Mitsubishi Electric MELSEC iQ-F Series User manual

Transition from MELSEC FX3G, FX3U,
FX3UC Series to MELSEC iQ-F Series Handbook

1
SAFETY PRECAUTIONS
(Read these precautions before use.)
Before using this product, please read this manual and the relevant manuals introduced in this manual carefully and pay full
attention to safety in order to handle the product correctly.
This manual classifies the safety precautions into two categories: [ WARNING] and [ CAUTION].
Depending on the circumstances, procedures indicated by [ CAUTION] may also cause severe injury.
It is important to follow all precautions for personal safety.
Store this manual in a safe place so that it can be read whenever necessary. Always forward it to the end user.
[DESIGN PRECAUTIONS]
WARNING
●Make sure to set up the following safety circuits outside the PLC to ensure safe system operation
even during external power supply problems or PLC failure. Otherwise, malfunctions may cause
serious accidents.
- Most importantly, set up the following: an emergency stop circuit, a protection circuit, an interlock
circuit for opposite movements (such as normal vs. reverse rotation), and an interlock circuit (to
prevent damage to the equipment at the upper and lower positioning limits).
- Note that when the CPU module detects an error, such as a watchdog timer error, during self-
diagnosis, all outputs are turned off. Also, when an error that cannot be detected by the CPU
module occurs in an input/output control block, output control may be disabled. External circuits
and mechanisms should be designed to ensure safe machinery operation in such a case.
- Note that the output current of the 24 V DC service power supply varies depending on the model
and the absence/presence of extension modules. If an overload occurs, the voltage automatically
drops, inputs in the PLC are disabled, and all outputs are turned off. External circuits and
mechanisms should be designed to ensure safe machinery operation in such a case.
- Note that when an error occurs in a relay, triac or transistor of an output circuit, the output might
stay on or off. For output signals that may lead to serious accidents, external circuits and
mechanisms should be designed to ensure safe machinery operation in such a case.
●Construct an interlock circuit in the program so that the whole system always operates on the safe
side before executing the control (for data change) of the PLC in operation.
Read the manual thoroughly and ensure complete safety before executing other controls (for program
change, parameter change, forcible output and operation status change) of the PLC in operation.
Otherwise, the machine may be damaged and accidents may occur due to erroneous operations.
●In an output circuit, when a load current exceeding the current rating 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.
●For the operating status of each station after a communication failure of the network, refer to relevant
manuals for the network. Incorrect output or malfunction may result in an accident.
WARNING Indicates that incorrect handling may cause hazardous conditions, resulting in
death or severe injury.
CAUTION Indicates that incorrect handling may cause hazardous conditions, resulting in
minor or moderate injury or property damage.

2
[DESIGN PRECAUTIONS]
[Security Precautions]
[INSTALLATION PRECAUTIONS]
CAUTION
●When an inductive load such as a lamp, heater, or solenoid valve is controlled, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on. Take
proper measures so that the flowing current dose not exceed the value corresponding to the
maximum load specification of the resistance load.
●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 this variation in time.
●Simultaneously turn on and off the power supplies of the CPU module and extension modules.
●If a long-time power failure or an abnormal voltage drop occurs, the PLC stops, and output is turned
off. When the power supply is restored, it will automatically restart (when the RUN/STOP/RESET
switch is on the RUN side).
WARNING
●To maintain the security (confidentiality, integrity, and availability) of the programmable controller and
the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses, and other
cyberattacks from unreliable networks and devices via the network, take appropriate measures such
as firewalls, virtual private networks (VPNs), and antivirus solutions.
WARNING
●Make sure to cut off all phases of the power supply externally before attempting installation or wiring
work. Failure to do so may cause electric shock or damage to the product.
●Use the product within the generic environment specifications described in the User's Manual
(Hardware) for the CPU module to be used.
Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt
air, Cl2, H2S, SO2or NO2), flammable gas, vibration or impacts, or expose it to high temperature,
condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or damage
may occur.

3
[INSTALLATION PRECAUTIONS]
CAUTION
●Do not touch the conductive parts of the product directly. Doing so may cause device failures or
malfunctions.
●When drilling screw holes or wiring, make sure that cutting and wiring debris do not enter the
ventilation slits of the PLC. Failure to do so may cause fire, equipment failures or malfunctions.
●For the product supplied together with a dust proof sheet, the sheet should be affixed to the ventilation
slits before the installation and wiring work to prevent foreign objects such as cutting and wiring
debris.
However, when the installation work is completed, make sure to remove the sheet to provide
adequate ventilation. Failure to do so may cause fire, equipment failures or malfunctions.
●Install the product on a flat surface. If the mounting surface is rough, undue force will be applied to the
PC board, thereby causing nonconformities.
●Install the product securely using a DIN rail or mounting screws.
●Connect the expansion board and expansion adapter securely to their designated connectors. Loose
connections may cause malfunctions.
●Make sure to affix the expansion board with tapping screws.
Tightening torque should follow the specifications in the manual.
If the screws are tightened outside of the specified torque range, poor connections may cause
malfunctions.
●Work carefully when using a screwdriver such as installation of the product. Failure to do so may
cause damage to the product or accidents.
●Connect the extension cables, peripheral device cables, input/output cables and battery connecting
cable securely to their designated connectors. Loose connections may cause malfunctions.
●When using an SD memory card, insert it into the SD memory card slot. Check that it is inserted
completely. Poor contact may cause malfunction.
●Turn off the power to the PLC before attaching or detaching the following devices. Failure to do so
may cause equipment failures or malfunctions.
- Peripheral devices, expansion board, expansion adapter, and connector conversion adapter
- Extension modules, bus conversion module and connector conversion module
- Battery

4
[WIRING PRECAUTIONS]
WARNING
●Make sure to cut off all phases of the power supply externally before attempting installation or wiring
work. Failure to do so may cause electric shock or damage to the product.
●Make sure to attach the terminal cover, provided as an accessory, before turning on the power or
initiating operation after installation or wiring work. Failure to do so may cause electric shock.
●The temperature rating of the cable should be 80or more. It may differ depending on the extension
devices. For details, refer to the user's manual of the extension devices.
●Make sure to wire the screw terminal block in accordance with the following precautions. Failure to do
so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Tighten the screws using a Phillips-head screwdriver No. 2 (shaft diameter 6 mm or less). Make
sure that the screwdriver does not touch the partition part of the terminal block.
●Make sure to properly wire to the terminal block (European type) in accordance with the following
precautions. Failure to do so may cause electric shock, equipment failures, a short-circuit, wire
breakage, malfunctions, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Twist the ends of stranded wires and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected parts are directly
stressed.
●Make sure to properly wire to the spring clamp terminal block in accordance with the following
precautions. Failure to do so may cause electric shock, equipment failures, a short-circuit, wire
breakage, malfunctions, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Twist the ends of stranded wires and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected parts are directly
stressed.

5
[WIRING PRECAUTIONS]
CAUTION
●Do not supply power to the [24+] and [24V] terminals (24 V DC service power supply) on the CPU
module or extension modules. Doing so may cause damage to the product.
●Perform class D grounding (grounding resistance: 100 or less) to the grounding terminal on the
CPU module or extension modules with a wire 2 mm2or thicker.
Do not use common grounding with heavy electrical systems (refer to the User's Manual (Hardware)
for the CPU module to be used).
●Connect the power supply wiring to the dedicated terminals described in this manual. If an AC power
supply is connected to a DC input/output terminal or DC power supply terminal, the PLC will burn out.
●Do not wire vacant terminals externally. Doing so may cause damage to the product.
●Install module so that excessive force will not be applied to terminal blocks, power connectors, I/O
connectors, communication connectors, or communication cables. Failure to do so may result in wire
damage/breakage or PLC failure.
●Make sure to observe the following precautions in order to prevent any damage to the machinery or
accidents due to malfunction of the PLC caused by abnormal data written to the PLC due to the
effects of noise.
- Do not bundle the power line, control line and communication cables together with or lay them
close to the main circuit, high-voltage line, load line or power line. As a guideline, lay the power
line, control line and communication cables at least 100 mm away from the main circuit, high-
voltage line, load line or power line.
- Ground the shield of the shielded wire or shielded cable at one point on the PLC. However, do not
use common grounding with heavy electrical systems.
- Ground the shield of the analog input/output cable in accordance with the manuals of each model.
However, do not use common grounding with heavy electrical systems.

6
[STARTUP AND MAINTENANCE PRECAUTIONS]
[STARTUP AND MAINTENANCE PRECAUTIONS]
WARNING
●Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or
malfunctions.
●Before cleaning or retightening terminals, cut off all phases of the power supply externally. Failure to
do so in the power ON status may cause electric shock.
●Before modifying the program in operation, forcible output, running or stopping the PLC, read through
this manual carefully, and ensure complete safety. An operation error may damage the machinery or
cause accidents.
●Do not change the program in the PLC from two or more peripheral equipment devices at the same
time. (i.e. from an engineering tool and a GOT) Doing so may cause destruction or malfunction of the
PLC program.
●Use the battery for memory backup in conformance to the User's Manual (Hardware) for the CPU
module to be used.
- Use the battery for the specified purpose only.
- Connect the battery correctly.
- Do not charge, disassemble, heat, put in fire, short-circuit, connect reversely, weld, swallow or
burn the battery, or apply excessive forces (vibration, impact, drop, etc.) to the battery.
- Do not store or use the battery at high temperatures or expose to direct sunlight.
- Do not expose to water, bring near fire or touch liquid leakage or other contents directly.
- When replacing the battery, make sure to use our specified product (FX3U-32BL).
- When a battery error occurs ("BAT" LED is lit in red), follow the description in this manual.
Incorrect handling of the battery may cause heat excessive generation, bursting, ignition, liquid
leakage or deformation, and lead to injury, fire or failures and malfunction of facilities and other
equipment.
CAUTION
●Do not disassemble or modify the PLC. Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
●After the first use of the SD memory card, do not insert/remove the memory card more than 500 times.
500 times or more may cause malfunction.
●Turn off the power to the PLC before connecting or disconnecting any extension cable. Failure to do
so may cause equipment failures or malfunctions.
●Turn off the power to the PLC before attaching or detaching the following devices. Failure to do so
may cause equipment failures or malfunctions.
- Peripheral devices, expansion board, expansion adapter, and connector conversion adapter
- Extension modules, bus conversion module and connector conversion module
-Battery
●Do not use the chemicals for cleaning.
●If there is the possibility of touching the PLC inside a control panel in maintenance, make sure to
discharge to avoid the influence of static electricity.
●Since there are risks such as burn injuries, please do not touch the surface of the equipment with bare
hands when it is operating in an environment which exceeds ambient temperature of 50.

7
[OPERATION PRECAUTIONS]
[DISPOSAL PRECAUTIONS]
[TRANSPORTATION PRECAUTIONS]
CAUTION
●Construct an interlock circuit in the program so that the whole system always operates on the safe
side before executing the control (for data change) of the PLC in operation. Read the manual
thoroughly and ensure complete safety before executing other controls (for program change,
parameter change, forcible output and operation status change) of the PLC in operation. Otherwise,
the machine may be damaged and accidents may occur due to erroneous operations.
CAUTION
●Please contact a certified electronic waste disposal company for the environmentally safe recycling
and disposal of your device.
●When disposing of batteries, separate them from other waste according to local regulations. For
details of the Battery Directive in EU countries, refer to the User's Manual (Hardware) for the CPU
module to be used.
CAUTION
●When transporting the PLC with the optional battery, turn on the PLC before shipment, confirm that
the battery mode is set using a parameter and the BAT LED is OFF, and check the battery life. If the
PLC is transported with the BAT LED ON or the battery exhausted, the battery-backed data may be
unstable during transportation.
●The PLC is a precision instrument. During transportation, avoid impacts larger than those specified in
the general specifications of the User's Manual (Hardware) for the CPU module to be used by using
dedicated packaging boxes and shock-absorbing palettes. Failure to do so may cause failures in the
PLC. After transportation, verify operation of the PLC and check for damage of the mounting part, etc.
●When transporting lithium batteries, follow required transportation regulations. For details on the
regulated products, refer to the User's Manual (Hardware) for the CPU module to be used.
●When fumigants that contain halogen materials such as fluorine, chlorine, bromine, and iodine are
used for disinfecting and protecting wooden packaging from insects, they cause malfunction when
entering our products. Please take necessary precautions to ensure that remaining materials from
fumigant do not enter our products, or treat packaging with methods other than fumigation (heat
method). Additionally, disinfect and protect wood from insects before packing products.

8
INTRODUCTION
This Replacement Manual describes CPU module and extension device model selection for replacement from the MELSEC
FX3G/FX3U/FX3UC Series to the MELSEC iQ-F Series.
When replacing from the MELSEC FX3G/FX3U/FX3UC Series to the MELSEC iQ-F Series, some items will be necessary to
consider beforehand such as the replacement procedure, installation location, comparing specifications of the existing module
and the planned replacing module, and how to replace the network. For smooth replacement, please carefully consider
beforehand.
Regarding use of this product
• This product has been manufactured as a general-purpose part for general industries, and has not been designed or
manufactured to be incorporated in a device or system used in purposes related to human life.
• Before using the product for special purposes such as nuclear power, electric power, aerospace, medicine or passenger
movement vehicles, consult Mitsubishi Electric.
• This product has been manufactured under strict quality control. However when installing the product where major
accidents or losses could occur if the product fails, install appropriate backup or failsafe functions in the system.
Note
• If in doubt at any stage during the installation of the product, always consult a professional electrical engineer who is
qualified and trained in the local and national standards. If in doubt about the operation or use, please consult the nearest
Mitsubishi Electric representative.
• Since the examples indicated by this manual, technical bulletin, catalog, etc. are used as a reference, please use it after
confirming the function and safety of the equipment and system. Mitsubishi Electric will accept no responsibility for actual
use of the product based on these illustrative examples.
• This manual content, specification etc. may be changed, without a notice, for improvement.
• The information in this manual has been carefully checked and is believed to be accurate; however, if you notice a doubtful
point, an error, etc., please contact the nearest Mitsubishi Electric representative. When doing so, please provide the
manual number given at the end of this manual.

9
MEMO

10
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
GENERIC TERMS AND ABBREVIATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
CHAPTER 1 Outline 15
1.1 Outline of the MELSEC iQ-F Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Outstanding Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Superior Drive Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Improved Programming Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.2 Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Selection and Replacement of the Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CHAPTER 2 Replacement from FX3G to FX5S 19
2.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Precautions when Replacing Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
CHAPTER 3 Replacement from FX3G to FX5UJ 34
3.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Precautions when Replacing Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
CHAPTER 4 Replacement from FX3U to FX5UJ 49
4.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

11
CONTENTS
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Precautions when Replacing Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
CHAPTER 5 Replacement from FX3U to FX5U 63
5.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
5.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Precautions when Replacing Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
5.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
CHAPTER 6 Replacement from FX3UC to FX5UC 77
6.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Precautions when Replacing Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
APPENDIX 92
Appendix 1 Instruction Replacement List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Appendix 2 Precautions for Instruction Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Appendix 3 Device Replacement List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Appendix 4 Precautions for Device Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Appendix 5 Conversion of the SFC Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Differences in Specifications After Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Operation Method for Replacing Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Precautions when Replacing the Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Precautions when Replacing the Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
INDEX 124
REVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

12
RELEVANT MANUALS
MELSEC iQ-F Series
MELSEC FX3G/FX3U/FX3UC Series
TERMS
Unless otherwise specified, this manual uses the following terms.
Manual name <manual number> Description
MELSEC iQ-F FX5S/FX5UJ/FX5U/FX5UC User's Manual(Hardware)
<SH-082452ENG>
Describes the details of hardware of the FX5 CPU module, including performance
specifications, wiring, installation, and maintenance.
MELSEC iQ-F FX5 User's Manual (Application)
<JY997D55401>
Describes the basic knowledge required for program design, functions of the CPU
module, devices/labels, and parameters.
MELSEC iQ-F FX5 Programming Manual (Program Design)
<JY997D55701>
Describes the specifications of ladder, ST, FBD/LD, and SFC programs, and labels.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard
Functions/Function Blocks)
<JY997D55801>
Describes the specifications of instructions and functions that can be used in
programs.
MELSEC iQ-F FX5 User's Manual (Ethernet Communication)
<JY997D56201>
Describes the Ethernet communication function of the CPU module built-in and the
Ethernet module.
GX Works3 Operating Manual
<SH-081215ENG>
Describes the system configuration, parameter settings, and online operations of GX
Works3.
Transition from MELSEC FX3G, FX3U, FX3UC Series to MELSEC iQ-
F Series Handbook
<JY997D66201> (This manual)
Describes the transition from MELSEC FX3G/FX3U/FX3UC series to MELSEC iQ-F
series.
Manual name <manual number> Description
FX3G Series User's Manual [Hardware Edition]
<JY997D31301>
Describes hardware of FX3G Series, including input/output specifications, wiring,
installation and maintenance.
FX3U Series User's Manual [Hardware Edition]
<JY997D16501>
Describes hardware of FX3U Series, including input/output specifications, wiring,
installation and maintenance.
FX3UC Series User's Manual [Hardware Edition]
<JY997D28701>
Describes hardware of FX3UC Series, including input/output specifications, wiring,
installation and maintenance.
GX Works2 Version 1 Operating Manual (Common)
<SH-080779>
Explains system configuration, parameter settings, and online operations of GX
Works2.
Term s Description
Engineering tool The product name of the software package for the MELSEC programmable controllers
SD memory card An abbreviation for Secure Digital Memory Card. Device that stores data using flash memory.

13
GENERIC TERMS AND ABBREVIATIONS
Unless otherwise specified, this manual uses the following generic terms and abbreviations.
Generic term/abbreviation Description
Analog adapter A generic term for FX5-4AD-ADP, FX5-4DA-ADP, FX5-4AD-PT-ADP, FX5-4AD-TC-ADP, and FX5-4A-ADP
Battery A generic term for FX3U-32BL
Bus conversion module A generic term for bus conversion modules (extension cable type) and bus conversion modules (extension
connector type)
Bus conversion module (extension cable type) A generic term for FX5-CNV-BUS
Bus conversion module (extension connector
type)
A generic term for FX5-CNV-BUSC
Communication adapter A generic term for FX5-232ADP and FX5-485ADP
Communication board A generic term for FX5-232-BD, FX5-485-BD, and FX5-422-BD-GOT
Communication function expansion board A generic term for FX3G-232-BD, FX3G-485-BD, FX3G-485-BD-RJ, FX3G-422-BD, FX3U-232-BD,
FX3U-485-BD, FX3U-422-BD, and FX3U-USB-BD
Connector conversion adapter A generic term for FX5-CNV-BC
Connector conversion module A generic term for connector conversion modules (extension cable type) and connector conversion
modules (extension connector type)
Connector conversion module (extension cable
type)
A generic term for FX5-CNV-IF
Connector conversion module (extension
connector type)
A generic term for FX5-CNV-IFC
Expansion adapter A generic term for adapters for FX5 CPU modules
Expansion board A generic term for boards for FX5S CPU modules, FX5UJ CPU modules, and FX5U CPU modules
Extended extension cable A generic term for FX5-30EC and FX5-65EC
Extension module A generic term for FX5 extension modules, FX3 extension modules, extension modules (extension cable
type), and extension modules (extension connector type)
Extension module (extension cable type) A generic term for input modules (extension cable type), output modules (extension cable type), I/O
modules (extension cable type), powered input/output modules, high-speed pulse input/output modules,
extension power supply modules (extension cable type), connector conversion modules (extension cable
type), intelligent function modules, safety extension modules, and bus conversion modules (extension
cable type)
Extension module (extension connector type) A generic term for input modules (extension connector type), output modules (extension connector type), I/
O modules (extension connector type), extension power supply modules (extension connector type),
connector conversion modules (extension connector type), and bus conversion modules (extension
connector type)
Extension power supply module A generic term for FX5 extension power supply modules and FX3 extension power supply modules
FX3 A generic term for FX3S, FX3G, FX3GC, FX3U, and FX3UC programmable controllers
FX3 extension module A generic term for FX3 extension power supply modules and FX3 intelligent function modules
FX3 extension power supply module A generic term for FX3U-1PSU-5V
FX3 intelligent function module A generic term for FX3U-4AD, FX3U-4DA, FX3U-4LC, FX3U-1PG, FX3U-2HC, FX3U-16CCL-M, FX3U-
64CCL, FX3U-128ASL-M, and FX3U-32DP
FX5 A generic term for FX5S, FX5UJ, FX5U, and FX5UC programmable controllers
FX5 CPU module A generic term for FX5S CPU modules, FX5UJ CPU modules, FX5U CPU modules, and FX5UC CPU
modules
FX5 extension module A generic term for I/O modules, FX5 extension power supply modules, FX5 intelligent function modules,
and FX5 safety extension modules
FX5 extension power supply module A generic term for FX5 extension power supply modules (extension cable type) and FX5 extension power
supply modules (extension connector type)
FX5 extension power supply module (extension
cable type)
A generic term for FX5-1PSU-5V
FX5 extension power supply module (extension
connector type)
A generic term for FX5-C1PS-5V
FX5 intelligent function module A generic term for FX5-4AD, FX5-4DA, FX5-8AD, FX5-4LC, FX5-20PG-P, FX5-20PG-D, FX5-40SSC-G,
FX5-80SSC-G, FX5-40SSC-S, FX5-80SSC-S, FX5-ENET, FX5-ENET/IP, FX5-CCLGN-MS, FX5-CCLIEF,
FX5-CCL-MS, FX5-ASL-M, and FX5-DP-M
FX5 safety extension module A generic term for safety main modules and safety expansion modules

14
*1 Area-specific model
FX5S CPU module A generic term for FX5S-30MR/ES, FX5S-40MR/ES, FX5S-60MR/ES, FX5S-80MR/ES*1, FX5S-30MT/ES,
FX5S-40MT/ES, FX5S-60MT/ES, FX5S-80MT/ES*1, FX5S-30MT/ESS, FX5S-40MT/ESS, FX5S-60MT/
ESS, and FX5S-80MT/ESS*1
FX5U CPU module A generic term for FX5U-32MR/ES, FX5U-32MT/ES, FX5U-32MT/ESS, FX5U-64MR/ES, FX5U-64MT/ES,
FX5U-64MT/ESS, FX5U-80MR/ES, FX5U-80MT/ES, FX5U-80MT/ESS, FX5U-32MR/DS, FX5U-32MT/
DS, FX5U-32MT/DSS, FX5U-64MR/DS, FX5U-64MT/DS, FX5U-64MT/DSS, FX5U-80MR/DS, FX5U-
80MT/DS, and FX5U-80MT/DSS
FX5UC CPU module A generic term for FX5UC-32MT/D, FX5UC-32MT/DSS, FX5UC-64MT/D, FX5UC-64MT/DSS, FX5UC-
96MT/D, FX5UC-96MT/DSS, FX5UC-32MT/DS-TS, FX5UC-32MT/DSS-TS, and FX5UC-32MR/DS-TS
FX5UJ CPU module A generic term for FX5UJ-24MR/ES, FX5UJ-24MT/ES, FX5UJ-24MT/ESS, FX5UJ-40MR/ES, FX5UJ-
40MT/ES, FX5UJ-40MT/ESS, FX5UJ-60MR/ES, FX5UJ-60MT/ES, and FX5UJ-60MT/ESS
GOT A generic term for Mitsubishi Electric Graphic Operation Terminal GOT1000 and GOT2000 series
GX Works3 The product name of the software package, SWnDND-GXW3, for the MELSEC programmable controllers
(The 'n' represents a version.)
High-speed pulse input/output module A generic term for FX5-16ET/ES-H and FX5-16ET/ESS-H
I/O module A generic term for input modules, output modules, I/O modules, powered input/output modules, and high-
speed pulse input/output modules
Input module A generic term for input modules (extension cable type) and input modules (extension connector type)
Input module (extension cable type) A generic term for FX5-8EX/ES and FX5-16EX/ES
Input module (extension connector type) A generic term for FX5-C16EX/D, FX5-C16EX/DS, FX5-C32EX/D, FX5-C32EX/DS, and FX5-C32EX/DS-
TS
Input/output module A generic term for input/output modules (extension cable type) and input/output modules (extension
connector type)
Input/output module (extension cable type) A generic term for FX5-16ER/ES, FX5-16ET/ES, and FX5-16ET/ESS
Input/output module (extension connector type) A generic term for FX5-C32ET/D, FX5-C32ET/DSS, FX5-C32ET/DS-TS, and FX5-C32ET/DSS-TS
Intelligent function module A generic term for FX5 intelligent function modules and FX3 intelligent function modules
Intelligent module An abbreviation for intelligent function modules
Output module A generic term for output modules (extension cable type) and output modules (extension connector type)
Output module (extension cable type) A generic term for FX5-8EYR/ES, FX5-8EYT/ES, FX5-8EYT/ESS, FX5-16EYR/ES, FX5-16EYT/ES, and
FX5-16EYT/ESS
Output module (extension connector type) A generic term for FX5-C16EYT/D, FX5-C16EYT/DSS, FX5-C16EYR/D-TS, FX5-C32EYT/D, FX5-
C32EYT/DSS, FX5-C32EYT/D-TS, and FX5-C32EYT/DSS-TS
Peripheral device A generic term for engineering tools and GOTs
Powered input/output module A generic term for FX5-32ER/ES, FX5-32ET/ES, FX5-32ET/ESS, FX5-32ER/DS, FX5-32ET/DS, and FX5-
32ET/DSS
Safety expansion module A generic term for expansion modules to be connected to a safety main module
Safety input expansion module A generic term for FX5-SF-8DI4
Safety main module A generic term for FX5-SF-MU4T5
SD memory card A generic term for NZ1MEM-2GBSD, NZ1MEM-4GBSD, NZ1MEM-8GBSD, NZ1MEM-16GBSD, L1MEM-
2GBSD and L1MEM-4GBSD memory cards
Special communication adapter A generic term for FX3U-232ADP(-MB), FX3U-485ADP(-MB), and FX3U-ENET-ADP
Generic term/abbreviation Description

1 Outline
1.1 Outline of the MELSEC iQ-F Series 15
1
1Outline
1.1 Outline of the MELSEC iQ-F Series
Designed on the concepts of outstanding performance, superior drive control and user centric programming, Mitsubishi
Electric MELSEC-F Series has been reborn as the MELSEC iQ-F Series.
From stand alone use to networked system applications, MELSEC iQ-F Series brings your business to the next level of
industry.
Outstanding Performance
CPU Performance
A new sequence execution engine is at the core of MELSEC iQ-F, capable of running structured programs and multiple
programs, and supports structured text and function blocks, etc.
High-speed System Bus Communication
The MELSEC iQ-F realizes high-speed CPU and high-speed system bus communication. This enables maximum
performance even when using an intelligent function module with large amounts of data.
Security
MELSEC iQ-F has advanced security functions (file password, remote password, security key) to prevent data theft and illegal
operations by unauthorized persons.
Superior Drive Control
Built-in Positioning
The MELSEC iQ-F features positioning functionality with CPU module built-in pulse output*1 and up to 8 axes of high-speed
pulse input/output modules*2. Positioning operations including interrupt, variable speed, and simple interpolation*2 can easily
be set up in tables and executed.
*1 FX5UJ CPU module: Up to 3 axes
FX5S/FX5U/FX5UC CPU module: Up to 4 axes
*2 Only FX5U/FX5UC CPU module is supported.
Simple Motion Module
By connecting the Simple Motion module equipped with positioning function compatible with SSCNET/H, and combining
linear interpolation, 2-axis circular interpolation, and continuous trajectory control in the program set by table method, a
smooth trajectory can be easily drawn.
By starting with parameter settings and the PLC program, the Simple Motion modules can realize a variety of motion control
including positioning control, advanced synchronous control, cam control and speed-torque control.
Predefined protocol support for positioning
Only by simply setting the system configuration, MELSEC iQ-F*1 and IAI ROBO Cylinder can be connected by MODBUS RTU
connection to perform the positioning operation without considering transmission and reception of the communication
command.
*1 Only FX5U/FX5UC CPU module is supported.

16 1 Outline
1.2 Substitute Models
Improved Programming Environment
User-friendly Programming Software (GX Works3)
■System design with a convenient parts library
With GX Works3, designing a system is as easy as preparing the module configuration diagram by dragging and dropping
selected parts.
■Auto-generation of module parameters
When preparing the module configuration diagram, simply double-click the module to automatically generate the module
parameters. A window with an easy-to-use parameter settings screen opens, enabling module parameters to be modified as
needed.
■Main programming languages supported
The main IEC languages are supported by GX Works3. Various different programming languages can be used within the
same project simultaneously, and the labels and devices used in each program can be shared.
1.2 Substitute Models
The recommended substitute models (MELSEC iQ-F Series) introduced in this manual are general substitute models
considered from the number of input/output points, program capacity, product and input/output terminal type (terminal block/
connector etc.). According to usage and service condition, other substitute models different from those described may be
suitable. Also, the recommended substitute models may no longer be appropriate due to factors such as the release of new
products to the market and function improvements.
Please plan replacement to a substitute model with the following procedures.
Procedure to Replace to Substitute Model
1. Investigation of the existing system
List the installed places, number of units, and the type of PLCs. Investigate the programs and wiring diagram etc.
2. Diagnosis of the facilities
Make a diagnosis of the facility’s importance and duration of service, usage environment etc., and set priorities and plan the
replacement procedure.
3. Selection of the models
Select the replacement models according to the number of input/output points and the availability of extension modules etc.
Select from the latest MELSEC iQ-F Series.
4. Reuse of the program
Consider either to reuse the program of the existing system, or create new program.
When reusing, convert and correct the read out program to the new PLC’s format.
5. Replacement of the models
Arrange the selected models and replace on-site.
6. Debug of the system
Test the system after replacement and adjust bugs and timing.
7. Completion
After debugging, migrate to live operation.

1 Outline
1.2 Substitute Models 17
1
Selection and Replacement of the Models
The CPU modules and extension modules of FX3G/FX3U/FX3UC can be replaced by selecting models from the successor
models FX5S/FX5UJ/FX5U/FX5UC that match the system.
Select models according to the following selection table.
Selection table
This selection table describes main performance specifications of the FX5.
For performance specifications, functions and external dimensions not described in the following table, refer to the relevant
part in this manual or the user's manual of each module.
: Supported, : Not supported
Item Required
functions
FX3G FX3U FX3UC FX5S*1 FX5UJ*2 FX5U*3 FX5UC*3 Remarks
Power supply AC power supply      
DC power supply     
Main unit output
type
Relay      
Transistor     
Program
memory capacity
48000 steps or less      Convert the project in GX Works3,
and then check the number of
program steps.
More than 48000
steps
    
Number of input/
output points
(Including
remote I/O)
256 points or less      FX5S/FX5UJ: Using CC-Link IE
Field Basic remote I/O enables a
system configuration with 256 or
more inputs and outputs. For
details, refer to the CC-Link IE
Field Network Basic Reference
Manual.
More than 256
points
    
Clock function       • FX5S/FX5UJ: The clock data is
maintained (for 15 days) with the
internal, large-capacity capacitor
of the CPU module. If the voltage
of the large-capacity capacitor
drops, the clock data will not be
maintained correctly.
• FX5U/FX5UC: The clock data is
maintained (for 10 days) with the
internal, large-capacity capacitor
of the CPU module. When the
optional battery is in use,
operation is continued with the
battery.
The FX5S, FX5UJ, FX5U, and
FX5UC support a time setting
function (an SNTP client). Check
whether this function can be
substituted. For details, refer to
MELSEC iQ-F FX5 User's
Manual (Ethernet Communication).
Extension
module
8 units or less      Extension modules cannot be
connected to the FX5S.
More than 8 units     
Serial
communication
channel
2 channels or less      FX5S/FX5UJ: These products have
a built-in Ethernet port and USB
port. Check whether the required
serial communication function can
be replaced with the built-in
Ethernet or USB interface of the
FX5S/FX5UJ.
More than 2
channels
    
Analog
expansion
adapter
2 units or less      FX5UJ: The intelligent function
module for analog control can be
used. If the number of analog
expansion adapters is insufficient,
check whether the situation can be
handled with an FX5 intelligent
function module.
More than 2 units     

18 1 Outline
1.2 Substitute Models
*1 For details on replacing with the FX5S CPU module, refer to the following.
Page 19 Replacement from FX3G to FX5S
*2 For details on replacing with the FX5UJ CPU module, refer to the following.
Page 34 Replacement from FX3G to FX5UJ
Page 49 Replacement from FX3U to FX5UJ
*3 For details on replacing with the FX5U/FX5UC CPU module, refer to the following.
Page 63 Replacement from FX3U to FX5U
Page 77 Replacement from FX3UC to FX5UC
File registers
(R devices)
With the battery
keep function not in
use
     FX5S/FX5UJ: These products
support an extension file register
function. Check whether this
function can be substituted. For
details, refer to the MELSEC
iQ-F FX5 User's Manual
(Application).
With the battery
keep function in use
    
Item Required
functions
FX3G FX3U FX3UC FX5S*1 FX5UJ*2 FX5U*3 FX5UC*3 Remarks