Mitsubishi Electric melsec q01ucpu User manual

QnUCPU User's Manual
(Function Explanation, Program Fundamentals)
-Q00U(J)CPU
-Q01UCPU
-Q02UCPU
-Q03UDVCPU
-Q03UD(E)CPU
-Q04UDVCPU
-Q04UD(E)HCPU
-Q06UDVCPU
-Q06UD(E)HCPU
-Q10UD(E)HCPU
-Q13UDVCPU
-Q13UD(E)HCPU
-Q20UD(E)HCPU
-Q26UDVCPU
-Q26UD(E)HCPU
-Q50UDEHCPU
-Q100UDEHCPU

1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this 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) The programmable controller stops its operation upon detection of the following status, and the
output status of the system will be as shown below.
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 General Safety Requirements in 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.
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.
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 are turned off All outputs are turned off
All outputs are turned off
All outputs are held or turned off
according to the parameter setting.
Q/L series module AnS/A series module

2
[Design Precautions]
[Design Precautions]
WARNING
●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.
●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, 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, 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.
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.

3
[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 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.
Failure to do so may cause 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.
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.

4
[Wiring Precautions]
[Wiring Precautions]
WARNING
●Shut off the external power supply (all phases) used in the system before installation and 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
●Individually ground the FG and LG terminals of the programmable controller with a ground resistance
of 100or less.
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.
●Securely connect the connector to the module. Failure to do so may cause malfunction.
●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.
●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.

5
[Wiring Precautions]
[Startup and Maintenance Precautions]
[Startup and Maintenance Precautions]
CAUTION
●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.
●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 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 (all phases) used in the system before cleaning the module or
retightening the terminal screws, connector screws, or module fixing screws.
Failure to do so may result in electric shock or cause the module to fail or malfunction.
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.

6
[Startup and Maintenance Precautions]
[Disposal Precautions]
[Transportation Precautions]
CAUTION
●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.
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.
●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 of 50 times may cause malfunction.
●After the first use of the product, do not insert/remove the SD memory card to/from the CPU module
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 of the regulated models, refer to the QCPU User's Manual (Hardware Design,
Maintenance and Inspection).)

7
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.

8
INTRODUCTION
This manual, "QnUCPU User's Manual (Function Explanation, Program Fundamentals)" describes the memory maps,
functions, programs, I/O number assignment, and devices of the Universal model QCPU.
Before using this product, please read this manual and the relevant manuals carefully and develop familiarity with the
functions and performance of the Q series programmable controller to handle the product correctly.
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.
Relevant CPU module
Remark
This manual does not describe the specifications of the power supply modules, base units, extension cables, memory cards,
SD memory cards, extended SRAM cassettes, batteries as well as the lists of error codes, special relay, and special register.
For details, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
For multiple CPU systems, refer to the following.
QCPU User's Manual (Multiple CPU System)
CPU module Model
Universal model QCPU
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, Q26UDVCPU, Q50UDEHCPU,
Q100UDEHCPU

9
Memo

CONTENTS
10
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MANUAL PAGE ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PART 1 PROGRAMMING
CHAPTER 1 BASIC PROCEDURE FOR PROGRAMMING 26
1.1 System Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
1.2 Creating a Project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1.3 Creating a Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
1.3.1 Prior knowledge for creating a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.3.2 How to create a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.4 Converting a Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.5 Writing a Project to the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
1.5.1 Formatting a memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.5.2 Writing to the CPU module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.6 Checking an Operation of the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1.7 Saving a Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
CHAPTER 2 APPLICATION OF PROGRAMMING 35
2.1 Memory and Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2.1.1 Memory configuration and storable data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2.1.2 Parameter-valid drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
2.1.3 Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
2.2 Base Unit Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
2.2.1 Base mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
2.2.2 Base unit assignment setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2.3 I/O Number Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2.3.1 Concept of I/O number assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
2.3.2 Setting I/O numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.3.3 I/O number setting example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
2.3.4 Checking I/O numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
2.4 Scan Time Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
2.4.1 Initial Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
2.4.2 I/O Refresh (Refresh Processing with Input/Output Modules) . . . . . . . . . . . . . . . . . . . . . . . . 66
2.4.3 Program Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
2.4.4 END Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
2.5 Operation Processing in the RUN, STOP, or PAUSE Status . . . . . . . . . . . . . . . . . . . . . . . . . .69
2.6 Operation Processing during Momentary Power Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
2.7 Data Clear Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
2.8 I/O Processing and Response Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
2.8.1 Refresh mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

11
2.8.2 Direct mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
2.9 Interrupt Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
2.10 Settings When Program is Divided. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
2.10.1 Initial execution type program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
2.10.2 Scan execution type program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
2.10.3 Stand-by type program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
2.10.4 Fixed scan execution type program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
2.10.5 Changing the program execution type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
2.11 Boot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
2.12 Programming Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
2.13 Communications with Intelligent Function Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
2.14 Access to the AnS/A Series Special Function Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
PART 2 FUNCTIONS
CHAPTER 3 FUNCTIONS 110
3.1 Function List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
3.2 Constant Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
3.3 Latch Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
3.4 Output Mode at Operating Status Change (STOP to RUN) . . . . . . . . . . . . . . . . . . . . . . . . . .123
3.5 Clock Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
3.6 Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
3.6.1 Remote RUN/STOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
3.6.2 Remote PAUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
3.6.3 Remote RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
3.6.4 Remote latch clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
3.6.5 Relationship between remote operation and RUN/STOP status of the CPU module . . . . . 136
3.7 Q Series-compatible Module Input Response Time Selection (I/O Response Time) . . . . . . .137
3.8 Error Time Output Mode Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
3.9 H/W Error Time PLC Operation Mode Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
3.10 Intelligent Function Module Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
3.11 Monitor Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
3.11.1 Monitor condition setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
3.11.2 Local device monitor/test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
3.11.3 External input/output forced on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
3.11.4 Executional conditioned device test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
3.12 Writing Programs While CPU Module is in RUN Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . .166
3.12.1 Online change (ladder mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
3.12.2 Online change (files) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
3.12.3 Precautions for online change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
3.13 Execution Time Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
3.13.1 Program monitor list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
3.13.2 Interrupt program monitor list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
3.13.3 Scan time measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
3.14 Sampling Trace Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

12
3.15 Debug from Multiple Programming Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
3.15.1 Simultaneous monitoring from multiple programming tools . . . . . . . . . . . . . . . . . . . . . . . . . 188
3.15.2 Online change from multiple programming tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
3.16 Watchdog Timer (WDT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191
3.17 Self-diagnostic Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
3.17.1 LEDs indicating errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
3.17.2 Clearing errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
3.18 Error History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203
3.19 Security Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
3.19.1 Password registration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
3.19.2 File password 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
3.19.3 File access control by security key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
3.19.4 Remote password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
3.20 LED Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219
3.20.1 Methods for turning off the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
3.20.2 LED indication priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
3.21 High-Speed Interrupt Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222
3.21.1 High-speed interrupt program execution function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
3.21.2 High-speed I/O refresh function and high-speed buffer transfer function . . . . . . . . . . . . . . 224
3.21.3 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
3.22 Interrupt from Intelligent Function Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .229
3.23 Serial Communication Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230
3.24 Service Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238
3.24.1 Service processing setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
3.25 Initial Device Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244
3.26 Battery Life-prolonging Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247
3.27 Memory Check Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248
3.28 Program Cache Memory Auto Recovery Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249
3.29 Latch Data Backup to Standard ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
3.30 Writing/Reading Device Data to/from Standard ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
3.31 CPU Module Change Function with Memory Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
3.31.1 Data backup for the CPU module change function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
3.31.2 Restoration for the CPU module change function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
3.32 CPU Module Data Backup/restoration Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273
3.32.1 Backup function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
3.32.2 Restoration function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
3.33 Module Model Name Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294
3.34 Module Error Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295
3.35 Local Device Batch Read Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
3.36 Send Points Extension Function (CC-Link IE Controller Network Module) . . . . . . . . . . . . . .301
3.37 Write-Protect Function for Device Data (from Outside the CPU Module). . . . . . . . . . . . . . . .303
3.37.1 Setting method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
3.37.2 Target devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
3.37.3 Operations and functions that cannot be executed for devices in write-protected range. . . 306
3.37.4 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
3.38 Operation History Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

13
3.38.1 Operation history save function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
3.38.2 Operation history display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
3.38.3 Operation history clear function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
3.38.4 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
3.38.5 List of operation codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
3.39 iQ Sensor Solution Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .330
PART 3 DEVICES, CONSTANTS
CHAPTER 4 DEVICES 332
4.1 Device List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .332
4.2 Internal User Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341
4.2.1 Input (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
4.2.2 Output (Y). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
4.2.3 Internal relay (M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
4.2.4 Latch relay (L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
4.2.5 Annunciator (F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
4.2.6 Edge relay (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
4.2.7 Link relay (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
4.2.8 Link special relay (SB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
4.2.9 Step relay (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
4.2.10 Timer (T). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
4.2.11 Counter (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
4.2.12 Data register (D). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
4.2.13 Link register (W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
4.2.14 Link special register (SW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372
4.3 Internal System Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .373
4.3.1 Function devices (FX, FY, FD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373
4.3.2 Special relay (SM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
4.3.3 Special register (SD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
4.4 Link Direct Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376
4.5 Module Access Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .380
4.5.1 Intelligent function module device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
4.5.2 Cyclic transmission area device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382
4.6 Index Register (Z)/Standard Device Resister (Z) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .383
4.6.1 Index register (Z) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
4.6.2 Standard device register (Z). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385
4.6.3 Switching from the scan execution type to the interrupt/fixed scan execution type program
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386
4.7 File Register (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .388
4.7.1 Storage location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
4.7.2 File register size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
4.7.3 Differences in available accesses by storage memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391
4.7.4 Registration procedure for the file register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391
4.7.5 Specification methods of the file register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395
4.7.6 Precautions for using the file register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396

14
4.8 Extended Data Register (D) and Extended Link Register (W) . . . . . . . . . . . . . . . . . . . . . . . .398
4.9 Nesting (N). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403
4.10 Pointer (P). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .404
4.10.1 Local pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
4.10.2 Common pointer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
4.11 Interrupt Pointer(I). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .408
4.11.1 List of interrupt pointer numbers and interrupt factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
4.12 Other Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .411
4.12.1 SFC block device (BL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
4.12.2 Network No. specification device (J) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
4.12.3 I/O No. specification device (U) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
4.12.4 Macro instruction argument device (VD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
CHAPTER 5 CONSTANTS 413
5.1 Decimal Constant (K) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .413
5.2 Hexadecimal Constant (H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .413
5.3 Real Number (E). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .414
5.4 Character String (" "). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .415
CHAPTER 6 CONVENIENT USAGE OF DEVICES 416
6.1 Global Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .416
6.2 Local Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .418
APPENDICES 428
Appendix 1 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .428
Appendix 1.1 List of parameter numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
Appendix 1.2 PLC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
Appendix 1.2.1 PLC name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
Appendix 1.2.2 PLC system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 436
Appendix 1.2.3 PLC file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438
Appendix 1.2.4 PLC RAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 439
Appendix 1.2.5 Boot file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441
Appendix 1.2.6 Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442
Appendix 1.2.7 SFC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
Appendix 1.2.8 Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444
Appendix 1.2.9 I/O assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Appendix 1.2.10 Multiple CPU setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448
Appendix 1.2.11 Built-in Ethernet port setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
Appendix 1.2.12 Serial communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
Appendix 1.2.13 Acknowledge XY assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
Appendix 1.3 Network Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454
Appendix 1.3.1 CC-Link IE Controller Network setting. . . . . . . . . . . . . . . . . . . . . . . . . 455
Appendix 1.3.2 CC-Link IE Field Network setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456
Appendix 1.3.3 MELSECNET/H setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457
Appendix 1.3.4 Ethernet setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 458

15
Appendix 1.3.5 CC-Link setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
Appendix 1.4 Remote Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
Appendix 2 Functions Added or Changed by Version Upgrade. . . . . . . . . . . . . . . . . . . . . . . . . . . .462
Appendix 3 CPU Module Processing Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .466
Appendix 3.1 Scan time structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466
Appendix 3.2 Time required for each processing included in scan time . . . . . . . . . . . . . . . . . 467
Appendix 3.3 Factors that increase the scan time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476
Appendix 4 Data Used in Sequence Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .486
Appendix 4.1 BIN (Binary Code) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 488
Appendix 4.2 HEX (Hexadecimal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489
Appendix 4.3 BCD (Binary-coded Decimal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490
Appendix 4.4 Real number (Floating-point data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
Appendix 4.5 Character string data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495
Appendix 5 Replacing Basic Model QCPU or Qn(H)CPU with QnUCPU . . . . . . . . . . . . . . . . . . . .496
Appendix 5.1 Replacement precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496
Appendix 5.1.1 Replacing Basic model QCPU with Universal model QCPU . . . . . . . . . . 496
Appendix 5.1.2 Replacing High Performance model QCPU with Universal model QCPU . . 500
Appendix 5.2 Applicable devices and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
Appendix 5.3 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511
Appendix 5.3.1 Instructions not supported in the Universal model QCPU and replacing methods
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511
Appendix 5.3.2 Replacing programs using multiple CPU transmission dedicated instructions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513
Appendix 5.3.3 Program replacement examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . 514
Appendix 5.4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
Appendix 5.4.1 Floating-point operation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 528
Appendix 5.4.2 Error check processing for floating-point data comparison instructions
(excluding High-speed Universal model QCPU) . . . . . . . . . . . . . . . . . . 535
Appendix 5.4.3 Range check processing for index-modified devices . . . . . . . . . . . . . . . 539
Appendix 5.4.4 Device latch function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543
Appendix 5.4.5 File usability setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545
Appendix 5.4.6 Parameter-valid drive and boot file setting . . . . . . . . . . . . . . . . . . . . . . 548
Appendix 5.4.7 External input/output forced on/off function . . . . . . . . . . . . . . . . . . . . . 551
Appendix 5.5 Special Relay and Special Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555
Appendix 5.5.1 Special relay list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555
Appendix 5.5.2 Special register list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 558
Appendix 6 Precautions for Replacing QnUD(E)(H)CPU with QnUDVCPU . . . . . . . . . . . . . . . . . .560
Appendix 6.1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 560
Appendix 7 Precautions for Using GX Works2 and Differences with GX Developer . . . . . . . . . . . .564
Appendix 8 Ways to Use Different Types of the Backup/restoration Function . . . . . . . . . . . . . . . . .565
Appendix 9 Device Point Assignment Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .566
INDEX 568
REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 572
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575

16
MANUALS
To understand the main specifications, functions, and usage of the CPU module, refer to the basic manuals. Read other
manuals as well when using a different type of CPU module and its functions. Order each manual as needed, referring to the
following list.
:Basic manual, :Other CPU module manuals/Use them to utilize functions.
(1) CPU module user's manual
(2) Programming manual
Manual name
<manual number (model code)> Description Manual type
QCPU User's Manual (Hardware Design,
Maintenance and Inspection)
<SH-080483ENG (13JR73)>
Specifications of the hardware (CPU modules, power supply modules,
base units, extension cables, memory cards, SD memory cards,
extended SRAM cassettes, and batteries), system maintenance and
inspection, troubleshooting, and error codes
●
QCPU User's Manual (Multiple CPU System)
<SH-080485ENG (13JR75)>
Information on building multiple CPU systems (system configurations,
I/O numbers, communications between CPU modules, and
communications with I/O modules and intelligent function modules)
●
QnUCPU User's Manual (Communication via Built-in
Ethernet Port)
<SH-080811ENG (13JZ29)>
Detailed description of communication via the built-in Ethernet ports of
the CPU module
QnUDVCPU/LCPU User's Manual (Data Logging
Function)
<SH-080893ENG (13JZ39)>
Detailed description of the data logging function of the CPU module
Manual name
<manual number (model code)> Description Manual type
QCPU/LCPU Programming Manual (Common
Instruction)
<SH-080809ENG (13JW10)>
Detailed description and usage of instructions used in programs ●
MELSEC-Q/L/QnA Programming Manual (SFC)
<SH-080041 (13JF60)>
System configuration, specifications, functions, programming, and
error codes for SFC (MELSAP3) programs
MELSEC-Q/L Programming Manual (MELSAP-L)
<SH-080076 (13JF61)>
System configuration, specifications, functions, programming, and
error codes for SFC (MELSAP-L) programs
MELSEC-Q/L Programming Manual (Structured Text)
<SH-080366E (13JF68)>
System configuration and programming using structured text
language
MELSEC-Q/L/QnA Programming Manual (PID
Control Instructions)
<SH-080040 (13JF59)>
Dedicated instructions for PID control
MELSEC-Q Programming/Structured Programming
Manual (Process Control Instructions)
<SH-080316E (13JF67)>
Dedicated instructions for process control

17
(3) Operating manual
(4) I/O module and intelligent function module manual
Manual name
<manual number (model code)> Description Manual type
GX Works2 Version1 Operating Manual (Common)
<SH-080779ENG (13JU63)>
System configuration, parameter settings, and online operations of GX
Works2, which are common to Simple projects and Structured projects ●
GX Developer Version 8 Operating Manual
<SH-080373E (13JU41)>
Operating methods of GX Developer, such as programming, printing,
monitoring, and debugging
Manual name
<manual number (model code)> Description Manual type
MELSEC-Q CC-Link IE Controller Network Reference
Manual
<SH-080668ENG (13JV16)>
Specifications, procedures and settings before system operation,
parameter setting, programming, and troubleshooting of the CC-Link
IE Controller Network module
MELSEC-Q CC-Link IE Field Network Master/Local
Module User's Manual
<SH-080917ENG (13JZ47)>
Specifications, procedures and settings before system operation,
parameter setting, programming, and troubleshooting of the CC-Link
IE Field Network module
Q Corresponding MELSECNET/H Network System
Reference Manual (PLC to PLC network)
<SH-080049 (13JF92)>
Specifications, procedures and settings before system operation,
parameter setting, programming, and troubleshooting of a
MELSECNET/H network system (PLC to PLC network)
Q Corresponding MELSECNET/H Network System
Reference Manual (Remote I/O network)
<SH-080124 (13JF96)>
Specifications, procedures and settings before system operation,
parameter setting, programming, and troubleshooting of a
MELSECNET/H network system (remote I/O network)
Q Corresponding Ethernet Interface Module User's
Manual (Basic)
<SH-080009 (13JL88)>
Specifications, procedures for data communication with external
devices, line connection (open/close), fixed buffer communication,
random access buffer communication, and troubleshooting of the
Ethernet module
MELSEC-Q/L Ethernet Interface Module User's
Manual (Application)
<SH-080010 (13JL89)>
E-mail function, programmable controller CPU status monitoring
function, communication via CC-Link IE Field Network, CC-Link IE
Controller Network, MELSECNET/H, or MELSECNET/10,
communication using the data link instructions, and file transfer
function (FTP server) of the Ethernet module
MELSEC-Q CC-Link System Master/Local Module
User's Manual
<SH-080394E (13JR64)>
System configuration, performance specifications, functions, handling,
wiring, and troubleshooting of the QJ61BT11N
Q Corresponding Serial Communication Module
User's Manual (Basic)
<SH-080006 (13JL86)>
Overview, system configuration, specifications, procedures before
operation, basic data communication method with external devices,
maintenance and inspection, and troubleshooting for using the serial
communication module
MELSEC-Q/L Serial Communication Module User's
Manual (Application)
<SH-080007 (13JL87)>
Special functions (specifications, usage, and settings) and data
communication method with external devices of the serial
communication module
MELSEC Communication Protocol Reference Manual
<SH-080008 (13JF89)>
Communication method using the MC protocol, which reads/writes
data to/from the CPU module via the serial communication module or
Ethernet module

18
(5) Others
Manual name
<manual number (model code)> Description Manual type
iQ Sensor Solution Reference Manual
<SH-081133ENG (13JV28)>
Operating methods of iQ Sensor Solution, such as programming and
monitoring
CC-Link IE Field Network Basic Reference Manual
<SH-081684ENG (13JX62)>
Specifications, procedures before operation, system configuration,
programming, functions, parameter settings, and troubleshooting of
CC-Link IE Field Network Basic