Transition from MELSEC FX3U, FX3UC Series to

MELSEC iQ-F Series Handbook

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.

Indicates that incorrect handling may cause hazardous conditions, resulting in

WARNING death or severe injury.

Indicates that incorrect handling may cause hazardous conditions, resulting in

CAUTION minor or moderate injury or property damage.
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.
● To maintain the safety of the programmable controller system against unauthorized access from
external devices via the network, take appropriate measures. To maintain the safety against
unauthorized access via the Internet, take measures such as installing a firewall.

1
 [DESIGN 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).

[INSTALLATION 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.
● 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, SO2 or 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.

2
[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

3
 [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.

4
[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 Ω or less) to the grounding terminal on the
CPU module or extension modules with a wire 2 mm2 or 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 at one point on the signal receiving side.
However, do not use common grounding with heavy electrical systems.

5
 [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.
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.

[STARTUP AND MAINTENANCE PRECAUTIONS]

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

[OPERATION 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.

6
[DISPOSAL PRECAUTIONS]
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.

[TRANSPORTATION PRECAUTIONS]
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.

7
 INTRODUCTION
This Replacement Manual describes CPU module and extension device model selection for replacement from the MELSEC
FX3U/FX3UC Series to the MELSEC iQ-F Series.
When replacing from the MELSEC 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.

8
MEMO

9
 CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

CHAPTER 1 Outline 16
1.1 Outline of the MELSEC iQ-F Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outstanding Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Superior Drive Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Improved Programming Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.2 Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Selection and Replacement of the Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Replacement of the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

CHAPTER 2 Replacement from FX3U to FX5U 18

2.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

CHAPTER 3 Replacement from FX3UC to FX5UC 25

3.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3 Selection of Substitute Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Recommended Substitute Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Precautions Regarding the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.4 Conversion of the Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.5 Replacement of the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

CHAPTER 4 Conversion of the Projects 33

4.1 Operation Method for Replacing Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2 Precautions when Converting the Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Instruction Replacement List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Precautions for Instruction Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Device Replacement List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Precautions for Device Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.3 Precautions when Replacing the Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.4 Precautions when Replacing Other Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Precautions when Using the High-speed Counters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Precautions when Using the Routine Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10
INDEX 54

REVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

CONTENTS

11
 RELEVANT MANUALS
MELSEC iQ-F Series
Manual name <manual number> Description
MELSEC iQ-F FX5 User's Manual (Startup) Performance specifications, procedures before operation, and
<JY997D58201> troubleshooting of the CPU module.
MELSEC iQ-F FX5U User's Manual (Hardware) Describes the details of hardware of the FX5U CPU module, including input/
<JY997D55301> output specifications, wiring, installation, and maintenance.
MELSEC iQ-F FX5UC User's Manual (Hardware) Describes the details of hardware of the FX5UC CPU module, including
<JY997D61401> input/output specifications, wiring, installation, and maintenance.
MELSEC iQ-F FX5 User's Manual (Application) Describes basic knowledge required for program design, functions of the
<JY997D55401> CPU module, devices/labels, and parameters.
MELSEC iQ-F FX5 Programming Manual (Program Design) Describes specifications of ladders, ST, FBD/LD, and other programs and
<JY997D55701> labels.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/ Describes specifications of instructions and functions that can be used in
Function Blocks) programs.
<JY997D55801>
MELSEC iQ-F FX5 User's Manual (Serial Communication) Describes N:N network, Parallel link, MELSEC Communication protocol,
<JY997D55901> inverter communication, non-protocol communication, and predefined
protocol support.
MELSEC iQ-F FX5 User's Manual (MELSEC Communication Protocol) Explains methods for the device that is communicating with the CPU
<JY997D60801> module by MC protocol to read and write the data of the CPU module.
MELSEC iQ-F FX5 User's Manual (MODBUS Communication) Describes MODBUS serial communication and MODBUS/TCP
<JY997D56101> communication.
MELSEC iQ-F FX5 User's Manual (PROFIBUS) Describes the function of the PROFIBUS-DP master module.
<SH-081910ENG>
MELSEC iQ-F FX5 User's Manual (Ethernet Communication) Describes the Ethernet communication functions of the CPU module built-in
<JY997D56201> and the Ethernet module.
MELSEC iQ-F FX5-ENET User's Manual Describes the functions of the Ethernet module.
<SH-082026ENG>
MELSEC iQ-F FX5 User's Manual (SLMP) Explains methods for the device that is communicating with the CPU
<JY997D56001> module by SLMP to read and write the data of the CPU module.
MELSEC iQ-F FX5 User's Manual (CC-Link IE) Describes CC-Link IE field network module.
<JY997D64201>
MELSEC iQ-F FX5 User's Manual (CC-Link) Describes CC-Link system master/intelligent device module.
<SH-081793ENG>
MELSEC iQ-F FX5 User's Manual (ASLINK) Describes AnyWireASLINK system master module.
<SH-081796ENG>
MELSEC iQ-F FX5 User's Manual (Positioning Control - CPU module built-in, Describes the positioning function of the CPU module built-in and the high-
High-speed pulse input/output module) speed pulse input/output module.
<JY997D56301>
MELSEC iQ-F FX5 User's Manual (Positioning Control - Intelligent function Describes the positioning module.
module)
<SH-081805ENG>
MELSEC iQ-F FX5 Simple Motion Module User's Manual (Startup) Specifications, procedures before operation, system configuration, wiring,
<IB0300251> and operation examples of the Simple Motion module.
MELSEC iQ-F FX5 Simple Motion Module User's Manual (Application) Functions, input/output signals, buffer memories, parameter settings,
<IB0300253> programming, and troubleshooting of the Simple Motion module.
MELSEC iQ-F FX5 Simple Motion Module User's Manual (Advanced Functions and programming for the synchronous control of the Simple
Synchronous Control) Motion module.
<IB0300255>
MELSEC iQ-F FX5 User's Manual (Analog Control - CPU module built-in, Describes the analog function of the CPU module built-in and the analog
Expansion adapter) adapter.
<JY997D60501>
MELSEC iQ-F FX5 User's Manual (Analog Control - Intelligent function module) Describes the analog input module, analog output module, and multiple
<SH-081802ENG> input module.
MELSEC iQ-F FX5 User's Manual (Temperature Control) Describes the temperature control module.
<SH-081799ENG>
GX Works3 Operating Manual System configuration, parameter settings, and online operations of GX
<SH-081215ENG> Works3.

12
Manual name <manual number> Description
Transition from MELSEC FX3U, FX3UC Series to MELSEC iQ-F Series Describes the transition from MELSEC FX3U/FX3UC series to MELSEC iQ-
Handbook F series.
<JY997D66201> (This manual)

MELSEC FX3U/FX3UC Series

Manual name <manual number> Description
FX3U Series User's Manual [Hardware Edition] Describes hardware of FX3U Series, including input/output specifications,
<JY997D16501> wiring, installation and maintenance.
FX3UC Series User's Manual [Hardware Edition] Describes hardware of FX3UC Series, including input/output specifications,
<JY997D28701> wiring, installation and maintenance.
FX2N-CNV-BC User's Guide Describes the connection procedure for system configuration of the FX2N-CNV-
<JY992D66601> BC type connector conversion adapter.
FX3S/FX3G/FX3GC/FX3U/FX3UC Series Programming Manual [Basic & Describes sequence programming for FX3S⋅FX3G⋅FX3GC⋅FX3U⋅FX3UC
Applied Instruction Edition] Series, including explanation for basic instructions, applied instructions and
<JY997D16601> various devices.
MELSEC-Q⋅L⋅F Structured Programming Manual (Fundamentals) Programming methods, specifications, functions, etc. required to create
<SH080782> structured programs.
FX CPU Structured Programming Manual [Device & Common] Devices, parameters, etc. provided in structured projects of GX Works2.
<JY997D26001>
FX CPU Structured Programming Manual [Sequence instruction] Sequence instructions provided in structured projects of GX Works2.
<JY997D34701>
FX CPU Structured Programming Manual [Application Functions] Application functions provided in structured projects of GX Works2.
<JY997D34801>
FX3S/FX3G/FX3GC/FX3U/FX3UC Series User's Manual [Analog Control Describes handling for analog control of the FX3S⋅FX3G⋅FX3GC⋅FX3U⋅FX3UC
Edition] Series.
<JY997D16701>
FX3U-4LC User’s Manual Describes the component names, external dimensions, specifications, and
<JY997D39101> handling of the FX3U-4LC type temperature control module.
FX3U-2HC User’s Manual Describes the component names, external dimensions, specifications, and
<JY997D36701> handling of the FX3U-2HC type high-speed counter module.
FX3S/FX3G/FX3GC/FX3U/FX3UC Series User’s Manual [Positioning Describes handling for positioning control of the
Control] FX3S⋅FX3G⋅FX3GC⋅FX3U⋅FX3UC Series.
<JY997D16801>
FX3U-1PG User’s Manual Describes detailed information regarding the 1-axis pulse output module.
<JY997D47301>
FX3U-20SSC-H User’s Manual Describes the component names, external dimensions, specifications, and
<JY997D21301> handling of the FX3U-20SSC-H type SSCNET positioning control module.
FX Configurator-FP Operation Manual Describes handling and operation of the software for the FX Configurator-FP
<JY997D21801> type positioning module.
FX Series User’s Manual [Data Communication Edition] Describes the device configuration, function description, and program of the N:N
<JY997D16901> network/parallel link/computer link/inverter communication/non-protocol
communication/programming communication.
FX3U-16CCL-M User’s Manual Describes detailed information regarding the CC-Link master module.
<JY997D43601>
FX3U-64CCL User’s Manual Describes detailed information regarding the CC-Link interface module.
<JY997D30401>
FX3U-128ASL-M User’s Manual Describes detailed information regarding the FX3U-128ASL-M type
<JY997D52101> AnyWireASLINK master module.
FX3U-64DP-M User’s Manual Describes detailed information regarding the FX3U-64DP-M type PROFIBUS-
<JY997D19201> DP master module.
FX3U-32DP User’s Manual Describes detailed information regarding the FX3U-32DP type PROFIBUS-DP
<JY997D25201> interface module.
FX3U-ENET User’s Manual Describes detailed information regarding the Ethernet extension module.
<JY997D18101>
FX3U-ENET-ADP User’s Manual Describes detailed information regarding the FX3U-ENET-ADP type Ethernet
<JY997D45801> communication extension adapter.
FX3U-1PSU-5V Installation Manual Describes the specification and handling procedures of the extension power
<JY997D22501> module.
GX Works2 Version 1 Operating Manual (Common) Explains system configuration, parameter settings, and online operations of GX
<SH-080779> Works2.

13
 TERMS
Unless otherwise specified, this manual uses the following terms.
For details on the FX3 devices that can be connected with the FX5, refer to User's Manual (Hardware) of the CPU module to
be used.
Terms Description
■Devices
FX5 Generic term for FX5U and FX5UC PLCs
FX3 Generic term for FX3S, FX3G, FX3GC, FX3U, and FX3UC PLCs
FX5 CPU module Generic term for FX5U CPU module and FX5UC CPU module
FX5U CPU module 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 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, and FX5UC-32MT/DSS-TS
Extension module Generic term for FX5 extension modules and FX3 function modules
• FX5 extension module Generic term for I/O modules, FX5 extension power supply modules, and FX5 intelligent function modules
• FX3 extension module Generic term for FX3 extension power supply module and FX3 intelligent function module
• Extension module (extension cable type) Generic term for Input modules (extension cable type), Output modules (extension cable type), Input/
output modules (extension cable type), Powered input/output module, High-speed pulse input/output
module, Extension power supply module (extension cable type), Connector conversion module (extension
cable type), Intelligent function modules, and Bus conversion module (extension cable type)
• Extension module (extension connector type) Generic term for Input modules (extension connector type), Output modules (extension connector type),
Input/output modules (extension connector type), Extension power supply module (extension connector
type), Connector conversion module (extension connector type), and Bus conversion module (extension
connector type)
I/O module Generic term for Input modules, Output modules, Input/output modules, Powered input/output modules,
and High-speed pulse input/output modules
Input module Generic term for Input modules (extension cable type) and Input modules (extension connector type)
• Input module (extension cable type) Generic term for FX5-8EX/ES and FX5-16EX/ES
• Input module (extension connector type) Generic term for FX5-C16EX/D, FX5-C16EX/DS, FX5-C32EX/D, FX5-C32EX/DS, and FX5-C32EX/DS-
TS
Output module Generic term for Output modules (extension cable type) and Output modules (extension connector type)
• Output module (extension cable type) 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) Generic term for FX5-C16EYT/D, FX5-C16EYT/DSS, FX5-C32EYT/D, FX5-C32EYT/DSS, FX5-C32EYT/
D-TS, and FX5-C32EYT/DSS-TS
Input/output module Generic term for Input/output modules (extension cable type) and Input/output modules (extension
connector type)
• Input/output module (extension cable type) Generic term for FX5-16ER/ES, FX5-16ET/ES, and FX5-16ET/ESS
• Input/output module (extension connector type) Generic term for FX5-C32ET/D, FX5-C32ET/DSS, FX5-C32ET/DS-TS, and FX5-C32ET/DSS-TS
Powered input/output module Generic term for FX5-32ER/ES, FX5-32ET/ES, FX5-32ET/ESS, FX5-32ER/DS, FX5-32ET/DS, and FX5-
32ET/DSS
High-speed pulse input/output module Generic term for FX5-16ET/ES-H and FX5-16ET/ESS-H
Extension power supply module Generic term for FX5 extension power supply module and FX3 extension power supply module
• FX5 extension power supply module Generic term for FX5 extension power supply module (extension cable type) and FX5 extension power
supply module (extension connector type)
• FX5 extension power supply module (extension Different name for FX5-1PSU-5V
cable type)
• FX5 extension power supply module (extension Different name for FX5-C1PS-5V
connector type)
• FX3 extension power supply module Different name for FX3U-1PSU-5V
Intelligent module The abbreviation for intelligent function modules
Intelligent function module Generic term for FX5 intelligent function modules and FX3 intelligent function modules
• FX5 intelligent function module Generic term for FX5-4AD, FX5-4DA, FX5-8AD, FX5-4LC, FX5-20PG-P, FX5-20PG-D, FX5-40SSC-S,
FX5-80SSC-S, FX5-ENET, FX5-CCLIEF, FX5-CCL-MS, FX5-ASL-M, and FX5-DP-M

14
Terms Description
• FX3 intelligent function module Generic term for FX3U-4AD, FX3U-4DA, FX3U-4LC, FX3U-1PG, FX3U-2HC, FX3U-16CCL-M, FX3U-
64CCL, FX3U-128ASL-M, and FX3U-32DP
Expansion board Generic term for board for FX5U CPU module
• Communication board Generic term for FX5-232-BD, FX5-485-BD, and FX5-422-BD-GOT
Expansion adapter Generic term for adapter for FX5 CPU module
• Communication adapter Generic term for FX5-232ADP and FX5-485ADP
• Analog adapter Generic term for FX5-4AD-ADP, FX5-4DA-ADP, FX5-4AD-PT-ADP, and FX5-4AD-TC-ADP
Bus conversion module Generic term for Bus conversion module (extension cable type) and Bus conversion module (extension
connector type)
• Bus conversion module (extension cable type) Different name for FX5-CNV-BUS
• Bus conversion module (extension connector Different name for FX5-CNV-BUSC
type)
Connector conversion module Generic term for Connector conversion module (extension cable type) and Connector conversion module
(extension connector type)
• Connector conversion module (extension cable Different name for FX5-CNV-IF
type)
• Connector conversion module (extension Different name for FX5-CNV-IFC
connector type)
Extended extension cable Generic term for FX5-30EC and FX5-65EC
Connector conversion adapter Different name for FX5-CNV-BC
Battery Different name for FX3U-32BL
SD memory card Generic term for NZ1MEM-2GBSD, NZ1MEM-4GBSD, NZ1MEM-8GBSD, NZ1MEM-16GBSD, L1MEM-
2GBSD and L1MEM-4GBSD SD memory cards
Abbreviation of Secure Digital Memory Card. Device that stores data using flash memory.
Peripheral device Generic term for engineering tools and GOTs
GOT Generic term for Mitsubishi Electric Graphic Operation Terminal GOT1000 and GOT2000 series
■Software packages
Engineering tool The product name of the software package for the MELSEC programmable controllers
GX Works3 The product name of the software package, SWnDND-GXW3, for the MELSEC programmable controllers
(The 'n' represents a version.)

15
 1 Outline

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

MELSEC iQ-F realizes high-speed system bus communication at speeds of 1.5 k words/ms (approx. 150-times faster than
FX3U). Achieve maximum performance even when using 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
MELSEC iQ-F features powerful positioning functionality with 8 ch high-speed pulse input and 4-axis pulse output. Positioning
operations including interrupt, variable speed, and simple interpolation can easily be set up in tables and executed.

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.

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.

1 Outline
16 1.1 Outline of the MELSEC iQ-F Series
■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
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. 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.

Selection and Replacement of the Models

The CPU modules and extension modules of FX3U/FX3UC can be replaced by selecting models from the successor models
FX5U/FX5UC that match the system.
• FX3U

Selection of
Page 18 Replacement from FX3U to FX5U
the models

• FX3UC

Selection of
Page 25 Replacement from FX3UC to FX5UC
the models

Replacement of the Projects

FX3U/FX3UC projects created by GX Works2 can be converted to MELSEC iQ-F projects by GX Works3. (GX Works2 must
also be installed)

Replacement of the projects

Page 33 Conversion of the Projects

1 Outline
1.2 Substitute Models 17
 2 Replacement from FX3U to FX5U

2.1 Outline
FX5U, which is the successor model of the FX3U, is equipped with analog functions, communication and high-speed input/
output etc., and can easily be expanded with expansion boards and expansion adapters. The high-speed system bus
communication brings out the maximum performance of extension modules equipped with intelligent functions.
The procedures and points for replacing to the successor model FX5U are shown below. Please consider replacement with
the information.

Points to Consider
• The “recommended substitute models” are described for individual FX3U and extension modules that can be replaced by
iQ-F Series models. According to usage and system configuration (connection status of the extension modules), and cases
when the I/O numbers actually used are small, other models than the described “recommended substitute models” may be
suitable for replacement.
• The recommended substitute models for extension modules, function expansion boards and built-in batteries are described
with those that can be connected to the FX5U CPU module.
• Contents that require special caution when replacing each model are described in “Special notes”. Most recommended
substitute models have various differences in specifications other than those in “Special notes” such as the dimension
becoming smaller than the current models. Therefore, when considering usage, please check not only the “Special notes”
but also the details of each specification for the dimension and power specifications etc., in the manual.
• Based on the above conditions, “No recommended substitute models” is described for those without a recommended
substitute model, but there are cases that can be replaced with an FX5U system configuration according to usage and
system configuration. Check the necessary functions and features when considering the replacement with FX5U system
configuration.

2.2 Replacement Procedure

The replacement procedure is shown below.
The successor model FX5U is recommended when replacing from FX3U.

1. Selection of the models

Select the substitute models.
Page 19 Selection of Substitute Models

2. Conversion of the program

Convert the program used in FX3U to be able to use in FX5U.
Page 33 Conversion of the Projects

3. Replacement to the substitute models

Replace the PLCs.
Page 24 Replacement of the PLC

2 Replacement from FX3U to FX5U

18 2.1 Outline
2.3 Selection of Substitute Models
Recommended Substitute Models

Recommended Substitute Models for CPU Modules

2
The recommended substitute models of FX5U compatible with FX3U are introduced.
Please consider to replace the currently used CPU modules to the following recommended substitute models.

■FX3U and recommended substitute models list (CPU modules)

FX3U Series Recommended Substitute Models Special notes
Device name Model name Model name
CPU module FX3U-16MR/ES FX5U-32MR/ES The number of I/O increases in the recommended
substitute models.
FX3U-16MT/ES FX5U-32MT/ES The number of I/O increases in the recommended
substitute models.
FX3U-16MT/ESS FX5U-32MT/ESS The number of I/O increases in the recommended
substitute models.
FX3U-32MR/ES FX5U-32MR/ES
FX3U-32MS/ES No recommended substitute models
FX3U-32MT/ES FX5U-32MT/ES
FX3U-32MT/ESS FX5U-32MT/ESS
FX3U-48MR/ES FX5U-64MR/ES The number of I/O increases in the recommended
substitute models.
FX3U-48MT/ES FX5U-64MT/ES The number of I/O increases in the recommended
substitute models.
FX3U-48MT/ESS FX5U-64MT/ESS The number of I/O increases in the recommended
substitute models.
FX3U-64MR/ES FX5U-64MR/ES
FX3U-64MS/ES No recommended substitute models
FX3U-64MT/ES FX5U-64MT/ES
FX3U-64MT/ESS FX5U-64MT/ESS
FX3U-80MR/ES FX5U-80MR/ES
FX3U-80MT/ES FX5U-80MT/ES
FX3U-80MT/ESS FX5U-80MT/ESS
FX3U-128MR/ES FX5U-80MR/ES+FX5-16ER/ES
FX3U-128MT/ES FX5U-80MT/ES+FX5-16ET/ES
FX3U-128MT/ESS FX5U-80MT/ESS+FX5-16ET/ESS
FX3U-16MR/DS FX5U-32MR/DS The number of I/O increases in the recommended
substitute models.
FX3U-16MT/DS FX5U-32MT/DS The number of I/O increases in the recommended
substitute models.
FX3U-16MT/DSS FX5U-32MT/DSS The number of I/O increases in the recommended
substitute models.
FX3U-32MR/DS FX5U-32MR/DS
FX3U-32MT/DS FX5U-32MT/DS
FX3U-32MT/DSS FX5U-32MT/DSS
FX3U-48MR/DS FX5U-64MR/DS The number of I/O increases in the recommended
substitute models.
FX3U-48MT/DS FX5U-64MT/DS The number of I/O increases in the recommended
substitute models.
FX3U-48MT/DSS FX5U-64MT/DSS The number of I/O increases in the recommended
substitute models.
FX3U-64MR/DS FX5U-64MR/DS

2 Replacement from FX3U to FX5U

2.3 Selection of Substitute Models 19
 FX3U Series Recommended Substitute Models Special notes
Device name Model name Model name
CPU module FX3U-64MT/DS FX5U-64MT/DS
FX3U-64MT/DSS FX5U-64MT/DSS
FX3U-80MR/DS FX5U-80MR/DS
FX3U-80MT/DS FX5U-80MT/DS
FX3U-80MT/DSS FX5U-80MT/DSS
FX3U-32MR/UA1 No recommended substitute models
FX3U-64MR/UA1 No recommended substitute models

Recommended Substitute Models for Extension Devices

The following list shows the extension devices that will be necessary to replace simultaneously when replacing the CPU
module from FX3U to FX5U.
For products without a substitute model of the same function, check the contents described in the Special notes and please
consider system reconfiguration.

■List of extension devices required to replace when replacing the CPU module from FX3U to
FX5U
Extension device Recommended Substitute Models Special notes
Device name Model name Model name
Extension I/O FX2N-8ER FX5-16ER/ES The number of I/O increases in the recommended
substitute models.
FX2N-8ER-ES/UL FX5-16ER/ES The number of I/O increases in the recommended
substitute models.
FX2N-8EX FX5-8EX/ES
FX2N-8EX-ES/UL FX5-8EX/ES
FX2N-8EX-UA1/UL No recommended substitute models
FX2N-16EX FX5-16EX/ES
FX2N-16EX-ES/UL FX5-16EX/ES
FX2N-16EX-C FX5-CNV-IF+FX5-C16EX/D Only a connector type module can be connected
after (on the right side of) FX5-CNV-IF.
FX2N-16EXL-C No recommended substitute models
FX2N-8EYR FX5-8EYR/ES
FX2N-8EYR-ES/UL FX5-8EYR/ES
FX2N-8EYR-S-ES/UL No recommended substitute models
FX2N-8EYT FX5-8EYT/ES
FX2N-8EYT-ESS/UL FX5-8EYT/ESS
FX2N-8EYT-H No recommended substitute models
FX2N-16EYR FX5-16EYR/ES
FX2N-16EYR-ES/UL FX5-16EYR/ES
FX2N-16EYT FX5-16EYT/ES
FX2N-16EYT-ESS/UL FX5-16EYT/ESS
FX2N-16EYT-C FX5-CNV-IF+FX5-C16EYT/D Only a connector type module can be connected
after (on the right side of) FX5-CNV-IF.
FX2N-16EYS No recommended substitute models
FX2N-32ER FX5-32ER/ES
FX2N-32ER-ES/UL FX5-32ER/ES
FX2N-32ET FX5-32ET/ES
FX2N-32ET-ESS/UL FX5-32ET/ESS
FX2N-32ES No recommended substitute models
FX2N-48ER FX5-32ER/ES+FX5-16ER/ES
FX2N-48ER-ES/UL FX5-32ER/ES+FX5-16ER/ES
FX2N-48ET FX5-32ET/ES+FX5-16ET/ES
FX2N-48ET-ESS/UL FX5-32ET/ESS+FX5-16ET/ESS

2 Replacement from FX3U to FX5U

20 2.3 Selection of Substitute Models
Extension device Recommended Substitute Models Special notes
Device name Model name Model name
Extension I/O FX2N-48ER-D FX5-32ER/DS+FX5-16ER/ES
FX2N-48ER-DS FX5-32ER/DS+FX5-16ER/ES
FX2N-48ET-D FX5-32ET/DS+FX5-16ET/ES
FX2N-48ET-DSS FX5-32ET/DSS+FX5-16ET/ESS
2
FX2N-48ER-UA1/UL No recommended substitute models
Extension device FX3U-1PSU-5V FX5-1PSU-5V
FX2N-5A FX5-4AD+FX5-4DA The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2AD FX5-4AD The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-8AD FX5-8AD The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2LC FX5-4LC The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2DA FX5-4DA The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-1HC FX3U-2HC*1 Replacement of the wiring from the screw terminal
block to the connector is necessary.
FX2N-10PG FX5-20PG-D Replacement is necessary due to the difference of
the connector type.
FX3U-20SSC-H FX5-40SSC-S Replacement is necessary due to the difference of
the connector type for external input connection.
FX2N-232IF No recommended substitute models
FX2N-32CCL FX5-CCL-MS Set to the intelligent device station in the
recommended substitute models.*2
FX2N-64CL-M No recommended substitute models
FX3U-ENET No recommended substitute models Ethernet port is built into FX5U CPU module.
FX3U-64DP-M FX5-DP-M
FX3U-CAN No recommended substitute models
FX3U-J1939 No recommended substitute models
FX2N-10GM FX5-20PG-P It cannot be used alone.
Replacement is necessary due to the difference of
the connector type.
FX2N-20GM FX5-20PG-P It cannot be used alone.
Replacement is necessary due to the difference of
the connector type.
FX2N-1RM-SET(-E) No recommended substitute models
FX2N-32DP-IF(-D) No recommended substitute models
FX2N-64DNET No recommended substitute models
Expansion board FX3U-232-BD FX5-232-BD
FX3U-485-BD FX5-485-BD
FX3U-422-BD FX5-422-BD-GOT GOT can only be connected to FX5-422-BD-GOT.
FX3U-CNV-BD  Not necessary for FX5U CPU module.
FX3U-8AV-BD No recommended substitute models
FX3U-USB-BD No recommended substitute models

2 Replacement from FX3U to FX5U

2.3 Selection of Substitute Models 21
 Extension device Recommended Substitute Models Special notes
Device name Model name Model name
Expansion adapter FX3U-232ADP(-MB) FX5-232ADP
FX3U-485ADP(-MB) FX5-485ADP
FX3U-ENET-ADP No recommended substitute models Ethernet port is built into FX5U CPU module.
FX3U-3A-ADP FX5-4AD-ADP+FX5-4DA-ADP
FX3U-4AD-ADP FX5-4AD-ADP
FX3U-4DA-ADP FX5-4DA-ADP
FX3U-4AD-PT-ADP FX5-4AD-PT-ADP
FX3U-4AD-PTW-ADP No recommended substitute models
FX3U-4AD-PNK-ADP No recommended substitute models
FX3U-4AD-TC-ADP FX5-4AD-TC-ADP
FX3U-4HSX-ADP No recommended substitute models
FX3U-2HSY-ADP No recommended substitute models
FX3U-CF-ADP No recommended substitute models
Option FX3U-FLROM-16 No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-64 No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-64L No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-1M No recommended substitute models Substituted by an SD memory card.
FX3U-7DM No recommended substitute models
FX-30P No recommended substitute models
FX0N-30EC FX5-30EC
FX0N-65EC FX5-65EC
FX2N-CNV-BC FX5-CNV-BC

*1 It is possible to connect to the system of FX5U CPU module by connecting the bus conversion module (FX5-CNV-BUS).
*2 FX5-CCL-MS can be used as a master station.

Extension devices that can be reused when the CPU module is replaced to FX5U
The following extension modules can be used by connecting the bus conversion module (FX5-CNV-BUS) even when the CPU
module is replaced from the FX3U to FX5U.

■Extension devices that can be used even when the CPU module is replaced from the FX3U to
FX5U
Extension Analog Positioning High-speed Network Terminal module*1
power supply counter
FX3U-1PSU-5V FX3U-4AD FX3U-1PG FX3U-2HC FX3U-16CCL-M*2 FX-16E-TB FX-16E-TB/UL
FX3U-4DA FX3U-64CCL FX-32E-TB FX-32E-TB/UL
FX3U-4LC FX3U-128ASL-M*2 FX-16EX-A1-TB FX-16EYR-ES-TB/UL
FX3U-32DP FX-16EYR-TB FX-16EYS-ES-TB/UL
FX-16EYS-TB FX-16EYT-ES-TB/UL
FX-16EYT-TB FX-16EYT-ESS-TB/UL

*1 The terminal module can be used without connecting a bus conversion module.
*2 It is necessary to set the parameter with the PLC program.

Battery
The battery (FX3U-32BL) used in FX3U can also be used with FX5U.

2 Replacement from FX3U to FX5U

22 2.3 Selection of Substitute Models
Precautions Regarding the Hardware

Comparison of FX3U and FX5U and Precautions for Replacement

The following list shows precautions of the hardware. Check details in the manuals of each model when replacing.

■Difference and precautions regarding the main hardware of FX3U and FX5U
2
Item Difference Precautions
FX3U FX5U
Extension of FX2N and FX3U Extension possible Extension is possible only for Connection is not possible for some intelligent
certain modules. modules of FX3U.
FX5-CNV-BUS is required for
extension.
Input hardware filter X0 to X5: 5 μs ■In the case of FX5U-32M Noises that were not detected by FX3U may
(When the digital filter is 0) X6 to X7: 50 μs X0 to X5: possibly be captured as an input. Take
• High-speed counter X10 to X17: 200 μs • ON: 2.5 μs or less measures against noise on the outside, or set
• Input interruption function • OFF: 2.5 μs or less an appropriate input response time parameter.
• Pulse catch function X6 to X17:
• ON: 30 μs or less
• OFF: 50 μs or less
■In the case of FX5U-64M and
FX5U-80M
X0 to X7:
• ON: 2.5 μs or less
• OFF: 2.5 μs or less
X10 to X17:
• ON: 30 μs or less
• OFF: 50 μs or less
X20 or later:
• ON: 50 μs or less
• OFF: 150 μs or less
Input signal current X0 to X5: 6 mA X0 to X17: 5.3 mA The input signal current has been lowered, so it
X6 to X7: 7 mA X20 or later: 4 mA is necessary to check the specification of the
X10 or later: 5 mA external devices when replacing.

■External dimension drawing

There is some difference in the external dimension of FX3U and the successor model FX5U. Be careful when replacing the
modules.
• FX3U
2-4.5-diam mounting hole (16M, 32M) External color: Munsell 0.08GY/7.64/
4-4.5-diam mounting hole (48M to 128M) 0.81
There is no mounting hole * for 16M and 32M. Top cover: Munsell N1.5
* Unit: mm
The terminal block uses M3 terminal
screws
80 (mounting hole pitch)

35 mm width DIN rail can be

installed
90

*
22 W1 (mounting hole pitch) 9
W 86 (When FX3U-7DM installed: 88.5)

Model name W: mm W1: mm Weight: kg

FX3U-16M 130 103 0.60
FX3U-32M 150 123 0.65
FX3U-48M, FX3U-32MR/UA1 182 155 0.85
FX3U-64M 220 193 1.00
FX3U-80M, FX3U-64MR/UA1 285 258 1.20
FX3U-128M 350 323 1.80

2 Replacement from FX3U to FX5U

2.3 Selection of Substitute Models 23
 • FX5U
2-4.5-diam mounting hole (32M) External color: Munsell 0.6B7.6/0.2
4-4.5-diam mounting hole (64M, 80M) Unit: mm
There is no mounting hole * for 32M. The terminal block uses M3 terminal
* screws
35 mm width DIN rail can be

80 (mounting hole pitch)

installed

90
*
22 W1 (mounting hole pitch) 8
W 83

Model name W: mm W1: mm Weight: kg

FX5U-32M 150 123 0.70
FX5U-64M 220 193 1.00
FX5U-80M 285 258 1.20

■Cable sizes for European type terminal block

Suitable wiring and tightening torque are described below.
Wire size for Wire size for Wire ferrule with Tightening Stripping dimensions of
one wire two wires insulation sleeve torque electric wire ends
(wire size)
Built-in RS-485 communication AWG24 to AWG24 AWG24 to AWG20 0.22 to 0.25 5 mm
terminal block AWG20 N⋅m
Built-in analog I/O terminal block
FX3U-485-BD, FX3U-485ADP AWG22 to AWG22 AWG22 to AWG20 0.22 to 0.25 9 mm
AWG20 N⋅m
FX5-485-BD, FX5-485ADP
FX5-4AD-ADP, FX5-4DA-ADP, FX5- 0.20 N⋅m
4AD-PT-ADP, FX5-4AD-TC-ADP

2.4 Conversion of the Projects

For the conversion method of the project, refer to Page 33 Conversion of the Projects.

2.5 Replacement of the PLC

The main points to consider during replacement of the CPU module and extension modules are explained below.
For details of each item, check the reference pages in this document, and related manuals such as the PLC Hardware Manual
and Programming Manual.
Device Item Operation content and points of attention Reference page
classification
CPU module Reuse of the input/output wiring Perform rewiring for the connection part of the terminal block Page 19
type.
Other extension Wiring to each module
modules
Verifying operation of the Operation and test of the PLC program Operate the converted PLC program and hardware devices, Page 33
equipment and check and adjust the device function and operation
timing.
Be aware of the precautions described on the reference page
for replacing the project, and check that the devices operate
as they are designed.

2 Replacement from FX3U to FX5U

24 2.4 Conversion of the Projects
3 Replacement from FX3UC to FX5UC

3.1 Outline
FX5UC, the successor model of FX3UC, has compact and easy-to-use compatible extension modules, which makes
downsizing of various devices possible. Connect to the FX5 and FX3 extension modules with the variety of conversion
modules available.
The procedures and points for replacing to the successor model FX5UC are shown below. Please consider replacement with
3
the information.

Points to Consider
• The “recommended substitute models” are described for individual FX3UC and extension modules that can be replaced by
iQ-F Series models. According to usage and system configuration (connection status of the extension modules), and cases
when the I/O numbers actually used are small, other models than the described “recommended substitute models” may be
suitable for replacement.
• The recommended substitute models for extension modules and built-in batteries are described with those that can be
connected to the FX5UC CPU module.
• Contents that require special caution when replacing each models are described in “Special notes”. Most recommended
substitute models have various differences in the specifications other than those in “Special notes” such as the dimension
becoming smaller than the current models. Therefore, when considering usage, please check not only the “Special notes”
but also the details of each specification for the dimension and power specifications etc., in the manual.
• Based on the above conditions, “No recommended substitute models” is described for those without a recommended
substitute model, but there are cases that can be replaced with an FX5UC system configuration according to usage and
system configuration. Check the necessary functions and features when considering the replacement with FX5UC system
configuration.

3.2 Replacement Procedure

The replacement procedure is shown below.
The successor model FX5UC is recommended when replacing from FX3UC.

1. Selection of the models

Select the substitute models.
Page 26 Selection of Substitute Models

2. Conversion of the program

Convert the program used in FX3UC to be able to use in FX5UC.
Page 33 Conversion of the Projects

3. Replacement to the substitute models

Replace the PLCs.
Page 32 Replacement of the PLC

3 Replacement from FX3UC to FX5UC

3.1 Outline 25
 3.3 Selection of Substitute Models
Recommended Substitute Models

Recommended Substitute Models for CPU Modules

The recommended substitute models of FX5UC compatible with FX3UC are introduced below.
Please consider to replace the currently used CPU modules to the following recommended substitute models.

■FX3UC and recommended substitute models list (CPU modules)

FX3UC Series Recommended Substitute Models Special notes
Device name Model name Model name
CPU module FX3UC-16MR/D-T No recommended substitute models
FX3UC-16MT/D FX5UC-32MT/D The number of I/O increases in the recommended
substitute models.
FX3UC-32MT/D FX5UC-32MT/D
FX3UC-64MT/D FX5UC-64MT/D
FX3UC-96MT/D FX5UC-96MT/D
FX3UC-16MR/DS-T No recommended substitute models
FX3UC-16MT/DSS FX5UC-32MT/DSS The number of I/O increases in the recommended
substitute models.
FX3UC-32MT/DSS FX5UC-32MT/DSS
FX3UC-64MT/DSS FX5UC-64MT/DSS
FX3UC-96MT/DSS FX5UC-96MT/DSS
FX3UC-32MT-LT-2 No recommended substitute models

3 Replacement from FX3UC to FX5UC

26 3.3 Selection of Substitute Models
Recommended Substitute Models for Extension Devices
The following list shows the extension devices that will be necessary to replace simultaneously when replacing the CPU
module from FX3UC to FX5UC.
For products without a substitute model of the same function, check the contents described in the Special notes and please
consider system reconfiguration.

■List of extension devices required to replace when replacing the CPU module from FX3UC to
FX5UC
Extension device Recommended Substitute Models Special notes 3
Device name Model name Model name
Extension I/O FX2NC-16EX FX5-C16EX/D
FX2NC-16EX-DS FX5-C16EX/DS
FX2NC-16EX-T FX5-C32EX/DS-TS The number of I/O increases in the recommended
substitute models.
The wiring must be replaced from the European
terminal block to the spring clamp terminal block.
FX2NC-16EYT FX5-C16EYT/D
FX2NC-16EYT-DSS FX5-C16EYT/DSS
FX2NC-16EYR-T No recommended substitute models
FX2NC-32EX FX5-C32EX/D
FX2NC-32EX-DS FX5-C32EX/DS
FX2NC-32EYT FX5-C32EYT/D
FX2NC-32EYT-DSS FX5-C32EYT/DSS
FX2N-8ER FX5-16ER/ES The number of I/O increases in the recommended
substitute models.
FX2N-8ER-ES/UL FX5-16ER/ES The number of I/O increases in the recommended
substitute models.
FX2N-8EX FX5-8EX/ES
FX2N-8EX-ES/UL FX5-8EX/ES
FX2N-8EX-UA1/UL No recommended substitute models
FX2N-16EX FX5-16EX/ES
FX2N-16EX-ES/UL FX5-16EX/ES
FX2N-16EX-C FX5-C16EX/D
FX2N-16EXL-C No recommended substitute models
FX2N-8EYR FX5-8EYR/ES
FX2N-8EYR-ES/UL FX5-8EYR/ES
FX2N-8EYR-S-ES/UL No recommended substitute models
FX2N-8EYT FX5-8EYT/ES
FX2N-8EYT-ESS/UL FX5-8EYT/ESS
FX2N-8EYT-H No recommended substitute models
FX2N-16EYR FX5-16EYR/ES
FX2N-16EYR-ES/UL FX5-16EYR/ES
FX2N-16EYT FX5-16EYT/ES
FX2N-16EYT-ESS/UL FX5-16EYT/ESS
FX2N-16EYT-C FX5-C16EYT/D
FX2N-16EYS No recommended substitute models

3 Replacement from FX3UC to FX5UC

3.3 Selection of Substitute Models 27
 Extension device Recommended Substitute Models Special notes
Device name Model name Model name
Extension device FX2NC-1HC FX3U-2HC*1 The European terminal block must be replaced to
the 40-pin connector.
FX3UC-4AD FX5-4AD The wiring must be replaced from the European
terminal block to the spring clamp terminal block.
FX2N-5A FX5-4AD+FX5-4DA The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2AD FX5-4AD The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-8AD FX5-8AD The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2LC FX5-4LC The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-2DA FX5-4DA The wiring must be replaced from the screw
terminal block to the spring clamp terminal block.
FX2N-1HC FX3U-2HC*1 Replacement of the wiring from the screw terminal
block to the connector is necessary.
FX2N-10PG FX5-20PG-D Replacement is necessary due to the difference of
the connector type.
FX3U-20SSC-H FX5-40SSC-S Replacement is necessary due to the difference of
the connector type for external input connection.
FX2N-232IF No recommended substitute models
FX2N-32CCL FX5-CCL-MS Set to the intelligent device station in the
recommended substitute models.*2
FX2N-64CL-M No recommended substitute models
FX3U-ENET No recommended substitute models Ethernet port is built into FX5UC CPU module.
FX3U-64DP-M FX5-DP-M
FX3U-CAN No recommended substitute models
FX3U-J1939 No recommended substitute models
FX2N-10GM FX5-20PG-P It cannot be used alone.
Replacement is necessary due to the difference of
the connector type.
FX2N-20GM FX5-20PG-P It cannot be used alone.
Replacement is necessary due to the difference of
the connector type.
FX2N-1RM-SET(-E) No recommended substitute models
FX2N-32DP-IF(-D) No recommended substitute models
FX2N-64DNET No recommended substitute models
Expansion adapter FX3U-232ADP(-MB) FX5-232ADP
FX3U-485ADP(-MB) FX5-485ADP
FX3U-ENET-ADP No recommended substitute models Ethernet port is built into FX5UC CPU module.
FX3U-3A-ADP FX5-4AD-ADP+FX5-4DA-ADP
FX3U-4AD-ADP FX5-4AD-ADP
FX3U-4DA-ADP FX5-4DA-ADP
FX3U-4AD-PT-ADP FX5-4AD-PT-ADP
FX3U-4AD-PTW-ADP No recommended substitute models
FX3U-4AD-PNK-ADP No recommended substitute models
FX3U-4AD-TC-ADP FX5-4AD-TC-ADP
FX3U-CF-ADP No recommended substitute models

3 Replacement from FX3UC to FX5UC

28 3.3 Selection of Substitute Models
Extension device Recommended Substitute Models Special notes
Device name Model name Model name
Option FX2NC-CNV-IF FX5-CNV-IFC
FX3UC-1PS-5V FX5-C1PS-5V
FX3U-FLROM-16 No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-64 No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-64L No recommended substitute models Substituted by an SD memory card.
FX3U-FLROM-1M No recommended substitute models Substituted by an SD memory card.
FX-30P
FX0N-30EC
No recommended substitute models
FX5-30EC
3
FX0N-65EC FX5-65EC
FX2N-CNV-BC FX5-CNV-BC

*1 It is possible to connect to the system of FX5UC CPU module by connecting a bus conversion module (FX5-CNV-BUSC or FX5-CNV-
BUS).
*2 FX5-CCL-MS can be used as a master station.

Extension devices that can be reused when the CPU module is replaced to FX5UC
The following extension devices can be used by connecting a bus conversion module (FX5-CNV-BUSC or FX5-CNV-BUS)
even when the CPU module is replaced from the FX3UC to FX5UC.

■Extension devices that can be used even when the CPU module is replaced from the FX3UC
to FX5UC
Analog Positioning High-speed Network Terminal module*1
counter
FX3U-4AD FX3U-1PG FX3U-2HC FX3U-16CCL-M*2 FX-16E-TB FX-16E-TB/UL
FX3U-4DA FX3U-64CCL FX-32E-TB FX-32E-TB/UL
FX3U-4LC FX3U-128ASL-M*2 FX-16EX-A1-TB FX-16EYR-ES-TB/UL
FX3U-32DP FX-16EYR-TB FX-16EYS-ES-TB/UL
FX-16EYS-TB FX-16EYT-ES-TB/UL
FX-16EYT-TB FX-16EYT-ESS-TB/UL

*1 The terminal module can be used without connecting a bus conversion module.
*2 It is necessary to set the parameter with the PLC program.

Battery
The battery (FX3U-32BL) used in FX3UC can also be used with FX5UC.

3 Replacement from FX3UC to FX5UC

3.3 Selection of Substitute Models 29
 Precautions Regarding the Hardware

Comparison of FX3UC and FX5UC and Precautions for Replacement

The following list shows precautions of the hardware. Check details in the manuals of each models when replacing.

■Difference and precautions regarding the main hardware of FX3UC and FX5UC
Item Difference Precautions
FX3UC FX5UC
Extension of FX2N, FX2NC, FX3U, Extension possible Extension is possible only for Connection is not possible for some intelligent
and FX3UC certain modules. modules of FX3U.
FX5-CNV-BUSC or FX5-CNV-
BUS is required for extension.
Input hardware filter X0 to X5: 5 μs ■In the case of FX5UC-32M Noises that were not detected by FX3UC may
(When the digital filter is 0) X6 to X7: 50 μs X0 to X5: possibly be captured as an input. Take
• High-speed counter X10 to X17: 200 μs • ON: 2.5 μs or less measures against noise on the outside, or set
• Input interruption function • OFF: 2.5 μs or less an appropriate input response time parameter.
• Pulse catch function X6 to X17:
• ON: 30 μs or less
• OFF: 50 μs or less
■In the case of FX5UC-64M
and FX5UC-96M
X0 to X7:
• ON: 2.5 μs or less
• OFF: 2.5 μs or less
X10 to X17:
• ON: 30 μs or less
• OFF: 50 μs or less
X20 or later:
• ON: 50 μs or less
• OFF: 150 μs or less
Input signal current X0 to X5: 6 mA X0 to X17: 5.3 mA The input signal current has been lowered, so it
X6 to X7: 7 mA X20 or later: 4 mA is necessary to check the specification of the
X10 or later: 5 mA external devices when replacing.

3 Replacement from FX3UC to FX5UC

30 3.3 Selection of Substitute Models
■External dimension drawing
There is some difference in the external dimension of FX3UC and the successor model FX5UC. Be careful when replacing
the modules.
• FX3UC
External color: Munsell 0.08GY/7.64/0.81
Unit: mm
35 mm width DIN rail can be installed

[Accessories]
FX2NC-100MPCB power cable
FX2NC-100BPCB power cable (only FX3UC-MT/D) 3
90

W 13 74

Model name W: mm Weight: kg

FX3UC-16MT/D, DSS, FX3UC-32MT/D, DSS 34.0 0.20
FX3UC-64MT/D, DSS 59.7 0.30
FX3UC-96MT/D, DSS 85.4 0.35

External color: Munsell 0.08GY/7.64/0.81

Unit: mm
35 mm width DIN rail can be installed

[Accessories]
FX2NC-100MPCB power cable
FX2NC-100BPCB power cable (only FX3UC-16MR/D-T)
90

W 15 74

Model name W: mm Weight: kg

FX3UC-16MR/D-T, FX3UC-16MR/DS-T 34.0 0.25

• FX5UC
External color: Munsell 0.6B7.6/0.2
Unit: mm
35 mm width DIN rail can be installed

[Accessories]
FX2NC-100MPCB power cable
90

FX2NC-100BPCB power cable (only FX5UC-MT/D)

74
W 89.1

Model name W: mm Weight: kg

FX5UC-32MT/D, DSS 42.1 0.20
FX5UC-64MT/D, DSS 62.2 0.30
FX5UC-96MT/D, DSS 82.3 0.35

3 Replacement from FX3UC to FX5UC

3.3 Selection of Substitute Models 31
 ■Cable sizes for European type terminal block
Suitable wiring and tightening torque are described below.
Wire size for Wire size for Wire ferrule with Tightening Stripping dimensions of
one wire two wires insulation sleeve torque electric wire ends
(wire size)
Built-in RS-485 communication AWG22 to AWG22 AWG22 to AWG20 0.22 to 0.25 9 mm
terminal block AWG20 N⋅m
FX3U-485ADP
FX5-485ADP
FX5-4AD-ADP, FX5-4DA-ADP, FX5- 0.20 N⋅m
4AD-PT-ADP, FX5-4AD-TC-ADP

3.4 Conversion of the Projects

For the conversion method of the project, refer to Page 33 Conversion of the Projects.

3.5 Replacement of the PLC

The main points to consider during replacement of the CPU module and extension devices are explained below.
For details of each item, check the reference pages in this document, and related manuals such as the PLC Hardware Manual
and Programming Manual.
Device Item Operation content and points of attention Reference page
classification
CPU module Connector connection of the input/ The input/output connector and 24 V DC connector types and Page 26
output wiring signal names are the same for FX3UC and FX5UC.
Reconnect the cable removed from FX3UC to FX5UC.
Connector connection of the 24 V DC
Perform rewiring for the connection part of the terminal block
power cable
type.
Other extension Wiring to each module The input/output connector and 24 V DC connector and signal
modules names are the same for FX2NC and FX5UC. Reconnect the
cable removed from FX2NC to FX5UC.
Perform rewiring for the connection part of the terminal block
type.
Verifying operation of the Operation and test of the PLC program Operate the converted PLC program and hardware devices, Page 33
equipment and check and adjust the device function and operation
timing.
Be aware of the precautions described on the reference page
for replacing the project, and check that the devices operate
as they are designed.

3 Replacement from FX3UC to FX5UC

32 3.4 Conversion of the Projects
4 Conversion of the Projects
When converting the projects of FX3U/FX3UC to MELSEC iQ-F project, perform the conversion by using GX Works3.
After converting the projects, it may be necessary to adjust the programs (instructions, devices) and parameters.

4.1 Operation Method for Replacing Projects

For converting the projects of FX3U/FX3UC to MELSEC iQ-F, perform by using GX Works3.

Conversion of the projects

4
Write with GX Works3 MELSEC iQ-F

GX Works2 format GX Works3 format

project data project data
Conversion

To convert the projects, install the engineering tool of the following version.
Engineering tool Version Remarks
GX Works3 1.020W or higher 
GX Works2 1.519R or higher Supplied with GX Works3.

When converting project data other than FX3U/FX3UC, change the PLC type to FX3U/FX3UC using GX
Works2. After changing the PLC type, check that there is no error using GX Works2, and then convert to
MELSEC iQ-F using GX Works3.

Precautions
• To read out projects of GX Works2 using GX Works3, convert beforehand using GX Works2, and then read out the projects.
Even for projects converted using GX Works2, conversion may not be performed according to the state of the project. If
there is an error in the program, read out will be canceled.
• To read out projects of GX Works2 using GX Works3, administrator rights are required.

4 Conversion of the Projects

4.1 Operation Method for Replacing Projects 33
 Operating procedure
1. Start up GX Works3.

2. Open the project of FX3U/FX3UC.

Select [Project][Open Other Format File][GX Works2 Format][Open Project]Project (***.gxw).

3. The following display is shown.

• For GX Works3 version 1.040S and later
A selection screen of the following conversion method is shown.
Select the conversion method and press the [Execute] button.

4 Conversion of the Projects

34 4.1 Operation Method for Replacing Projects
• For GX Works3 version 1.038Q and earlier
The following message is shown. After checking the contents, press the [OK] button.

• The display contents may vary depending on the version of the software.
• Precautions for the converted project are displayed. Please read carefully through the contents before use.

4 Conversion of the Projects

4.1 Operation Method for Replacing Projects 35
 4. When conversion is completed, the following message is shown.

5. Check the contents of the model change result in the “Output window”.

Output window

6. Set the converted program to “Scan”. (In GX Works3 version 1.025B or later, the converted program is set to “Scan”.)
The converted program is stored in “No Execution Type”. Set to scan by any of the following methods.
• When setting in the “Navigation window”
Drag using the mouse and move to “Scan”.

Drag and
move

4 Conversion of the Projects

36 4.1 Operation Method for Replacing Projects
• When setting “Scan” by parameter
[CPU parameter]”Program setting””Program setting””Detail setting”Program Name

Set the program.

Precautions
• The program must be changed from “No Execution Type”. (Change to Scan, etc.)
• The program instructions and devices may have changed. Check the contents of the project. Parameters other than the
network parameter of CC-Link*1 will be deleted. Set the parameters if necessary.
*1 For the network parameter of CC-Link, refer to Page 50 Precautions when Replacing the Parameters.
7. Set the model name of the CPU for the system parameter.
[System Parameter][I/O Assignment Setting]Model Name

Set model name.

8. Perform conversion.
[Convert][Rebuild All]

4 Conversion of the Projects

4.1 Operation Method for Replacing Projects 37
 4.2 Precautions when Converting the Projects
• When converting projects of the FX3 Series using GX Works3, be careful because the program (instructions and devices)
may be changed.
• When converting projects, the number of steps may increase and writing to the FX5 CPU module may be impossible.
Check the number of steps after replacement.
• Characters used for the label name in GX Works2 may correspond to reserved words or illegal characters in GX Works3. In
that case, change the label name.

Instruction Replacement List

Instruction Replacement List of Ladder Programs

■Replaced instructions
The following instructions will be replaced to GX Works3 compatible instructions when converting the project.
FX3 Series → MELSEC iQ-F Remarks
OUT T → OUT T/ST, OUTH T/ST, OUTHS T/ST When a label is used instead of a
• When the timer is 1 ms, it will be timer device, the instructions will not
replaced to the OUTHS T/ST be replaced.*1
instruction.
• When the timer is 10 ms, it will be
replaced to the OUTH T/ST
instruction.
• When the timer is 100 ms, it will be
replaced to the OUT T/ST
instruction.
INT → FLT2INT 
INTP → FLT2INTP 
DINT → FLT2DINT 
DINTP → FLT2DINTP 
RET → RETSTL 
FLT → INT2FLT 
FLTP → INT2FLTP 
DFLT → DINT2FLT 
DFLTP → DINT2FLTP 
DTBL → TBL 
SQR → SQRT 
SER → SERMM 
RAMP → RAMPF 
SORT → SORTTBL 
HEX → HEXA 
SORT2 → SORTTBL2 
HOUR → HOURM 
SQRP → SQRTP 
DSQR → DSQRT 
DSQRP → DSQRTP 
SERP → SERMMP 
DSER → DSERMM 
DSERP → DSERMMP 
HEXP → HEXAP 
DSORT2 → DSORTTBL2 
DHOUR → DHOURM 

4 Conversion of the Projects

38 4.2 Precautions when Converting the Projects
FX3 Series → MELSEC iQ-F Remarks
IVCK → IVCK SM4095 is added to parameters of
instructions. Change to an
IVDR → IVDR
appropriate device or label.
IVRD → IVRD
IVWR → IVWR
IVBWR → IVBWR
IVMC → IVMC
ADPRW → ADPRW
PR → OUT SM4095 These instructions are not supported
by MELSEC iQ-F. Therefore, It will be
COMRD → OUT SM4095
replaced to OUT SM4095.
COMRDP → OUT SM4095
REFF → OUT SM4095
REFFP → OUT SM4095
4
DHSCT → OUT SM4095
PLSR → OUT SM4095
DPLSR → OUT SM4095
RS → OUT SM4095
VRRD → OUT SM4095
VRRDP → OUT SM4095
VRSC → OUT SM4095
VRSCP → OUT SM4095
ZRN → OUT SM4095
DZRN → OUT SM4095
HKY → OUT SM4095
DHKY → OUT SM4095
TKY → OUT SM4095
DTKY → OUT SM4095
ARWS → OUT SM4095
RD3A → OUT SM4095
RD3AP → OUT SM4095
WR3A → OUT SM4095
WR3AP → OUT SM4095
LOADR → ERREAD*2 
SAVER → OUT SM4095 These instructions are not supported
by MELSEC iQ-F. Therefore, It will be
INITR → OUT SM4095
replaced to OUT SM4095.
INITRP → OUT SM4095
LOGR → OUT SM4095
LOGRP → OUT SM4095
RWER → ERWRITE*2 
RWERP → ERWRITE*2 
INITER → ERINIT*2 
INITERP → ERINIT*2 
FLCRT → OUT SM4095 These instructions are not supported
by MELSEC iQ-F. Therefore, It will be
FLDEL → OUT SM4095
replaced to OUT SM4095.
FLWR → OUT SM4095
FLRD → OUT SM4095
FLCMD → OUT SM4095
FLSTRD → OUT SM4095
ASC → OUT SM4095

*1 For GX Works3 version 1.032J and later, the instructions will be replaced when a timer device is assigned to the global label.
*2 For GX Works3 version 1.038Q and earlier, the instructions will be replaced with OUT SM4095.

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 39
 Precautions
When inline ST is used with the ladder program, instructions and devices can be replaced like ST programs. However,
readout of the program may fail depending on the following conditions.
• If a syntax error exists
• If the program exceeds 2048 characters
If there is an instruction that is not supported by the MELSEC iQ-F Series in the program created using GX Works2, the
instruction will be changed to the instruction using SM4095/SD4095.

Instruction Replacement List of Structured Ladder to FBD/LD

■Replaced instructions
The following instructions will be replaced to GX Works3 compatible instructions when converting the project.
FX3 Series → MELSEC iQ-F Remarks
OUT_T → OUT_T, OUTH, OUTHS When a label is used instead of a
• When the timer is 1 ms, it will be timer device, the instructions will not
replaced to the OUTHS instruction. be replaced.*1
• When the timer is 10 ms, it will be
replaced to the OUTH instruction.
• When the timer is 100 ms, it will be
replaced to the OUT_T instruction.
SQRP → SQRTP 
DSQR → DSQRT 
DSQRP → DSQRTP 
FLT → INT2FLT 
FLTP → INT2FLTP 
DFLT → DINT2FLT 
DFLTP → DINT2FLTP 
SER → SERMM 
SERP → SERMMP 
DSER → DSERMM 
DSERP → DSERMMP 
RAMP → RAMPF 
SORT → SORTTBL 
HEX → HEXA 
HEXP → HEXAP 
INT → FLT2INT 
INTP → FLT2INTP 
DINT → FLT2DINT 
DINTP → FLT2DINTP 
SORT2 → SORTTBL2 
DSORT2 → DSORTTBL2 
HOUR → HOURM 
DHOUR → DHOURM 
BK+ → BKPLUS 
BK+P → BKPLUSP 
DBK+ → DBKPLUS 
DBK+P → DBKPLUSP 
BK- → BKMINUS 
BK-P → BKMINUSP 
DBK- → DBKMINUS 
DBK-P → DBKMINUSP 
BKCMP= → BKCMP_EQ 
BKCMP=P → BKCMP_EQP 
DBKCMP= → DBKCMP_EQ 
DBKCMP=P → DBKCMP_EQP 

4 Conversion of the Projects

40 4.2 Precautions when Converting the Projects
FX3 Series → MELSEC iQ-F Remarks
BKCMP> → BKCMP_GT 
BKCMP>P → BKCMP_GTP 
DBKCMP> → DBKCMP_GT 
DBKCMP>P → DBKCMP_GTP 
BKCMP< → BKCMP_LT 
BKCMP<P → BKCMP_LTP 
DBKCMP< → DBKCMP_LT 
DBKCMP<P → DBKCMP_LTP 
BKCMP<> → BKCMP_NE 
BKCMP<>P → BKCMP_NEP 
DBKCMP<> → DBKCMP_NE 
DBKCMP<>P → DBKCMP_NEP 
4
BKCMP<= → BKCMP_LE 
BKCMP<=P → BKCMP_LEP 
DBKCMP<= → DBKCMP_LE 
DBKCMP<=P → DBKCMP_LEP 
BKCMP>= → BKCMP_GE 
BKCMP>=P → BKCMP_GEP 
DBKCMP>= → DBKCMP_GE 
DBKCMP>=P → DBKCMP_GEP 
$+ → STRINGPLUS 
$+P → STRINGPLUSP 
$MOV → STRINGMOV 
$MOVP → STRINGMOVP 
LD= → LD_EQ 
LDD= → LDD_EQ 
LD> → LD_GT 
LDD> → LDD_GT 
LD< → LD_LT 
LDD< → LDD_LT 
LD<> → LD_NE 
LDD<> → LDD_NE 
LD<= → LD_LE 
LDD<= → LDD_LE 
LD>= → LD_GE 
LDD>= → LDD_GE 
AND= → AND_EQ 
ANDD= → ANDD_EQ 
AND> → AND_GT 
ANDD> → ANDD_GT 
AND< → AND_LT 
ANDD< → ANDD_LT 
AND<> → AND_NE 
ANDD<> → ANDD_NE 
AND<= → AND_LE 
ANDD<= → ANDD_LE 
AND>= → AND_GE 
ANDD>= → ANDD_GE 
OR= → OR_EQ 
ORD= → ORD_EQ 
OR> → OR_GT 
ORD> → ORD_GT 
OR< → OR_LT 

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 41
 FX3 Series → MELSEC iQ-F Remarks
ORD< → ORD_LT 
OR<> → OR_NE 
ORD<> → ORD_NE 
OR<= → OR_LE 
ORD<= → ORD_LE 
OR>= → OR_GE 
ORD>= → ORD_GE 
IVCK → IVCK SM4095 is added to parameters of
instructions. Change to an
IVDR → IVDR
appropriate device or label.
IVRD → IVRD
IVWR → IVWR
IVBWR → IVBWR
IVMC → IVMC
ADPRW → ADPRW
LOADR → ERREAD*2 
*2
LOADRP → ERREAD 
RWER → ERWRITE*2 
RWERP → ERWRITE*2 
INITER → ERINIT*2 
INITERP → ERINIT*2 
SQR → SQRT_E These instructions will be converted
to standard functions.
LEN → LEN_E
RIGHT → RIGHT_E
LEFT → LEFT_E
LIMIT → LIMIT_E
DLIMIT → LIMIT_E
BOOL_TO_STR → BOOL_TO_STRING 
BOOL_TO_STR_E → BOOL_TO_STRING_E 
INT_TO_STR → INT_TO_STRING 
INT_TO_STR_E → INT_TO_STRING_E 
DINT_TO_STR → DINT_TO_STRING 
DINT_TO_STR_E → DINT_TO_STRING_E 
REAL_TO_STR → REAL_TO_STRING 
REAL_TO_STR_E → REAL_TO_STRING_E 
STR_TO_BOOL → STRING_TO_BOOL 
STR_TO_BOOL_E → STRING_TO_BOOL_E 
STR_TO_INT → STRING_TO_INT 
STR_TO_INT_E → STRING_TO_INT_E 
STR_TO_DINT → STRING_TO_DINT 
STR_TO_DINT_E → STRING_TO_DINT_E 
STR_TO_REAL → STRING_TO_REAL 
STR_TO_REAL_E → STRING_TO_REAL_E 
STR_TO_TIME → STRING_TO_TIME 
STR_TO_TIME_E → STRING_TO_TIME_E 
TIME_TO_STR → TIME_TO_STRING 
TIME_TO_STR_E → TIME_TO_STRING_E 
MAXIMUM → MAX 
MAXIMUM_E → MAX_E 
MINIMUM → MIN 
MINIMUM_E → MIN_E 
LIMITATION → LIMIT 
LIMITATION_E → LIMIT_E 

*1 For GX Works3 version 1.032J and later, the instructions will be replaced when a timer device is assigned to the global label.

4 Conversion of the Projects

42 4.2 Precautions when Converting the Projects
*2 These instructions are supported by GX Works3 version 1.040S and later.

■Instructions that are not supported by GX Works3

The following instructions are not supported by GX Works3. The instructions are left as is when converting the projects, but an
error will occur when compiling.
Instruction list
OUT_C_32 REFFP DTBL FLCRT
STL PLSR ZRN FLDEL
RET DPLSR DZRN FLWR
CJ TKY RD3A FLRD
CJP DTKY RD3AP FLCMD
CALL HKY WR3A FLSTRD
CALLP
SRET
DHKY
ARWS
WR3AP
COMRD
GET_BIT_OF_INT
GET_BIT_OF_INT_E
4
IRET ASC COMRDP SET_BIT_OF_INT
FEND PR DHSCT SET_BIT_OF_INT_E
ROR RS SAVER CPY_BIT_OF_INT
DROR VRRD INITR CPY_BIT_OF_INT_E
ROL VRRDP INITRP
DROL VRSC LOGR
REFF VRSCP LOGRP

Precautions
Even if the instructions are supported by GX Works3, a conversion error may occur due to the difference of the setting range
of FX3U/FX3UC.
Instructions/FB/FUN that are not supported by the FBD/LD program will be undefined instructions/FB/FUN.

Instruction Replacement List of ST Programs

■Replaced instructions
The following instructions will be replaced to GX Works3 compatible instructions when converting the project.
FX3 Series → MELSEC iQ-F Remarks
OUT_T → OUT_T, OUTH, OUTHS When a label is used instead of a
• When the timer is 1 ms, it will be timer device, the instructions will not
replaced to the OUTHS instruction. be replaced.*1
• When the timer is 10 ms, it will be
replaced to the OUTH instruction.
• When the timer is 100 ms, it will be
replaced to the OUT_T instruction.
SQRP → SQRTP 
DSQR → DSQRT 
DSQRP → DSQRTP 
SER → SERMM 
SERP → SERMMP 
DSER → DSERMM 
DSERP → DSERMMP 
RAMP → RAMPF 
SORT → SORTTBL 
HEX → HEXA 
HEXP → HEXAP 
SORT2 → SORTTBL2 
DSORT2 → DSORTTBL2 
HOUR → HOURM 
DHOUR → DHOURM 

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 43
 FX3 Series → MELSEC iQ-F Remarks
IVCK → IVCK SM4095 is added to parameters of
instructions. Change to an
IVDR → IVDR
appropriate device or label.
IVRD → IVRD
IVWR → IVWR
IVBWR → IVBWR
IVMC → IVMC
ADPRW → ADPRW
LOADR → ERREAD*2 
LOADRP → ERREAD*2 
RWER → ERWRITE*2 
*2
RWERP → ERWRITE 
INITER → ERINIT*2 
*2
INITERP → ERINIT 
SQR → SQRT_E These instructions will be converted
to standard functions.
LEN → LEN_E
RIGHT → RIGHT_E
LEFT → LEFT_E
LIMIT → LIMIT_E
DLIMIT → LIMIT_E
BOOL_TO_STR → BOOL_TO_STRING 
BOOL_TO_STR_E → BOOL_TO_STRING_E 
INT_TO_STR → INT_TO_STRING 
INT_TO_STR_E → INT_TO_STRING_E 
DINT_TO_STR → DINT_TO_STRING 
DINT_TO_STR_E → DINT_TO_STRING_E 
REAL_TO_STR → REAL_TO_STRING 
REAL_TO_STR_E → REAL_TO_STRING_E 
STR_TO_BOOL → STRING_TO_BOOL 
STR_TO_BOOL_E → STRING_TO_BOOL_E 
STR_TO_INT → STRING_TO_INT 
STR_TO_INT_E → STRING_TO_INT_E 
STR_TO_DINT → STRING_TO_DINT 
STR_TO_DINT_E → STRING_TO_DINT_E 
STR_TO_REAL → STRING_TO_REAL 
STR_TO_REAL_E → STRING_TO_REAL_E 
STR_TO_TIME → STRING_TO_TIME 
STR_TO_TIME_E → STRING_TO_TIME_E 
TIME_TO_STR → TIME_TO_STRING 
TIME_TO_STR_E → TIME_TO_STRING_E 
MAXIMUM → MAX 
MAXIMUM_E → MAX_E 
MINIMUM → MIN 
MINIMUM_E → MIN_E 
LIMITATION → LIMIT 
LIMITATION_E → LIMIT_E 

*1 For GX Works3 version 1.032J and later, the instructions will be replaced when a timer device is assigned to the global label.
*2 These instructions are supported by GX Works3 version 1.040S and later.

4 Conversion of the Projects

44 4.2 Precautions when Converting the Projects
■Instructions that are not supported by GX Works3
The following instructions are not supported by GX Works3. The instructions are left as is when converting the projects, but an
error will occur when compiling.
Instruction list
OUT_C_32 DPLSR INTP INITR
IRET TKY DINT INITRP
FEND DTKY DINTP LOGR
ROR HKY DTBL LOGRP
DROR DHKY ZRN FLCRT
ROL ARWS DZRN FLDEL
DROL ASC RD3A FLWR
FLT PR RD3AP FLRD
4
FLTP RS WR3A FLCMD
DFLT VRRD WR3AP FLSTRD
DFLTP VRRDP COMRD MOD
REFF VRSC COMRDP
REFFP VRSCP DHSCT
PLSR INT SAVER

Precautions
Even if the instructions are supported by GX Works3, a conversion error may occur due to the difference of the setting range
of FX3U/FX3UC.
When a character string constant is used in the GX Works2 program, be aware of the following points.
• When the character string is enclosed with a double quotation (”), it will be replaced with a single quotation (’).
• When using a (’) and (”) in the character string constant of GX Works3, it must be input as ($’) and ($”).

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 45
 Precautions for Instruction Replacement
When converting the projects of the FX3 Series to MELSEC iQ-F projects, the instructions may be changed or correction
required. The details are explained below.

Arguments
■Arguments of function with "_E"
For functions with “_E”, the positions of the arguments are different between GX Works2 and GX Works3. Therefore the
projects must be modified after conversion.
• GX Works2: EN is specified by the first argument and "ENO" is the return value.
• GX Works3: EN is specified by the first argument, ENO is specified by the second argument, and the result is the return
value. (The value is the same as function without "_E".)

■Data type of arguments

The required data type of arguments for some instructions, functions, function blocks of GX Works2, and the required data
type of arguments for the instructions, functions, function blocks of GX Works3 are different. Therefore, an error may occur
because of data type mismatch when reusing the program of GX Works2. In that case, modify the instruction name or
arguments.

Ex.
INC instruction
• When handling a value exceeding 32767 (maximum value of word [signed]), replace to “INC_U”.
• When word [unsigned]/bit array [16-bit] type label is specified for the parameter, replace to “INC_U”.

■The number and order of arguments

The number and order of arguments of some instructions in GX Works2 is different from those of GX Works3. In that case,
modify the arguments.

Ex.
(D)TO instruction
• GX Works2: (S)(n1)(n2)(n3)
• GX Works3: (UnHn)(s1)(s2)(n)
When the order of the arguments in GX Works2 is 1, 2, 3, and 4, the order in GX Works3 is 2, 3, 1, and 4.

■Argument requiring multiple points

When using a label as an argument that requires multiple points, use an array label having at least as many elements as
required of the argument.

Instructions/FB/FUN that are not supported by the MELSEC iQ-F Series

For the instructions/FB/FUN that are not supported by the MELSEC iQ-F Series, refer to the following manual to correct the
program so that the instructions/FB/FUN will be equivalent to the one in the manual.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Block)

Instructions Requiring Special Action When Replacing Structured Ladder to FBD/LD

Instructions
The following instructions require action after the project conversion.
Instruction list Action content
DHSCR DSWAP PLSV The connecting position of the parameter is different from GX
Works2.
PLSY DSWAPP DPLSV
After replacing to FX5, select the appropriate instruction and
DPLSY DSZR DRVI perform “Edit”→”FB/FUN update” in the right-click menu, and
PWM DVIT DDRVI then adjust the connecting position.

SWAP DDVIT DRVA

SWAPP DABS DDRVA
DHSCS_I When an out of range “I” device is specified as parameter “i”,
parameter “i” will be replaced with P4095.

4 Conversion of the Projects

46 4.2 Precautions when Converting the Projects
Correction of structured ladder/FBD program
• The method of thinking for execution order is different for the GX Works2 structured ladder/FBD and GX Works3 FBD/LD
language. Display the execution order and check the contents.
• The operation of the return element is different for the GX Works2 structured ladder/FBD and GX Works3 FBD/LD
language. For details of the return element of GX Works3, refer to the following.
GX Works3 Operating Manual
• For the GX Works2 structured ladder/FBD and GX Works3 FBD/LD language, there are different cases in the input/output
parameter numbers of the function parts/function block parts and the order. In this case, it will be displayed as an undefined
FB/FUN. Select [Edit]→[FB/FUN update] to update the definition information, and correct the program.
• When the program is made to refer to a standard FB member in the GX Works2 structured ladder/FBD, a conversion error
may occur after opening with GX Works3. In this case, check the member name and class of the standard FB, and correct
the program.
4
• For the GX Works3 FBD/LD language, the input/output parameter of the function parts/function block elements can only be
inverted. When elements other than the above are inverted for GX Works2 structured ladder/FBD, the connecting line of
that element will be deleted. Correct the program so that the operation will be equal to GX Works2 structured ladder/FBD.
• For the GX Works3 FBD/LD language, the wired OR of the FBD elements are not supported. Correct the program so that
the operation will be equal to GX Works2 structured ladder/FBD, or a conversion error will occur.
• When using the pointer branch instructions (CJ), jump, and sub routine program, a conversion error may occur. For details,
refer to the following.
MELSEC iQ-F FX5 Programming Manual (Program Design)
• According to the difference of the GX Works2 structured ladder/FBD editor and GX Works3 FBD/LD editor, the layout of the
program may change. Correct the layout appropriately.
• Ladder block label used in the GX Works2 structured ladder/FBD will be defined as a pointer type in local label.
• For GX Works3 FBD/LD language, the timer and counter device cannot reset by coil. Use the RST instruction.
• When the output of a function that executes on a pulse is connected to the input of another function, an error occurs.
Receive the output by a device or label and then connect to the input.

Instructions Requiring Special Action When Replacing Instructions of ST programs

The following instructions require settings after the project conversion.
FX3 Series → MELSEC iQ-F Action content
DHSCS_I → DHSCS_I When an out of range “I” device is specified as the fourth
parameter, it will be replaced with OUT instructions.

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 47
 Device Replacement List
The following describes the device list when replacing the FX3U/FX3UC projects to MELSEC iQ-F projects.
Actions such as replacing the device will be necessary according to the content of precautions.
Device name FX3U/FX3UC After replacing to Precautions
MELSEC iQ-F
Input relay X0 to X367 X0 to X367 
Output relay Y0 to Y367 Y0 to Y367 
Auxiliary relay For general use M0 to M499 M0 to M499 
For keep*1 M500 to M7679 M500 to M7679 
For special use M8000 to M8511 SM0 to SM8511 Refer to Page 50 SM/SD Device
Replacement.
State For initial state S0 to S9 S0 to S9 
For general use S10 to S499 S10 to S499 
For keep*1 S500 to S4095 S500 to S4095 
For annunciator (when using ANS S900 to S999 ANS F900 to F999 If necessary, replace the device number.
ANS instructions) (When the ANS instruction is not used, but
it is used as an annunciator, replacement to
For annunciator (when not S900 to S999 S900 to S999
the F device is necessary.)
using ANS instructions)
Timer 100 ms OUT T OUT T 
T0 to T191 T0 to T191
100 ms OUT T OUT T The routine timer must be set by the
Routine timer T192 to T199 T192 to T199 parameter. (Refer to Page 53
Precautions when Using the Routine
Timer.)
10 ms OUT T OUTH T 
T200 to T245 T200 to T245
1 ms accumulated type OUT T OUTHS ST 
T246 to T249 ST0 to ST3
100 ms accumulated type OUT T OUT ST 
T250 to T255 ST4 to ST9
1 ms OUT T OUTHS T 
T256 to T511 T256 to T511
Contact TS0 to TS245 and TS256 to TS0 to TS245 and TS256 to 
TS511 TS511
TS246 to TS255 STS0 to STS9
Coil TC0 to TC245 and TC256 to TC0 to TC245 and TC256 to 
TC511 TC511
TC246 to TC255 STC0 to STC9
Current value TN0 to TN245 and TN256 to TN0 to TN245 and TN256 to 
TN511 TN511
TN246 to TN255 STN0 to STN9
Counter 16-bit up counter for general C0 to C99 C0 to C99 
use
16-bit up counter for keep*1 C100 to C199 C100 to C199 
32-bit bidirectional counter C200 to C219 LC0 to LC19 
for general use
32-bit bidirectional counter C220 to C234 LC20 to LC34 
for keep*1
Contact CS0 to CS199 CS0 to CS199 
CS200 to CS234 LCS0 to LCS34 
Coil CC0 to CC199 CC0 to CC199 
CC200 to CC234 LCC0 to LCC34 
Current value CN0 to CN199 CN0 to CN199 
CN200 to CN234 LCN0 to LCN34 

4 Conversion of the Projects

48 4.2 Precautions when Converting the Projects
Device name FX3U/FX3UC After replacing to Precautions
MELSEC iQ-F
High-speed 1-phase 1-count input C235 to C245 C235 to C245 Setting of the FX3 Series compatibility
counter assignment and replacement of the device
1-phase 2-count input C246 to C250 C246 to C250
number are necessary by the parameter.
2-phase 2-count input C251 to C255 C251 to C255 (Refer to Page 51 Precautions when
Using the High-speed Counters.)
Contact CS235 to CS255 CS235 to CS255 
Coil CC235 to CC255 CC235 to CC255 
Current value CN235 to CN255 CN235 to CN255 
Data register For general use D0 to D199 D0 to D199 
*1
For keep D200 to D7999 D200 to D7999 
For special use D8000 to D8511 SD0 to SD8511 Refer to Page 50 SM/SD Device
Replacement. 4
File register File register  Substitution is possible by using the device
D1000 to D7999 initial value function.
Index register 16-bit Z device Z0 to Z7 Z0 to Z7 
16-bit V device V0 to V7 Z10 to Z17 
32-bit Z device (at Z0 to Z7 Z0 to Z7 If necessary, replace the direct value
modification of direct value) modification to the LZ device.
Extension register R0 to R32767 R0 to R32767 The battery mode setting is necessary.*2
Extension file register ER0 to ER32767 ER0 to ER32767*6 Replaced to OUT SM4095.*6
Pointer Normal pointer P0 to P4095 (except P63) P0 to P4095 (except P63) 
END pointer P63 GOEND 
Interrupt Input interrupt (delay I00 I0 to I15 Replaced as follows.*4
pointer*3 interrupt) I10 I00→I0
I20 I10→I1
I30 I20→I2
I40 I30→I3
I50 I40→I4
I50→I5
=1: Rise interrupt
=0: Fall interrupt
When  is 2 to 9, it will be replaced with
P4095.
Timer interrupt I6 I28 to I31 Replaced as follows.*5
I7 I6→I28
I8 I7→I29
I8→I30
=1 to 99: Timer value
Counter interrupt I010 I16 to I21 Replaced as follows.
I020 I010→I16
I030 I020→I17
I040 I030→I18
I050 I040→I19
I060 I050→I20
I060→I21
Module access device Module number (0 to 7) Module number (1 to 16) The module number will be replaced
BFM number (0 to 32766) BFM number (0 to 65535) increasing by +2.*7
Decimal constant 16-bit: K-32,768 to K32,767 16-bit: K-32,768 to K32,767 
32-bit: K-2,147,483,648 to 32-bit: K-2,147,483,648 to
K2,147,483,647 K2,147,483,647
Hexadecimal constant 16-Bit: H0 to HFFFF 16-Bit: H0 to HFFFF 
32-Bit: H0 to HFFFFFFFF 32-Bit: H0 to HFFFFFFFF
Real constant -1.0×2128 to -1.0×2-126, 0, -1.0×2128 to -1.0×2-126, 0, 
1.0×2-126 to 1.0×2128 1.0×2-126 to 1.0×2128
Character string constant 32 single-byte characters 255 single-byte characters 

*1 When the latch range of the device for keep of the FX3 Series is changed, the latch range must be changed.
*2 Set the parameter at [Parameter] →[FX5UCPU] → [CPU Parameter] → [Memory/Device Setting] → “Option Battery Setting” in [Device/
Label Memory Area Setting].
*3 Set the interrupt setting by the parameter accordingly.
*4 The parameter is reflected at [Parameter] → [FX5UCPU] → [Module Parameter] → [High Speed I/O] → [Input Function] → [General/
Interrupt/Pulse Catch]. Also, the parameter is reflected to [Module Parameter] →[Input Response Time].
*5 The parameter is reflected at [Parameter] →[FX5UCPU] → [CPU Parameter] → [Interrupt Settings] → [Fixed Interval Setting].

4 Conversion of the Projects

4.2 Precautions when Converting the Projects 49
 *6 For GX Works3 version 1.040S and later, the device number will be replaced with the numbers ranging from ER0 to ER32767.
*7 For GX Works3 version 1.040S and later, the conversion method can be selected. (Page 33 Operation Method for Replacing
Projects)

Precautions for Device Replacement

Precautions for Device Replacement

Index modification of the S device (state) cannot be made on the MELSEC iQ-F. Replace as follows.
• When the S device without state management has its index modified, replace to M device to use.
• When the S device used for state management has its index modified and used for the ZRST instructions, program the
ZRST instructions for each batch-clear pattern.
For GX Works3 whose version is earlier than 1.030G, the assigned device of the global label cannot be read out.
• Information of the assigned device in GX Works2 is input in the comment field. Refer to the comment field to assign the
device again.
• When special M and special D have been assigned, they will be replaced and assigned to SM and SD.
If S device is set to the device memory data or device initial data created using GX Works2, it will be deleted.
If there is a device that is not supported by the MELSEC iQ-F Series in the program created using GX Works2, the device will
be changed to SM4095/SD4095.
The default value is set to the parameter setting of device points.

SM/SD Device Replacement

Devices, M8000 and later and D8000 and later of FX3U/FX3UC, will be changed to devices, SM8000 and later and SD8000
and later. However, some devices may be changed depending on the version of GX Works3. For details, refer to the following.
FX3U/ After replacing to MELSEC iQ-F FX3U/ After replacing to MELSEC iQ-F
FX3UC GX Works3 version GX Works3 version FX3UC GX Works3 version GX Works3 version
1.032J and earlier 1.035M and later 1.032J and earlier 1.035M and later
M8004 SM8004 SM0 M8240 SM8240 SM4585
M8009 SM8009 SM0 M8241 SM8241 SM4580
M8061 SM8061 SM0 M8242 SM8242 SM4582
M8064 SM8064 SM0 M8243 SM8243 SM4584
M8065 SM8065 SM0 M8244 SM8244 SM4580
M8066 SM8066 SM0 M8245 SM8245 SM4582
M8091 SM8091 SM701 M8318 SM8318 SM0
M8131 SM8131 SM5001 M8489 SM8489 SM0
M8133 SM8133 SM5001 D8004 SD8004 SD0
M8138 SM8138 SM5001 D8009 SD8009 SD0
M8139 SM8139 SM5000 D8061 SD8061 SD0
M8165 SM8165 SM703 D8064 SD8064 SD0
M8235 SM8235 SM4580 D8065 SD8065 SD0
M8236 SM8236 SM4581 D8066 SD8066 SD0
M8237 SM8237 SM4582 D8101 SD8101 SD8001
M8238 SM8238 SM4583 D8166 SD8166 SD83
M8239 SM8239 SM4584 D8489 SD8489 SD0

4.3 Precautions when Replacing the Parameters

When converting projects of the FX3 Series to MELSEC iQ-F projects, the setting data of the parameters (PLC parameter and
network parameter) and special module (intelligent function module) will be deleted. Therefore, it is necessary to reset the
data with GX Works3.
Also, GX Works3 does not support the following parameters of FX3 Series, so it is necessary to set with GX Works3 again.
• Network parameter (CC-Link)*1
• Intelligent function module parameter (AnyWireASLINK)
*1 For GX Works3 version 1.040S and later, the decision can be made to take over the network parameter (CC-Link) or not.

4 Conversion of the Projects

50 4.3 Precautions when Replacing the Parameters
4.4 Precautions when Replacing Other Functions
Precautions when Using the High-speed Counters
When the high-speed counters (C235 to C255) are used with FX3U/FX3UC, it will not operate by just replacing to MELSEC
iQ-F. It is necessary to set the FX3 Series compatible high-speed counters and change the program by the parameter. For the
setting procedure, refer to the following.

Parameter Setting Procedure of the FX3 Series Compatible High-speed Counters

1. Select “Long Counter Specification” at the specification for High-speed counters.
[Parameter]  [FX5UCPU]  [Module Parameter]  [High Speed I/O]  “Input Function”  “High Speed Counter”  4
“Detailed Setting”  “Other”

4 Conversion of the Projects

4.4 Precautions when Replacing Other Functions 51
 2. Set the function of the high-speed counters used at FX3U/FX3UC.
Select the input comparison enable/disable of the counter device and preset input compatible with the FX3 Series, and select
the control switch.

Changing the Program

Change the high-speed counter program by referring to the following program example.
[Example of program]
K10000
M0
C235

C235
Y001

Change to

M0
UDCNTF LC35 K10000

LC35
Y001

4 Conversion of the Projects

52 4.4 Precautions when Replacing Other Functions
Precautions when Using the Routine Timer
When the routine timer (T192 to T199) is used with FX3U/FX3UC, it will not operate by just replacing to MELSEC iQ-F.
The routine timer must be set by the parameter. For the setting procedure, refer to the following.

Parameter Setting Procedure of the Routine Timer

1. Set the use of the routine timer and the leading device number.
[Parameter]  [FX5UCPU]  [CPU Parameter]  “Memory/Device Setting”  “Device/Label Memory Area Setting”

4 Conversion of the Projects

4.4 Precautions when Replacing Other Functions 53
 INDEX

A
Auxiliary relay . . . . . . . . . . . . . . . . . . . . . . . . . . 48

C
Character string constant . . . . . . . . . . . . . . . . . . 49
Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

D
Data register . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Decimal constant . . . . . . . . . . . . . . . . . . . . . . . 49

E
Extension file register . . . . . . . . . . . . . . . . . . . . 49
Extension register . . . . . . . . . . . . . . . . . . . . . . . 49

H
Hexadecimal constant . . . . . . . . . . . . . . . . . . . . 49
High-speed counter . . . . . . . . . . . . . . . . . . . . . . 49

I
Index register . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Input hardware filter . . . . . . . . . . . . . . . . . . . 23,30
Input relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Input signal current . . . . . . . . . . . . . . . . . . . . 23,30
Interrupt pointer . . . . . . . . . . . . . . . . . . . . . . . . 49

M
Module access device . . . . . . . . . . . . . . . . . . . . 49

O
Output relay . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

P
Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

R
Real constant . . . . . . . . . . . . . . . . . . . . . . . . . . 49

S
State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

T
Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

54
MEMO

55
 REVISIONS
Revision date Revision Description
December 2015 A First edition
May 2016 B ■Added models
FX5U-32MR/DS, FX5U-32MT/DS, FX5U-32MT/DSS, FX5U-64MR/DS, FX5U-64MT/DS, FX5U-
64MT/DSS, FX5U-80MR/DS, FX5U-80MT/DS, FX5U-80MT/DSS, FX5-32ER/DS, FX5-32ET/DS,
FX5-32ET/DSS, FX5-CNV-IF, FX5-30EC, FX5-65EC, and FX5-CNV-BC
■Added and revised parts
RELEVANT MANUALS, TERMS, Section 2.3, 3.3, 4.1, and 4.2
October 2016 C ■Added models
FX5-4AD-PT-ADP, FX5-4AD-TC-ADP, FX5-16ER/ES, FX5-16ET/ES, and FX5-16ET/ESS
■Added and revised parts
RELEVANT MANUALS, TERMS, Section 2.3, 3.3, and 4.2
April 2017 D ■Added models
FX5-8AD, FX5-4LC, FX5-20PG-P, FX5-CCL-MS
■Added and revised parts
SAFETY PRECAUTIONS, RELEVANT MANUALS, TERMS, Section 2.3, 3.3, 4.2
October 2017 E ■Added models
FX5-4AD, FX5-4DA, FX5-C32EX/DS-TS
■Added and revised parts
RELEVANT MANUALS, TERMS, Section 2.3, 3.3, 4.1, 4.2, 4.3
October 2018 F ■Added models
FX5-20PG-D, FX5-DP-M
■Added and revised parts
RELEVANT MANUALS, TERMS, Sections 2.3, 3.3

This manual confers no industrial property rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held
responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual.

2015 MITSUBISHI ELECTRIC CORPORATION

56
WARRANTY
Please confirm the following product warranty details before using this product.
1. Gratis Warranty Term and Gratis Warranty 2. Onerous repair term after discontinuation
Range of production
If any faults or defects (hereinafter "Failure") found to (1) Mitsubishi shall accept onerous product repairs for
be the responsibility of Mitsubishi occurs during use of seven (7) years after production of the product is
the product within the gratis warranty term, the discontinued.
product shall be repaired at no cost via the sales Discontinuation of production shall be notified with
representative or Mitsubishi Service Company. Mitsubishi Technical Bulletins, etc.
However, if repairs are required onsite at domestic or (2) Product supply (including repair parts) is not
overseas location, expenses to send an engineer will available after production is discontinued.
be solely at the customer's discretion. Mitsubishi shall
not be held responsible for any re-commissioning,
3. Overseas service
maintenance, or testing on-site that involves Overseas, repairs shall be accepted by Mitsubishi's
replacement of the failed module. local overseas FA Center. Note that the repair
conditions at each FA Center may differ.
[Gratis Warranty Term] 4. Exclusion of loss in opportunity and
The gratis warranty term of the product shall be for secondary loss from warranty liability
one year after the date of purchase or delivery to a Regardless of the gratis warranty term, Mitsubishi
designated place. Note that after manufacture and shall not be liable for compensation to:
shipment from Mitsubishi, the maximum distribution (1) Damages caused by any cause found not to be
period shall be six (6) months, and the longest gratis the responsibility of Mitsubishi.
warranty term after manufacturing shall be eighteen (2) Loss in opportunity, lost profits incurred to the
(18) months. The gratis warranty term of repair parts user by Failures of Mitsubishi products.
shall not exceed the gratis warranty term before (3) Special damages and secondary damages
repairs. whether foreseeable or not, compensation for
accidents, and compensation for damages to
[Gratis Warranty Range] products other than Mitsubishi products.
(4) Replacement by the user, maintenance of on-site
(1) The range shall be limited to normal use within the
equipment, start-up test run and other tasks.
usage state, usage methods and usage
environment, etc., which follow the conditions and 5. Changes in product specifications
precautions, etc., given in the instruction manual, The specifications given in the catalogs, manuals or
user's manual and caution labels on the product. technical documents are subject to change without
(2) Even within the gratis warranty term, repairs shall prior notice.
be charged for in the following cases. 6. Product application
1. Failure occurring from inappropriate storage or (1) In using the Mitsubishi MELSEC programmable
handling, carelessness or negligence by the controller, the usage conditions shall be that the
user. Failure caused by the user's hardware or application will not lead to a major accident even if
software design. any problem or fault should occur in the
2. Failure caused by unapproved modifications,
programmable controller device, and that backup
etc., to the product by the user.
and fail-safe functions are systematically provided
3. When the Mitsubishi product is assembled into
outside of the device for any problem or fault.
a user's device, Failure that could have been
avoided if functions or structures, judged as (2) The Mitsubishi programmable controller has been
necessary in the legal safety measures the designed and manufactured for applications in
user's device is subject to or as necessary by general industries, etc. Thus, applications in which
industry standards, had been provided. the public could be affected such as in nuclear
4. Failure that could have been avoided if power plants and other power plants operated by
consumable parts (battery, backlight, fuse, respective power companies, and applications in
etc.) designated in the instruction manual had which a special quality assurance system is
been correctly serviced or replaced. required, such as for railway companies or public
5. Relay failure or output contact failure caused service purposes shall be excluded from the
by usage beyond the specified life of contact programmable controller applications.
(cycles). In addition, applications in which human life or
6. Failure caused by external irresistible forces property that could be greatly affected, such as in
such as fires or abnormal voltages, and failure aircraft, medical applications, incineration and fuel
caused by force majeure such as earthquakes, devices, manned transportation, equipment for
lightning, wind and water damage. recreation and amusement, and safety devices,
7. Failure caused by reasons unpredictable by shall also be excluded from the programmable
scientific technology standards at time of controller range of applications.
shipment from Mitsubishi. However, in certain cases, some applications may
8. Any other failure found not to be the be possible, providing the user consults their local
responsibility of Mitsubishi or that admitted not Mitsubishi representative outlining the special
to be so by the user. requirements of the project, and providing that all
parties concerned agree to the special
circumstances, solely at the user's discretion.

57
 TRADEMARKS
Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or
other countries.
Ethernet is a trademark of Xerox Corporation.
PROFIBUS is a trademark of PROFIBUS Nutzerorganisation e.V.
Anywire and ANYWIREASLINK are registered trademarks of the Anywire Corporation.
MODBUS is a registered trademark of Schneider Electric SA.
Phillips is a registered trademark of Phillips Screw Company.
SD logo and SDHC logo are trademarks or registered trademarks of SD-3C, LLC.

The company name and the product name to be described in this manual are the registered trademarks or trademarks of
each company.

58
Manual number: JY997D66201F

When exported from Japan, this manual does not require application to the
Ministry of Economy, Trade and Industry for service transaction permission.

HEAD OFFICE: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Specifications are subject to change without notice.