blank cover (A1SG60) or a dummy module (A1SG62) for it.
Otherwise, internal parts of the module may be flied in the short circuit test or when an overcurrent or
overvoltage is accidentally applied to the external I/O section.
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 - 3
[INSTALLATION PRECAUTIONS]
CAUTION
Use the programmable controller under the environment that meets the general specifications in this
manual.
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the
product.
To mount the CPU 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 a drop of the module.
When using the programmable controller in an environment of frequent vibrations, fix the module
with the 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.
Insert securely the module fixing projection at the bottom of the AnS series module into the fixing
hole in the base unit and then tighten the module fixing screw within the specified torque.
When no screw is tightened, even if the module is installed correctly, it may cause malfunctions, a
failure or a drop of the module.
Tightening the screw excessively may damage the screw and/or the module, resulting in a drop of
the module, a short circuit or malfunctions.
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 for incomplete connection after installing it.
Poor electrical contact may cause malfunctions.
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.
Do not directly touch any conductive part of the module.
Doing so can cause malfunction or a failure of the module.

A - 4
[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.

A - 5
[WIRING PRECAUTIONS]
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.
Do not connect multiple power supply modules to one module in parallel.
The power supply modules may be heated, resulting in 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.
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 CPU module to prevent foreign matter, such as wire
chips, from entering during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
Mitsubishi Electric 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 the wiring methods, refer to Section 9.5.)

A - 6
[STARTUP AND MAINTENANCE PRECAUTIONS]
WARNING
Do not touch any terminal while power is on.
Doing so will cause electric shock.
Correctly connect the battery connector.
Do not charge, disassemble, heat, short-circuit, solder, or throw the battery into the fire.
Doing so will cause the battery to produce heat, explode, or ignite, 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.
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.

A - 7
[STARTUP AND MAINTENANCE PRECAUTIONS]
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.
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.
After the first use of the product, do not perform each of the following operations more than 50 times
(IEC 61131-2/JIS B 3502 compliant).
Exceeding the limit may cause malfunction.
• Mounting/removing the module to/from the base unit
• Mounting/removing the terminal block to/from the module
Do not drop or apply any 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.

A - 8
[DISPOSAL PRECAUTIONS]
[TRANSPORTATION PRECAUTIONS]
CAUTION
When disposing of the product, treat it as an 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 Appendix 7.)
CAUTION
When transporting lithium batteries, follow the transportation regulations. (For details of the
regulated models, refer to Appendix 6.)

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 manual number is given on the bottom left of the back cover.
Print Date *Manual Number Revision
Dec., 1999 SH (NA) 080065-A First printing
Mar., 2000 SH (NA) 080065-B
QA1S33B
Dec., 2003 SH (NA) 080065-C
A1SY42P
About Manual, Section 2.2.1, 2.3, 3.1, 4.1.3, 6.1, 6.3, 7.2, 8.1.3, 9.1.2, 9.1.4,
9.1.5, 9.1.6, 9.2, 9.6, 11.3, 11.4.1, Appendix 2.1, 2.3, 4, 5.3
Appendix 6
Appendix 5 List of Instruction Processing Time
Oct., 2006 SH (NA) 080065-D
SAFETY PRECAUTIONS, Section 1.1, 2.2.1, 2.2.3, 2.3, Chapter 3, Section 3.1,
4.1, 4.1.1, 4.1.3, 4.1.4, 4.2.1, 4.2.2, 4.2.3, 4.2.6, 4.3, 4.4.1, 4.5, 4.6.1, 4.6.3, 5.1,
5.2, 6.1.1, 6.2, 7.2.1, 7.3, 7.7, 7.7.1, 7.7.2, Chapter 8, Section 8.1.3, 8.2.4, 8.2.6,
9.1.1, 9.1.2, 9.1.3, 9.1.4, 9.2, 9.2.4, 9.5, 9.5.1, 9.5.2, 10.3, 10.4, 11.2.8, 11.3.2,
11.4.1, Appendix 2.1, 2.3, 4.1, WARRANTY
Section 9.5.1, 9.5.2, 11.2.10
May, 2007 SH (NA) 080065-E
Section 2.3, 8.1.3, 8.2.7, 9.5.1, 9.5.2, 11.4.2
Section 8.1.7
Oct., 2008 SH (NA) 080065-F
SAFETY PRECAUTIONS, Chapter 3, Section 4.2.2, 5.1, 7.2.1, 7.7, 9.5.1, 11.4.1
Appendix 7, 7.1, 7.2
Mar., 2010 SH (NA) 080065-G
"PLC" was changed to "programmable controller".
SAFETY PRECAUTIONS, Section 2.2.1, 2.3, 4.1, 4.2.6, 4.4.3, 4.6.1, 5.1, 7.6,
7.7.2, Chapter 8, Section 9.1.2, 9.2, 9.5.1, 11.3.2, 11.4.1, Appendix 2.1, 2.2, 4.1,
5.1, 6.1, WARRANTY
CONDITIONS OF USE FOR THE PRODUCT
Addition of model
Addition of model
Partial correction
Addition
Delete
Partial correction
Addition
Partial correction
Addition
Partial correction
Addition
Partial correction
Addition

A - 11
The manual number is given on the bottom left of the back cover.
Japanese Manual Version SH-080066-P
1999 MITSUBISHI ELECTRIC CORPORATION
Print Date *Manual Number Revision
Jan., 2011 SH (NA) 080065-H
Section 4.1.4, 8.8, Chapter 9, Section 9.1, 9.1.1, 9.1.2, 9.1.3, 9.1.4, 9.1.5, 9.1.6,
Section 9.1.7, 9.1.8
Oct., 2011 SH (NA) 080065-I
Introduction, Section 2.1, 2.3, 2.4.1, Chapter 3, Section 4.5, 6.1.1, 6.1.2, 6.2,
8.1.1, 9.1.1, 9.1.2, 9.1.3, 9.3, 9.5.1, Chapter 10, Section 11.2.4, 11.2.5, 11.2.6,
11.2.7, 11.2.8, 11.2.9, 11.2.10, Appendix 2.1, 2.2, 5.2, 5.3
Section 6.4
Apr., 2012 SH (NA) 080065-J
USER PRECAUTIONS, Chapter 3, Chapter 7, Section 10.3, 10.4, 11.3.2
Feb., 2015 SH(NA)-080065-K
Chapter 3, Section 4.6.1, 5.1, 5.2, 7.2.1, 7.7.2, 8.1.3, 8.2.6, 9.5.2, Appendix 5.1
Dec., 2015 SH(NA)-080065-L
Section 2.1, 7.4, Appendix 5.3, WARRANTY
Dec., 2017 SH(NA)-080065-M
Section 7.2.1
Jun., 2019 SH(NA)-080065-N
Section 2.1, 2.3, 7.1.1, 11.2.9, Appendix 6.1
This manual confers no industrial property rights or any rights of any other kind, nor dose 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 manual.
Partial correction
Addition
Partial correction
Addition
Partial correction
Partial correction
Partial correction
Partial correction
Partial correction

A - 12
Introduction
Thank you for purchasing the Mitsubishi Electric programmable controller MELSEC-Q series.
Before using your new programmable controller, please read this manual thoroughly to gain an
understanding of its functions so you can use it properly.
When applying the program examples introduced in this manual to the actual system, ensure the
applicability and confirm that it will not cause system control problems.
Please forward a copy of this manual to the end user.
Table of Contents
1 OVERVIEW 1 - 1 to 1 - 2
1.1 Features ........................................................................................................................................1 - 2
2 SYSTEM CONFIGURATION 2 - 1 to 2 - 23
2.1 System Configuration ....................................................................................................................2 - 1
2.2 Precautions When Configuring the System...................................................................................2 - 2
2.2.1 Hardware...............................................................................................................................2 - 2
2.2.2 Software package .................................................................................................................2 - 4
2.2.3 Precautions when using GPP function software packages and A8PUE peripheral devices
which are not compatible with AnU .......................................................................................2 - 7
2.3 System Equipment ........................................................................................................................2 - 8
2.4 System Configuration Overview ..................................................................................................2 - 22
2.4.1 QCPU-A system..................................................................................................................2 - 23
3 SPECIFICATIONS 3 - 1 to 3 - 2
4 CPU MODULE 4 - 1 to 4 - 46
4.1 Performance Specifications...........................................................................................................4 - 1
4.1.1 Overview of operation processing.........................................................................................4 - 4
4.1.2 Operation processing of RUN, STOP, PAUSE, and STEP-RUN ..........................................4 - 7
4.1.3 Operation processing upon instantaneous power failure ......................................................4 - 9
4.1.4 Self-diagnostics functions ...................................................................................................4 - 10
4.1.5 Device list............................................................................................................................4 - 13
4.2 Parameter Setting Ranges ..........................................................................................................4 - 15
4.2.1 List of parameter setting range ...........................................................................................4 - 15
4.2.2 Memory capacity setting (for main program, file register, comment, etc.) ..........................4 - 18
4.2.3 Setting ranges of timer and counter ....................................................................................4 - 22
4.2.4 I/O devices ..........................................................................................................................4 - 24
4.2.5 I/O assignment of special function module .........................................................................4 - 25
4.2.6 MELSECNET/MINI-S3 auto refresh processing .................................................................4 - 26
4.3 Function List ................................................................................................................................4 - 31
4.4 Functions added to QCPU-A.......................................................................................................4 - 33
4.4.1 Boot operation from built-in ROM........................................................................................4 - 33
4.4.2 Usage of 1ms timer .............................................................................................................4 - 36
4.4.3 Sequence accumulation time processing............................................................................4 - 39

A - 13
4.5 Handling Precautions ..................................................................................................................4 - 41
4.6 Part Names and Settings ............................................................................................................4 - 43
4.6.1 Part names..........................................................................................................................4 - 43
4.6.2 Switch operation after program write ..................................................................................4 - 46
4.6.3 Latch clear operation...........................................................................................................4 - 46
4.6.4 Handling of the memory card at power-on ..........................................................................4 - 46
5 POWER SUPPLY MODULE 5 - 1 to 5 - 4
5.1 Specifications ................................................................................................................................5 - 1
5.2 Part Names ...................................................................................................................................5 - 3
6 BASE UNIT AND EXTENSION CABLE 6 - 1 to 6 - 8
6.1 Specifications ................................................................................................................................6 - 1
6.1.1 Base unit specifications.........................................................................................................6 - 1
6.1.2 Extension cables specifications ............................................................................................6 - 2
6.2 Part Names and Settings ..............................................................................................................6 - 3
6.3 Setting the Extension Stage Numbers ..........................................................................................6 - 6
6.4 Voltage drop when an extension base unit is used .......................................................................6 - 7
7 MEMORY CARD AND BATTERY 7 - 1 to 7 - 13
7.1 Memory Card.................................................................................................................................7 - 1
7.1.1 Specifications ........................................................................................................................7 - 1
7.2 Battery Specifications (CPU Module and Memory Card Batteries) ...............................................7 - 2
7.2.1 Specifications ........................................................................................................................7 - 2
7.2.2 Handling precautions ............................................................................................................7 - 3
7.3 Handling Memory Cards................................................................................................................7 - 4
7.4 Part Names of Memory Card.........................................................................................................7 - 5
7.5 Installing/Removing a Memory Card .............................................................................................7 - 6
7.6 Installing Batteries (CPU Module and Memory Card Batteries) ....................................................7 - 7
7.7 Battery Replacement.....................................................................................................................7 - 8
7.7.1 Battery life .............................................................................................................................7 - 9
7.7.2 Battery replacement procedure...........................................................................................7 - 11
8 EMC AND LOW VOLTAGE DIRECTIVES 8 - 1 to 8 - 15
8.1 Requirements for Compliance with EMC Directive .......................................................................8 - 1
8.1.1 EMC Directive related standards ..........................................................................................8 - 2
8.1.2 Installation inside the control panel .......................................................................................8 - 3
8.1.3 Cable.....................................................................................................................................8 - 4
8.1.4 Power supply module............................................................................................................8 - 9
8.1.5 Ferrite core..........................................................................................................................8 - 10
8.1.6 Noise filter (power supply line filter) ....................................................................................8 - 10
8.1.7 Power line for external power supply terminal ....................................................................8 - 11
8.1.8 Installation environment of the CC-Link/LT module and the AS-i module...........................8 - 11
8.2 Requirements for Compliance with Low Voltage Directive..........................................................8 - 12
8.2.1 Standard applied for MELSEC-AnS series programmable controller .................................8 - 12
8.2.2 Precautions when using the MELSEC-AnS series programmable controller......................8 - 12

A - 14
8.2.3 Supply power ......................................................................................................................8 - 13
8.2.4 Control panel.......................................................................................................................8 - 14
8.2.5 Module installation ..............................................................................................................8 - 15
8.2.6 External wiring.....................................................................................................................8 - 15
9 LOADING AND INSTALLATION 9 - 1 to 9 - 30
9.1 Module Installation ........................................................................................................................9 - 1
9.1.1 Handling precautions ............................................................................................................9 - 1
9.1.2 Precautions on base unit installation.....................................................................................9 - 2
9.1.3 Installation and removal of the dustproof cover ....................................................................9 - 5
9.1.4 Installation and removal of modules......................................................................................9 - 7
9.1.5 Extension stage number setting for the extension base unit...............................................9 - 11
9.1.6 Connecting/disconnecting the extension cable ...................................................................9 - 12
9.2 Concept of Fail Safe Circuit.........................................................................................................9 - 15
9.3 Installation Environment ..............................................................................................................9 - 21
9.4 Calculation Method of Heat Amount Generated by the Programmable Controller......................9 - 22
9.5 Wiring ..........................................................................................................................................9 - 24
9.5.1 Wiring precautions ..............................................................................................................9 - 24
9.5.2 Wiring to module terminals..................................................................................................9 - 29
9.6 Precautions when Connecting the Uninterruptible Power Supply (UPS) ....................................9 - 30
10 MAINTENANCE AND INSPECTION 10 - 1 to 10 - 5
10.1 Daily Inspection ...........................................................................................................................10 - 2
10.2 Periodic Inspection ......................................................................................................................10 - 3
10.3 Operating a CPU Module After Being Stored Without a Battery .................................................10 - 4
10.4 Operating a CPU Module After Being Stored Over the Battery Life............................................10 - 5
11 TROUBLESHOOTING 11 - 1 to 11 - 27
11.1 Fundamentals of Troubleshooting...............................................................................................11 - 1
11.2 Troubleshooting...........................................................................................................................11 - 2
11.2.1 Troubleshooting flowchart ...................................................................................................11 - 2
11.2.2 Flow for actions when the POWER LED is turned off .........................................................11 - 3
11.2.3 Flow for actions when the MODE LED turns off..................................................................11 - 4
11.2.4 Flow for actions when the RUN LED is turned off...............................................................11 - 5
11.2.5 Flow for actions when the RUN LED is flashing..................................................................11 - 6
11.2.6 Flow for actions when the ERR. LED is turned on ..............................................................11 - 7
11.2.7 Flow for actions when the ERR. LED is flashing.................................................................11 - 8
11.2.8 Flow for actions when the output module's output load does not turn on ...........................11 - 9
11.2.9 Flow for actions when the program cannot be written.......................................................11 - 10
11.2.10 Flow for actions when the CPU module is not started up ................................................11 - 11
11.3 Error Code List ..........................................................................................................................11 - 12
11.3.1 Procedure to read an error code .......................................................................................11 - 12
11.3.2 Error code list for the QCPU-A (A Mode) ..........................................................................11 - 13
11.4 Fault Examples with I/O Modules..............................................................................................11 - 22
11.4.1 Faults with the input circuit and the corrective actions......................................................11 - 22
11.4.2 Faults in the output circuit .................................................................................................11 - 24

A - 15
APPENDICES Appendix - 1 to Appendix - 61
Appendix 1 Instruction List.............................................................................................................. App - 1
Appendix 1.1 Precautions for write during RUN of a dedicated instruction ............................ App - 14
Appendix 2 Lists of Special Relays and Special Registers .......................................................... App - 15
Appendix 2.1 Special relays................................................................................................... App - 15
Appendix 2.2 Special Registers ............................................................................................. App - 27
Appendix 3 Peripheral Device....................................................................................................... App - 46
Appendix 4 Precautions for Utilizing the Existing Sequence Programs for the QCPU-A.............. App - 48
Appendix 4.1 Instructions with different specifications............................................................ App - 49
Appendix 4.2 Special relays and special registers with different specifications...................... App - 50
Appendix 4.3 Parameter setting.............................................................................................. App - 50
Appendix 4.4 I/O control mode ............................................................................................... App - 51
Appendix 4.5 Microcomputer program.................................................................................... App - 52
Appendix 4.6 Index register processing.................................................................................. App - 53
Appendix 5 External Dimensions .................................................................................................. App - 54
Appendix 5.1 Q02CPU-A, Q02HCPU-A and Q06HCPU-A QCPU-A module ......................... App - 54
Appendix 5.2 A1S61PN, A1S62PN and A1S63P power supply module ................................ App - 55
Appendix 5.3 Base unit ........................................................................................................... App - 56
Appendix 6 Transportation Precautions ........................................................................................ App - 58
Appendix 6.1 Relevant models ............................................................................................... App - 58
Appendix 6.2 Transportation Guidelines................................................................................. App - 59
Appendix 7 Handling of Batteries and Devices with Built-in Batteries in EU Member States ....... App - 60
Appendix 7.1 Disposal precautions......................................................................................... App - 60
Appendix 7.2 Exportation precautions .................................................................................... App - 61
INDEX Index - 1 to Index - 3

A - 16
About This Manual
The following manuals are related to this product.
Related manuals
Manual Name Manual No.
(Model Code)
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ACPU/QCPU-A (A mode) Programming Manual (Common Instructions)
Describes how to use the sequence instruction, basic instructions, applied instructions and
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IB-66250
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Describes instructions that have been expanded.
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AnACPU/AnUCPU/QCPU-A (A mode) Programming Manual (PID Instructions)
Describes dedicated instructions to perform the PID control. (Sold separately)
IB-66258
(13J744)
AnS Module type I/O User's Manual
Describes the specification of the compact building block type I/O module. (Sold separately)
IB-66541
(13JE81)

A - 17
USER PRECAUTIONS
Precautions for using a CPU module
When a CPU module is used for the first time, data in the CPU module (built-in RAM, device
data) and in the memory card are undefined.
Before writing data (parameters, programs) to the CPU module, clear data in the built-in RAM
using a peripheral (PC memory clear operation) and also clear data using the RESET/L.CLR
switch of the CPU module (latch clear operation).
Precautions for battery
(1) Operating a CPU module after being stored without a battery
When a CPU module is operated again after being stored without a battery, data in the
CPU module (built-in RAM, device data) and a memory card may be undefined.
Before operating the CPU module again, clear data in the built-in RAM using a
peripheral (PC memory clear operation) and also clear data using the RESET/L.CLR
switch of the CPU module (latch clear operation).*
After all data are cleared, write the backed-up data in the CPU module or the memory
card.
(2) Operating a CPU module after being stored over the battery life
When a CPU module is operated again after being stored over the battery life, data in
the CPU module (built-in RAM, device data) and a memory card may be undefined.
Before operating the CPU module again, clear data in the built-in RAM using a
peripheral (PC memory clear operation) and also clear data using the RESET/L.CLR
switch of the CPU module (latch clear operation).*
After all data are cleared, write the backed-up data in the CPU module or the memory
card.
* For details of the PC memory clear operation using a peripheral, refer to the following manuals.
GX Developer Operating Manual
A6GPP/A6PHP Operating Manual
SW IVD-GPPA Operating Manual
For the latch clear operation using the RESET/L.CLR switch of the CPU module, refer to Section
4.6.3.
POINT
Make sure to back up each memory contents before storing the programmable
controller.

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1. OVERVIEW
1 OVERVIEW
This user's manual describes the performance, functions, and handling method of the
QCPU-A, as well as the specifications and handling of the memory card, power supply
module and the base unit.
The programming modules and software packages have to be compatible with the
upgraded A2UCPU, A2UCPU-S1, A3UCPU, and A4UCPU (abbreviated as AnUCPU
hereafter).
When the conventional programming modules and software packages are used, the
usable range varies depending on the model of the CPU (programmable controller model
name).(Refer to Section 2.2.3.)
Related to each module used in the CPU modules, check "System equipment list" in
Section 2.3.
Refer to Section 2.2.1 for the special function modules which have limited usable devices
range.
(1) Bundled parts
Product Name Model Quantity
CPU module
Q02CPU-A
1Q02HCPU-A
Q06HCPU-A
Battery Q6BAT 1