Mitshubishi FXCPU Programming Manual

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Page 1

FXCPU

Structured Programming Manual

Device & Common

Page 2

Page 3

FXCPU Structured Programming Manual

[Device & Common]

FXCPU Structured Programming Manual

[Device & Common]

Manual No. JY997D26001

Revision L

Date 4/2015

Foreword

This manual describes devices and parameters for structured programs used in the MELSEC-F FX Series. Please read this manual and manuals of relevant products before use, sufficiently understand the specifications, and use the unit correctly and safely. See to it that this manual is supplied to the end user.

This manual confers no industrial property rights or any 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 described in this manual.

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FXCPU Structured Programming Manual

[Device & Common]

Outline Precautions

• This manual provides information for the use of the FX Series Programmable Controllers. The manual has been written to be used by trained and competent personnel. The definition of such a person or persons is as follows;

a) Any engineer who is responsible for the planning, design and construction of automatic equipment

using the product associated with this manual should be of a competent nature, trained and qualified to the local and national standards required to fulfill that role. These engineers should be fully aware of all aspects of safety with regards to automated equipment.

b) Any commissioning or service engineer must be of a competent nature, trained and qualified to the

local and national standards required to fulfill that job. These engineers should also be trained in the use and maintenance of the completed product. This includes being completely familiar with all associated documentation for the said product. All maintenance should be carried out in accordance with established safety practices.

c) All operators of the completed equipment should be trained to use that product in a safe and

coordinated manner in compliance to established safety practices. The operators should also be familiar with documentation which is connected with the actual operation of the completed equipment.

Note: the term 'completed equipment' refers to a third party constructed device which contains or uses

the product associated with this manual

• 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 with 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.

• When combining this product with other products, please confirm the standard and the code, or regulations with which the user should follow. Moreover, please confirm the compatibility of this product to the system, machine, and apparatus with which a user is using.

• If in doubt at any stage during the installation of the product, always consult a professional electrical engineer who is qualified and trained to 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, you have noticed a doubtful point, a doubtful error, etc., please contact the nearest Mitsubishi Electric representative.

Registration

•Microsoft®, Windows® and Excel® are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

• CompactFlash is a trademark of SanDisk Corporation in the United States and other countries.

• Ethernet is a trademark of Xerox Corporation.

•MODBUS

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

is a registered trademark of Schneider Electric SA.

Page 5

FXCPU Structured Programming Manual

[Device & Common]

Positioning of This Manual....................................................................................................... 6

Related Manuals........................................................................................................................ 9

Generic Names and Abbreviations Used in Manuals .......................................................... 12

1. Device Outline 13

1.1 Devices Constructing PLC ......................................................................................................... 13

1.1.1 Relation among devices ................................................................................................................ 14

1.1.2 Device function list.........................................................................................................................15

1.2 Program Memory and Devices................................................................................................... 17

1.2.1 Memory structure........................................................................................................................... 17

1.2.2 Memory operations and backup against power interruption (power ON/OFF and RUN/STOP) ... 22

1.2.3 Types of backup methods against power interruption...................................................................32

1.2.4 Change of devices between general type and latched (backed-up) type...................................... 33

1.2.5 How to initialize latched (backed-up) type devices........................................................................ 33

2. Devices in Detail 35

Table of Contents

2.1 Device Number List..................................................................................................................... 35

2.2 Input/Output Relays [X and Y] ................................................................................................... 37

2.2.1 Numbers of input/output relays...................................................................................................... 37

2.2.2 Functions and roles .......................................................................................................................39

2.2.3 Operation timing of I/O relays........................................................................................................40

2.3 Auxiliary relay [M] ....................................................................................................................... 41

2.3.1 Numbers of auxiliary relays ........................................................................................................... 41

2.3.2 Functions and operation examples................................................................................................ 42

2.4 State Relay [S]............................................................................................................................. 44

2.4.1 Numbers of state relays................................................................................................................. 44

2.4.2 Functions and operation examples................................................................................................ 46

2.5 Timer [T]....................................................................................................................................... 48

2.5.1 Numbers of timers ......................................................................................................................... 48

2.5.2 Functions and operation examples................................................................................................ 50

2.5.3 Set value specification method...................................................................................................... 52

2.5.4 Cautions on use............................................................................................................................. 52

2.5.5 Details of timer operations and timer accuracy .............................................................................52

2.5.6 Program examples [Off-delay timer and flicker timer] ...................................................................53

2.5.7 Handling timers as numeric devices.............................................................................................. 54

2.6 Counter [C] .................................................................................................................................. 55

2.6.1 Numbers of counters ..................................................................................................................... 55

2.6.2 Features of counters......................................................................................................................56

2.6.3 Related devices (to specify counting direction) [32-bit counter] .................................................... 56

2.6.4 Functions and operation examples................................................................................................ 57

2.6.5 Set value specification method...................................................................................................... 58

2.6.6 Cautions on use............................................................................................................................. 59

2.6.7 Response speed of counters.........................................................................................................59

2.6.8 Counters handled as numeric devices ..........................................................................................59

2.7 High Speed Counter [C].............................................................................................................. 62

2.7.1 Types and device numbers of high speed counters ...................................................................... 62

2.7.2 Input assignment for high speed counters..................................................................................... 69

2.7.3 Handling of high speed counters ................................................................................................... 74

2.7.4 Current value update timing and comparison of current value ...................................................... 77

2.7.5 Related devices............................................................................................................................. 78

2.7.6 Change of logic of external reset input signal................................................................................ 79

2.7.7 Assignment of counter input terminal and switching of function.................................................... 80

2.7.8 How to use 2-phase 2-counting input counters C251 to C255 for 4-edge counting ...................... 82

2.7.9 Condition under which hardware counters are handled as software counters ..............................83

2.7.10 Response frequency of high speed counters .............................................................................. 84

2.7.11 Cautions on use........................................................................................................................... 92

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FXCPU Structured Programming Manual

[Device & Common]

2.8 Data Register and File Register [D] ........................................................................................... 94

2.8.1 Numbers of data registers and file registers.................................................................................. 94

2.8.2 Structure of data registers and file registers.................................................................................. 96

2.8.3 Functions and operation examples of data registers..................................................................... 96

2.8.4 Functions and operation examples of file registers .......................................................................99

2.8.5 Cautions on using file registers ...................................................................................................103

2.9 Extension Register [R] and Extension File Register [ER] ..................................................... 104

2.9.1 Numbers of extension registers and extension file registers....................................................... 104

2.9.2 Data storage destination and access method ............................................................................. 104

2.9.3 Structure of extension registers and extension file registers .......................................................105

2.9.4 Initialization of extension registers and extension file registers ................................................... 105

2.9.5 Functions and operation examples of extension registers ..........................................................106

2.9.6 Functions and operation examples of extension file registers..................................................... 107

2.9.7 Cautions on using extension file registers................................................................................... 109

2.9.8 Registration of data stored in extension registers and extension file registers............................ 111

2.10 Index Register [V and Z]......................................................................................................... 115

2.10.1 Numbers of index registers........................................................................................................ 115

2.10.2 Functions and structures ........................................................................................................... 116

2.10.3 Indexing of devices....................................................................................................................116

2.11 Pointer [P and I]....................................................................................................................... 117

2.11.1 Numbers of pointers ..................................................................................................................117

2.11.2 Functions and operation examples of branch pointers.............................................................. 118

2.11.3 Functions and operation examples of interrupt pointers............................................................ 119

Table of Contents

3. How to Specify Devices and Constants in Instructions 124

3.1 Numeric Values Handled in PLCs (Octal, Decimal, Hexadecimal and Real Numbers)....... 124

3.1.1 Types of numeric values.............................................................................................................. 124

3.1.2 Conversion of numeric values ..................................................................................................... 125

3.1.3 Handling of numeric values in floating point operations ..............................................................125

3.2 Specification of Constants K, H and E (Decimal, Hexadecimal and Real Numbers) .......... 128

3.2.1 Constant "K" (decimal number) ...................................................................................................128

3.2.2 Constant "H" (hexadecimal number) ........................................................................................... 128

3.2.3 Constant "E" (real number)..........................................................................................................128

3.3 Character Strings...................................................................................................................... 129

3.3.1 Character string constant ("ABC") ............................................................................................... 129

3.3.2 Character string data................................................................................................................... 129

3.4 Specification of Digits for Bit Devices (Kn***) ..................................................................... 131

3.5 Specification of Bit for Word Device [D.b] ........................................................................... 132

3.6 Direct Specification of Buffer Memory (U\G) ..................................................................... 132

3.7 Indexing .....................................................................................................................................133

3.7.1 Indexing in basic instructions.......................................................................................................133

3.7.2 Indexing in instructions................................................................................................................ 134

3.7.3 Indexing example for instructions whose number of times of use is restricted............................ 137

4. Operations of Special Devices (M8000 and later, D8000 and later) 138

4.1 Special Device List (M8000 and later, D8000 and later)......................................................... 138

4.1.1 Special auxiliary relays (M8000 and later)................................................................................... 138

4.1.2 Special data registers (D8000 and later) ..................................................................................... 177

4.2 Supplement of Special Devices (M8000 and later and D8000 and later).............................. 216

4.2.1 RUN monitor and initial pulse [M8000 to M8003] ........................................................................ 216

4.2.2 Watchdog timer time [D8000] ...................................................................................................... 217

4.2.3 Low battery voltage detection [M8005 and M8006]..................................................................... 217

4.2.4 Power interruption detection time [D8008, M8008 and M8007] .................................................. 218

4.2.5 Operation cycle (scan time) monitor [D8010 to D8012]............................................................... 219

4.2.6 Internal clock [M8011 to M8014] ................................................................................................. 219

4.2.7 Real-time clock [M8015 to M8019 and D8013 to D8019]............................................................ 220

4.2.8 How to set real-time clock ........................................................................................................... 221

4.2.9 Input filter adjustment [D8020]([D8021])...................................................................................... 223

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FXCPU Structured Programming Manual

[Device & Common]

4.2.10 Battery [BATT (BAT)] LED OFF command [M8030].................................................................. 228

4.2.11 Built-in analog variable potentiometers [D8030, D8031, D8013]............................................... 230

4.2.12 Clear command [M8031 and M8032] ........................................................................................ 231

4.2.13 Memory hold stop [M8033] (Output holding in STOP mode).....................................................231

4.2.14 All output disable command [M8034] ........................................................................................ 231

4.2.15 Independent operation for RUN/STOP input [M8035 to M8037] ............................................... 232

4.2.16 Constant scan mode [M8039 and D8039] (Fixed scan time) .................................................... 233

4.2.17 State control in program by STL instruction [M8040] ................................................................233

4.2.18 Analog expansion boards [M8260 to M8279 and D8260 to D8279].......................................... 234

4.2.19 Analog special adapters [M8260 to M8299 and D8260 to D8299]

3S/FX3G/FX3GC/FX3U/FX3UC PLCs) .................................................................................. 236

(FX

5. Errors 243

5.1 FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs...................................................................................... 243

5.1.1 Error detection devices................................................................................................................243

5.1.2 Error Code List and Action ..........................................................................................................245

5.2 FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs ...................................................................................... 254

5.2.1 Error detection devices................................................................................................................254

5.2.2 Error Code List and Action ..........................................................................................................256

5.3 FX0S/FX0/FX0N/FXU/FX2C PLCs............................................................................................... 263

5.3.1 Error detection devices................................................................................................................263

5.3.2 Error Code List and Action ..........................................................................................................265

Table of Contents

6. Types and Setting of Parameters 269

6.1 Parameter List ........................................................................................................................... 270

6.2 Parameter Initial Values............................................................................................................ 273

6.3 Memory Capacity Setting Range ............................................................................................. 275

6.4 Compatible Optional Memory Models..................................................................................... 277

6.5 Keyword ..................................................................................................................................... 279

6.5.1 PLC applicability and access restriction ...................................................................................... 279

6.5.2 Registering and changing keywords............................................................................................ 281

6.6 Parameter setting by GX Works2 ............................................................................................284

6.6.1 PLC Parameter setting ................................................................................................................ 284

6.6.2 Network parameter ...................................................................................................................... 298

6.6.3 Transferring parameters (, sequence program and symbolic information

) to the PLC ............. 302

7. Other Functions 303

7.1 Symbolic information storage and block password.............................................................. 303

7.1.1 Storage of symbolic information .................................................................................................. 303

7.1.2 Block password ........................................................................................................................... 303

Warranty................................................................................................................................. 305

Revision History.................................................................................................................... 306

Page 8

FXCPU Structured Programming Manual

[Device & Common]

Positioning of This Manual

This manual explains devices and parameters for structured programs provided by GX Works2. Refer to other manuals for sequence instructions and application functions. Refer to each corresponding manual for analog, communication, positioning control and special units and blocks.

1. When using FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

MELSEC-Q/L/F Structured Programming Manual (Fundamentals)

Q/L/F

Structured

This manual explains programming methods, specifications, functions, etc. required to create structured programs.

(This manual)

FXCPU Structured Programming Manual [Device & Common]

This manual explains devices and parameters for structured programs provided by GX Works2.

Positioning of This Manual

(Additional Manual)

Structured

3GC

3UC

FXCPU Structured Programming Manual [Basic & Applied Instruction]

(Additional Manual)

This manual explains sequence instructions for structured programs provided by GX Works2.

FXCPU Structured Programming Manual [Application Functions]

(Additional Manual)

This manual explains application functions for structured programs provided by GX Works2.

FX3S/FX3G/FX

3GC

/FX3U/FX

3UC

User's Manual- Analog Control Edition

(Additional Manual)

This manual explains details of analog special function blocks and analog special adapters for FX Explanation of instructions and instructions used in program examples are expressed for GX Developer.

FX Series User's Manual -Data Communication Edition

This manual explains details of simple N:N link, parallel link, computer link, no-protocol communication (RS and RS2 instructions), programming communication and inverter communication for FX PLCs. Explanation of instructions and instructions used in program examples are expressed for GX Developer.

/FX3G/FX

3GC

/FX3U/FX

3UC

PLCs and PID instruction.

(Additional Manual)

3GC

3UC

Special

unit/block

FX3S/FX3G/FX

This manual explains details of wiring, instructions and operations of the positioning function built in FX Explanation of instructions and instructions used in program examples are expressed for GX Developer.

Individual manuals

This manual explains details of each special unit/block. Explanation of instructions and instructions used in program examples are expressed for GX Developer.

*1. Detailed explanation may be provided by a separate manual in some products.

3GC

/FX3U/FX

/FX3G/FX

3UC

Series User's Manual -Positioning Edition

3GC

/FX3U/FX

3UC

PLC main units.

(Manual supplied with product or additional Manual )

(Additional Manual)

Page 9

FXCPU Structured Programming Manual

[Device & Common]

2. When using FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

Positioning of This Manual

Q/L/F

Structured

MELSEC-Q/L/F Structured Programming Manual [Fundamentals]

This manual explains programming methods, specifications, functions, etc. required to create structured programs.

(This manual)

FXCPU Structured Programming Manual [Device & Common]

Structured

This manual explains devices and parameters for structured programs provided by GX Works2.

FXCPU Structured Programming Manual [Basic & Applied Instruction]

This manual explains sequence instructions for structured programs provided

Structured

by GX Works2.

FXCPU Structured Programming Manual [Application Functions]

This manual explains application functions for structured programs provided

Structured

by GX Works2.

(Additional Manual)

Special

unit/block

FX Series User's Manual -Data Communication Edition

This manual explains details of simple N:N link, parallel link, computer link, no-protocol communication (RS instruction), programming communication and inverter communication for FX PLCs. Explanation of instructions and instructions used in program examples are expressed for GX Developer and FX-PCS/WIN.

Individual manuals

This manual explains details of each special unit/block. Explanation of instructions and instructions used in program examples are expressed for GX Developer and FX-PCS/WIN.

*1. Detailed explanation may be provided by a separate manual in some products.

(Manual supplied with product or additional Manual )

(Additional Manual)

Page 10

FXCPU Structured Programming Manual

[Device & Common]

3. When using FX0S/X0/FX0N/FXU/FX2C PLCs

Positioning of This Manual

Q/L/F

Structured

MELSEC-Q/L/F Structured Programming Manual (Fundamentals)

This manual explains programming methods, specifications, functions, etc. required to create structured programs.

(Additional Manual)

(This manual)

FXCPU Structured Programming Manual [Device & Common]

Structured

This manual explains devices and parameters for structured programs provided by GX Works2.

FXCPU Structured Programming Manual [Basic & Applied Instruction]

This manual explains sequence instructions for structured programs provided

Structured

by GX Works2.

FXCPU Structured Programming Manual [Application Functions]

This manual explains application functions for structured programs provided

Structured

by GX Works2.

(Additional Manual)

Special

unit/block

FX Series User's Manual -Data Communication Edition

This manual explains details of parallel link, computer link, no-protocol communication (RS instruction) and programming communication for FX PLCs. Explanation of instructions and instructions used in program examples are expressed for GX Developer and FX-PCS/WIN.

Individual manuals

This manual explains details of each special unit/block. Explanation of instructions and instructions used in program examples are expressed for GX Developer and FX-PCS/WIN.

*1. Detailed explanation may be provided by a separate manual in some products.

(Manual supplied with product or additional Manual )

(Additional Manual)

Page 11

FXCPU Structured Programming Manual

[Device & Common]

Related Manuals

This manual explains devices and parameters for structured programs provided by GX Works2. Refer to other manuals for sequence instructions and applied functions. This chapter introduces only reference manuals for this manual and manuals which describe the hardware information of PLC main units. Manuals not introduced here may be required in some applications. Refer to the manual of the used PLC main unit and manuals supplied together with used products. Contact the representative for acquiring required manuals.

Common among FX PLCs [structured]

Manual name Manual number

MELSEC-Q/L/F Structured Programming Manual (Fundamentals)

FXCPU Structured Programming Manual [Device & Common]

FXCPU Structured Programming Manual [Basic & Applied Instruction]

FXCPU Structured Programming Manual [Application Functions]

SH-080782 Additional Manual

JY997D26001 Additional Manual

JY997D34701 Additional Manual

JY997D34801 Additional Manual

Supplied with product

or Additional Manual

Related Manuals

Contents

Programming methods, specifications, functions, etc. required to create structured programs

Devices, parameters, etc. provided in structured projects of GX Works2

Sequence instructions provided in structured projects of GX Works2

Application functions provided in structured projects of GX Works2

Model

name code

13JW06

09R925

09R926

09R927

3S/FX3G/FX3GC/FX3U/FX3UC PLCs

Manual name Manual number

PLC main unit

FX3U Series Hardware Manual JY997D18801 Supplied with product

FX3U Series User's Manual- Hardware Edition

FX3UC (D, DS, DSS) Series Hardware Manual

FX3UC-32MT-LT-2 Hardware Manual JY997D31601 Supplied with product

FX3UC Series User's Manual Hardware Edition

FX3G Series Hardware Manual JY997D46001 Supplied with product

3G Series User's Manual- Hardware

FX Edition

FX3GC Series Hardware Manual JY997D45201 Supplied with product

FX3GC Series User's ManualHardware Edition

JY997D16501 Additional Manual

JY997D28601 Supplied with product

JY997D28701 Additional Manual

JY997D31301 Additional Manual

JY997D45401 Additional Manual

Supplied with product

or Additional Manual

Contents

I/O specifications, wiring and installation of the PLC main unit FX3U extracted from the FX3U Series User’s Manual - Hardware Edition. For detailed explanation, refer to the FX3U Series User’s Manual - Hardware Edition.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX3U PLC main unit.

I/O specifications, wiring and installation of the PLC main unit FX3UC (D, DS, DSS) extracted from the FX3UC Series User’s Manual - Hardware Edition. For detailed explanation, refer to the FX3UC Series User’s Manual - Hardware Edition.

I/O specifications, wiring and installation of the PLC main unit FX3UC-32MT-LT-2 extracted from the FX3UC Series User’s Manual - Hardware Edition. For detailed explanation, refer to the FX3UC Series User’s Manual - Hardware Edition.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX3UC PLC main unit.

I/O specifications, wiring and installation of the PLC main unit FX3G extracted from the FX3G Series User’s Manual - Hardware Edition. For detailed explanation, refer to the FX3G Series User’s Manual - Hardware Edition.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX

I/O specifications, wiring and installation of the PLC main unit FX3GC extracted from the FX3GC Series User's Manual - Hardware Edition. For detailed explanation, refer to the FX3GC Series User's Manual - Hardware Edition.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX3GC PLC main unit.

3G PLC main unit.

Model

name code

09R516

09R519

09R521

09R533

Page 12

FXCPU Structured Programming Manual

[Device & Common]

Related Manuals

Manual name Manual number

PLC main unit

FX3S Series Hardware Manual JY997D48301 Supplied with product

FX3S Series User's Manual Hardware Edition

Programming

FX3S/FX3G/FX3GC/FX3U/FX3UC User's Manual- Analog Control Edition

FX Series User's Manual -Data Communication Edition

FX3S/FX3G/FX3GC/FX3U/FX3UC Series User's Manual - MODBUS Serial Communication Edition

FX3S/FX3G/FX3GC/FX3U/FX3UC Series User's Manual -Positioning Edition

FX3U-CF-ADP User's Manual JY997D35401 Additional Manual

JY997D48601 Additional Manual

JY997D16701 Additional Manual

JY997D16901 Additional Manual

JY997D26201 Additional Manual

JY997D16801 Additional Manual

Supplied with product

or Additional Manual

FX1S/FX1N/FX1NC PLCs FX

2N/FX2NC PLCs [whose production is finished]

Contents

I/O specifications, wiring and installation of the PLC main unit FX3S extracted from the FX3S Series User's Manual - Hardware Edition. For detailed explanation, refer to the FX3S Series User's Manual - Hardware Edition.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX3S PLC main unit.

Details about the analog special function block (FX3U-4AD, FX3U-4DA, FX3UC-4AD) and analog special adapter (FX3U-****-ADP).

Details about simple N : N link, parallel link, computer link and no-protocol communication (RS instruction and FX2N-232IF).

Explains the MODBUS serial communication network in FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs.

Details about the positioning function built in the FX3S/FX3G/FX3GC/FX3U/FX3UC Series.

Describes details of the FX3U-CF-ADP CF card special adapter.

Model

name code

09R535

09R619

09R715

09R626

09R620

09R720

Manual name Manual number

PLC main unit

FX1S HARDWARE MANUAL JY992D83901 Additional Manual

FX1N HARDWARE MANUAL JY992D89301 Additional Manual

FX2N HARDWARE MANUAL JY992D66301 Additional Manual

1NC HARDWARE MANUAL JY992D92101 Additional Manual

FX2NC HARDWARE MANUAL JY992D76401 Additional Manual

Programming

FX Series User's Manual -Data Communication Edition

JY997D16901 Additional Manual

Supplied with product

or Additional Manual

Contents

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX1S PLC main unit.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX1N PLC main unit.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX2N PLC main unit.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX (Japanese only)

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX2NC PLC main unit.

Details about simple N : N link, parallel link, computer link and no-protocol communication (RS instruction and FX2N-232IF).

1NC PLC main unit.

Model

name code

09R508

09R505

09R509

09R715

Page 13

FXCPU Structured Programming Manual

[Device & Common]

FX0S/FX0/FX0N/FXU/FX2C PLCs [whose production is finished]

Related Manuals

Manual name Manual number

PLC main unit

FX0/FX0N HARDWARE MANUAL JY992D47501 Supplied with product

FX0S HARDWARE MANUAL JY992D55301 Supplied with product

FX/FX2C HARDWARE MANUAL JY992D47401 Supplied with product

Programming

FX Series User's Manual -Data Communication Edition

JY997D16901 Additional Manual

Supplied with product

or Additional Manual

Manuals of models whose production is finished

Production is finished for FX

0S/FX0/FX0N/FXU/FX2C/FX2N/FX2NC PLCs.

Contents

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX0/FX0N PLC main unit.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FX0S PLC main unit.

Details about the hardware including I/O specifications, wiring, installation and maintenance of the FXU/FX2C PLC main unit.

Details about simple N : N link, parallel link, computer link and no-protocol communication (RS instruction and FX2N-232IF).

Model

name code

09R715

Page 14

FXCPU Structured Programming Manual

[Device & Common]

Generic Names and Abbreviations Used in Manuals

Abbreviation/generic name Name

PLCs

FX3U Series or FX3U PLC Generic name of FX3U Series PLCs

FX3UC Series or FX3UC PLC Generic name of FX3UC Series PLCs

FX3G Series or FX3G PLC Generic name of FX3G Series PLCs

FX3GC Series or FX3GC PLC Generic name of FX3GC Series PLCs

FX3S Series or FX3S PLC Generic name of FX3S Series PLCs

FX2N Series or FX2N PLC Generic name of FX2N Series PLCs

FX2NC Series or FX2NC PLC Generic name of FX2NC Series PLCs

FX1N Series or FX1N PLC Generic name of FX1N Series PLCs

FX1NC Series or FX1NC PLC

FX1S Series or FX1S PLC Generic name of FX1S Series PLCs

FXU Series or FXU PLC Generic name of FXU(FX,FX2) Series PLCs

FX2C Series or FX2C PLC Generic name of FX2C Series PLCs

FX0N Series or FX0N PLC Generic name of FX0N Series PLCs

FX0S Series or FX0S PLC Generic name of FX0S Series PLCs

FX0 Series or FX0 PLC Generic name of FX0 Series PLCs

Special adapters

CF card special adapter Generic name of CF card special adapters

CF-ADP FX3U-CF-ADP

Ethernet adapter Abbreviated name for FX3U-ENET-ADP

Programming language

ST Abbreviation of structured text language

Structured ladder Abbreviation of ladder diagram language

FBD Abbreviation of function block diagram language

Manuals

Q/L/F Structured Programming Manual (Fundamentals)

FX Structured Programming Manual [Device & Common]

FX Structured Programming Manual [Basic & Applied Instruction]

FX Structured Programming Manual [Application Functions]

COMMUNICATION CONTROL EDITION

ANALOG CONTROL EDITION

POSITIONING CONTROL EDITION

Generic name of FX1NC Series PLCs These products can only used in Japan.

Abbreviation of MELSEC-Q/L/F Structured Programming Manual (Fundamentals)

Abbreviation of FXCPU Structured Programming Manual [Device & Common]

Abbreviation of FXCPU Structured Programming Manual [Basic & Applied Instruction]

Abbreviation of FXCPU Structured Programming Manual [Application Functions]

Abbreviation of FX Series User's Manual-DATA COMMUNICATION CONTROL EDITION

Abbreviation of FX3S/FX3G/FX3GC/FX3U/FX3UC Series User's Manual-ANALOG CONTROL EDITION

Abbreviation of FX3S/FX3G/FX3GC/FX3U/FX3UC Series User's Manual-POSITIONING CONTROL EDITION

Page 15

FXCPU Structured Programming Manual

[Device & Common]

1. Device Outline

1 Device Outline

1.1 Devices Constructing PLC

Device Outline

This chapter explains basic contents of devices.

1.1 Devices Constructing PLC

Each PLC has many built-in relays, timers, counters, etc. Each of which has many normally-open contacts and normally-closed contacts. Connect these contacts and coils to construct a program. Each PLC also has built-in memory devices including data registers (D) and extension registers (R) to store numeric data.

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 16

FXCPU Structured Programming Manual

[Device & Common]

1.1.1 Relation among devices

Arrow indicates signal transfer.

Input relay: X The PLC receives signals from external input switches via input relays.

The symbol of input relay is "X". The PLC has built-in input relays in accordance with its scale.

1 Device Outline

1.1 Devices Constructing PLC

Input terminal or input connector

Auxiliary relay: M The PLC has many

built-in auxiliary relays. The symbol of auxiliary relay is "M".

State relay: S The PLC has many built-in state relays. The symbol of state relay is "S".

Timer: T The PLC has many built-in timers. The symbol of timer is "T".

4123

Counter: C The PLC has many built-in counters. The symbol of counter is "C".

Output relay: Y The PLC drives

external loads via output relays. The PLC has many built-in output relays. The symbol of output relay is "Y".

Contact (one normally-open contact) for external output of output relay The PLC has built-in output contacts in accordance with its scale.

Output terminal or output connector

Page 17

FXCPU Structured Programming Manual

[Device & Common]

1.1.2 Device function list

1. Input relay (X) and output relay (Y)

• In the PLC main unit, input relays and output relays are assigned with serial octal numbers such as "X000 to X007", "X010 to X017", "Y000 to Y007" and "Y010 to Y017". In extension units and extension blocks, input relays and output relays are also assigned with serial octal numbers in the connection order from the PLC main unit.

• Digital filters are used in specified input relays, and the filter value can be changed in programs. Accordingly, assign input relay numbers having input filter for applications requiring high-speed receiving. (Refer to explanation of filter adjustment, input interrupt, high speed counter and various instructions.)

2. Auxiliary relay (M)

• Auxiliary relays are built in the PLC. Different from input relays and output relays, auxiliary relays cannot receive external inputs or cannot drive external loads directly. Auxiliary relays are available only in programs.

• In some auxiliary relays, the ON/OFF status is backed up against interruption of the PLC power.

3. State relay (S)

• State relays are used as process numbers in the step ladder.

• If state relays are not used as process numbers, they can be programmed as general contacts/coils in the same way as auxiliary relays.

• State relays can be used as annunciators for external failure diagnosis.

1 Device Outline

1.1 Devices Constructing PLC

→ Refer to Section 2.2.

→ Refer to Section 2.3.

→ Refer to Section 2.4.

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

4. Timer (T)

→ Refer to Section 2.5.

• Timers count clock pulses (1 ms, 10 ms, 100 ms, etc.) inside the PLC. When the count value reaches the set value, output contacts are activated. Timers can measure 0.001 to 3276.7 seconds in accordance with the base clock pulse.

5. Counter (C)

Counters are classified into the following types, and can be used for suitable purposes and applications.

1) Counter (latched type)

→ Refer to Section 2.6.

Counters are used for signals inside the PLC. The response speed is several tens of Hz or less usually.

- 16-bit counter: For up-counting, counting range: 1 to 32767

- 32-bit counter: For up/down-counting, counting range: -2,147,483,648 to +2,147,483,647

2) High speed counter (latched type backed up against power interruption)

→ Refer to Section 2.7.

High speed counters can count several kHz without regard to operations in the PLC.

- 32-bit counter: For up/down-counting, counting range: -2,147,483,648 to +2,147,483,647

(1-phase 1-counting, 1-phase 2 counting or 2-phase 2 counting) assigned to specific input relays

6. Data register (D)

→ Refer to Section 2.8.

Data registers store numeric data. FX PLCs have only 16-bit data registers (whose most significant bit indicates the positive or negative sign), but two combined data registers can handle 32-bit numeric value (whose most significant bit indicates the positive or negative sign). (Refer to "5. Counter" for the available numeric range.) Data registers are classified into the general type and the latched type (backed up against power interruption) in the same way as other devices.

Types and

Setting of

Parameters

Other Functions

Page 18

FXCPU Structured Programming Manual

[Device & Common]

7. Extension register (R) and extension file register (ER)

Only FX Extension registers(R) are extended type of data registers (D), and backed up against power interruption by battery in FX In FX is connected. FX (ER). However, FX attached.

8. Index register (V and Z)

Registers (V) (Z) are available for indexing. Add index registers (V) (Z) to other devices as follows: [In the case of "V0 = 5, Z0 = 5]

D100V0 = D105, C20Z0 = C25 ← Device number + Value of V Data registers and index registers are used to indirectly specify set values of timers and counters, or used in

instructions.

9. Pointer (P and I)

Pointers are classified into the branch type and the interrupt type.

• Branch pointers (P) specify the jump destination of the CJ (FNC 00: Conditional jump) and CALL

• Interrupt pointers (I) specify the interrupt routine for input interrupt, timer interrupt or counter interrupt.

3G/FX3GC/FX3U/FX3UC PLCs support extension registers (R) and extension file registers (ER).

3U/FX3UC PLCs.

3G/FX3GC PLCs, general type devices can be backed up against power interruption if an optional battery

3G/FX3GC/FX3U/FX3UC PLCs can store the contents of extension registers (R) in extension file registers

3U/FX3UC PLCs can use extension file registers (ER) only while a memory cassette is

(subroutine call) instructions.

1 Device Outline

1.1 Devices Constructing PLC

→ Refer to Section 2.9.

→ Refer to Section 2.10.

 or Z

→ Refer to Section 2.11.

10.Constant (K, H and E)

→ Refer to Chapter 3.

Among various numeric values used in PLCs, "K" indicates "decimal integer", "H" indicates "hexadecimal value", and "E" indicates "real number (floating point data)". Constants are used for set values and current values of timers and counters as well as input variables of instructions.

Page 19

FXCPU Structured Programming Manual

[Device & Common]

1.2 Program Memory and Devices

1.2.1 Memory structure

1 Device Outline

1.2 Program Memory and Devices

Device Outline

1. FX3U and FX3UC PLCs

CPU System ROM

Built-in device memory(RAM)

[Bit device memory]

Contact image memory

Input relay (X) Output relay (Y)

Auxiliary relay (M) State relay (S) Timer contact, time counting coil, counter contact, counting coil and reset coil

Built-in program memory(RAM)

Parameter

Sequence program

Comment

File register (D)

Special setting

Symbolic information

Devices in

Detail

Specified the

Device &

[Data memory]

Data register (D) Timer current value register (T) Counter current value register (C) Index register (V and Z)

Extension register (R)

Optional memory

(Flash memory)

Parameter

Sequence program

Comment

File register (D)

Special setting

Symbolic information

Transfer/initialization by instruction

Constant

Parameters

Special Device

Errors

Types and

Setting of

*1. Supported in Ver. 3.00 or later.

Extension file register (ER)

The PLC automatically recognizes attachment of an optional memory (when the power is turned ON), and isolates the built-in program memory. (The PLC gives the priority to the optional memory.)

Other Functions

Page 20

FXCPU Structured Programming Manual

[Device & Common]

2. FX3G and FX3GC PLCs

CPU System ROM

Built-in device memory(RAM, EEPROM)

[Bit device memory] [Data memory]

Contact image memory

Input relay (X) Output relay (Y)

Auxiliary relay (M) State relay (S) Timer contact, time counting coil, reset coil (T), counter contact, counting coil and reset coil (C)

Built-in program memory(EEPROM)

Parameter

Sequence program

Comment

File register (D)

Special setting

Extension file register (ER)

Data register (D) Timer current value register (T) Counter current value register (C) Index register (V and Z)

Extension register (R)

Transfer/initialization by instruction

1.2 Program Memory and Devices

Optional memory

(EEPROM)

Parameter

Sequence program

Comment

File register (D)

Special setting

Extension file register (ER)

1 Device Outline

Transfer/initialization by instruction

The PLC automatically recognizes attachment of an optional memory and isolates the built-in program memory. (The PLC gives the priority to the optional memory.)

(when the power is turned ON),

*1. Optional memory cannot be connected to FX3GC PLCs.

Page 21

FXCPU Structured Programming Manual

[Device & Common]

3. FX3S PLCs

CPU System ROM

1 Device Outline

1.2 Program Memory and Devices

Device Outline

Built-in device memory(RAM, EEPROM)

[Bit device memory] [Data memory]

Contact image memory

Input relay (X) Output relay (Y)

Auxiliary relay (M) State relay (S) Timer contact, time counting coil, reset coil (T), counter contact, counting coil and reset coil (C)

Built-in program memory(EEPROM)

Parameter

Sequence program

Comment

File register (D)

The PLC automatically recognizes attachment of an optional memory (when the power is turned ON), and isolates the built-in program memory. (The PLC gives the priority to the optional memory.)

Data register (D) Timer current value register (T) Counter current value register (C) Index register (V and Z)

Optional memory

(EEPROM)

Parameter

Sequence program

Comment

File register (D)

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 22

FXCPU Structured Programming Manual

[Device & Common]

4. FX1S/FX1N/FX2N/FX1NC/FX2NC PLCs

CPU System ROM

Built-in device memory(RAM, EEPROM)

[Bit device memory] [Data memory]

1 Device Outline

1.2 Program Memory and Devices

Contact image memory

Input relay (X) Output relay (Y)

Auxiliary relay (M) State relay (S) Timer contact, time counting coil, reset coil (T), counter contact, counting coil and reset coil (C)

Built-in program memory

(RAM, EEPROM)

Parameter

Sequence program

Comment

File register (D)

The PLC automatically recognizes attachment of

an optional memory

and isolates the built-in program memory.

(The PLC gives the priority to the optional memory.)

(when the power is turned ON),

Data register (D) Timer current value register (T) Counter current value register (C) Index register (V and Z)

Optional memory

(RAM,EEPROM,EPROM)

Parameter

Sequence program

Comment

File register (D)

Clock function

2NC-EEPROM16C)

(FX

Extension function

2N-ROM-E1)

(FX

Clock function + Extension function

(FX2NC-ROM-CE1)

*1. Optional memory cannot be connected to FX1NC PLCs.

Page 23

FXCPU Structured Programming Manual

[Device & Common]

5. FX0S/FX0/FX0N/FXU/FX2C PLCs

CPU System ROM

1 Device Outline

1.2 Program Memory and Devices

Device Outline

Built-in device memory(RAM, EEPROM)

[Bit device memory] [Data memory]

Contact image memory

Input relay (X) Output relay (Y)

Auxiliary relay (M) State relay (S) Timer contact, time counting coil, reset coil (T), counter contact, counting coil and reset coil (C)

Built-in program memory

(RAM, EEPROM)

Parameter

Sequence program

Comment

File register (D)

The PLC automatically recognizes attachment of

an optional memory

and isolates the built-in program memory.

(The PLC gives the priority to the optional memory.)

(when the power is turned ON),

Data register (D) Timer current value register (T) Counter current value register (C) Index register (V and Z)

Optional memory

(RAM,EEPROM,EPROM)

Parameter

Sequence program

Comment

File register (D)

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

*1. Optional memory cannot be connected to FX0S/FX0 PLCs.

*2. FX

0S/FX0 PLCs do not support file registers.

Other Functions

Page 24

FXCPU Structured Programming Manual

[Device & Common]

1.2 Program Memory and Devices

1 Device Outline

1.2.2 Memory operations and backup against power interruption (power ON/OFF and RUN/STOP)

1. FX3U/FX3UC PLCs

1) Types of program memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Parameter

Sequence program

Comment

File register

Special setting

Symbolic information

Can be secured by parameter setting.

Does not change.

2) Types of word device memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

General type Cleared.

Data register (D)

Extension register (R) Latched (backed-up) type

Extension file register

(ER)

Index register (V and Z) V, Z Cleared. Does not change.

Timer current value register (T)

Counter current value register (C)

Clock data Current value

Latched (backed-up) type

File type

Special type Cleared.

File type Does not change.

For 100 ms Cleared.

For 10 ms Cleared.

Retentive type for 100 ms

Retentive type for 1 ms

General type Cleared.

Latched (backed-up) type

High speed type

Does not change.

Set to initial

value.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

*1. Available in Ver. 3.00 or later.

*2. The program memory contents or device status is not held correctly when the battery voltage

becomes lower than the holding voltage if a memory cassette is not attached.

*3. The device status is not held correctly when the battery voltage becomes lower than the holding

voltage.

*4. Some devices are cleared when the PLC mode switches from STOP to RUN.

→ For special data registers, refer to Chapter 4.

*5. An optional memory cassette is required.

Page 25

FXCPU Structured Programming Manual

[Device & Common]

• Caution

When the battery voltage becomes low due to expiration of the battery life or another reason, programs (not stored in a memory cassette), latched (backed-up) type devices and clock data are not held correctly. Clear latched type devices, and transfer programs (not stored in a memory cassette) again. In addition, set the initial values and clock data if necessary.

→ For rough guide to the life and replacement timing of the battery, refer to the User's Manual

→ For the latched type device clear method, refer to Subsection 1.2.5.

3) Types of bit device memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Input relay (X) Cleared.

Output relay (Y) Cleared.

General type auxiliary relay (M)

Latched (backed-up) type

Contact image memory (X, Y, M, S)

Timer contact Time counting coil Reset coil (T)

Counter contact Counting coil Reset coil (C)

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

*2. When the battery voltage becomes lower than the holding voltage, the device status is not held

correctly.

auxiliary relay (M)

Special auxiliary relay (M) Cleared.

General type state relay (S)

Latched (backed-up) type state relay (S)

Annunciator (S) Cleared.

For 100 ms Cleared.

For 10 ms Cleared.

Retentive type for 100 ms Does not change.

Retentive type for 1 ms Does not change.

General type Cleared.

Latched (backed-up) type Does not change.

High speed type Does not change.

1 Device Outline

1.2 Program Memory and Devices

[Hardware Edition] of each PLC.

Does not change.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Cleared.

Does not change.

Set to initial

value.

Cleared.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

→ For special auxiliary relays, refer to Chapter 4.

Device Outline

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 26

FXCPU Structured Programming Manual

[Device & Common]

2. FX3G/FX3GC PLCs

1) Types of program memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Parameter

Sequence program

Comment

File register

2) Types of word device memory

Data register (D)

Extension register (R) General type

Extension file register

(ER)

Index register (V and Z) V, Z Cleared. Does not change.

Timer current value register (T)

Counter current value register (C)

Clock data Current value

Can be secured by parameter setting.

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

General type

Latched (backed-up) type

File type

Special type Cleared.

File type Does not change.

For 100 ms Cleared.

For 10 ms Cleared.

For 1 ms Cleared.

Retentive type for 100 ms

Retentive type for 1 ms

General type Cleared.

Latched (backed-up) type

High speed type Does not change.

Cleared.

Does not change.

Set to initial

value.

Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

*1. General type devices can be changed to the latched type by parameter setting if an optional battery is

attached.

*2. Some devices are cleared when the PLC mode switches from STOP to RUN.

→ For special data registers, refer to Chapter 4.

*3. The clock data is held by the power accumulated in the large-capacity capacitor built in the PLC.

The clock data is not held correctly if the voltage of the built-in large-capacity capacitor becomes low. The large-capacity capacitor can hold the clock data for 10 days (when the ambient temperature is 25°C) if it is charged fully (by turning ON the PLC for 30 minutes or more). The clock data is backed up by the battery when an optional battery is attached and the battery mode is selected by parameter setting.

Page 27

FXCPU Structured Programming Manual

[Device & Common]

3) Types of bit device memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Input relay (X) Cleared.

Output relay (Y) Cleared.

General type auxiliary relay (M)

Contact image memory (X, Y, M, S)

Timer contact Time counting coil Reset coil (T)

Counter contact Counting coil Reset coil (C)

*1. General type devices can be changed to the latched type by parameter setting if an optional battery is

attached.

*2. Some devices are cleared when the PLC mode switches from STOP to RUN.

Latched (backed-up) type auxiliary relay (M)

Special auxiliary relay (M) Cleared.

General type state relay (S)

Latched (backed-up) type state relay (S)

Annunciator (S) Does not change.

For 100 ms Cleared.

For 10 ms Cleared.

For 1 ms Cleared.

Retentive type for 100 ms Does not change.

Retentive type for 1 ms Does not change.

General type Cleared.

Latched (backed-up) type Does not change.

High speed type Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Cleared.

Does not change.

Set to initial

value.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

→ For special auxiliary relays, refer to Chapter 4.

Constant

Parameters

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Other Functions

Page 28

FXCPU Structured Programming Manual

[Device & Common]

3. FX3S PLC

1) Types of program memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Parameter Does not change.

Sequence program Does not change.

Comment

File register Does not change.

2) Types of word device memory

Data register (D)

Index register (V and Z) V, Z Cleared. Does not change.

Timer current value register (T)

Counter current value register (C)

Clock data Current value

Can be secured by parameter setting.

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

General type Cleared.

Latched (backed-up) type Does not change.

File type Does not change.

Special type Cleared.

For 100 ms Cleared.

For 10 ms Cleared.

For 1 ms Cleared.

Retentive type for 100 ms Does not change.

Retentive type for 1 ms Does not change.

General type Cleared.

Latched (backed-up) type Does not change.

High speed type Does not change.

Does not change.

Set to initial

value.

Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

→ For special data registers, refer to Chapter 4.

*2. The clock data is held by the power accumulated in the large-capacity capacitor built in the PLC.

Page 29

FXCPU Structured Programming Manual

[Device & Common]

3) Types of bit device memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Input relay (X) Cleared.

Output relay (Y) Cleared.

General type auxiliary

relay (M) Contact image memory (X, Y, M, S)

Timer contact Time counting coil Reset coil (T)

Counter contact Counting coil Reset coil (C)

Latched (backed-up) type

auxiliary relay (M)

Special auxiliary relay (M) Cleared.

General type state relay

(S)

Latched (backed-up) type

state relay (S)

For 100 ms Cleared.

For 10 ms Cleared.

For 1 ms Cleared.

Retentive type for 100 ms Does not change.

Retentive type for 1 ms Does not change.

General type Cleared.

Latched (backed-up) type Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Cleared.

Does not change.

Set to initial

value.

Cleared. Does not change.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Device Outline

Devices in

Detail

Constant

Specified the

Device &

Special Device

Errors

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

→ For special data registers, refer to Chapter 4.

Types and

Setting of

Parameters

Other Functions

Page 30

FXCPU Structured Programming Manual

[Device & Common]

4. FX1S/FX1N/FX2N/FX1NC/FX2NC PLCs

The memory type varies depending on the PLC, and is classified as follows by the device initialization timing.

Classification Power OFF Power OFF→ON STOP→RUN RUN→STOP

A1: Backed up by battery

A: Latched type memory

B: Special device and index memory Cleared.

C: Non-latched type memory Cleared.

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

1) Types of program memory

Parameter A2 A2

Sequence program A2 A2

Comment

File register A2 A2

A2: Backed up by EEPROM Does not change.

A3: Backed up by capacitor

Item FX1S FX1N FX2N FX1NC FX2NC

Can be secured by parameter setting.

1 Device Outline

1.2 Program Memory and Devices

(The device status is not held correctly when the battery voltage becomes

(The device status is held correctly for 10 days (when the ambient tempera-

ture is 25°C) after the capacitor is fully charged, but the device status is not

held correctly after the capacitor is discharged.)

A2 A2

Does not change.

lower than the holding voltage.)

Does not change.

Set to initial

value.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

*1. The battery is not used when an optional EEPROM or EPROM memory is attached.

2) Types of word device memory

Item FX1S FX1N FX2N FX1NC FX2NC

General type CCCCC

Data register (D)

Index register (V and Z) V, Z BBBBB

Timer current value register (T)

Counter current value register (C)

Clock data Current value A3A3A1A3

*1. Attach a memory board having the clock function when the clock function is required in the FX

Latched (backed-up) type A2 A2/A3 A1 A2/A3 A1

File type

Special type B B B B B

For 100 ms CCCCC

For 10 ms CCCCC

Retentive type for 100 ms - A3 A1 A3 A1

Retentive type for 1 ms - A3 A1 A3 A1

General type CCCCC

Latched (backed-up) type A2 A2/A3 A1 A2/A3 A1

High speed type A2 A2 A1 A2 A1

A2 A2 A1 A2 A1

2NC

Series.

Page 31

FXCPU Structured Programming Manual

[Device & Common]

3) Types of bit device memory

Item FX1S FX1N FX2N FX1NC FX2NC

Input relay (X) CCCCC

Output relay (Y) CCCCC

General type auxiliary relay (M)

Latched (backed-up) type

Contact image memory (X, Y, M, S)

Timer contact Time counting coil Reset coil (T)

Counter contact Counting coil Reset coil (C)

auxiliary relay (M)

Special auxiliary relay (M)BBBBB

General type state relay (S)

Latched (backed-up) type state relay (S)

Annunciator (S) - - A1 - A1

For 100 ms CCCCC

For 10 ms CCCCC

Retentive type for 100 ms - A3 A1 A3 A1

Retentive type for 1 ms - A3 A1 A3 A1

General type CCCCC

Latched (backed-up) type A2 A2/A3 A1 A2/A3 A1

High speed type A2 A2 A1 A2 A1

1 Device Outline

1.2 Program Memory and Devices

CCCCC

A2 A2/A3 A1 A2/A3 A1

A2 A2/A3 C A2/A3 C

A2 A2/A3 A1 A2/A3 A1

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 32

FXCPU Structured Programming Manual

[Device & Common]

5. FX0S/FX0/FX0N/FXU/FX2C PLCs

1) Types of program memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Parameter

Sequence program

Comment

File register

2) Types of word device memory

Data register (D)

Index register (V and Z) V, Z Cleared.

Timer current value register (T)

Counter current value register (C)

Clock data Current value

Can be secured by parameter setting.

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

General type

Latched (backed-up) type

File type

Special type Cleared.

For 100 ms Cleared.

For 10 ms Cleared.

Retentive type for 100 ms

Retentive type for 1 ms

General type Cleared.

Latched (backed-up) type

High speed type

Cleared.

Does not change.

Does not change*2.

Set to initial

value.

Set to initial

value.

Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

M8074 is backed up against power interruption.

*2. The device status is not held correctly when the battery voltage becomes lower than the holding

voltage.

U/FX2C PLCs)

(FX

Page 33

FXCPU Structured Programming Manual

[Device & Common]

3) Types of bit device memory

Item Power OFF Power OFF→ON STOP→RUN RUN→STOP

Input relay (X) Cleared.

Output relay (Y) Cleared.

General type auxiliary relay (M)

Contact image memory (X, Y, M, S)

Timer contact Time counting coil Reset coil (T)

Counter contact Counting coil Reset coil (C)

Latched (backed-up) type auxiliary relay (M)

Special auxiliary relay (M) Cleared.

General type state relay (S)

Latched (backed-up) type state relay (S)

Annunciator (S)

For 100 ms Cleared.

For 10 ms Cleared.

Retentive type for 100 ms

Retentive type for 1 ms

General type Cleared.

Latched (backed-up) type

High speed type

Cleared.

Does not change.

Set to initial

value.

Does not change.

1 Device Outline

1.2 Program Memory and Devices

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Does not change. Cleared.

Does not change while M8033 is ON.

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

*1. Some devices are cleared when the PLC mode switches from STOP to RUN.

M8074 is backed up against power interruption.

*2. The device status is not held correctly when the battery voltage becomes lower than the holding

voltage.

U/FX2C PLCs)

(FX

Types and

Setting of

Parameters

Other Functions

Page 34

FXCPU Structured Programming Manual

[Device & Common]

1.2.3 Types of backup methods against power interruption

There are following types of latch (backup) of the program memory and built-in devices in PLCs.

1. Battery backup method FX

U/FX2C/FX2N/FX2NC/FX3G/FX3GC/FX3U/FX3UC PLCs

Item Description

Latched (backed-up) contents A battery backs up the built-in RAM memory, latched type devices and clock data.

Maintenance

Cautions

2. Flash memory backup method

3U/FX3UC PLCs

Item Description

Latched (backed-up) contents

Maintenance Maintenance is not required.

Cautions

Periodical replacement is required. For rough guide to the replacement frequency, refer to the User's Manual [Hardware Edition] of each PLC.

1) When the battery voltage becomes low, sequence programs and other latched (backed-up) contents are lost.

2) When an optional memory cassette (flash memory) is attached, it is not necessary to back up sequence programs using the battery (in FX3U/FX3UC PLCs).

1) The flash memory built in a memory cassette holds sequence programs.

2) A battery is used also to hold latched (backed-up) type devices and clock data.

The upper limit is set for the number of times of overwriting. (Refer to the User's Manual [Hardware Edition] of each PLC.)

1 Device Outline

1.2 Program Memory and Devices

3. EEPROM backup method FX0S/FX0N/FX1S/FX1N/FX1NC/FX3S/FX3G/FX3GC PLCs

Item Description

Latched (backed-up) contents

Maintenance Maintenance is not required.

Cautions

1) The EEPROM built in the PLC holds sequence programs and latched (backed-up) type devices.

2) A capacitor is used also to hold the clock data.

1) The upper limit is set for the number of times of overwriting. (Refer to the User's Manual [Hardware Edition] of each PLC.)

2) For secure backup, it is necessary to keep the PLC power ON for 5 minutes or more, and then turn OFF the power.

4. Capacitor backup method

1N/FX1NC PLCs

Item Description

1) The large-capacity capacitor built in the PLC holds latched (backed-up) type devices and clock

Latched (backed-up) contents

Maintenance Maintenance is not required.

Cautions

data.

2) The capacitor holds data for 10 days (when the ambient temperature is 25°C) if it is fully charged as described below.

1) The large-capacity capacitor is charged while the PLC is ON, and fully charged after the PLC is ON for 30 minutes or more.

2) When the voltage of the large-capacity capacitor becomes low, latched (backed-up) type devices are not held correctly. When using the PLC for the first time after purchase, or when using the PLC after power OFF for a long time (10 days [when the ambient temperature is 25°C] in the fully charged status), clear latched (backed-up) type devices.

Page 35

FXCPU Structured Programming Manual

[Device & Common]

1.2 Program Memory and Devices

1.2.4 Change of devices between general type and latched (backed-up) type

FX0S/FX0/FX0N/FX1S/FX1N/FX1NC/FX3S/FX3G*1/FX3GC*1 PLCs do not support the type change of latched (backed-up) type devices.

1 Device Outline

Device Outline

1. When using latched (backed-up) type devices as non-latched type devices

Some latched (backed-up) type devices can be changed into the non-latched type by parameter setting. Devices dedicated to the latched type cannot be changed into the non-latched type. Such devices can be handled as non-latched type devices by clearing all latched type devices using the initial pulse (M8002) in a program.

2. When using non-latched type devices as latched (backed-up) type devices

Non-latched type devices can be changed into the latched (backed-up) type by parameter setting.

*1. In FX

3G/FX3GC PLCs, non-latched type devices can be changed into the latched (backed-up) type by

selecting the battery mode using a parameter if an optional battery is attached.

1.2.5 How to initialize latched (backed-up) type devices

Latched (backed-up) type devices can be initialized by clearing the whole PLC memory using peripheral equipment, clearing all latched type memories using the special auxiliary relay M8032, or executing the ZRST instruction. This subsection describes two major methods.

1. M8032 (latched type memory all clear)

When M8032 is set to ON, all latched (backed-up) devices*1 (including reset coils of timers and counters) are cleared. M8032 can be set to ON and OFF using the forced ON/OFF operation from peripheral equipment or in a sequence program. Note that latched type devices cannot be set to ON while M8032 is ON. When M8032 is set to ON in a program, note that latched type devices are cleared during execution of the END instruction after M8032 turns ON.

Program example: This program clears all latched type devices.

Constant

Parameters

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

M8002

M8032

Initial pulse

→ For details, refer to Subsection 4.2.11.

*1. General type devices which have been changed into the latched type in the FX

an optional battery attached are also cleared.

3G/FX3GC PLCs using

Other Functions

Page 36

FXCPU Structured Programming Manual

[Device & Common]

2. ZRST instruction (zone reset)

The ZRST instruction can clear multiple devices all at once. (Because only a limited device range can be specified for the ZRST instruction, only a part of latched type devices can be cleared at a time.)

Program example: This program clears latched (battery backed-up) type devices in the ranges shown in the table below in the FX

3U and FX3UC PLCs.

Clear input

ZRST

EN ENO

d1 d2

ZRST

EN ENO

d1 d2

ZRST

EN ENO

d1 d2

M500 M7679

S500 S4095

T246 T255

1.2 Program Memory and Devices

Latched (backed-up) device range

Auxiliary relay M500 to M7679

State relay S500 to S4095

Timer T246 to T255

Counter

Data register D200 to D7999

C100 to C199, C220 to C255

1 Device Outline

ZRST

EN ENO

C100

C199

ZRST

EN ENO

C220

C255

ZRST

EN ENO

D200

D7999

→ For details on latched (backed-up) type devices, refer to Subsection 1.2.2

Page 37

FXCPU Structured Programming Manual

[Device & Common]

2. Devices in Detail

2 Devices in Detail

2.1 Device Number List

Device Outline

This chapter explains how numeric values are handled in the PLC as well as the roles and functions of various built-in devices including I/O relays, auxiliary relays, state relays, counters and data registers. The following contents provide a basis for handling the PLC.

2.1 Device Number List

Device numbers are assigned in the FX3U and FX3UC PLCs as shown below. The assignment varies depending on each PLC. For details, refer to the reference section. For input relay numbers and output relay numbers when I/O extension equipment and special extension equipment are connected to the PLC main unit, refer to the User's Manual [Hardware Edition] of each PLC.

Device name Description Reference

I/O relay

Input relay X000 to X367 248 points

Output relay Y000 to Y367 248 points

Auxiliary relay

General type [changeable] M0 to M499 500 points

Latched (backed-up) type [changeable]

Latched (backed-up) type [fixed] M1024 to M7679 6656 points

Special type

State relay

Initial state (General type [changeable])

General type [changeable] S10 to S499 490 points

Latched (backed-up) type [changeable]

Annunciator (Latched (backed-up) type [changeable])

Latched (backed-up) type [fixed] S1000 to S4095 3096 points

Timer (on-delay timer)

100 ms T0 to T191 192 points 0.1 to 3276.7 sec

100 ms [for subroutine or interrupt routine]

10 ms T200 to T245 46 points 0.01 to 327.67 sec

Retentive type for 1 ms T246 to T249 4 points 0.001 to 32.767 sec

Retentive type for 100 ms T250 to T255 6 points 0.1 to 3276.7 sec

1 ms T256 to T511 256 points 0.001 to 32.767 sec

Counter

General type up-counter (16 bits) [changeable]

Latched (backed-up) type upcounter (16 bits) [changeable]

General type bidirectional counter (32 bits) [changeable]

Latched (backed-up) type bidirectional counter (32 bits) [changeable]

Device numbers are octal. The total number of inputs and outputs is 256.

Devices can be changed between the latched

M500 to M1023 524 points

M8000 to M8511 512 points Chapter 4

S0 to S9 10 points

S500 to S899 400 points

S900 to S999 100 points

T192 to T199 8 points 0.1 to 3276.7 sec

C0 to C99 100 points

C100 to C199 100 points

C200 to C219 20 points

C220 to C234 15 points

(backed-up) type and the non-latched type using parameters.

Devices can be changed between the latched (backed-up) type and the non-latched type using parameters.

0 to 32767 counts Devices can be changed between the latched (backed-up) type and the non-latched type using parameters.

-2147483648 to +2147483647 counts Devices can be changed between the latched (backed-up) type and the non-latched type using parameters.

Section 2.2

Section 2.3

Section 2.4

Section 2.5

Section 2.6

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 38

FXCPU Structured Programming Manual

[Device & Common]

Device name Description Reference

High speed counter

1-phase 1-counting input Bidirectional (32 bits)

1-phase 2-counting input Bidirectional (32 bits)

2-phase 2-counting input Bidirectional (32 bits)

Data register (32 bits when used in pair form)

General type (16 bits) [changeable]

Latched (backed-up) type (16 bits) [changeable]

Latched (backed-up) type (16 bits) [fixed] <file register>

Special type (16 bits)

Index type (16 bits)

Extension register/Extension file register

Extension register (16 bits) R0 to R32767 32768 points

Extension file register (16 bits) ER0 to ER32767 32768 points

Pointer

For JUMP or CALL branch P0 to P4095 4096 points For CJ and CALL instructions

Input interrupt Input delay interrupt

Timer interrupt

Counter interrupt I010 to I060 6 points For HSCS instruction

Nesting

For master control N0 to N7 8 points For MC instruction

Constant

Decimal (K)

Hexadecimal (H)

Real number (E) 32 bits

Character string ("") Character string

C235 to C245

C246 to C250

C251 to C255

D0 to D199 200 points

D200 to D511 312 points

D512 to D7999 <D1000 to D7999>

D8000 to D8511 512 points Chapter 4

V0 to V7, Z0 to Z7

I0 to I5

I6 to I8

16 bits -32,768 to +32,767

32 bits -2,147,483,648 to +2,147,483,647

16 bits 0 to FFFF

32 bits 0 to FFFFFFFF

2 Devices in Detail

2.1 Device Number List

Up to 8 points can be used among C235 to C255 [latched (backed-up) type] The setting can be changed between the latched (backed-up) type and the non-latched type using parameters.

-2,147,483,648 to +2,147,483,647 counts

Hardware counter 1 phase : 100 kHz × 6 points, 10 kHz × 2 points 2 phases : 50 kHz (1-edge counting), 50 kHz (4-edge counting) Software counter 1 phase : 40 kHz 2 phases : 40 kHz (1-edge counting), 10 kHz (4-edge counting)

7488 points <7000 points>

16 points Section 2.10

6 points

3 points

128

-1.0 × 2 Both the decimal point expression and the exponent expression are available.

Specify characters with quotation marks. In a constant of an instruction, up to 32 half-width characters are available.

The setting can be changed between the latched (backed-up) type and the non-latched type using parameters.

Among 7488 fixed latched (backed-up) type data registers, D1000 and later can be set as file registers in units of 500 points using parameters.

Backed up by a battery against power interruption.

Available only while a memory cassette is attached.

to -1.0 × 2

-126

, 0, 1.0 × 2

-126

to 1.0 × 2

128

Section 2.7

Section 2.8

Section 2.9

Section 2.11

Chapter 3

*1. When the FX3U-4HSX-ADP is connected to an FX3U PLC, the maximum input frequency is set as

follows: 1 phase : 200 kHz 2 phases : 100 kHz (1-edge counting), 100 kHz (4-edge counting)

*2. For supported functions, refer to Chapter 4.

For handling of the latched (backed-up) area, refer to Section 1.2.

Page 39

FXCPU Structured Programming Manual

[Device & Common]

2.2 Input/Output Relays [X and Y]

Some input relay and output relay numbers are secured in the main unit, and others are assigned to extension equipment according to the connection order. Because input/output relays are numbered in octal, numeric values such as "8" and "9" do not exist.

2.2.1 Numbers of input/output relays

The tables below show input relay (X) and output relay (Y) numbers. (Numbers are assigned in octal.)

1. FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

2 Devices in Detail

2.2 Input/Output Relays [X and Y]

Device Outline

Devices in

Detail

Model name FX3U-16M FX3U-32M FX3U-48M FX3U-64M FX3U-80M FX3U-128M When extended

FX3U PLC

FX3UC (D, DS, DSS) PLC

FX3UC-32MTLT(-2) PLC

FX3G PLC

FX3GC PLC

Input

Output

Model name FX3UC-32MT-LT(-2) When extended

Model name FX3G-14M FX3G-24M FX3G-40M FX3G-60M When extended

Input

Output

Model name FX

X000 to X007

8 points

Y000 to Y007

8 points

Model name FX3UC-16M FX3UC-32M FX3UC-64M FX3UC-96M When extended

Input

Output

Input

Output

X000 to X007

8 points

Y000 to Y005

6 points (8)

Input

Output

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X007

8 points

Y000 to Y007

8 points

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X015

Y000 to Y011

3GC-32MT/D(DSS) When extended

X000 to X017

16 points

Y000 to Y017

16 points

points

X000 to X027

24 points

Y000 to Y027

24 points

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X357

240 points

Y000 to Y357

240 points

X000 to X027

(16)

24 points

Y000 to Y017

16 points

X000 to X177

128 points

Y000 to Y177

128 points

X000 to X037

32 points

Y000 to Y037

32 points

X000 to X037

32 points

Y000 to Y037

32 points

X000 to X047

40 points

Y000 to Y047

40 points

X000 to X057

48 points

Y000 to Y057

48 points

256

points

in total

X000 to X043

points

Y000 to Y027

24 points

128

points

in total

(40)

X000 to X177

128 points

Y000 to Y177

128 points

X000 to X077

64 points

Y000 to Y077

64 points

X000 to X367

248 points

Y000 to Y367

248 points

X000 to X367

248 points

Y000 to Y367

248 points

256

points

in total

128

points

in total

256

points

in total

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Model name FX3S-10M FX3S-14M FX3S-20M FX3S-30M

FX3S PLC

Input

Output

X000 to X005

6 points

Y000 to Y003

4 points

X000 to X007

8 points

Y000 to Y005

6 points

X000 to X013

12 points

Y000 to Y007

8 points

X000 to X017

16 points

Y000 to Y015

14 points

*1. A number inside ( ) indicates the number of occupied points.

The difference from the number of effective points indicates unused numbers.

extension

Page 40

FXCPU Structured Programming Manual

[Device & Common]

2. FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

Model name FX1S-10M FX1S-14M FX1S-20M FX1S-30M

FX1S PLC

FX1N PLC

FX2N PLC

FX1NC PLC

Input

Output

Model name FX1N-24M FX1N-40M FX1N-60M When extended

Input

Output

Model name FX2N-16M FX2N-32M FX2N-48M FX2N-64M FX2N-80M FX2N-128M When extended

Input

Output

Model name FX1NC-16M FX1NC-32M When extended

Input

Output

X00 to X05

6 points

Y00 to Y03

4 points

X000 to X015

14 points

Y000 to Y011

10 points

X000 to X007

8 points

Y000 to Y007

8 points

X000 to X007

8 points

Y000 to Y007

8 points

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X017

16 points

Y000 to Y017

16 points

X00 to X07

8 points

Y00 to Y05

6 points

X000 to X027

24 points

Y000 to Y017

16 points

X000 to X027

24 points

Y000 to Y027

24 points

X00 to X013

12 points

Y00 to Y07

8 points

X000 to X043

36 points

Y000 to Y027

24 points

X000 to X037

32 points

Y000 to Y037

32 points

X000 to X177

128 points

Y000 to Y177

128 points

X00 to X17

16 points

Y00 to Y15

14 points

X000 to X177

128 points

Y000 to Y177

128 points

X000 to X047

40 points

Y000 to Y077

40 points

128

points

in total

2 Devices in Detail

2.2 Input/Output Relays [X and Y]

extension

128

points

in total

X000 to X077

64 points

Y000 to Y077

64 points

X000 to X267

184 points

Y000 to Y267

184 points

256

points

in total

Model name FX2NC-16M FX2NC-32M FX2NC-64M FX2NC-96M When extended

FX2NC PLC

0S/FX0/FX0N/FXU/FX2C PLCs

3. FX

FX0S/FX0 PLC

FX0N PLC

FXU PLC

Input

Output

Model name FX0S-10M FX0/FX0S-14M FX0/FX0S-20M FX0/FX0S-30M

Input

Output

Model name FX

Input

Output

Model name FXU-16M FXU-24M FXU-32M FXU-48M FXU-64M FXU-80M FXU-128M

Input

Output

X000 to X007

8 points

Y000 to Y007

8 points

X000 to X005

6 points

Y000 toY003

4 points

0N-24M FX0N-40M FX0N-60M When extended

X000 to X015

14 points

Y000 to Y011

10 points

X000 to X007

8 points

Y000 to Y007

8 points

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X007

8 points

Y000 to Y005

6 points

X000 to X027

24 points

Y000 to Y017

16 points

X000 to X013

12 points

Y000 to Y013

12 points

X000 to X037

32 points

Y000 to Y037

32 points

X000 to X013

Y000 to Y007

X000 to X043

Y000 to Y027

X000 to X017

16 points

Y000 to Y017

16 points

X000 to X057

48 points

Y000 to Y057

48 points

12 points

8 points

36 points

24 points

X000 to X027

Y000 to Y027

24 points

X000 to X267

184 points

Y000 to Y267

184 points

X000 to X017

16 points

Y000 to Y015

14 points

X000 to X127

84 points

Y000 to Y77

64 points

X000 to X037

32 points

Y000 to Y037

32 points

points

in total

extension

128

points

in total

X000 to X047

Y000 to Y047

256

40 points

X000 to X077

64 points

Y000 to Y077

64 points

FXU PLC

FX2C PLC

Model name When extended

Input

Output

X000 to X267

184 points

Y000 to Y267

184 points

2C-64M FX2C-96M FX2C-128M FX2C-160M When extended

X000 to X037

32 points

Y000 to Y037

32 points

Input

Output

Model name FX

256

points

in total

X000 to X057

48 points

Y000 to Y057

48 points

X000 to X077

64 points

Y000 to Y077

64 points

X000 to X117

80 points

Y000 to Y117

80 points

X000 to X267

184 points

Y000 to Y267

184 points

256

points

in total

Page 41

FXCPU Structured Programming Manual

[Device & Common]

2.2.2 Functions and roles

Examples of terminal names and wiring (sink input) are for the FX3U Series PLC.

2 Devices in Detail

2.2 Input/Output Relays [X and Y]

Device Outline

24V

S/S

Input

X000

signal

Input terminal

The PLC receives signals from external switches through input terminals. An input relay (X) connected to an input terminal inside the PLC is an electronic relay isolated optically, and has many normally-open (NO) contacts and normally-closed (NC) contacts. These contacts can be arbitrarily used inside the PLC. These input relays cannot be driven by programs.

X000

Program example

X000

Y000

PLC

X001

External power supply

COM1

Y000

NO contact

Y000

NC contact

The PLC outputs signals to external loads through output terminals. Contacts for external output (output devices such as relay contacts, TRIACs and transistors) of output relays are connected to output terminals inside the PLC. An output relay has many NO contacts and NC contacts. These contacts can be arbitrarily used inside the PLC. Differences in operations between external output contacts (output devices) and internal contacts are explained on the next page.

Y000

Load

Output terminal

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 42

FXCPU Structured Programming Manual

[Device & Common]

2.2.3 Operation timing of I/O relays

The PLC executes sequence control by repeatedly executing the following processing procedure. In this batch I/O method, not only are there driving times of input filters and output devices but also response delays caused by operation cycles.

2 Devices in Detail

2.2 Input/Output Relays [X and Y]

Input processing

X000

X001

X002

X000

Y000

1) Read-in

Input terminal

2) Read-out

Y000

M 0

Auxiliary relay

Input

image

memory

Program processing

3) Write

4) Read

-out

5) Write

Device

image

memory

1) 2) 3)...6) indicate the processing order.

Input processing

Before executing a program, the PLC reads the ON/OFF status of all input terminals inside the PLC into the input image memory. Even if inputs change while the PLC is executing the program, the contents of the input image memory remain unchanged, but the changes in inputs are read during the input processing in the next cycle. Even if an input contact changes from ON to OFF or from OFF to ON, its ON/OFF status is judged after the response delay (approximately 10 ms) caused by the input filter. (When the input filter is the digital type, its value can be overwritten by a sequence program.)

Program processing

The PLC reads the ON/OFF status of each device from the input image memory and other device image memories according to the contents of instructions in the program memory, executes operations in sequence from the step 0, and then writes the operation result to the image memory at each time. Accordingly, the contents of the image memory of each device change as the program is executed. The operation of a contact inside an output relay is determined by the contents of the output image memory.

Repeated operation

[The time required for a cyclic operation is called operation cycle (scan time).]

The above method is called the batch I/O method (or refresh method).

6) Output

Output

latch

memory

Output processing

Output terminal

Y000

Y001

Y002

Output processing

When execution of all instructions is finished, the ON/OFF status of the image memory of outputs (Y) is transferred to the latch memory. This is the actual output of the PLC. External output contacts inside the PLC operate after the response delay time of the output devices.

Page 43

FXCPU Structured Programming Manual

[Device & Common]

2.3 Auxiliary relay [M]

There are many auxiliary relays inside the PLC. Coils of auxiliary relays are driven by contacts of various devices inside the PLC in the same way as output relays. Auxiliary relays have many electronically normally-open contacts and normally-closed contacts which can be used arbitrarily inside the PLC. However, external loads cannot be driven directly by these contacts. External loads should be driven by output relays.

2.3.1 Numbers of auxiliary relays

2 Devices in Detail

2.3 Auxiliary relay [M]

Device Outline

Devices in

Detail

The table below shows auxiliary relay (M) numbers. (Numbers are assigned in decimal.)

1. FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

Latched (battery backed-up) type

M500 to M1023

524 points

Fixed latched (EEPROM

backed-up) type

M384 to M1535

1152 points

Fixed latched (EEPROM

backed-up) type

M384 to M511

128 points

FX3U/FX3UC PLC

FX3G/FX3GC PLC

FX3S PLC

General type

M0 to M499

500 points

General type

M0 to M383

384 points

General type

M0 to M383

384 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. The characteristics of latch (backup) cannot be changed using parameters.

*4. They can be changed to the latched (battery backed-up) type using parameters while an optional

battery is attached. However, the latched area cannot be set.

When simple N:N link or parallel link is used, some auxiliary relays are occupied for the link.

Fixed latched (battery

backed-up) type

M1024 to M7679

6656 points

General type Special type

M1536 to M7679

6144 points

General type Special type

M512 to M1535

1024 points

Special type

M8000 to M8511

512 points

M8000 to M8511

512 points

M8000 to M8511

512 points

→ Refer to the data communication manual.

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

2. FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

Fixed latched (backed-up) type

M384 to M511

128 points

M384 to M511

128 points

M512 to M1535

1024 points

Special type

M8000 to M8255

FX1S PLC

FX1N/FX1NC PLC

FX2N/FX2NC PLC

General

type

M0 to M383

384 points

M0 to M383

384 points

M0 to M499

500 points

Latched (battery backed-up) type

M500 to M1023

524 points

Battery backed-up EEPROM backed-up Capacitor backed-up

M1024 to M3071

2048 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. The characteristics of latch (backup) cannot be changed using parameters.

256 points

Page 44

FXCPU Structured Programming Manual

[Device & Common]

3. FX0S/FX0/FX0N/FXU/FX2C PLCs

2 Devices in Detail

2.3 Auxiliary relay [M]

General type Latched (backed-up) type

FX0S/FX0 PLC

FX0N PLC

FXU/FX2C PLC

FXU PLC (Ver.

2.30 or earlier) (Reference)

M0 to M495

496 points

M0 to M383

384 points

M0 to M499

500 points

M500 to M1023

524 points

For link Parent → Child:M800 to M899 Child → Parent:M900 to M999

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. This area is fixed to the latched (backed-up) type. (The contents can be cleared by the RST and ZRST

instructions.)

*4. This area is fixed to the non-latched (non-backed-up) type. The characteristics of latch (backup)

cannot be changed.

2.3.2 Functions and operation examples

1. General type

All of general type auxiliary relays turn OFF when the PLC is turned

M100

NO contact

OFF. When the ON/OFF status of auxiliary relays just before power interruption is required for control, use latched (backed-up) type auxiliary relays.

Fixed latched

(backed-up) type

M496 to M511

16 points

M384 to M511

128 points

M1024 to M1535

512 points

Special type

M8000 to M8254

57 points

M8000 to M8254

67 points

M8000 to M8255

173 points

M8000 to M8255

169 point

M100

NC contact

Auxiliary relay circuit

Page 45

FXCPU Structured Programming Manual

[Device & Common]

2. Latched (backed-up) type

When the power is turned OFF while the PLC is operating, all of output relays and general type auxiliary relays turn OFF. Even when the power is restored after that, all of output relays and general type auxiliary relays remain OFF except those whose input condition is ON. In some output relays and auxiliary relays, however, the ON/OFF status just before power interruption should be stored and then replicated when the power is restored, depending on control targets. In such a case, use latched (backed-up) type auxiliary relays. Latched (backed-up) type devices are backed up by a battery, EEPROM, etc. built in the PLC.

→ For details on the backup method against power interruption, refer to Section 1.2.

2 Devices in Detail

2.3 Auxiliary relay [M]

Device Outline

Devices in

Detail

X000

M600

X001

M600

The left figure shows an operation example of M600 (latched type device) in a self-holding circuit. When X000 turns ON and M600 turns ON in this circuit, M600 holds its operation by itself even if X000 turns OFF. Because M600 is a latched (backed-up) type device, it

Backup against power interruption

PLC

(self-holding circuit)

remains activated even when the operation is restarted after X000 has turned OFF due to power interruption. If a normally-closed contact of X001 is opened when the operation is restarted, however, M600 is deactivated.

X000

EN ENO

X001

EN ENO

PLC

Backup against power interruption

(set/reset circuit)

SET

RST

The left figure shows a circuit using the SET and RST instructions.

M600

1) Application example of latched (backed-up) type auxiliary relays

Left limit

Limit switch LS 1(X000)

Right limit

Limit switch LS 2(X001)

In some cases, the table should be restarted in the same direction as the direction selected just before power interruption.

Constant

Parameters

Specified the

Device &

Special Device

Errors

Types and

Setting of

Table in reciprocating motion

X000

M600

X001

M600

Rightward drive command

Motor

with brake

X000 = ON (at the left limit) → M600 = ON → The table is driven rightward. → The power is turned OFF. → The table stops in an intermediate position. → The table is restarted (M600 = ON). → X001 = ON (at the right limit) → M600 = OFF, M601 = ON → The table is driven leftward.

X001

M601

X000

M601

Leftward drive command

2) Method to use a fixed latched (backed-up) type auxiliary relay as a general type auxiliary relay When using a fixed latched (backed-up) type auxiliary relay as a general type auxiliary relay, provide a reset circuit shown in the figure below around the head step in the program.

M8002

Initial pulse

ZRST

EN ENO

d1 d2

M1024 M1999

Other Functions

Page 46

FXCPU Structured Programming Manual

[Device & Common]

2.4 State Relay [S]

State relays (S) are important devices to simply program stepping type process control, and are combined with the step ladder instruction STL.

2.4.1 Numbers of state relays

The table below shows state relay (S) numbers. (Numbers are assigned in decimal.)

1. FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

2 Devices in Detail

2.4 State Relay [S]

FX3U/FX3UC PLC

FX3G/FX3GC PLC

FX3S PLC

Initial state type General type

S0 to S9

10 points

Initial state (EEPROM

backed-up) type

S0 to S9 10 points

Initial state (EEPROM

backed-up) type

S0 to S9 10 points

S0 to S499

500 points

(S0 to S9 are provided

for the initial state.)

Latched (EEPROM

backed-up) type

S10 to S899

890 points

Fixed latched (EEPROM

backed-up) type

S10 to S127

118 points

Latched (battery

backed-up) type

S500 to S899

400 points

Annunciator (EEPROM

backed-up) type

S900 to S999

100 points

General type

S128 to S255

128 points

Fixed latched (battery

backed-up) type

S1000 to S4095

3096 points

General type

S1000 to S4095

3096 points

Annunciator type

S900 to S999

100 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. The characteristics of latch (backup) cannot be changed using parameters.

*4. They can be changed to the latched (battery backed-up) type using parameters while an optional

battery is attached. However, the latched area cannot be set.

2. FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

General type

FX1S PLC - -

FX1N/FX1NC PLC

FX2N/FX2NC PLC

(S0 to S9 are provided

S0 to S499

500 points

for the initial state.)

Latched (battery

backed-up) type

S500 to S899

400 points

Fixed latched (backed-up) type

EEPROM backed-up Capacitor backed-up

S0 to S127

128 points

(S0 to S9 are provided

for the initial state.)

S0 to S127

128 points

(S0 to S9 are provided

for the initial state.)

S128 to S999

872 points

Annunciator type

S900 to S999

100 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. The characteristics of latch (backup) cannot be changed using parameters.

Page 47

FXCPU Structured Programming Manual

[Device & Common]

3. FX0S/FX0/FX0N/FXU/FX2C PLCs

2 Devices in Detail

2.4 State Relay [S]

Device Outline

General type Latched (backed-up) type

S0 to S63

FX0S/FX0 PLC

FX0N PLC - -

FXU/FX2C PLC

(S0 to S9 are provided for the

64 points

initial state.)

S0 to S499

500 points

initial state.)

(S10 to S19 are provided for

zero return.)

S500 to S899

400 points

---

Fixed latched (backed-up)

(S0 to S9 are provided for the

type

S0 to S127

128 points

initial state.)

Annunciator type

S900 to S999

100 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. This area is fixed to the latched (backed-up) type. (The contents can be cleared by the RST and ZRST

instructions.)

*4. This area is fixed to the non-latched (non-backed-up) type. The characteristics of latch (backup)

cannot be changed.

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 48

FXCPU Structured Programming Manual

[Device & Common]

2.4.2 Functions and operation examples

1. General type

M8002

Start

X000

S20

Lower limit

X001

SET

EN ENO

STL

EN ENO

SET

EN ENO

STL

EN ENO

Moving down

Y000

SET

EN ENO

S20

S21

S2 process

S20 process

2 Devices in Detail

2.4 State Relay [S]

In the stepping type process control shown in the left figure, when the start signal X000 turns ON, the state relay S20 is set (turned ON) and the solenoid valve Y000 for moving down is activated. When the lower limit switch X001 turns ON, the state relay S21 is set (turned ON) and the solenoid valve Y001 for clamping is activated. When the clamp confirmation limit switch X002 turns ON, the state relay S22 is set (turned ON). When the operation proceeds to the next step, the state relay in the preceding step is automatically reset (turned OFF).

When the PLC is turned OFF, all of general type state relays are turned OFF. When the ON/OFF status just before power interruption is required for restart, use latched (backed-up) type state relays.

STL

EN ENO

S21

Clamping

S21 process

S22

S22 process

Clamping

X002

Upper limit

X003

S22

Y001

SET

EN ENO

STL

EN ENO

Moving up

Y002

SET

EN ENO

State relays have many normally-open contacts and normally-closed contacts in the same way as auxiliary relays, and these contacts can be used arbitrarily in sequence programs. When state relays (S) are not used for step ladder instructions, they can be used in general sequences in the same way as auxiliary relays (M) (as shown in the right figure).

X001

S10

M30

Y005

Page 49

FXCPU Structured Programming Manual

[Device & Common]

2. Latched (backed-up) type

• Latched (backed-up) type state relays store their ON/OFF status even if the power is shut down while the

PLC is operating, so the operation can be restarted after shutdown from the previous last point in the process. Latched (backed-up) type state relays are backed up by a battery, EEPROM, etc. built in the PLC.

• When using latched (backed-up) type state relays as

general type state relays, provide a reset circuit shown in the right figure around the head step in the program.

3. Annunciator type

Annunciator type state relays can be also used as outputs for external fault diagnosis.

For example, when an external fault diagnosis circuit shown in the figure below is created and the contents of the special data register D8049 are monitored, the smallest number out of the active state relays S900 to S999 is displayed. If two or more faults have occurred, the smallest state relay number having a fault is displayed at first. When the displayed fault is cleared, the next smallest state relay number having a fault is stored in D8049 and displayed.

M8000

M8049

EN s m

ANS

ENO

RUN monitor

X000Y000

K10

2 Devices in Detail

2.4 State Relay [S]

→ For details on each backup method, refer to Section 1.2.

ZRST

EN ENO

S1000 to S1200 are initialized.

S900

M8002

Initial pulse

When the special auxiliary relay M8049 is driven, monitoring becomes valid.

If the forward end detection input X000 is not activated within 1 second after the forward output Y000 is driven, S900 is activated.

d1 d2

S1000 S1200

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

X002X001

K20

X004X003

K100

M8048

X005

ANS

EN s m

EN ENO

ENO

ANS

ENO

Y010

ANRP

If both the upper limit detection input X001 and the lower limit

S901

S902

detection input X002 are deactivated at the same time for 2 seconds or more, S901 is activated.

In a machine whose takt time is less than 10 seconds,if the switch X004 which is designed to be activated during one-cycle operation of the machine is not activated while the continuous operation mode input X003 is ON, S902 is activated.

When any of annunciator type state relays S900 to S999 turns ON, the special auxiliary relay M8048 is activated and the fault display output Y010 is activated.

The state relays activated by the external fault diagnosis program can be turned OFF by the reset button X005. Every time X005 is set to ON, the active annunciator type state relay having the smallest number is reset in turn.

While the special auxiliary relay M8049 is not driven, annunciator type state relays can be used as latched (backed-up) type state relays in sequence programs in the same way as general type state relays.

Types and

Setting of

Parameters

Other Functions

Page 50

FXCPU Structured Programming Manual

[Device & Common]

2.5 Timer [T]

Timers add and count clock pulses of 1 ms, 10 ms, 100 ms, etc. inside the PLC. When the count value reaches a specified set value, the output contact of the timer turns ON. A set value can be directly specified by a constant (K) in the program memory, or indirectly specified by the contents of a data register (D). In timers, "TS" indicates a contact, "TC" indicates a coil, and "TN" indicates the current value.

→ Refer to the Q/L/F Structured Programming Manual (Fundamentals).

2.5.1 Numbers of timers

The table below shows timer (T) numbers. (Numbers are assigned in decimal.)

1. FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

2 Devices in Detail

2.5 Timer [T]

FX3U/ FX3UC PLC

FX3G/ FX3GC PLC

FX3S PLC

For 100 ms pulses

0.1 to 3276.7 sec

T0 to T199 200 points

----------------------------

Routine program type

T192 to T199

For 100 ms pulses

0.1 to 3276.7 sec

T0 to T199

200 points

----------------------Routine program

type T192 to T199

For 100 ms pulses

0.1 to 3276.7 sec

T0 to T62

63 points

For 10 ms pulses

0.01 to 327.67 sec

T200 to T245

46 points

For 10 ms pulses

0.01 to 327.67 sec

T200 to T245

46 points

For 100/10 ms

pulses

0.1 to 3276.7 sec

0.01 to 327.67 sec

T32 to T62

31 points

Retentive type for

1 ms pulses

0.001 to 32.767 sec

T246 to T249

4 points

Interrupt execution

latched (backed-up)

type*

Retentive type for

1 ms pulses

0.001 to 32.767 sec

T246 to T249

Interrupt execution

latched (backed-

For 1 ms pulses

0.001 to 32.767

T63 to T127

4 points*

up) type

sec

65 points

Retentive type for 100

0.1 to 3276.7 sec

Latched (backed-up)

Retentive type for

100 ms pulses

0.1 to 3276.7 sec

T250 to T255

Latched (backed-

Retentive type for

1 ms pulses

0.001 to 32.767

T128 to T131

Interrupt execution

latched (backed-

6 points

up) type

sec

4 points

up) type

ms pulses

T250 to T255

6 points

type

For 1 ms pulses

0.001 to 32.767

T256 to T319

64 points

Retentive type for

100 ms pulses

0.1 to 3276.7 sec

T132 to T137

6 points

Latched (backed-

up) type

0.001 to 32.767 sec

sec

For 1 ms pulses

T256 to T511

256 points

Variable

potentiometer

type

Numeric value

from 0 to 255

2 built-in points

(Only in FX3G

PLC)

Variable

potentiometer

type

Numeric value

from 0 to 255

2 built-in points

Timer numbers not used for timers can be used as data registers for storing numeric values.

*1. Retentive type timers are backed up by the battery in FX

*2. Retentive type timers are backed up by the EEPROM memory (built in PLC) in FX

3U/FX3UC PLCs.

3S/FX3G/FX3GC

PLCs.

*3. 100 ms timers are changed to 10 ms timers when the special auxiliary relay M8028 is driven.

*4. This function is not supported in the FX

3S-30M/E-2AD PLC.

Page 51

FXCPU Structured Programming Manual

[Device & Common]

2. FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

2 Devices in Detail

2.5 Timer [T]

Device Outline

FX1S PLC

FX1N/ FX1NC PLC

FX2N/ FX2NC PLC

For 100 ms pulses

0.1 to 3276.7 sec

T0 to T31

32 points

T0 to T199

200 points

T0 to T199

200 points

----------------------Routine program

type T192 to T199

For 100/10 ms

pulses

0.1 to 3276.7 sec

0.01 to 327.67 sec

T32 to T62

31 points

For 10 ms pulses

0.01 to 327.67 sec

T200 to T245

46 points

T200 to T245

46 points

For 1 ms pulses

0.001 to 32.767 sec

T63

1 point

T246 to T249

4 points

Capacitor latched

(backed-up) type

(Retentive type)

T246 to T249

4 points

Interrupt execution

latched (backed-up)

type

(Retentive type)

Retentive type

for 100 ms

pulses

0.1 to 3276.7 sec

T250 to T255

6 points

Capacitor latched

(backed-up) type

T250 to T255

6 points

Capacitor latched

(backed-up) type

Timer numbers not used for timers can be used as data registers for storing numeric values.

*1. 100 ms timers are changed to 10 ms timers when the special auxiliary relay M8028 is driven.

3. FX0S/FX0/FX0N/FXU/FX2C PLCs

Retentive type for

100 ms pulses

0.1 to 3276.7 sec

T250 to T255

6 points

Variable potentiometer type

Numeric value from 0 to 255

8 points for function board

FX0S/FX0 PLC

FX0N PLC

FXU/FX2C PLC

For 100 ms pulses

0.1 to 3276.7 sec

T0 to T55

56 points

T0 to T62

63 points

Routine program

type T192 to T199

For 10 ms pulses

0.01 to 327.67 sec

(T32 to T55)

(24 points)

(T32 to T62)

(31 points)

T200 to T245

46 points

For 1 ms pulses

0.001 to 32.767 sec

- - 1 built-in point

T63 - 2 built-in points

T246 to T249

4 points

Retentive type

Interrupt execution

Variable

potentiometer

type

Numeric value

from 0 to 255

2 built-in points

8 points for function board (Only in FX1S/

FX1N PLCs)

8 points for function board

(Only in FX2N

PLC)

Constant

Parameters

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Timer numbers not used for timers can be used as data registers for storing numeric values.

*1. 100 ms timers are changed to 10 ms timers when the special auxiliary relay M8028 is driven.

In FX

0 PLCs, this function is available in Ver. 1.01 and later.

*2. They are backed up against power interruption.

Other Functions

Page 52

FXCPU Structured Programming Manual

[Device & Common]

2.5.2 Functions and operation examples

1. General type

X000

TC200

K123

TS200

1.23 sec

X000

Current value

Y000

OUT_T

EN ENO TCoil TValue

Y000

Set value

Set value (constant) A data register can be specified instead.

2 Devices in Detail

2.5 Timer [T]

When the drive input X000 of the timer T200 turns ON, the current value counter for T200 adds and counts clock pulses of 10 ms. When the count value becomes equivalent to the set value K123, the output contact of the timer turns ON. In other words, the output contact turns ON 1.23 seconds after the coil is driven. When the drive input X000 turns OFF or when the power is turned OFF, the timer is reset and the output contact turns OFF.

• The program of 100 ms/10 ms type timer of the FX

0S, FX0, FX0N, FX1S and FX3S PLCs.

100 ms timers are changed to timers which operate based on the 10 ms base clock when the special auxiliary relay M8028 is driven in the program.

M8000 M8028

RUN monitor

X003

TC32

K100

1-second timer

OUT_T

EN ENO TCoil TValue

2. Retentive type

X000

TS250

X002

X001

Current value

Y001

X002

Retentive time

EN ENO

TC250

K345

Retentive time

TCoil TValue

t1 + t2 = 34.5 sec

OUT_T

Y001

RST

EN ENO

Set value

Set value (constant) A data register can be specified instead.

TC250

When the drive input X001 of the timer T250 turns ON, the current value counter for T250 adds and counts clock pulses of 100 ms. When the count value becomes equivalent to the set value K345, the output contact of the timer turns ON. Even if the drive input X001 turns OFF or if the power is turned OFF during counting, the timer continues counting when the operation restarts. The retentive operating time is 34.5 seconds. When the reset input X002 turns ON, the timer is reset and the output contact turns OFF.

Page 53

FXCPU Structured Programming Manual

[Device & Common]

3. Variable potentiometer type

• Program for built-in analog variable potentiometers Program values for built-in analog variable potentiometers are stored in the following special data registers as numeric data within the range from 0 to 255 in accordance with the scale position. Values received as numeric values can be specified as the indirectly specified value for a timer to provide variable potentiometer type analog timers.

[Special data registers]

2 Devices in Detail

2.5 Timer [T]

Device Outline

Devices in

Detail

•FX1S, FX1N, FX3S*1, FX3G PLC

VR1→D8030 VR2→D8031

[Example of basic circuit] [Example of applied circuit]

X003

TC10

D8030

Data register which stores an analog variable potentiometer value (integer in range from 0 to 255)

*1. FX

3S-30M/E-2AD are not applicable to built-in analog variable potentiometers.

OUT_T

EN ENO TCoil TValue

•FX0S, FX0 PLC D8013

(0 to 25.5 sec)

M8000

RUN monitor

X003

The set value range can be changed (to "32,767" maximum) by multiplying the contents of the data register by "n". Do not use D1 in other programs.

D8031

TC10

•FX0N PLC

VR1→D8013(D8030) VR2→D8031

MUL_E EN _IN

_IN

EN ENO TCoil TValue

(0 to 51 sec)

ENO

OUT_T

[Value of D8031 (VR2)] 2 Transferred to (D1, D0)

• Program for analog variable potentiometers on function board Values of analog variable potentiometers which can be built in the PLC as a function board can be received as numeric data in the range from 0 to 255 in accordance with the scale position. Values received as numeric values can be specified as timer function values to provide variable potentiometer type analog timers. Use the VRRD function to put analog variable potentiometer values into the PLC.

X000

VRRD

ENsENO

The analog value of the variable potentiometer No. 0 is converted into 8-bit binary value, and the value in the range from 0 to 255 is transferred to D0.

D0K0

In this example, D0 is used as the timer set value.

X001

TC0

OUT_T

EN ENO TCoil TValue

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Use the VRSC instruction to put the value of an analog variable potentiometer as a numeric value in the range from 0 to 10 in accordance with the scale position.

Page 54

FXCPU Structured Programming Manual

[Device & Common]

2.5.3 Set value specification method

1. Specification using a constant (K)

X003

TC10 K100

2. Indirect specification using a data register

X001

K100

X003

TC10

OUT_T

EN ENO TCoil TValue

Constant (decimal integer) 10-sec timer

MOV

ENsENO

OUT_T

EN ENO TCoil TValue

2 Devices in Detail

2.5 Timer [T]

T10 is a timer for 100 ms (0.1 s) pulses. When the constant "100" is specified, T10 works as a 10-second timer (0.1 sec × 100 = 10 sec).

Write in advance a value to the data register used for indirect specification in a program, or set such a value in advance using a digital switch. Note that the set value of a latched (backed-up) type register can be indefinite when the battery voltage becomes low.

D5=K100 10-sec timer

2.5.4 Cautions on use

1) Use timers T192 to T199 in subroutines and interrupt routines. These timers execute counting when a coil

instruction or END instruction is executed. Once the count value of such a timer has reached the set value, the timer output contact turns ON when a coil instruction or END instruction is executed. Because general type timers execute counting only when a coil instruction is executed (refer to "2.5.5 Details of timer operations and timer accuracy" below), they do not operate normally if they are used in subroutines or interrupt routines in which a coil instruction is executed only in a certain condition.

2) If a retentive type timer for 1 ms pulses is used in a subroutine or interrupt routine, its output contact turns

ON when the first coil instruction is executed after its count value has reached the set value.

3) For writing the symbolic information and changing the set values of timers and counters using a

peripheral equipment, it is recommended to create programs with the set values specified indirectly. If the set values are specified directly, programs cannot be restored from the symbolic information after

the set values are changed.

2.5.5 Details of timer operations and timer accuracy

A timer (except interrupt execution type) starts counting when the coil is driven, and its output contact turns ON when the first coil instruction is executed after the timer has reached timeout.

Counting operation (If the operation cycle is long, it automatically counts two or more clocks.)

X010

TS0

TC0 K12

Input processing

OUT_T

EN ENO TCoil TValue

Y010

X010=OFF ON

Timer starts counting.

1st cycle

Contact is not activated at this point.

T 0

1.2

sec

timeout

2nd cycle "n"th cycle "n+1"th cycle

Contact is activated.

Y010 ON

Page 55

FXCPU Structured Programming Manual

[Device & Common]

As shown in the above operation diagram, the accuracy of operation of the timer contact after the coil is driven until the contact turns ON is shown in the following outline expression:

:0.001 sec (timer for 1 ms), 0.01 sec (timer for 10 ms) or 0.1 sec (timer for 100 ms)

If the contact is programmed before the timer coil, "+2T0" results in the worst case. When the timer set value is "0", the output contact turns ON when a coil instruction is executed in the next cycle. An interrupt execution type timer for 1 ms pulses counts clock pulses of 1 ms as an interrupt processing after a coil instruction has been executed.

T :Timer set value (sec)

:Operation cycle (sec)

2 Devices in Detail

2.5 Timer [T]

Device Outline

Devices in

Detail

2.5.6 Program examples [Off-delay timer and flicker timer]

Off-delay timer

X001

TS5

X001Y000

TC5

K200

Y000

OUT_T

EN ENO TCoil TValue

X001

Y000

Flicker timer

X001 TS2

TC1 K20

TS1

TC2 K10

OUT_T

EN ENO TCoil TValue

OUT_T

EN ENO TCoil TValue

Y000

In addition, the flicker operation can be performed by the ALT instruction.

X001

2 sec 1 sec

T1 T2 T1

Y000

T 2

( )

T5 (20 sec)

2 sec

One operation cycle

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Multi-timer using the STMR instruction

Off-delay timers, one-shot timers and flicker timers can be easily created using this instruction.

Off-delay timer and one-shot timer

EN s m

STMR

ENO

10 sec10 sec

•

The value specified in "m" is handled as

the set value of a timer specified in input variable . The set value is "10 sec." in this example.

•

M0 is an off-delay timer.

•

M1 is a one-shot timer which operates after the input turns OFF from ON.

•

M2 and M3 are flicker timers, and connected as shown in the program example below for flicker.

X000

M 0

M 1

M 2

M 3

X000

T10 M0

K100

10 sec 10 sec

10 sec

Page 56

FXCPU Structured Programming Manual

[Device & Common]

Flicker timer

2 Devices in Detail

2.5 Timer [T]

X000 M3

T10 M0

K100

X000

M 2

M 1

EN s m

STMR

ENO

In addition, the timer time can be set according to the switch input time using the teaching timer instruction TTMR.

2.5.7 Handling timers as numeric devices

In timers, the output contact operating in accordance with the set value is used in some cases, and the current value is used as numeric data for control in other cases. The figures below show the structure of timer current value registers. When a timer number is specified in an input variable of an instruction, the timer is handled as a device which stores 16-bit or 32-bit data in the same way as data registers.

1. Structure of timer current value registers

1) 16-bit

•

When M3 is connected as shown in the left figure, M2 and M1 become flicker outputs.

•

When X000 is set to OFF, M0, M1 and M3 turn OFF and T10 is reset after the set time.

•

Do not use the timers used here in other general circuits again.

2,048

4,096

16 bit

512

1,024

256

128

1010101010101010

Available numeric value range 16-bit:0 to 32,767 32-bit:-2,147,483,648 to +2,147,483,647

High order Low order

b15

Sign 0 : Positive

1 : Negative

*1.The sign is valid only when a timer is handled as a substitute for a data register.

8,192

16,384

2) 32-bit

262,144

524,288

32 bit

1010101010101010

32,768

65,536

131,072

8,192

16,384

2,048

4,096

512

1,024

256

128

0000111100001111

High order Low orde

b31 b0

Sign 0 : Positive

1 : Negative

67,108,864

134,217,728

268,435,456

536,870,912

1,073,741,824

8,388,608

16,777,216

33,554,432

1,048,576

2,097,152

4,194,304

2. Use examples

For the full use of timers as numeric devices, refer to the instruction explanation manual offered separately.

→ FX Structured Programming Manual [Basic & Applied Instruction]

Page 57

FXCPU Structured Programming Manual

[Device & Common]

2.6 Counter [C]

In counters, "CS" indicates a contact, "CC" indicates a coil, and "CN" indicates the current value.

→ Refer to the Q/L/F Structured Programming Manual (Fundamentals).

2 Devices in Detail

2.6 Counter [C]

Device Outline

2.6.1 Numbers of counters

The tables below show counter (C) numbers. (Numbers are assigned in decimal.)

1. In FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

Counting range: 0 to 32767

General type

FX3U/FX3UC PLC

FX3G/FX3GC PLC

FX3S PLC

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

C0 to C99

100 points

General type

C0 to C15

General type

C0 to C15

Counting range: 0 to 32767

16 points

Counting range: 0 to 32767

16 points

16-bit up-counter

Latched (battery backed-

16-bit up-counter

Fixed latched (EEPROM

16-bit up-counter

Fixed latched (EEPROM

up) type

C100 to C199

100 points

keep) type

C16 to C199

184 points

keep) type

C16 to C31

16 points

→ For high speed counters, refer to Section 2.7.

32-bit bi-directional counter

-2,147,483,648 to +2,147,483,647

General type

C200 to C219

General type

C200 to C219

20 points

32-bit bi-directional counter

-2,147,483,648 to +2,147,483,647

20 points

32-bit bi-directional counter

-2,147,483,648 to +2,147,483,64732

Latched (battery backed-

C220 to C234

Fixed latched (EEPROM

C220 to C234

General type

C200 to C234

35 points

up) type

15 points

keep) type

15 points

Constant

Parameters

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

2. In FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

16-bit up-counter

Counting range: 0 to 32767

FX1S PLC

FX1N/FX1NC PLC

FX2N/FX2NC PLC

General type

C0 to 15

16 points

100 points

C0 to C15

C0 to C99

Latched

(backed-up)

type

Battery

backed-up

C100 to C199

100 points

Fixed latched (backed-up) type

EEPROM

backed-up

C16 to C31

16 points

C16 to C31

16 points

Capacitor

backed-up

C32 to C199

168 points

General type

--- -

C200 to C219

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. The characteristics of latch (backup) cannot be changed using parameters.

Counter numbers not used as counters can be used as data registers to store numeric values.

32-bit bi-directional counter

-2,147,483,648 to +2,147,483,647

Latched

(backed-up)

type

Battery

backed-up

20 points

C220 to C234

15 points

Fixed latched

(backed-up)

C220 to C234

type

Capacitor

backed-up

15 points

Other Functions

Page 58

FXCPU Structured Programming Manual

[Device & Common]

3. In FX0S/FX0/FX0N/FXU/FX2C PLCs

2 Devices in Detail

2.6 Counter [C]

General type

FX0S/FX0 PLC

FX0N PLC

FXU/FX2C PLC

C0 to 13

14 points

C0 to C15

16 points

C0 to C99

100 points

*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter

setting.

*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by

parameter setting.

*3. This area is fixed to the latched (backed-up) type. (The contents can be cleared by the RST and ZRST

instructions.)

*4. This area is fixed to the non-latched (non-backed-up) type. The characteristics of latch (backup)

cannot be changed.

Counter numbers not used as counters can be used as data registers to store numeric values.

2.6.2 Features of counters

The table below shows the features of 16-bit counters and 32-bit counters. These counters can be used in accordance with the operating condition such as counting direction switching and counting range.

Item 16-bit counter 32-bit counter

Counting direction Up-counting

Set value 1 to 32767 -2,147,483,648 to +2,147,483,647

Set value specification

Current value change

Output contact Latches the operation status after counting up.

Reset operation When the RST instruction is executed, the current value of counter is reset to "0" and the output contact turns OFF.

Current value register

Constant (K) or data register Constant (K) or a pair of data registers

Does not change after counting up. Changes even after counting up (ring counter).

16-bit 32-bit

16-bit up-counter

Counting range: 0 to 32767

Latched (backed-up)

type

C100 to C199

100 points

32-bit bi-directional counter

-2,147,483,648 to +2,147,483,647

Fixed latched

(backed-up) type

C14 to C15

2 points

C16 to C31

16 points

Up-counting and down-counting can be switched (refer to Subsection 2.6.3).

Latches the operation status (in up-counting), or is reset (in down-counting).

General type

C200 to C219

20 points

Latched (backed-up)

type

C220 to C234

15 points

2.6.3 Related devices (to specify counting direction) [32-bit counter]

FX0S/FX0/FX0N PLCs do not support 32-bit counters.

When an auxiliary relay for switching the counting direction is set to ON, the counter executes down-counting. When the auxiliary relay is set to OFF, the counter executes up-counting.

Counting

Counter No.

C200 M8200 C210 M8210 C220 M8220 C230 M8230

C201 M8201 C211 M8211 C221 M8221 C231 M8231

C202 M8202 C212 M8212 C222 M8222 C232 M8232

C203 M8203 C213 M8213 C223 M8223 C233 M8233

C204 M8204 C214 M8214 C224 M8224 C234 M8234

C205 M8205 C215 M8215 C225 M8225

C206 M8206 C216 M8216 C226 M8226

C207 M8207 C217 M8217 C227 M8227

C208 M8208 C218 M8218 C228 M8228

C209 M8209 C219 M8219 C229 M8229

direction

switching

relay

Counter No.

Counting direction

switching

relay

Counter No.

Counting

direction

switching

relay

Counter No.

Counting direction

switching

relay

Page 59

FXCPU Structured Programming Manual

[Device & Common]

2.6.4 Functions and operation examples

1. General type and latched (backed-up) type 16-bit counters

• The valid setting rage of 16-bit binary up-counter is from K1 to K32767 (decimal constant). K0 causes the same operation as K1, and the output contact turns ON at the first counting.

• In general type counters, the count value is cleared when the PLC is turned OFF. In latched (backed-up) type counters, the count value just before power interruption is stored. The count value in the subsequent operation can be added to the previous last count value.

• Every time the coil C0 is driven by the counting input X011, the current value of the counter increases. When a coil instruction is executed 10 times, the output contact turns ON. After that, the current value of the counter does not change even if the counting input X011 turns ON. When the reset input X010 turns ON and then the RST instruction is executed, the current value of the counter is reset to "0" and the output contact turns OFF.

2 Devices in Detail

2.6 Counter [C]

Constant

Device Outline

Devices in

Detail

Specified the

Device &

X010

X011

CS0

EN ENO

OUT_C

EN ENO

CC0

CCoil

K10

CValue

Set value (constant) The set value can be indirectly specified instead.

Y000

RST

X010

X011

Current value

Y000

• The counter set value can be set directly by a constant (K) as shown above, or specified indirectly by a data register number. For example, when D10 is specified and the contents of D10 are "123", it is equivalent to "K123".

• If data beyond the set value is written to the current value register by the MOV instruction, etc., the OUT coil turns ON and the current value register becomes the set value when the next counting input is received.

• In a latched (backed-up) type counter, the current value, output contact operation status and reset status of the counter are latched (backed up) by a battery, EEPROM, etc. built in the PLC.

→ For details on backup methods against power interruption, refer to Section 2.6.

2. General type and latched (backed-up) type 32-bit bidirectional counters

The valid setting range of 32-bit binary bidirectional counters is from -2,147,483,648 to +2,147,483,647 (decimal constant). The counting direction (up or down) is specified by special auxiliary relays M8200 to M8234.

• When M8UUU is driven for the counter CUUU, the counter executes down-counting. When M8UUU is not driven for the counter CUUU, the counter executes up-counting. (Refer to the previous page.)

• The (positive or negative) set value can be specified by a constant (K) or the contents of data registers (D). When data registers are used, 32-bit data composed of a pair of serial data registers is handled as the set value. However, when handling 32-bit data in structured programs, it is not allowed to specify 16-bit data registers directly, different from simple projects. (Because 32-bit counters have 32-bit length, it is allowed to specify 32-bit data directly.) Use a label when handling 32-bit data. For example, when specifying 32-bit data using two data registers D1 and D0, define D0 using a global label.

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 60

FXCPU Structured Programming Manual

[Device & Common]

• When the coil C200 is driven by the counting input X014, the counter starts up-counting or down-counting. When the current value of the counter increases from "-6" to "-5", the output contact turns ON. When the current value decreases from "-5" to "-6", the output contact turns OFF.

X012

M8200

X013

X014

CC200

CS200

EN ENO CCoil

K-5

CValue

Set value (constant) The set value can be indirectly specified instead.

• The current value increases or decreases without regard to the operation of the output contact. When the counter executes up-counting from "2,147,483,647", the count value becomes "-2,147,483,648". In the same way, when the counter executes down-counting from "-2,147,483,648", the count value becomes "2,147,483,647". (This type of counter is called ring counter.)

• When the reset input X013 turns ON and then the RST instruction is executed, the current value of the counter is reset to "0" and the output contact turns OFF.

• In a latched type counter, the current value, output contact operation status and reset status of the counter are latched (backed up) by a battery, etc. in the PLC.

→ For details on backup methods against power interruption, refer to Section 1.2.

• A 32-bit counter can be used as a 32-bit data register. 32-bit counters cannot be handled as target devices in 16-bit applied instructions.

• If data beyond the set value is written to the current value register by the DMOV instruction, etc., the counter continues counting and the contact does not change when the next counting input is received.

RST

EN ENO

OUT_C_32

Y001

C200

Up-counting

X012

X013

X014

Current value

When output contact has been already turned ON.

Y001

454

Down-counting

2 Devices in Detail

2.6 Counter [C]

Up-counting

-1

-2

-3

-4

-5

-6

-7

-8

-3

-4

-5

-6

2.6.5 Set value specification method

1. 16-bit counter

1) Direct specification using a constant (K)

X003

CC0

K100

2) Indirect specification using a data register (D)

X001

X003

CC0

OUT_C

EN ENO CCoil CValue

Constant (decimal constant)1 to 32,767 100 counts

MOV

ENsENO

K100

OUT_C

EN ENO CCoil CValue

D5:100 100 counts

Write in advance a value to the data register used for indirect specification in a program, or set such a value in advance using a digital switch.

Note that the set value of a latched (backed-up) type register can be indefinite when the battery voltage becomes low.

Page 61

FXCPU Structured Programming Manual

[Device & Common]

2. 32-bit counter

1) Direct specification using a constant (K)

2 Devices in Detail

2.6 Counter [C]

Device Outline

X003

CC200

K43210

2) Indirect specification using a data register (D)

X001

K43210

X003

CC200

*1 Make sure data registers used for indirect specification are not used in other programs.

2.6.6 Cautions on use

For writing the symbolic information and changing the set values of timers and counters using a peripheral equipment, it is recommended to create programs with the set values specified indirectly. If the set values are specified directly, programs cannot be restored from the symbolic information after the set values are changed.

OUT_C_32

EN ENO CCoil CValue

Constant (decimal constant)-2,147,483,648 to +2,147,483,647 43210 counts

DMOV

OUT_C_32

EN ENO CCoil

CValue

ENsENO

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

2.6.7 Response speed of counters

Counters execute counting by cyclic operation for contact operations of signals X, Y, M, S, C, etc. inside the PLC. For example, when X011 is used for counting input, its ON duration and OFF duration should be longer than the scan time of the PLC (which is several tens Hz or less usually). On the other hand, high speed counters described later execute counting as an interrupt processing for specific input, and can execute counting at several kHz without regard to the scan time.

2.6.8 Counters handled as numeric devices

Counters use output contacts which operate in accordance with the set value, or use the count value (current value) as numeric data for control. The figures below show the structure of current value registers of counters. When a counter number is specified in an input variable of an instruction, the counter is handled as a device which stores 16-bit or 32-bit data in the same way as data registers. A 32-bit counter is handled as 32-bit data.

→ For high speed counters, refer to Section 2.7.

Types and

Setting of

Parameters

Other Functions

Page 62

FXCPU Structured Programming Manual

[Device & Common]

1. Structure of the current value register of a counter

1) 16-bit

2 Devices in Detail

2.6 Counter [C]

2,048

4,096

16-bit

512

1,024

256

128

Available numeric value range

1010101010101010

16-bit:0 to 32,767 32-bit:-2,147,483,648 to +2,147,483,647

High order Low order

b15

Sign 0 : Positive

1 : Negative

*1.The sign is valid only when a timer is handled as a substitute for a data register.

8,192

16,384

2) 32-bit

131,072

262,144

524,288

32-bit

1010101010101010

65,536

16,384

32,768

4,096

8,192

1,024

2,048

512

256

128

Low orde

0000111100001111

High order

b31 b0

Sign 0 : Positive

1 : Negative

67,108,864

134,217,728

268,435,456

536,870,912

1,073,741,824

16,777,216

33,554,432

2,097,152

4,194,304

8,388,608

1,048,576

2. Use examples in applied instructions

For the full use of counters as numeric devices, refer to the instruction explanation manual offered separately.

→ FX Structured Programming Manual [Basic & Applied Instruction]

MOV

CN20

K100 CN30

ENsENO

CMP

EN s1 s2

ENO

D10

CN20 (current value) is transferred to D10.

A decimal integer "100" is compared with CN30 (current value), and the comparison result is output to M0 to M2.

CN10

CN5 K2

CN200

K100

K20000

CN200

BCD

ENsENO

MUL_E EN _IN

_IN

DMOV

ENsENO

DZCP

EN s1 s2 s3

ENO

The contents of CN10 (current value) are converted into BCD, and output to Y000 to Y007

K2Y000

M10

(to control the 7-segment display unit).

CN5 (current value) is multiplied by "2", and the obtained value is transferred to (D5, D4).

CN200 (current value) is transferred to (D1, D0).

CN200 (current value) is compared with a decimal integer zone "100 to 20000", and the comparison result is output to M10 to M12.

Page 63

FXCPU Structured Programming Manual

[Device & Common]

3. Caution on simultaneous instances of the ZRST instruction and a counter

The ZRST instruction resets also the last stage and reset state of T and C coils. Accordingly, if the drive contact of X000 is ON in the following program, the counter executes counting after the ZRST instruction is executed.

Structured ladder/FBD

X000

CC0

K10

ZRST

EN ENO

d1 d2

RST

EN ENO

OUT_C

EN ENO CCoil CValue

C0 C100

Program in the following way to disable counting after execution of the ZRST instruction.

Timing chart

X000

Current

value of C0

one operation

cycle

OUT_C instruction

execution

ZRST instruction

execution

one operation

cycle

OUT_C instruction

execution

one operation

cycle

2 Devices in Detail

2.6 Counter [C]

one operation

cycle

OUT_C instruction

execution

Counting is executed when X000 is ON.

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

X000

ZRST

EN ENO

d1 d2

RST

EN ENO

MEP

EN ENO

C0 C100

OUT_C

EN ENO

CC0

CCoil

K10

CValue

Errors

Types and

Setting of

Parameters

Other Functions

Page 64

FXCPU Structured Programming Manual

[Device & Common]

2.7 High Speed Counter [C]

2.7.1 Types and device numbers of high speed counters

1. Types of high speed counters

The PLC main unit has built-in 32-bit high speed bidirectional counters (1-phase 1-counting, 1-phase 2counting and 2-phase 2-counting). These high speed counters are classified into the hardware type and the software type according to the counting method. Some high speed counters can be used together with an external reset input terminal and external start input terminal (for counting start).

2. Classification of high speed counters according to the counting method

• Hardware counters :These types of counters execute counting using hardware, but are switched to software counters depending on the operation condition.

→ For the condition handled as software counters, refer to Subsection 2.7.9.

• Software counters : These types of counters execute counting through CPU interrupt processing. It is necessary to use each software counter within restrictions of both the maximum response frequency and the total frequency.

→ For restriction of the response frequency depending on the total frequency, refer to Subsection

2 Devices in Detail

2.7 High Speed Counter [C]

2.7.10.

3. Types of high speed counters and input signal forms

The table below shows the types (1-phase 1-counting, 1-phase 2-counting and 2-phase 2-counting) and input signals (waveforms) of high speed counters.

Input signal form Counting direction

The ON/OFF status of M8235 to M8245

1-phase 1-counting input

1-phase 2-counting input

2-phase 2-counting input

UP/DOWN

1-edge counting

4-edge counting

DOWN

Phase A

Phase B

Phase A

Phase B

+1 +1 +1

Up-counting

+1 +1 +1 +1 +1

+1 +1 +1 +1 Up-counting

-1 -1 -1

Phase A

Phase B

Phase A

Phase B

-1

Down-counting

-1 -1 -1 -1 -1

-1 -1 -1 -1

Down-counting

specifies down-counting or up-counting. ON: Down-counting OFF: Up-counting

A counter executes up-counting or downcounting as shown on the left. The counting direction can be checked in M8246 to M8250. ON: Down-counting OFF: Up-counting

A counter automatically executes upcounting or down-counting according to changes in the input status of the phase A or B as shown on the left. The counting direction can be checked in M8251 to M8255. ON: Down-counting OFF: Up-counting

Page 65

FXCPU Structured Programming Manual

[Device & Common]

4. Cautions on counterpart equipment connected to high speed counter inputs

General-purpose inputs X000 to X007 (X003) are used for high speed counter inputs. An encoder*1 adopting the output type shown in the table below can be connected depending on the connected terminal. Encoders adopting the voltage output type and absolute encoders cannot be connected to high speed counter inputs.

→ For the wiring, refer to the manual (Hardware Edition) of the PLC main unit.

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

Devices in

Detail

Output type which can be directly connected to input terminal of main unit

Output type which can be directly connected to input terminal of

FX3U-4HSX-ADP

*1. A rotary encoder adopting the output type shown above may not operate correctly depending on the

electrical compatibility. Check the specifications before connecting an encoder.

*2. This product is the adaptor for high speed input dedicated to FX

Open collector transistor output type compatible with 24 VDC

Differential line driver output type (Output voltage: 5 VDC or less)

3U PLCs.

Constant

Parameters

Specified the

Device &

Special Device

Errors

Types and

Setting of

Other Functions

Page 66

FXCPU Structured Programming Manual

[Device & Common]

5. High speed counter list

1) In FX3U/FX3UC PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Classification Counter No.

Hardware

counters

C244(OP)

C245(OP)

1-phase 1-counting input

Software

counters

Hardware

1-phase 2-counting input

2-phase 2-counting input

counters

Software

counters

Hardware

counters

Software

counters

C248(OP)

C253(OP)

C235

C236

C237

C238

C239

C240

C241 C242 C243

C244

C245

C246

C247

C248

C249 C250

C251

C253

C252

C254 C255

1-edge counting/ 4-edge counting

*2*3

1-edge counting

4-edge counting

1-edge counting

4-edge counting

1-edge counting

4-edge counting

1-edge counting

4-edge counting

1-edge counting

4-edge counting

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided Not provided

Provided

Not provided Not provided

Provided

Not provided

Provided

Not provided

Provided

External start input

Not provided

Provided

Not provided

Provided

Not provided

Provided

terminal

*1. They are handled as software counters depending on the operating condition. When they are handled

as software counters, they get restrictions of both the maximum response frequency and the total frequency.

→ For the condition handled as software counters, refer to Subsection 2.7.9.

→ For the total frequency, refer to Subsection 2.7.10.

*2. Cautions on wiring should be considered for these high speed counters.

→ For the wiring, refer to the manual (Hardware Edition) of the PLC main unit.

*3. C244, C245 and C248 are usually used as software counters, but can be used as hardware counters

C244 (OP), C245 (OP) and C248 (OP) by combining special auxiliary relays (M8388 and one among M8390 to M8392).

→ For the method to switch the counter function, refer to Subsection 2.7.7.

*4. 2-phase 2-input counters usually execute 1-edge counting, but can be used for 4-edge counting by

combining special auxiliary relays (M8388 and one between M8198 and M8199).

→ For the method to use a 2-phase 2-input counter for 4-edge counting, refer to Subsection 2.7.8.

*5. The external reset input usually causes reset at turning ON, but can cause reset at turning OFF by

combining special auxiliary relays (M8388 and M8389).

→ For the method to change the logic for external reset input, refer to Subsection 2.7.6.

*6. C253 is usually used as a hardware counter, but can be used as a counter C253 (OP) not having

reset input by combining special auxiliary relays (M8388 and M8392). In this case, C253 (OP) is handled as a software counter.

Page 67

FXCPU Structured Programming Manual

[Device & Common]

Notation of high speed counters

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

For some high speed counters in FX

3U/FX3UC PLCs, the assignment of input terminals switches when special

auxiliary relays are combined. (For input terminal numbers, refer to Subsection 2.7.2.) Such high speed counters are described as follows in this section. Note that "(OP)" is not available in programming.

Standard device number Switched device number Standard device number Switched device number

C244 C244(OP) C248 C248(OP)

C245 C245(OP) C253 C253(OP)

2) In FX

3G/FX3GC PLCs

Classification Counter No.

Software

counters

1-phase 1-counting input

C248(OP)

Software

counters

1-phase 2-counting input

C253(OP)

C254(OP)

Software

counters

2-phase 2-counting input

C235 C236 C237 C238 C239 C240

C241 C242 C243

C244 C245

C246

C247 C248

C249 C250

C251

C252 C253

C254 C255

1-edge counting/ 4-edge counting

- Provided Not provided

- Provided Provided

- Provided Not provided

- Provided Provided

1-edge counting

1-edge counting Provided Not provided

1-edge counting Provided Provided

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided Not provided

External start input

terminal

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

*1. C248 and C253 are usually used as counters having reset input, but can be used as counters C248

(OP) and C253 (OP) not having reset input when used together with special auxiliary relays M8388 and M8392.

*2. C254 is usually used as a counter having reset input and start input, but can be used as a counter

C254 (OP) not having reset input or start input when used together with special auxiliary relays M8388 and M8395.

Notation of high speed counters

For some high speed counters in FX

3G/FX3GC PLCs, the assignment of input terminals switches when

special auxiliary relays are combined. Such high speed counters are described as follows in this section. Note that "(OP)" is not available in programming.

Standard device number Switched device number

C248 C248(OP)

C253 C253(OP)

C254 C254(OP)

Page 68

FXCPU Structured Programming Manual

[Device & Common]

3) In FX3S PLC

Classification Counter No.

C235 C236 C237 C238

Software

counters

1-phase 1-counting input

Software

counters

1-phase 2-counting input

Software

counters

2-phase 2-counting input

C239 C240

C241 C242 C243

C244 C245

C246

C248(OP)

C247 C248

C249 C250

C251

C253(OP)

C252 C253

C254 C255

2 Devices in Detail

2.7 High Speed Counter [C]

1-edge counting/ 4-edge counting

- Provided Not provided

- Provided Provided

- Provided Not provided

- Provided Provided

1-edge counting

1-edge counting Provided Not provided

1-edge counting Provided Provided

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided Not provided

External start input

terminal

*1. C248 and C253 are usually used as counters having reset input, but can be used as counters C248

(OP) and C253 (OP) not having reset input when used together with special auxiliary relays M8388 and M8392.

Notation of high speed counters

For some high speed counters in FX

3S PLC, the assignment of input terminals switches when special

auxiliary relays are combined. Such high speed counters are described as follows in this section. Note that "(OP)" is not available in programming.

Standard device number Switched device number

C248 C248(OP)

C253 C253(OP)

Page 69

FXCPU Structured Programming Manual

[Device & Common]

4) In FX1S/FX1N/FX1NC PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

Classification Counter No.

Software

counters

1-phase 1-counting input

Software

counters

1-phase 2-counting input

Software

counters

2-phase 2-counting input

1-edge counting/ 4-edge counting

C235 C236

C237 C238 C239 C240

C242 C243

C244 C245

C246 -

C247 C248

C249 C250

C251

C252 C253

C254 C255

1-edge counting

Data length

32-bit

bidirectional

-C241

-Provided

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided

Provided

Not provided

Provided

External start input

terminal

Not provided

Provided

Not provided

Provided

Not provided

Provided

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

5) In FX

2N/FX2NC PLCs

Classification Counter No.

counters

1-phase 1-counting input

counters

1-phase 2-counting input

counters

2-phase 2-counting input

Hardware

Software

counters

Hardware

Software

counters

Hardware

Software

counters

1-edge counting/ 4-edge counting

C235 C236

C237 C238 C239 C240

C242 C243

C244 C245

C246 -

C247 C248

C249 C250

C251

C252 C253

C254 C255

-C241

-Provided

1-edge counting

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided

Provided

Not provided

Provided

External start input

terminal

Not provided

Provided

Not provided

Provided

Not provided

Provided

Types and

Setting of

Parameters

Other Functions

*1. They are handled as software counters depending on the operating condition. When they are handled

as software counters, they get restrictions of both the maximum response frequency and the total frequency.

Page 70

FXCPU Structured Programming Manual

[Device & Common]

6) In FX0S/FX0/FX0N PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Classification Counter No.

Software

counters

1-phase 1-counting input

Software

counters

1-phase 2-counting input

Software

counters

2-phase 2-counting input

1-edge counting/ 4-edge counting

C235 C236 C237 C238

C241 C242

C244 Provided

C246

C247

C249 Provided

C251

C252

C254 Provided

1-edge counting

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided

Provided

Not provided

Provided

Not provided

Provided

External start input

terminal

Not provided

7) In FX

1-phase 1-counting input

1-phase 2-counting input

2-phase 2-counting input

U/FX2C PLCs

Classification Counter No.

C235 C236 C237 C238

Software

counters

Software

counters

Software

counters

C239 C240

C241 C242 C243

C244 C245

C246

C247 C248

C249 C250

C251

C252 C253

C254 C255

1-edge counting/ 4-edge counting

1-edge counting

Data length

32-bit

bidirectional

counter

32-bit

bidirectional

counter

32-bit

bidirectional

counter

External reset input

terminal

Not provided

Provided

Not provided

Provided

Not provided

Provided

External start input

terminal

Not provided

Provided

Not provided

Provided

Not provided

Provided

Page 71

FXCPU Structured Programming Manual

[Device & Common]

2.7.2 Input assignment for high speed counters

Inputs X000 to X007 (X003) are assigned as shown in the tables below according to each high speed counter number. When a high speed counter is used, the filer constant of a corresponding input number in the PLC main unit automatically changes. Input terminals not used for high speed counters, however, can be used as general inputs.

→ For the input specifications of the PLC main unit, refer to the hardware manual of the PLC main

3U/FX3UC PLCs : (X000 to X005:5μS, X006, X007:50μS) 3G/FX3GC PLCs : (X000, X001, X003, X004:10μS, X002, X005 to X007:50μS)

3S PLC : (X000, X001:10μS, X002 to X007:50μS)

1S/FX1N/FX1NC/FX2N/FX2NC PLCs : (X000, X001:20μS, X002 to X005:50μS)

0S/FX0/FX0N/FXU/FX2C PLCs : (X000 to X003/X005:50μS)

• Prohibition on redundant use of input terminals

Inputs X000 to X007(X003) are used for high speed counters, input interrupt, pulse catch, SPD/DSZR/ DVIT/ZRN instructions and general-purpose inputs. Make sure to use each input terminal only once.

2 Devices in Detail

2.7 High Speed Counter [C]

unit.

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 72

FXCPU Structured Programming Manual

[Device & Common]

1. In FX3U/FX3UC PLCs

When FX3U-4HSX-ADP units are connected to an FX3U PLC, input terminals inside heavy-line frames in the table below are assigned to the first FX second FX Same input numbers are assigned to input terminals of the FX PLC main unit. Use only either input terminal. If both input terminals are used, intended operations are not achieved because inputs of the FX and inputs of the FX

1-phase

1-counting

1-phase

2-counting

2-phase

2-counting

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

*1. Cautions on wiring should be considered for these high speed counters.

*2. Hardware counters are switched to software counters when a comparison set/reset instruction for high

*3. When a special auxiliary relay is driven in a program, used input terminals and their functions are

*4. 2-phase 2-input counters usually execute 1-edge counting, but can be used for 4-edge counting by

3U-4HSX-ADP unit.

3U PLC operate under the "OR" relationship.

→ For the input specifications of the FX

Counter No. Classification

input

C235

C236

C237

C238

C239

C240

C241 S/W

C242 S/W

C243 S/W U/D R

C244 S/W U/D R S

C244(OP)

C245(OP)

C248(OP)

C253(OP)

C245 S/W U/D R S

C246

C247 S/W U D R

C248 S/W U D R

*1*3

C249 S/W U D R S

C250 S/W U D R S

C251

C252 S/W A B R

C253

C254 S/W A B R S

C255 S/W A B R S

H/W

S/W A B

→ For the wiring, refer to the hardware manual of the PLC main unit.

speed counter (DHSCS, DHSCR, DHSZ or DHSCT) is used. C253 is switched to a software counter when the logic for external reset input is reversed.

→ For the condition under which hardware counters are handled as software counters, refer to

switched.

→ For the method to use software counters as hardware counters, refer to Subsection 2.7.7.

combining special auxiliary relays.

→ For the method to use a 2-phase 2-input counter for 4-edge counting, refer to Subsection 2.7.8.

2 Devices in Detail

2.7 High Speed Counter [C]

3U-4HSX-ADP unit, and other input terminals are assigned to the

3U-4HSX-ADP and input terminals of the FX3U

3U-4HSXADP

3U-4HSX-ADP, refer to the FX3U hardware manual.

Input terminal assignment

X000 X001 X002 X003 X004 X005 X006 X007

U/D

U/D R

U/D

U D

A B

A B R

Subsection 2.7.9.

Page 73

FXCPU Structured Programming Manual

[Device & Common]

2. In FX3G/FX3GC PLCs

Counter No. Classification

C235 S/W U/D

C236 S/W U/D

C237 S/W U/D

C238 S/W U/D

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

C239 S/W U/D

C240 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C243 S/W U/D R

C244 S/W U/D R S

C245 S/W U/D R S

C246 S/W U D

C247 S/W U D R

C248 S/W U D R

C248(OP) S/W U D

C249 S/W U D R S

C250 S/W U D R S

C251 S/W A B

C252 S/W A B R

C253 S/W A B R

C253(OP) S/W A B

C254 S/W A B R S

C254(OP) S/W A B

C255 S/W A B R S

2 Devices in Detail

2.7 High Speed Counter [C]

Input terminal assignment

X000 X001 X002 X003 X004 X005 X006 X007

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

3. In FX3S PLC

Input terminal assignment

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Counter No. Classification

C235 S/W U/D

C236 S/W U/D

C237 S/W U/D

C238 S/W U/D

C239 S/W U/D

C240 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C243 S/W U/D R

C244 S/W U/D R S

C245 S/W U/D R S

C246 S/W U D

C247 S/W U D R

C248 S/W U D R

C248(OP) S/W U D

C249 S/W U D R S

C250 S/W U D R S

C251 S/W A B

C252 S/W A B R

C253 S/W A B R

C253(OP) S/W A B

C254 S/W A B R S

C255 S/W A B R S

X000 X001 X002 X003 X004 X005 X006 X007

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

Types and

Setting of

Parameters

Other Functions

Page 74

FXCPU Structured Programming Manual

[Device & Common]

4. In FX1S/FX1N/FX1NC PLCs

Counter No. Classification

C235 S/W U/D

C236 S/W U/D

C237 S/W U/D

C238 S/W U/D

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

C239 S/W U/D

C240 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C243 S/W U/D R

C244 S/W U/D R S

C245 S/W U/D R S

C246 S/W U D

C247 S/W U D R

C248 S/W U D R

C249 S/W U D R S

C250 S/W U D R S

C251 S/W A B

C252 S/W A B R

C253 S/W A B R

C254 S/W A B R S

C255 S/W A B R S

2 Devices in Detail

2.7 High Speed Counter [C]

Input terminal assignment

X000 X001 X002 X003 X004 X005 X006 X007

5. In FX2N/FX2NC PLCs

Input terminal assignment

Subsection 2.7.9.

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Counter No. Classification

C235

C236

C237 S/W U/D

C238 S/W U/D

C239 S/W U/D

C240 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C243 S/W U/D R

C244 S/W U/D R S

C245 S/W U/D R S

C246

C247 S/W U D R

C248 S/W U D R

C249 S/W U D R S

C250 S/W U D R S

C251

C252 S/W A B R

C253 S/W A B R

C254 S/W A B R S

C255 S/W A B R S

H/W

X000 X001 X002 X003 X004 X005 X006 X007

U/D

U D

A B

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

*1. Hardware counters are switched to software counters when a comparison set/reset instruction for high

speed counter (DHSCS, DHSCR or DHSZ) is used.

→ For the condition under which hardware counters are handled as software counters, refer to

Page 75

FXCPU Structured Programming Manual

[Device & Common]

6. In FXU/FX2C PLCs

Counter No. Classification

C235 S/W U/D

C236 S/W U/D

C237 S/W U/D

C238 S/W U/D

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

C239 S/W U/D

C240 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C243 S/W U/D R

C244 S/W U/D R S

C245 S/W U/D R S

C246 S/W U D

C247 S/W U D R

C248 S/W U D R

C249 S/W U D R S

C250 S/W U D R S

C251 S/W A B

C252 S/W A B R

C253 S/W A B R

C254 S/W A B R S

C255 S/W A B R S

2 Devices in Detail

2.7 High Speed Counter [C]

Input terminal assignment

X000 X001 X002 X003 X004 X005 X006 X007

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

7. In FX0S/FX0/FX0N PLCs

Counter No. Classification

C235 S/W U/D

C236 S/W U/D

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

C237 S/W U/D

C238 S/W U/D

C241 S/W U/D R

C242 S/W U/D R

C244 S/W U/D R S

C246 S/W U D

C247 S/W U D R

C249 S/W U D R S

C251 S/W A B

C252 S/W A B R

C254 S/W A B R S

H/W : Hardware counters S/W : Software counters U : Up-counting input D : Down-counting input A : Phase A input B : Phase B input R : External reset input S : External start input

Input terminal assignment

X000 X001 X002 X003

Types and

Setting of

Parameters

Other Functions

Page 76

FXCPU Structured Programming Manual

[Device & Common]

2.7.3 Handling of high speed counters

1. 1-phase 1-counting input

X010

M8235

X011

Down-counting or up-counting

RST

EN ENO

CC235

2 Devices in Detail

2.7 High Speed Counter [C]

While X012 is ON, C235 counts "OFF ON" of the input X000.

When X011 turns ON and then the RST instruction is executed, C235 is reset.

X012

CC235

K-5

X010

X011

X012

CC244

OUT_C_32

EN ENO CCoil CValue

M8244

OUT_C_32

EN ENO CCoil CValue

Down-counting or up-counting

RST

EN ENO

CC244

Operation example The counter C235 shown above operates as follows:

X010

X011

X012

X000

Counting input

C235 Current

value

Up-counting

Reset input

Start input

454

Down-counting

Up-counting

The counting direction of counters C235 to C245

· is switched to down-counting or up-counting when M8235 to M8245 turns ON or OFF.

While X012 is ON, C244 immediately starts counting when the input X006 turns ON. The counting input is X000. In this example, the set value is indirectly specified as the contents of data registers (D1, D0).

The high speed counter C244 can be reset using X011

· in a sequence as shown in the figure, but it is immediately reset without any program when X001 is closed.In this case, any program including X011 is not necessary.

The counting direction of counters C235 to C245

· is switched to down-counting or up-counting when M8235 to M8245 turns ON or OFF.

-1

-2

When output has been already turned ON

C235 output contact

-3

-4

-5

-6

-7

-8

-3

-4

-5

-6

When the counting input X000 is given, C235 executes up-counting or down-counting as interrupt processing.

• When the current value of the counter increases from "-6" to "-5", the output contact is set (turned ON). When the current value decreases from "-5" to "-6", the output contact is reset (turned OFF).

• The current value increases or decreases without regard to the operation of the output contact. When the counter executes up-counting from "+2,147,483,647", the count value becomes "2,147,483,648". In the same way, when the counter executes down-counting from "-2,147,483,648", the count value becomes "+2,147,483,647". (This type of operation is called ring counter.)

• When the reset input X011 turns ON and then the RST instruction is executed, the current value of the counter is reset to "0" and the output contact is turned OFF.

• In a latched type high speed counter, the current value, output contact operation status and reset status of the counter are latched (backed up) even if the power is interrupted.

Page 77

FXCPU Structured Programming Manual

[Device & Common]

2. 1-phase 2-counting input

These counters are 32-bit bidirectional counters. The operation of the output contact caused by the current value is equivalent to that in 1-phase 1-counting input type high speed counters described above.

X011

RST

EN ENO

CC246

2 Devices in Detail

2.7 High Speed Counter [C]

While X012 is ON, C246 executes up-counting when the input X000 turns ON from OFF, and executes down-counting when the input X001 turns ON from OFF.

Device Outline

Devices in

Detail

X012

X011

X012

CC246

CC249 K1234

OUT_C_32

EN ENO CCoil CValue

RST

EN ENO

OUT_C_32

EN ENO CCoil CValue

CC249

The up/down-counting operation of C246 to C250 is indicated by the ON/OFF status of M8246 to M8250. ON: Down-counting OFF: Up-counting

While X012 is ON, C249 immediately starts counting when the input X006 (X003) turns ON. The up-counting input is X000, and the down-counting input is X001.

The high speed counter C244 can be reset using X011 in a sequence as shown in the figure, but it is immediately reset without any program when X002 is closed. In this case, any program including X011 is not necessary.

The up/down-counting operation of C246 to C250 is indicated by the ON/OFF status of M8246 to M8250. ON: Down-counting OFF: Up-counting

These counters are 32-bit bidirectional counters. The operation of the output contact caused by the current value is equivalent to that in 1-phase type high speed counters described above.

→ Refer to "2.7.2 Input assignment for high speed counters".

X011

X012

CS251

M8251

CC251 K1234

RST

EN ENO

OUT_C_32

EN ENO CCoil CValue

Y002

Y003

CC251

While X012 is ON, C251 counts operations of inputs X000 (phase A) and X001 (phase B) as interrupt processing. When X011 turns ON and then the RST instruction is execute, C251 is reset.

When the current value becomes equivalent to or larger than the set value, Y002 turns ON. When the current value becomes equivalent to or smaller than the set value, Y002 turns OFF.

Y003 turns ON (for down-counting) or OFF (for up-counting) according to the counting direction.

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

X011

X012

CS254

M8254

CC254

RST

EN ENO

OUT_C_32

EN ENO CCoil CValue

Y004

Y005

While X012 is ON, C254 immediately starts counting

CC254

when the input X006 turns ON. Its counting inputs are X000 (phase A) and X001 (phase B).

In addition to reset by X011 in a sequence, C254 is immediately reset when X002 turns ON.

When the current value becomes equivalent to or larger than the set value (D1, D0), Y004 turns ON. When the current value becomes equivalent to or smaller than the set value, Y004 turns OFF.

Y005 turns ON (for down-counting) or OFF (for up-counting) according to the counting direction.

Page 78

FXCPU Structured Programming Manual

[Device & Common]

• 2-phase encoder generates outputs for the phase A and phase B with a phase difference of 90°. With these outputs, a high speed counter automatically executes up-counting and down-counting as shown in the figure below.

- When a counter is executing 1-edge counting

2 Devices in Detail

2.7 High Speed Counter [C]

Phase A

Phase B

Up-counting

Phase A

Phase B

-1

Down-counting

- When a counter is executing 4-edge counting

Phase A

Phase B

+1 +1 +1 +1 +1

Phase A

Phase B

+1 +1 +1 +1

Up-counting

-1 -1 -1 -1 -1

-1 -1 -1 -1

Down-counting

• The up/down-counting operation of C251 to C255 is indicated by the ON/OFF status of M8251 to M8255. ON: Down-counting OFF: Up-counting

Page 79

FXCPU Structured Programming Manual

[Device & Common]

2.7.4 Current value update timing and comparison of current value

1. Current value update timing

A high speed counter executes up-counting or down-counting when a pulse is input to its input terminal, but the current value of the high speed counter is updated at the timing shown in the table below. When the current value of a high speed counter is used as it is in the MOV instruction, CMP instruction or applied instruction for data comparison, etc., the current value update timing is affected by scans as shown in the table.

Current value update timing

Hardware counter When OUT or HCMOV instruction is executed for counter

Software counter When counting input is given

2. Comparison of the current value

The following two methods are available to compare and output the current value of a high speed counter. Some instructions are not supported in some PLCs.

→ Refer to the FX Structured Programming Manual [Basic & Applied Instruction].

1) Using the comparison instruction (CMP), zone comparison instruction (ZCP) or data comparison

instruction When the comparison result is not necessary during counting operation, comparison may be smoothly

executed in the main program (CMP or ZCP) or data comparison instruction.

*1. If it is necessary to execute comparison and update an output contact (Y) at the timing at which the

current value of a high speed counter changes, use a comparison instruction for high speed counter (DHSCS, DHSCR, DHSZ or DHSCT).

2) Using a comparison instruction for high speed counter (DHSCS, DHSCR, DHSZ or DHSCT)

A comparison instruction for high speed counter (DHSCS, DHSCR, DHSZ or DHSCT) executes comparison and outputs the comparison result while the target high speed counter is counting. The number of times of using these instructions is restricted as shown in the table below. When an output relay (Y) is specified for the comparison result, the comparison result is directly reflected on the ON/OFF status of the output without regard to output refresh executed by the END instruction. Mechanical operation delay (about 10 ms) cannot be avoided in a relay output type PLC. Use a transistor output type PLC.

Instruction Restriction of number of times of using instruction

DHSCS

DHSCR

DHSZ

DHSCT

FX3U/FX3UC PLCs: These instructions can be used up to 32 times including the DHSCT instruction. FX

0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC/FX3S/FX3G/FX3GC PLCs: These instructions can be

used up to 6 times.

0S/FX0/FX0N/FX1S/FX1N/FX1NC PLCs do not support the DHSZ instruction.)

(FX

This instruction can be used only once. (FX

0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC/FX3S/FX3G/FX3GC PLCs do not support the DHSCT

instruction.)

if the DHCMOV instruction is used just before the comparison instruction

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

*1. When a comparison instruction for high speed counter is used, the maximum response frequency and

total frequency of software counters may be restricted.

→ For the maximum response frequency and total frequency of software counters, refer to

Subsection 2.7.10.

Page 80

FXCPU Structured Programming Manual

[Device & Common]

2 Devices in Detail

2.7 High Speed Counter [C]

2.7.5 Related devices

1. Devices used to switch the counting direction of 1-phase 1-counting input counters

Type Counter No. Specifying device Up-counting Down-counting

C235 M8235

C236 M8236

C237 M8237

C238 M8238

C239 M8239

1-phase 1-counting input

C240 M8240

C241 M8241

C242 M8242

C243 M8243

C244 M8244

C245 M8245

2. Devices used to monitor the counting direction of 1-phase 1-counting input counters and 2phase 2-counting input counters

Type Counter No. Monitoring device OFF ON

C246 M8246

C247 M8247

1-phase 1-counting input

2-phase 2-counting input

C248 M8248

C249 M8249

C250 M8250

C251 M8251

C252 M8252

C253 M8253

C254 M8254

C255 M8255

OFF ON

Up-counting Down-counting

3. Devices used to switch the high speed counter function

FX0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC PLCs do not support this function.

Device number Name Description

M8388

M8389

M8390

M8391

M8392 Switches the function of C248 and C253. (For details, refer to Subsection 2.7.7.)

M8395

M8198

M8199

Contact for switching function of high speed counter

Function switching device

Switches the function of high speed counter.

Switches the logic of the external reset input. (For details, refer to Subsection 2.7.6.) (FX3S/FX3G/FX3GC PLCs do not support this device.)

Switches the function of C244. (For details, refer to Subsection 2.7.7.)

3S/FX3G/FX3GC PLCs do not support this device.)

(FX

Switches the function of C245. (For details, refer to Subsection 2.7.7.) (FX

3S/FX3G/FX3GC PLCs do not support this device.)

Switches the function of C254. (For details, refer to Subsection 2.7.7.) (FX3S/FX3U/FX3UC PLCs do not support this device.)

Switches the edge counting type (between 1 and 4) of C251, C252 and C254. (For details, refer to Subsection 2.7.8.) (FX3S/FX3G/FX3GC PLCs do not support this device.)

Switches the edge counting type (between 1 and 4) of C253, C255 and C253 (OP). (For details, refer to Subsection 2.7.8.) (FX3S/FX3G/FX3GC PLCs do not support this device.)

Page 81

FXCPU Structured Programming Manual

[Device & Common]

4. Operation status of hardware counters and software counters

FX0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC/FX3S/FX3G/FX3GC PLCs do not support this function.

Device number Name Description ON OFF

M8380

M8381

M8382

M8383

M8384

M8385

M8386

M8387

Operation status

*1. Cleared when the PLC mode switches from STOP to RUN.

Indicates the operation status of C235, C241, C244, C246, C247, C249, C251, C252 and C254.

Indicates the operation status of C236.

Indicates the operation status of C237, C242 and C245.

Indicates the operation status of C238, C248, C248 (OP), C250, C253 and C255.

Indicates the operation status of C239 and C243.

Indicates the operation status of C240.

Indicates the operation status of C244 (OP).

Indicates the operation status of C245 (OP).

2 Devices in Detail

2.7 High Speed Counter [C]

Software counter Hardware counter

Constant

Device Outline

Devices in

Detail

Specified the

Device &

2.7.6 Change of logic of external reset input signal

Counters C241 to C245, C247 to C250 and C252 to C255 are usually reset when the external reset input signal turns ON. By using the program shown below, the logic can be reversed so that these counters are reset when the external reset input signal turns OFF. FX

0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC/FX3S/FX3G/FX3GC PLCs do not support this

function.

Counter No. Program to reverse logic of external reset input signal Description

M8388

M8389

C241 to C245 C247 to C250 C252 to C255

CC2

Caution

When the logic of the external reset input signal is reversed, C253 switches to a software counter.

OUT_C_32

EN ENO CCoil CValue

The logic of the external reset input signal is reversed so that the counters are reset when the external reset input signal turns OFF. (The logic is reversed for all target counters.)

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

Page 82

FXCPU Structured Programming Manual

[Device & Common]

2.7.7 Assignment of counter input terminal and switching of function

The assignment of input terminal and the function of software counters change as shown below when the following special auxiliary relays are combined. In a program, put a special auxiliary relay just before a target counter. FX

0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC PLCs do not support this function.

1. In FX3U/FX3UC PLCs

Counter No. When using software counter as hardware counter Description

M8388

M8390

• The counting input changes from X000 to X006.

C244(OP)

C245(OP)

M8388

CC244

CC245

OUT_C_32

EN ENO CCoil CValue

M8391

OUT_C_32

EN ENO CCoil CValue

• The reset input is not provided.

• The start input is not provided.

• It operates as a hardware counter.

• The counting input changes from X002 to X007.

• The reset input is not provided.

• The start input is not provided.

• It operates as a hardware counter.

2 Devices in Detail

2.7 High Speed Counter [C]

C248(OP)

C253(OP)

M8388

CC248

CC253

M8392

OUT_C_32

EN ENO CCoil CValue

M8392

OUT_C_32

EN ENO CCoil CValue

• The reset input is not provided.

• It operates as a hardware counter.

• The reset input is not provided.

• It operates as a software counter.

Page 83

FXCPU Structured Programming Manual

[Device & Common]

2. In FX3G/FX3GC PLCs

Counter No.

C248(OP) • The reset input is not provided.

When using assignment of counter input terminal and

switching of function

M8388

CC248

M8392

OUT_C_32

EN ENO CCoil CValue

2 Devices in Detail

2.7 High Speed Counter [C]

Description

Device Outline

Devices in

Detail

C253(OP) • The reset input is not provided.

C254(OP)

3. In FX

Counter No.

C248(OP) • The reset input is not provided.

3S PLCs

M8388

M8392

OUT_C_32

EN ENO

CC253

M8388

CC254

When using assignment of counter input terminal and

switching of function

M8388

CC248

CCoil CValue

M8395

OUT_C_32

EN ENO CCoil CValue

M8392

OUT_C_32

EN ENO CCoil CValue

• The input counting (2-phase 2-counting) changes as follows: Phase A: Changes from X000 to X006. Phase B: Changes from X001 to X007.

• The reset input is not provided.

• The start input is not provided.

Description

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

M8388

M8392

C253(OP) • The reset input is not provided.

CC253

OUT_C_32

EN ENO CCoil CValue

Page 84

FXCPU Structured Programming Manual

[Device & Common]

2 Devices in Detail

2.7 High Speed Counter [C]

2.7.8 How to use 2-phase 2-counting input counters C251 to C255 for 4-edge counting

2-phase 2-counting input counters C251 to C255 usually executes 1-edge counting, but can be used for 4edge counting by the programs shown in the table below. FX

0S/FX0/FX0N/FX1S/FX1N/FX1NC/FXU/FX2C/FX2N/FX2NC/FX3S/FX3G/FX3GC PLCs do not support this

function.

Counter No. When using 2-phase 2-counting input counter for 4-edge counting Description

M8000

M8198

C251

C252

C253

C253(OP)

C254

M8000

M8388

M8000

CC251

CC252

CC253

CC254

OUT_C_32

EN ENO CCoil CValue

M8198

OUT_C_32

EN ENO CCoil CValue

M8199

OUT_C_32

EN ENO CCoil CValue

M8199

M8392

OUT_C_32

EN ENO CCoil CValue

M8198

OUT_C_32

EN ENO CCoil CValue

1-edge counting (before change)

Phase A

Phase B

Up-counting

Phase A

-1

Phase B

Down-counting

4-edge counting (after change)

+1 +1 +1 +1 +1

Phase A

Phase B

+1 +1 +1 +1 Up-counting

-1 -1 -1 -1 -1

Phase A

Phase B

-1 -1 -1 -1

Down-counting

C255

M8000

CC255

M8199

OUT_C_32

EN ENO CCoil CValue

Page 85

FXCPU Structured Programming Manual

[Device & Common]

2 Devices in Detail

2.7 High Speed Counter [C]

2.7.9 Condition under which hardware counters are handled as software counters

High speed counters are classified into hardware counters and software counters. Under some conditions, however, hardware counters are handled as software counters. In this case, use such counters within the range of maximum response frequency and total frequency determined for software counters.

Conditions under which hardware counters are handled as software counters

Counter No. Conditions under which hardware counters are handled as software counters

Because hardware counters execute counting at the hardware level of the PLC, they can execute counting without regard to the total frequency. However, they are handled as software counters in the following conditions.In this case, the maximum response frequency and total frequency are restricted in the same way as other software counters.

Use M8380 to M8387 to know whether high speed counters are handled as hardware counters or software counters (only in FX3U/FX3UC PLCs).

• When the DHSCS, DHSCR, DHSZ or DHSCT instruction is used for a hardware counter number, the corresponding hardware counter is handled as a software counter. (FX2N/FX2NC PLCs do not support the DHSCT instruction.) Example: C235

OUT_C_32

EN ENO

K100

CCoil CValue

EN s1 s2

DHSCS

ENO

Y000

3U/FX3UC PLCs).

FX3U/FX3UC PLCs C235 C236 C237 C238 C239 C240 C244(OP) C245(OP) C246 C248(OP) C251 C253

FX2N/FX2NC PLCs C235 C236 C246 C251

CC235

CN235

In this case, C235 is handled as a software counter.

• When an index register is used for a counter number specified in the DHSCS, DHSCR, DHSZ or DHSCT instruction, all hardware counters are handled as software counters (only in FX3U/FX3UC PLCs). Example: C235Z0

CN235Z0

• C253 (hardware counter) is handled as a software counter when the logic is reversed using the external reset input signal logic change function (only in FX Example: When the logic of the external reset input signal is reversed for C253

→ For reverse of the logic of the external reset input signal, refer to Subsection 2.7.6.

Device Outline

Devices in

Detail

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

M8388

CC253

M8389

OUT_C_32

EN ENO CCoil CValue

Page 86

FXCPU Structured Programming Manual

[Device & Common]

2.7.10 Response frequency of high speed counters

1. Response frequency of hardware counters

The tables below show the maximum response frequency of hardware counters. When hardware counters are handled as software counters in some operating conditions, their maximum response frequency becomes equivalent to that of software counters, and they are subject to restriction of the total frequency.

→ For conditions under which hardware counters are handled as software counters, refer to the

1) In FX

2-phase 2-counting input

3U/FX3UC PLCs

Counter No.

1-phase 1-counting input

1-phase 2-counting input C246, C248(OP) 100kHz

1-edge counting

4-edge counting 50kHz 100kHz

C235, C236, C237, C238, C239, C240 100kHz

C251, C253

2 Devices in Detail

2.7 High Speed Counter [C]

previous page.

Maximum response frequency

Main unit FX3U-4HSX-ADP

200kHzC244(OP), C245(OP) 10kHz

50kHz 100kHz

2) In FX

2N/FX2NC PLCs

Counter No.

1-phase 1-counting input C235, C236 60kHz

1-phase 2-counting input C246 60kHz

2-phase 2-counting input C251 30kHz

2. Response frequency and total frequency of software counters

The tables below show the maximum response frequency and total frequency of software counters. When the DHSZ or DHSCT instruction is used in a program, both the maximum response frequency and the total frequency are restricted for all software counters without regard to operands of the instruction. While examining a system or creating a program, consider the restrictions, and use software counters within the allowable range of maximum response frequency and total frequency.

→ For conditions under which hardware counters are handled as software counters, refer to the

3U/FX3UC PLCs

3U/3UC Series special function blocks/units are not connected

Counter type

Software

counter

Following

software

counter

combined with

DHSCS, DHSCR,

DHSZ or DHSCT

instruction

C235, C236 C237, C238 C239, C240

C244(OP) C245(OP)

C246, C248(OP) ×140 30

C251

C253

, ,

Maximum

frequency

Magnification for

calculating total frequency

×140

×110 10

×140 30

×410 7.5

Response frequency and total frequency according to instructions used

When DHSZ and

DHSCT instructions

are not used

response

(kHz)

Total

frequency

(kHz)

When only DHSCT

instruction is used

Maximum

response

frequency

(kHz)

DHSCT instruction, all hardware counters switch to software counters.

1-phase

1-counting

input

1-phase

2-counting

input

count-

phase

count-

ing

input

count-

1) In FX

• When special analog adapters and FX

C241, C242, C243, C244, C245

C247, C248, C249, C250

edge

C252

ing

C253(OP) C254

C255

edge

ing

*1. When index registers are added to a counter number specified by the DHSCS, DHSCR, DHSZ or

*2. High speed counters C244 (OP) and C245 (OP) can count at up to 10 kHz.

Total

frequency

(kHz)

Maximum response frequency

When only DHSZ

instruction is used

Maximum

response

frequency

(kHz)

40 - (Num-

ber of times

of using

instruc-

tions)

(40 - Num-

ber of times

of using

instruc-

tions) / 4

frequency

(kHz)

80 - 1.5 ×

(Number of

times of

instruc-

tions)

Total

using

Main unit

previous page.

When both DHSZ and

DHSCT instructions

are used

Maximum response

frequency

(kHz)

30 - (Num-

ber of times

of using

instruc-

tions)

(30 - Num-

ber of times

of using

instruc-

tions) / 4

Total

frequency

(kHz)

60 - 1.5 ×

(Number

of times of

using

instruc-

tions)

Page 87

FXCPU Structured Programming Manual

[Device & Common]

• When special analog adapters and FX3U/3UC Series special function blocks/units are connected

Counter type

When DHSZ and

DHSCT instructions

are not used

Maximum

response

frequency

Magnification for

(kHz)

calculating total frequency

×130

×110 10

×130 25

×47.5 6.2

1-phase

1-counting

input

1-phase

2-counting

input

count-

phase

count-

ing

input

count-

Following

software

counter

combined with

DHSCS, DHSCR,

DHSZ or DHSCT

instruction

C235, C236 C237, C238 C239, C240

C244(OP) C245(OP)

C246, C248(OP) ×130 25

C251, C253

, ,

edge

ing

edge

ing

Software

counter

C241, C242, C243, C244, C245

C247, C248, C249, C250

C252

, C253(OP) C254

, C255

*1. When index registers are added to a counter number specified by the DHSCS, DHSCR, DHSZ or

DHSCT instruction, all hardware counters switch to software counters.

*2. High speed counters C244 (OP) and C245 (OP) can count at up to 10 kHz.

2 Devices in Detail

2.7 High Speed Counter [C]

Response frequency and total frequency according to instructions used

When both DHSZ and

DHSCT instructions

are used

Maximum response

frequency

(kHz)

25 - (Num-

ber of times

of using

instruc-

tions)

(25 - Num-

ber of times

of using

instruc-

tions) / 4

Total

frequency

(kHz)

When only DHSCT

instruction is used

Maximum

response

frequency

(kHz)

Total

frequency

(kHz)

When only DHSZ

instruction is used

Maximum

response

frequency

(kHz)

30 - (Num-

ber of times

of using

instruc-

tions)

(30 - Num-

ber of times

of using

instruc-

tions) / 4

frequency

(kHz)

50 - 1.5 ×

(Number of

times of

instruc-

tions)

Total

using

Total

frequency

(kHz)

50 - 1.5 ×

(Number

of times of

using

instruc-

tions)

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Errors

• Calculation of the total frequency

Total frequency ≥ Sum of "Response frequency of high speed counter × Magnification for calculating total frequency"

• Calculation example When only the DHSZ instruction is used 6 times in a program, the total frequency is calculated as follows in accordance with the columns for "When only DHSZ instruction is used" shown in the table above. This calculation example is provided for a system configuration not including special analog adapters and FX

3U/FX3UC Series special function blocks/units.

Used high speed counter No.

C237

C241

C253(OP) [4-edge counting]

Operates as software counter.

Software counter

Input

frequency

30kHz 40 - 6 (times) = 34 kHz ×1

20kHz 40 - 6 (times) = 34 kHz ×1

4kHz {40 - 6 (times)} / 4 = 8.5 kHz ×4

Maximum response

frequency calculation

Magnification for

calculating total

frequency

Used

instruction

DHSZ instruc-

tion × 6 times

1) The total frequency is calculated as follows because the DHSZ instruction is used 6 times:

Total frequency = 80 - 1.5 × 6 = 71 kHz

2) The sum of the response frequency of used high speed counters is calculated as follows:

{30kHz×1[C237]} + {20kHz×1[C241]} + {4kHz×4[C253(OP)]} =66kHz ≤ 71kHz

Types and

Setting of

Parameters

Other Functions

Page 88

FXCPU Structured Programming Manual

[Device & Common]

2) In FX3G/FX3GC PLCs

Counter type

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Software counter

C235, C236, C238 C239, C241

C237, C240, C242 C243, C244, C245

C246, C248(OP) 60kHz

C247, C248, C249 C250

C251, C253(OP) 30kHz

C252, C253, C254 C254(OP), C255

*1. Number of axes used in the following positioning instructions:

PLSY, PLSR , DSZR , DTBL , ZRN , PLSV , DRVI , DRVA

• Calculation of the total frequency The total frequency is calculated using the following expression:

Response frequency

60kHz

10kHz

5kHz

When DHSCS, DHSCR or DHSZ

200 kHz - (Number of positioned axes*1 + Number of

pulse width/period measurement inputs) × 40 kHz

2.7 High Speed Counter [C]

Overall frequency determined by condition of instructions used

instruction is not used

When DHSCS, DHSCR or DHSZ

instruction is used

60 kHz - (Number of positioned axes*1 × 5 kHz)

(Number of pulse width/period measurement

inputs × 20 kHz)

2 Devices in Detail

Total frequency ≥ (Sum of frequency used by 1-phase counters) + (Sum of frequency used by 2-phase counters)

• Calculation example Example1: When DHSCS, DHSCR or DHSZ instruction is not used, and instructions related to positioning

(DRVI instruction [Y000] and DRVA instruction [Y001]) are used

Overall frequency: 200 kHz - (2 axes × 40 kHz) = 120 kHz

<Counter No.> <Contents of use> C235 (1-phase 1-counting) : 50 kHz is input. C236 (1-phase 1-counting) : 50 kHz is input. C237 (1-phase 1-counting) : 10 kHz is input. C253 (2-phase 2-counting) : 5 kHz is input.

Total115 kHz 120 kHz (Overall frequency)

Example2: When DHSCS, DHSCR or DHSZ instruction is not used, and instructions related to positioning

(DRVI instruction [Y000] are used, Number of pulse width/pulse period measurement inputs(X003)

Overall frequency: 200 kHz - (1 axes + 1 input) × 40 kHz = 120 kHz

<Counter No.> <Contents of use> C235 (1-phase 1-counting) : 50 kHz is input. C236 (1-phase 1-counting) : 50 kHz is input.

Total100 kHz 120 kHz (Overall frequency)

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FXCPU Structured Programming Manual

[Device & Common]

3) In FX3S PLC

Counter type

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Software counter

C235, C236, C241

C237, C238, C239, C240, C242, C243, C244, C245

C246

C247, C248, C248(OP), C249, C250

C251

C252, C253, C253(OP), C254, C255

*1. Number of axes used in the following positioning instructions:

PLSY, PLSR, DSZR, ZRN, PLSV, DRVI, DRVA

• Calculation of the total frequency The total frequency is calculated using the following expression:

Response frequency

60kHz

10kHz

60kHz

10kHz

30kHz

5kHz

When DHSCS, DHSCR or DHSZ

instruction is not used

200 kHz - (Number of positioned axes*1 × 40 kHz) 60 kHz - (Number of positioned axes*1 × 5 kHz)

2 Devices in Detail

2.7 High Speed Counter [C]

Overall frequency determined by condition of instructions used

When DHSCS, DHSCR or DHSZ

instruction is used

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Special Device

Total frequency ≥ (Sum of frequency used by 1-phase counters) + (Sum of frequency used by 2-phase counters)

• Calculation example Example: When DHSCS, DHSCR or DHSZ instruction is not used, and instructions related to positioning

(DRVI instruction [Y000] and DRVA instruction [Y001]) are used

Overall frequency: 200 kHz - (2 axes × 40 kHz) = 120 kHz

Total 115 kHz 120 kHz (Overall frequency)

Errors

Types and

Setting of

Parameters

Other Functions

Page 90

FXCPU Structured Programming Manual

[Device & Common]

4) In FX1S/FX1N/FX1NC PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Counter type

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Response frequency and total frequency according to instructions used

When DHSCS and DHSCR instructions are not used When DHSCS and DHSCR instructions are used

Software

counter

C235 to C245 ×1

C246 to C250 ×1

C251 to C255 ×2

Maximum response frequency (kHz)

Magnification for

calculating total frequency

C235, C236, C246(1-phase) C251(2-phase) :30 C237 to C245, C247 to C250(1-phase) :10 C252 to 255(2-phase) :5

Total

frequency

(kHz)

Maximum response frequency (kHz)

C235, C236, C246(1-phase) C251(2-phase) :30 C237 to C245, C247 to C250(1-phase) :10 C252 to 255(2-phase) :5

*1. The maximum response frequency is 60 kHz.

When using two or more high speed counters or when combining a high speed counter and the SPD, PLSY or PLSR instruction, make sure that the sum of the processing frequency does not exceed the total frequency shown above.

Calculation example (When the DHSCS and DHSCR instructions are not used)

Total

frequency

(kHz)

Used high speed counter No.

C235(1-phase) Software counter 30kHz ×130kHz C237(1-phase) Software counter 10kHz ×110kHz C253(2-phase) Software counter 5kHz ×210kHz

Input/output

frequency

Magnification for calculating

total frequency

Calculated value

Total frequency = 60 kHz Sum of processing frequency = 30 kHz + 10 kHz + 10 kHz = 50 kHz Sum of processing frequency (50 kHz) ≤ Total frequency (60 kHz)

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[Device & Common]

5) In FX2N/FX2NC PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Counter type

Following

Software

counter

C237 to C245 C235, C236 ×110

C247 to C250 C246 ×110 10 5.5

C252 to C255 C251 ×25

software counter

combined with

DHSCS, DHSCR

or DHSCZ

instruction

Magnification

for calculating

total frequency

Response frequency and total frequency according to instructions used

When DHSCS, DHSCR

and DHSCZ

instructions are not

used

Maximum

response

frequency

(kHz)

Total

frequency

(kHz)

When only DHSCS and

DHSCR instructions are

frequency (kHz)

C252 to C255:4

Maximum response

C251:5

used

Total

frequency

(kHz)

When only DHSCZ instruction is used

Maximum

response

frequency

(kHz)

5.5

frequency

Total

(kHz)

5.5

Calculation example (When the DHSCS, DHSCR and DHSZ instructions are not used)

Used high speed counter No.

C235(1-phase)

C237(1-phase) Software counter 3kHz ×13kHz C253(2-phase) Software counter 2kHz ×24kHz

PLSY(Y0)

PLSY(Y1) 4kHz - 4kHz

Handled as hardware counter

Pulse output instruction

Input/output

frequency

60kHz

7kHz - 7kHz

Magnification for calculating

total frequency

(Not required to be added because C235 is handled as hardware counter)

Calculated value

(Not required to be added because C235 is handled as hardware counter)

Constant

Parameters

Devices in

Detail

Specified the

Device &

Special Device

Errors

Types and

Setting of

Total frequency = 20 kHz Sum of processing frequency = 3 kHz + 4 kHz + 7 kHz + 4 kHz = 18 kHz Sum of processing frequency (18 kHz) ≤ Total frequency (20 kHz)

Other Functions

Page 92

FXCPU Structured Programming Manual

[Device & Common]

6) In FXU/FX2C PLCs

The maximum response frequency of high speed counters C235 to C255 is generally as follows (when the DHSCS and DHSCR instructions are not used or not driven):

Sum of frequency of 1-phase counters + (Sum of frequency of 2-phase counters) × 4 ≤ 20 kHz

maximum However, the actual maximum response frequency varies depending on used counters and DHSCS, DHSCR and DHSZ instructions. The table below shows the maximum response frequency of each counter. Do not exceed the values shown below. (Each value indicates the maximum response frequency of one high speed counter.)

2 Devices in Detail

2.7 High Speed Counter [C]

Combination of

high speed

counters

Counter No. when up to three 1-phase counters are

When only 1phase counters are used

When one 2phase counter (1 kHz or less) and one to four 1phase counters are used

When only 2phase counters are used

Number of 1-

phase counters

driven

simultaneously

1 - 10 7.0 7.0 5.0 5.0 4.0

2 - 10[A] 3.5 4.0[B] 2.5 2.5 1.5

3 - 6.62.52.52.02.51.5

4- 2.5 1.5 1.5

5- 2.5 1.5 1.5

6- 2.5 1.5 1.0

11 5.0 4.0 3.0

21 4.0 2.0 1.0

31 3.0 2.0 1.0

41 2.0 1.0 1.0

-1 2.0 2.0 2.0

-2 2.0 1.5 1.3

Number of 2-

phase counters

simultaneously

driven simultaneously→

driven

When DHSCS, DHSCR and

DHSZ instructions are not

used or not driven

Maximum response frequency of 1-phase counters

C235, C237,

C238

C236, C239,

C240

Maximum response frequency of 2-phase counters (kHz)

DHSCS, DHSCR

C235, C237,

C238

C236, C239,

C240

When one or two DHSZ

instructions are driven

C235, C237,

C238

C236, C239,

C240

1) The maximum response frequency of counters changes when the DHSCS, DHSCR and DHSZ instructions are used. For example, the maximum response frequency of C235 and C237 driven at the same time is 10 kHz (part A), but decreases to 4 kHz (part B) respectively when the DHSCS and DHSCR instructions are driven at the same time.

2) When the DHSCS, DHSCR and DHSZ instructions are driven at the same time, the maximum response frequency is equivalent to the maximum response frequency when the DHSZ instruction is driven.

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FXCPU Structured Programming Manual

[Device & Common]

7) In FX0/FX0N PLCs

2 Devices in Detail

2.7 High Speed Counter [C]

Device Outline

Counter type

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Software

counter

C235 to C238, C241 to C242, C244

C246 to C247, C249

C251 to C252, C254

Magnification for

calculating total

frequency

×15

×12

Maximum

response

frequency (kHz)

Total frequency

(kHz)

It is not allowed to use 1-phase counters and 2-phase counters together.

Calculation example

Used high speed counter No.

C235(1-phase) Software counter 1kHz ×11kHz C236(1-phase) Software counter 3kHz ×13kHz

Input/output

frequency

Magnification for calculating

Total frequency = 5 kHz Sum of processing frequency = 1 kHz + 3 kHz = 4 kHz Sum of processing frequency (4 kHz) ≤ Total frequency (5 kHz)

8) In FX

0S PLCs

total frequency

Calculated value

Constant

Devices in

Detail

Specified the

Device &

Special Device

Errors

Counter type

1-phase

1-counting

input

1-phase

2-counting

input

2-phase

2-counting

input

Magnification for

Software

counter

C235 to C238, C241 to C242, C244

C246 to C247, C249

C251 to C252, C254

C237(1-phase) Software counter 3kHz ×13kHz C238(1-phase) Software counter 3kHz ×13kHz C251(2-phase) Software counter 2kHz ×14kHz

calculating total

frequency

×17

×12

Used high speed counter No.

Maximum

response

frequency (kHz)

Total frequency

(kHz)

Input/output

frequency

Magnification for calculating

total frequency

Parameters

Calculated value

Total frequency = 14 kHz Sum of processing frequency = 3 kHz + 3 kHz + 4 kHz = 10 kHz Sum of processing frequency (10 kHz) ≤ Total frequency (14 kHz)

Types and

Setting of

Other Functions

Page 94

FXCPU Structured Programming Manual

[Device & Common]

2.7.11 Cautions on use

• For a contact to drive the coil of a high speed counter, use a contact which is normally ON during high speed counting.

Example : M8000(RUN monitor)

OUT_C_32

EN ENO

CC235

Program a contact which is normally ON during counting.

• If the operation of a high speed counter is triggered by a device equipped with a contact such as simulation switch, the counter may malfunction due to noise generated by chattering of the switch.

• The input filter of input terminals in the PLC main unit used for high speed counters are automatically set as follows:

3U/FX3UC PLCs: 5 µs (X000 to X005) or 50 µs (X006 and X007)

3G/FX3GC PLCs: 10 µs (X000, X001, X003 and X004) or 50 µs (X002 and X005 to X007)

3S PLC: 10 µs (X000 and X001) or 50 µs (X002 to X007)

1S/FX1N/FX1NC/FX2N/FX2NC PLCs: 20 µs (X000 and X001) or 50 µs (X002 to X005)

0S/FX0/FX0N/FXU/FX2C PLCs: 50 µs (X000 to X003 or X005)

FX Accordingly, it is not necessary to use the REFF instruction or special data register D8020 (input filter adjustment). The input filter of input relays not used for high speed counters remain 10 ms (initial value).

• Inputs X000 to X007 (X003) are used for high speed counters, input interrupt, pulse catch, SPD/DSZR/ DVIT/ZRN instructions and general-purpose inputs. Make sure to use each input terminal only once. For example, when C251 is used, X000 and X001 are occupied. As a result, "C235, C236, C241, C244, C246, C247, C249, C252 and C254", "input interrupt pointers I00* and I10*", "pulse catch contacts M8170 and M8171" and "SPD instruction using X000 and/or X001" cannot be used.

• When a counting input pulse is not provided, none of high speed counter output contacts does not turn ON even if the PLC executes an instruction in the status "Current value = Set value".

• Counting can be started or stopped in a high speed counter when the output coil (OUT C**) is set to ON or OFF. Program this output coil in the main routine. If the output coil is programmed in a step ladder circuit, subroutine or interrupt routine, counting cannot be started or stopped until the step ladder or routine is executed.

Make sure that the signal input to a high speed counter does not exceed the response frequency described

• above. If an input signal exceeds the response frequency, a WDT error or parallel link (communication) malfunction may occur.

• The response frequency changes depending on number of used counters, but the input filter value is fixed. Note that noise above the response frequency may be counted depending on the filter value of the used input.

• When a high speed counter is reset by the RST instruction, it cannot execute counting until driving of the RST instruction is set to OFF.

1) Program example

X010

CCoil CValue

RST

EN ENO

2 Devices in Detail

2.7 High Speed Counter [C]

Input number corresponding to C235

X000

CC235

OUT_C_32

EN ENO CCoil CValue

2) Timing chart

X000

Current value of C235

X010

RST C235

The current value does not change even

if pulses are input because the C235 reset instruction is valid.

C235 remains reset.

Driving of "RST C235" is set to ON because the contact turns ON.

Driving of "RST C235" is set to OFF because the contact turns OFF.

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FXCPU Structured Programming Manual

[Device & Common]

• Write the following program "to reset only the current value of a high speed counter (and not to turn OFF the contact)".

1) Program example

LDP

EN ENO

X010

ssd

*1. When the driving contact is the continuous execution type, the current value of the counter is reset to

"0" at each scan while X010 remains ON.

2) Timing chart

X000

EN ENO

K0 CN235

The current value of C235 is cleared (to "0").

DMOV

2 Devices in Detail

2.7 High Speed Counter [C]

Constant

Device Outline

Devices in

Detail

Specified the

Device &

Current value of C235

X010

Because X010 turns ON, "FNC12 DMOV" is executed. The current value of C235 is reset to "0".

Because the driving contact is the pulse execution type, C235 executes counting normally after that.

• Write the following program "to turn OFF the contact and reset the current value of a high speed counter".

1) Program example

X010

LDP

EN ENO

M8001

RUN monitor (Normally OFF)

RST

EN ENO

RST

EN ENO

- - - - - A)

CN235

- - - - - B)

CN235

*1. When the driving contact is the continuous execution type, the current value of the counter is reset to

"0" and the counter reset status is cleared at each scan while X010 remains ON.

2) Timing chart

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

X000

Because the reset status is cleared, C235 executes counting.

Current value of C235

X010

RST C235

Counter is reset (part A) in above program).

Driving of counter reset is set to OFF (part B) in above program).

• For writing the symbolic information and changing the set values of timers and counters using a peripheral equipment, it is recommended to create programs with the set values specified indirectly. If the set values are specified directly, programs cannot be restored from the symbolic information after the set values are changed.

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FXCPU Structured Programming Manual

[Device & Common]

2.8 Data Register and File Register [D]

Data registers store numeric values. File registers are handled as initial values of data registers. FX

0S and FX0 are not applicable to file registers.

Each data register or file register stores 16-bit data (whose most significant bit specifies the positive or negative sign). Two data registers or file registers combined can store 32-bit data (whose most significant bit specifies the positive or negative sign).

→ For the functions and operations of file registers, refer to Subsection 2.8.4.

2.8.1 Numbers of data registers and file registers

The tables below show data register and file register [D] numbers. (Numbers are assigned in decimal.)

1. In FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs

Data registers

Fixed latched

(battery backed-up)

type

D512 to D7999

7488 points

*3*4

FX3U/FX3UC PLCs

General type

D0 to D199

200 points

Latched (battery backed-up) type

D200 to D511

312 points

Special type

D8000 to D8511

512 points

2 Devices in Detail

2.8 Data Register and File Register [D]

File registers (latched (battery

backed-up) type)

D1000*4 and later

7000 points maximum

Data registers

File registers (latched (EEPROM

backed-up) type)

D1000*4 and later

7000 points maximum

File registers (latched (EEPROM

backed-up) type)

D1000*4 and later

2000 points maximum

FX3G/FX3GC PLCs

FX3S PLC

General type

D0 to D127

128 points

General type

D0 to D127

128 points

Fixed latched

(EEPROM backed-

up) type

D128 to D1099

972 points

Fixed latched

(EEPROM backed-

up) type)

D128 to D255

128 points

Data registers

General type Special type

D1100 to D7999

6900 points

General type Special type

D256 to D2999

2744 points

D8000 to D8511

512 points

D8000 to D8511

512 points

*1. This area is not latched, but can be changed to the latched (backed-up) area by parameter setting.

*2. This area is latched, but can be changed to the non-latched (non-backed-up) area by parameter

setting.

*3. The characteristics about latch (battery backup) cannot be changed using parameters.

*4. Data registers D1000 and later can be used as file registers in units of 500 points by parameter

setting.

*5. This area can be changed to the latched (battery backed-up) area by parameter setting while an

optional battery is attached, but the latched (battery backed-up) range cannot be specified.

When simple N:N link or parallel link is used, some data registers are occupied for the link.

→ Refer to the data communication manual.

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FXCPU Structured Programming Manual

[Device & Common]

2. In FX1S/FX1N/FX1NC/FX2N/FX2NC PLCs

Latched

General type

FX1S PLCs

FX1N/FX1NC PLCs

FX2N/FX2NC PLCs

D0 to D127

128 points

D0 to D127

128 points

D0 to D199

200 points

*1. This area is not latched, but can be changed to the latched (backed-up) area by parameter setting.

*2. This area is latched, but can be changed to the non-latched (non-backed-up) area by parameter

setting.

*3. The characteristics about latch (backup) cannot be changed using parameters.

*4. Data registers D1000 and later can be used as file registers in units of 500 points by parameter

setting.

When simple N:N link or parallel link is used, some data registers are occupied for the link.

(battery

backed-up)

D200 to D511

312 points

type

D512 to D7999

7488 points

Data registers

Fixed latched (battery backed-up) type

Battery

backed-up

EEPROM

backed-up

D128 to D255

128 points

D128 to D255

128 points

Capacitor

backed-up

D256 to D7999

7744 points

→ Refer to the data communication manual.

2 Devices in Detail

2.8 Data Register and File Register [D]

Device Outline

File registers

Special type

D8000 to D8255

256 points

D8000 to D8255

256 points

D8000 to D8255

256 points

(latched (battery

backed-up) type)

D1000*4 and later

1500 points maximum

D1000*4 and later

7000 points maximum

D1000*4 and later

7000 points maximum

Constant

Devices in

Detail

Specified the

Device &

Special Device

3. FX0S/FX0/FX0N/FXU/FX2C PLCs

Data registers

Fixed latched

(backed-up) type

D30, 31

2 points

D128 to D255

128 points

D512 to D999

488 points

Special type

D8000 to D8069

27 points

D8000 to D8129

38 points

D8000 to D8137

85 points

D8000 to D8135

69 points

FX0/FX0S PLCs

FX0N PLCs

FXU/FX2C PLCs

FXU PLCs (Ver. 2.30 or earlier) (Reference)

General type Latched (backed-up) type

D0 to D29

30 points

D0 to D127

128 points

D0 to D199

200 points

Master→Slave:D490 to D499 Slave→Master:D500 to D509

D200 to D511

312 points

For link

*1. This area is not latched, but can be changed to the latched (backed-up) area by parameter setting.

*2. This area is latched, but can be changed to the non-latched (non-backed-up) area by parameter

setting.

*3. This area is fixed to the latched (backed-up) type (, and the contents can be cleared by the RST and

ZRST instructions).

*4. This area is fixed to the non-latched (non-backed-up) type (, and the characteristics about latch

(backup) cannot be changed).

*5. Data registers D1000 and later can be used as file registers in units of 500 points by parameter

setting.

*6. Data registers D6000 to D7999 can be used as file registers by driving the special auxiliary relay

M8074 and prohibiting sampling trace. Different from file registers secured inside the program memory, D6000 to D7999 are secured inside the system memory of the PLC, and may be called "RAM file registers" (to notify that they are the latched type).

File registers

D1000*5 and later

1500 points maximum

D1000*5 and later

2000 points maximum

D6000 to D7999

2000 points(RAM file)

Errors

Types and

Setting of

Parameters

Other Functions

Page 98

FXCPU Structured Programming Manual

[Device & Common]

2.8.2 Structure of data registers and file registers

1) 16-bit type

One (16-bit) data register or file register can store a numeric value within the range from -32768 to +32767.

2 Devices in Detail

2.8 Data Register and File Register [D]

4,096

8,192

2,048

D 0(16-bit type)

128

256

512

1,024

1010101010101010

High order Low orde

b15

Sign 0 : Positive

1 : Negative

16,384

A numeric value can be read from or written to a data register by an instruction usually. Or a numeric value can be directly read from or written to a data register from a display unit, display module or programming tool.

2) 32-bit type

Two serial data registers or file registers can express 32-bit data.

- A data register having a larger device number handles high-order 16 bits, and a data register having a

smaller device number handles low-order 16 bits.

- In the index type, V handles high-order 16 bits, and Z handles low-order 16 bits.

- Two serial data registers or file registers can store a numeric value within the range from -2,147,483,648

to +2,147,483,647.

High order Low orde

b31 b0

Sign 0 : Positive

1 : Negative

D 1(High-order 16 bits) D 0(Low-order 16 bits)

1010101010101010

1,024

2,048

4,096

8,192

16,384

32,768

65,536

131,072

262,144

524,288

1,048,576

2,097,152

4,194,304

8,388,608

16,777,216

33,554,432

67,108,864

134,217,728

268,435,456

536,870,912

1,073,741,824

512

256

128

0000111100001111

In the case of 32-bit type, when a data register or file register on the low-order side (Example: D0) is specified, the subsequent number on the high-order side (Example: D1) is automatically occupied. Either an odd or even device number can be specified for the low-order side, but it is recommended to specify an even device number for the low-order side under consideration of the monitoring function of display units, display modules and programming tools.

2.8.3 Functions and operation examples of data registers

Data registers store numeric data. Each data register stores 16-bit data (whose most significant bit specifies the positive or negative sign). Two data registers combined can store 32-bit data (whose most significant bit specifies the positive or negative sign).

1. General type and latched (backed-up) type data registers

• Once data is written to a data register, it does not change unless other data overwrites it. When the PLC mode switches from "RUN" to "STOP" or when the power is interrupted, however, all data stored in general type data registers are cleared to "0". If the special auxiliary relay M8033 has been driven in advance, data are held even when the PLC mode switches from "RUN" to "STOP".

• Latched (backed-up) type data registers hold their contents even when the PLC mode switches from "RUN" to "STOP" or when the power is interrupted.

• The contents of data registers are latched (backed up) by a battery, EEPROM, etc. built in the PLC.

→ For details on each backup method, refer to Section 2.6.

• When using fixed latched (backed-up) type data registers as general type registers, provide the following reset circuit using the RST or ZRST instruction at the head step in a program.

M8002

Initial pulse

ZRST

EN ENO

d1 d2

Data stored in D512 to D999 are cleared to "0". D512 D999

→ For file registers, refer to Subsection 2.8.4.

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FXCPU Structured Programming Manual

[Device & Common]

2. Special type data registers

• Special type data registers store specific data in advance, or receive data for special purpose. The contents of special data registers are set to their initial values when the power is turned ON. (Generally, these data registers are cleared to "0" first, and then initial values (if there are any) are written by the system ROM.)

• For example, the watchdog timer time is set initially to D8000 by the system ROM. To change the contents, write desired time to D8000 using the transfer instruction MOV.

2 Devices in Detail

2.8 Data Register and File Register [D]

Device Outline

Devices in

Detail

M8002

Initial pulse

K250

MOV

ENsENO

WDT

EN ENO

The watchdog timer is set to 250 ms.

D8000

The watchdog timer is refreshed.

→ For the backup characteristics of special data registers, refer to Section 1.2 and Chapter 4.

→ For types and functions of special data registers, refer to Chapter 4.

3. Operation examples

Data registers can be used in various controls handling numeric data. This paragraph explains representative operation examples among various applications. For the full use of data registers, refer to the explanation on applied instructions provided later.

1) Specifying the set value of a timer or counter

OUT_T

EN ENO TCoil

TC2

TValue

OUT_C

EN ENO

D20

CCoil CValue

CC10

2) Operation examples using the MOV instruction

a) Changing the current value of a counter

MOV

ENsENO

D5 CN2

A counter or timer operates while regarding the contents of a specified data register as its set value.

The current value of the counter C2 is changed to the contents of D5.

Specified the

Device &

Constant

Special Device

Errors

Types and

Setting of

Parameters

Other Functions

b) Reading the current value of a timer or counter

MOV

ENsENO

CN10 D4

c) Storing a numeric value in data registers

16-bit type

MOV

ENsENO

K200 D10

32-bit type

DMOV

ENsENO

K80000 D10

The current value of the counter C10 is transferred to D4.

"200 (decimal value)" is transferred to D10.

"80000 (decimal value)" is transferred to D10 and D11. Because a numeric value larger than "32767" is 32-bit data, a 32-bit operation is required. When a data register on the low-order side (D10) is specified, a data register on the high-order side (D11) is automatically occupied.

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FXCPU Structured Programming Manual

[Device & Common]

d) Transferring the contents of a data register to another data register

MOV

ENsENO

D10 D20

3) Using unoccupied timers and counters as data registers

Operation example using the MOV instruction Timers and counters not used in a program can be used as devices for storing 16-bit or 32-bit numeric values (data registers).

MOV

ENsENO

K300

MOV

ENsENO

TN10

With regard to 32-bit data, two 16-bit timers or counters (such as C1 and C0) can express 32-bit data in the same way as data registers. Each 32-bit counter (such as C200) can handle 32-bit data individually.

2 Devices in Detail

2.8 Data Register and File Register [D]

The contents of D10 are transferred to D20.

"300 (decimal value)" is transferred to T10.

TN10

The contents of T10 are transferred to the current

CN20

value register of C20. In this case, T10 is not working as a timer, but is working as a data register.