Factory Automation

MELSEC iQ-F series Advanced MELSEC iQ-F Series

Advanced MELSEC iQ-F Series

Simple and convenient parameter settings

With MELSEQ iQ-F, various device settings that conventionally had to be programmed can be input in table format.
Easily set the built-in functions as well as expansion devices just by inputting values into the parameters.
The program’s execution trigger can also be set with the parameters.

[Functions set with parameters]

Settings for CPU parameters, Ethernet port, RS-485 communication port, input response time, expansion board, memory card, security, etc.
Settings for expansion adapter, intelligent function module and program parameters

Simple and convenient parameter settings

Memory area for each application

The CPU module has 64 k steps of program memory capacity, but the MELSEC iQ-F has a memory data area for each application, so all 64 k steps can be used as the program area.
Comments and statements can be written freely without affecting the program area.

[Maximum number of characters]

Comment: 1024 characters   Statement: 5000 characters

MELSEC iQ-F Series stores the program and devices in non-volatile memory such as Flash ROM, so no battery is required.

Memory area for each application

Flexible internal devices

A variety of devices including new latch relays and link relays, and expanded timers and counters are available.
The number of device points can be reassigned and used in the internal memory.

  1. Providing the convenience of special devices

In addition to the conventional special devices, up to 12000 points of convenient system devices compatible with upper level devices are added.

New upper level compatible system devices

  • SM/SD0 to 4099
  • Compatible with
upper level compatible system

Conventional convenient devices

  1. Conventional M8000 or later devices
    -> Has changed to SM8000 or later devices
  2. Conventional D8000 or later devices
    -> Has changed to SD8000 or later devices
    (When migrating an FX3U/FX3UC program created using GX Works2 to MELSEC iQ-F Series, the devices are automatically converted.)
  1. Freely customize the latch range setting

The latch range can be set for each device, so the latch clear range can be selected during the clearing operation.

Freely customize the latch range setting
  1. Handy timer and counter settings

The timer and counter properties are determined by data type and how instruction is written, so programs can be created regardless of the device number.


  • OUT T0…100 ms timer
  • OUTH T0…10 ms timer
  • OUTHS T0…1 ms timer
  • OUT ST0…Retentive timer


  • OUT C0…16 bits counter
  • OUT LC0…32 bits counter

Dramatically more dedicated instructions

A great number of dedicated instructions have been added since the FX3 Series.

upper level compatible system
[FX3] 510 types [FX5] 1014 types

The newly added instructions include convenient ones that are interchangeable with the MELSEC iQ-R and dedicated instructions for built-in functions.
(Programs created with GX Works2 can also be read in and converted.)

Intuitive and easy-to-understand arithmetic operations

Symbols can be input in the arithmetic operations making it easy and intuitive to describe programs.

Intuitive and easy-to-understand arithmetic operations

High-performance built-in high-speed counter function

Input and measure three modes by setting the parameters.

  1. Normal mode
  2. Pulse density measurement mode
  3. Rotation speed measurement mode

Up to 32 tables can be set for the high-speed comparison table and up to 128 tables for the multi-point output high-speed comparison table. The DHCMOV instruction can be used to read the latest values from the special registers.

High-performance built-in high-speed counter function

Reinforced built-in positioning function

Positioning is easy using table operations. Simple linear interpolation operation is possible by using the DRVTBL with multiple table operation and the multiple axis table drive DRVMUL.

Diverse table operation settings for multi-speed and interrupt positioning, etc.

Reinforced built-in positioning function

Inverter communication command function

The built-in Mitsubishi inverter protocol makes it possible to use inverter communication instructions to control a Mitsubishi inverter connected with RS-485 communication.

  • IVCK: Operation monitor
  • IVDR: Operation control
  • IVRD: Parameter read
  • IVWR: Parameter write
  • IVBWR: Parameter batch write
  • IVMC: Multiple command (2 types of settings and 2 types of read)
Inverter communication command function

*: For built-in RS-485 and RS-485 expansion boards

Built-in Ethernet function

Communication is set with parameters easily.
Functions including the diagnosis function from GX Works3, SLMP function, socket communication function and IP address change function and unauthorized access from an external source can be prevented with remote password.

Built-in Ethernet function

MODBUS function

The MODBUS function can be used with parameter settings and ADPRW (MODBUS master communication instruction [data read/write.])
Communicate with devices up to 1200 m away using the RS-485 communication adapter.

MODBUS function

Standard function/function block function

110 types of basic standard function and function blocks are provided.
These can be used as parts by dragging and dropping, so when used together with dedicated instructions, programming time can be greatly reduced.

Standard function/function block function