Programmable Controllers
MELSEC-F SERIES
Rich features and flexible system configuration in a compact size.
The MELSEC-F series PLC incorporates power supply, CPU, and I/Os into a single compact unit.
Meets the needs of a variety of user applications with options for I/O, analog, positioning, and open network expansion.

MELSEC-F series
FX PLC Main Unit
A wide
lineup in FX series offers you many choices to fit to your budget and
application.
You are sure to find a model that fulfills your needs.
Explanation of the icons
Depending on control points, total 256 I/O
extension devices can be connected.
*Includes CC-Link remote I/O
FX3U/FX3UC can count at high speed input
frequency 100kHz (1-phase 6pts), 50kHz (2-phase 2pts), 10kHz (1-phase 2pts).
Depending on control points, total 384 I/O
extension devices can be connected.
*Includes CC-Link remote I/O
FX3S/FX3GC has 2 axes simple positioning
function built into the main unit.
Depending on the purpose, various special
function blocks can be connected.
FX3G/FX3U/FX3UChas 3 axes simple
positioning built into the main unit.
*FX3G 14 pt, 24 pt models have independent 2 axes.
Function can be easily added by mounting a
function expansion board to the main unit.
I/O can be connected in connector format,
reducing wiring effort.
In FX3UC-32MT-LT, CC-Link/LT master
functionality is built-in.
1 phase: 60 kHz x 4 pts/ 10 kHz x 2
pts 2 phase: 30 kHz x 2 pts/ 5 kHz 1 pt

1 phase: 60 kHz x 2 pts/ 10 kHz x 4
pts 2 phase: 30 kHz x 1 pt/ 5 kHz 1 pt
In FX3S-30MR/ES-2AD, FX3S-30MT/ES-2AD, and
FX3S-30MT/ESS-2AD, 2ch analog input (current input) function is built-in.
You are sure to find a model that fulfills your needs.
Explanation of the icons
Depending on control points, total 256 I/O
extension devices can be connected.
*Includes CC-Link remote I/O
FX3U/FX3UC can count at high speed input
frequency 100kHz (1-phase 6pts), 50kHz (2-phase 2pts), 10kHz (1-phase 2pts).
Depending on control points, total 384 I/O
extension devices can be connected.
*Includes CC-Link remote I/O
FX3S/FX3GC has 2 axes simple positioning
function built into the main unit.
Depending on the purpose, various special
function blocks can be connected.
FX3G/FX3U/FX3UChas 3 axes simple
positioning built into the main unit.
*FX3G 14 pt, 24 pt models have independent 2 axes.
Function can be easily added by mounting a
function expansion board to the main unit.
I/O can be connected in connector format,
reducing wiring effort.
In FX3UC-32MT-LT, CC-Link/LT master
functionality is built-in.
1 phase: 60 kHz x 4 pts/ 10 kHz x 2
pts 2 phase: 30 kHz x 2 pts/ 5 kHz 1 pt
1 phase: 60 kHz x 2 pts/ 10 kHz x 4
pts 2 phase: 30 kHz x 1 pt/ 5 kHz 1 pt
In FX3S-30MR/ES-2AD, FX3S-30MT/ES-2AD, and
FX3S-30MT/ESS-2AD, 2ch analog input (current input) function is built-in.
Main Unit
All-in-one power supply, CPU, and I/O main unit. Built-in features include high-speed counters and positioning outputs.
I/O Extension
Both [I/O Extension Units] with a built-in
power supply and [I/O Extension Blocks] without a power supply are available in
various I/O sizes and configurations.
Analog Control
Options for analog inputs and outputs,
temperature sensor inputs, and temperature control are available.
High-Speed Counting
Options are available to increase the performance of the built-in high-speed counters or provide additional high-speed counting capacity.
Positioning Control
High-speed pulse output as well as SSCNETIII
positioning options are available.
Network/Communication
Expansion options for CC-Link and Ethernet networks
as well as RS-232C and RS-485 serial communication protocols are available.
Option
Lineup of cables and signal converters as well
as training software.
Allied products
A variety of partner products compatible with
the MELSEC-FX Series are available.
FX3S |
FX3G/FX3GC |
FX3U/FX3UC |
|
Lineup |
FX3S: 27 models |
FX3G: 24 models |
FX3U: 37 models |
Control method |
Stored program cyclic operation |
||
I/O control mode |
Refresh mode |
||
Programming language |
Ladder diagram |
||
Engineering
environment |
MELSOFT GX Works2 |
||
Program size (K
step) |
4 |
32 |
64 |
Number of I/O points
[X/Y] (point) |
30 |
128 |
256 |
Device/label memory/
standard RAM (K byte) |
— |
— |
— |
Data memory/
standard ROM (byte) |
— |
— |
— |
Processing speed |
|||
LD instruction (ns) |
210 |
210 |
65 |
MOV instruction (ns) |
520 |
520 |
640 |
Floating point
addition (µs) |
11.96 |
11.96 |
14.2 |
Memory interface |
|||
Extended SRAM
cassette |
● |
●*11 |
● |
SD memory card |
— |
— |
— |
SRAM card, FLASH
card, ATA card |
— |
— |
— |
External interface |
|||
USB |
● |
● |
●*14 |
Ethernet |
— |
— |
— |
RS-232 |
● |
● |
● |
RS-422/485 |
● |
● |
● |
Display unit |
● |
●*11 |
● |
CC-Link IE
connection port |
|||
Ethernet |
— |
— |
— |
Network connectivity
(adapter/module) |
|||
Ethernet |
● |
● |
● |
CC-Link IE Control |
— |
— |
— |
CC-Link IE Field |
— |
— |
— |
CC-Link |
— |
● |
● |
CC-Link/LT |
— |
● |
● |
SSCNET Ⅲ/H |
— |
— |
●*16 |
AnyWire |
— |
● |
● |
BACnet™ |
— |
— |
— |
MODBUS®/TCP |
— |
— |
— |
MODBUS® |
● |
● |
● |
General
specifications/conformed standards |
|||
Operating ambient
temperature |
0...55℃ |
0...55℃ |
0...55℃ |
International safety
standards |
— |
— |
— |
Standard on
corrosive atmosphere |
— |
— |
— |
CE: Council
Directive of the European Communities |
● |
● |
● |
UL: Underwriters
Laboratories Listing |
● |
● |
● |
LR: Lloyd's Register
of Shipping approval |
● |
● |
● |
DNV: Norwegian
Maritime approval |
● |
● |
● |
RINA: Italian
Maritime approval |
● |
● |
● |
NK: ClassNK approval |
● |
● |
● |
ABS: American Bureau
of Shipping approval |
● |
● |
● |
BV: Bureau Veritas
approval |
● |
● |
● |
GL: Germanischer
Lloyd approval |
● |
● |
● |
Key
features/functions |
Machine control |
*1: Supports redundant
system when paired with R6RFM
*2: SFC is not supported in redundant mode and by safety CPU
*3: Q□UDVCPU only
*4: When using CW Workbench
*5: Does not support QnUDVCPU and certain models
*6: Does not support L02SCPU(-P)
*7: Supports the user Ethernet port of Q24DHCCPU-V/VG/LS and Q26DHCCPU-LS only
*8: Supports Q□UDE(H)CPU and Q□UDVCPU only
*9: Does not support Q□UDE(H)CPU and Q□UDVCPU
*10: Supports L02SCPU(-P) only
*11: Supports FX3G only
*12: R□ENCPU only
*13: Supports the MELSEC iQ-R Series only.
*14: Supported by expansion board
*15: Does not support Q□(P)(H)CPU and Q□PRHCPU
*16: Supports SSCNET Ⅲ
*17: Only supported when used together with extended temperature range
main/extension base units
*18: R□SFCPU-SET only.
*19: For protection against aggressive atmosphere and gases, products with a
conformal coating (JIS C 60721-3-3/IEC 60721-3-3 Class 3C2) are available on
request
*20: Operating ambient temperature from -20℃ is supported by products produced from June
2016 (serial number "166" or later). For details, on supported
products, please refer to the relevant product manual.
·
MELSEC
F series selection tool
·
Product Comparison
Series |
Compact type |
Compact type |
||
|
|
|||
Programmable controller CPU |
Programmable controller CPU |
|||
FX5U/FX5UC |
FX3S |
FX3G/FX3GC |
FX3U/FX3UC |
|
Lineup |
FX5U (Screw terminal
type): 12 models |
FX3S: 27 models |
FX3G: 24 models |
FX3U: 37 models |
Control method |
Stored program
cyclic operation |
Stored program cyclic operation |
||
I/O control mode |
Refresh mode |
Refresh mode |
||
Programming language |
Ladder diagram |
Ladder diagram |
||
Engineering
environment |
MELSOFT GX Works3 |
MELSOFT GX Works2 |
||
Program size (K
step) |
64 |
4 |
32 |
64 |
Number of I/O points
[X/Y] (point) |
256 |
30 |
128 |
256 |
Device/label memory/
standard RAM (K byte) |
120 |
— |
— |
— |
Data memory/
standard ROM (byte) |
5 M |
— |
— |
— |
Processing speed |
||||
LD instruction (ns) |
34 |
210 |
210 |
65 |
MOV instruction (ns) |
34 |
520 |
520 |
640 |
Floating point
addition (µs) |
3.06 |
11.96 |
11.96 |
14.2 |
Memory interface |
||||
Extended SRAM
cassette |
— |
● |
●*11 |
● |
SD memory card |
● |
— |
— |
— |
SRAM card, FLASH
card, ATA card |
— |
— |
— |
— |
External interface |
||||
USB |
— |
● |
● |
●*14 |
Ethernet |
● |
— |
— |
— |
RS-232 |
— |
● |
● |
● |
RS-422/485 |
● |
● |
● |
● |
Display unit |
— |
● |
●*11 |
● |
CC-Link IE
connection port |
||||
Ethernet |
— |
— |
— |
— |
Network connectivity
(adapter/module) |
||||
Ethernet |
● |
● |
● |
● |
CC-Link IE Control |
— |
— |
— |
— |
CC-Link IE Field |
● |
— |
— |
— |
CC-Link |
● |
— |
● |
● |
CC-Link/LT |
— |
— |
● |
● |
SSCNET Ⅲ/H |
● |
— |
— |
●*16 |
AnyWire |
● |
— |
● |
● |
BACnet™ |
— |
— |
— |
— |
MODBUS®/TCP |
● |
— |
— |
— |
MODBUS® |
● |
● |
● |
● |
General
specifications/conformed standards |
||||
Operating ambient
temperature |
0...55℃*20 |
0...55℃ |
0...55℃ |
0...55℃ |
International safety
standards |
— |
— |
— |
— |
Standard on
corrosive atmosphere |
— |
— |
— |
— |
CE: Council
Directive of the European Communities |
● |
● |
● |
● |
UL: Underwriters
Laboratories Listing |
● |
● |
● |
● |
LR: Lloyd's Register
of Shipping approval |
— |
● |
● |
● |
DNV: Norwegian Maritime
approval |
— |
● |
● |
● |
RINA: Italian
Maritime approval |
— |
● |
● |
● |
NK: ClassNK approval |
— |
● |
● |
● |
ABS: American Bureau
of Shipping approval |
— |
● |
● |
● |
BV: Bureau Veritas
approval |
— |
● |
● |
● |
GL: Germanischer
Lloyd approval |
— |
● |
● |
● |
Key
features/functions |
Machine control |
Machine control |
*1: Supports redundant
system when paired with R6RFM
*2: SFC is not supported in redundant mode and by safety CPU
*3: Q□UDVCPU only
*4: When using CW Workbench
*5: Does not support QnUDVCPU and certain models
*6: Does not support L02SCPU(-P)
*7: Supports the user Ethernet port of Q24DHCCPU-V/VG/LS and Q26DHCCPU-LS only
*8: Supports Q□UDE(H)CPU and Q□UDVCPU only
*9: Does not support Q□UDE(H)CPU and Q□UDVCPU
*10: Supports L02SCPU(-P) only
*11: Supports FX3G only
*12: R□ENCPU only
*13: Supports the MELSEC iQ-R Series only.
*14: Supported by expansion board
*15: Does not support Q□(P)(H)CPU and Q□PRHCPU
*16: Supports SSCNET Ⅲ
*17: Only supported when used together with extended temperature range
main/extension base units
*18: R□SFCPU-SET only.
*19: For protection against aggressive atmosphere and gases, products with a
conformal coating (JIS C 60721-3-3/IEC 60721-3-3 Class 3C2) are available on
request
*20: Operating ambient temperature from -20℃ is supported by products produced from June
2016 (serial number "166" or later). For details, on supported
products, please refer to the relevant product manual.