Mitsubishi Electronics MELSEC-L, LD62D User Manual

MELSEC-L High-Speed Counter Module
User's Manual

-LD62

-LD62D

SAFETY PRECAUTIONS

WARNING

CAUTION

Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.

Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.

(Read these precautions before using this product.)

Before using this product, please read this manual and the relevant manuals carefully and pay full attention
to safety to handle the product correctly.
The precautions given in this manual are concerned with this product only. For the safety precautions of the
programmable controller system, refer to the user's manual for the CPU module used.

In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".

Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to

serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.

Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.

[Design Precautions]

WARNING

● In an output circuit, when a load current exceeding the rated current or an overcurrent caused by a
load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.

● Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an input signal from the CPU module to the intelligent
function module.
Doing so may cause malfunction of the programmable controller system.

● Outputs may remain on or off due to a failure of a transistor for external output. Configure an external
circuit for monitoring output signals that could cause a serious accident.

[Design Precautions]

CAUTION

● Do not install the control lines or communication cables together with the main circuit lines or power
cables. Keep a distance of 150mm or more between them. Failure to do so may result in malfunction
due to noise.

1

[Installation Precautions]

WARNING

● Shut off the external power supply (all phases) used in the system before mounting or removing a
module. Failure to do so may result in electric shock or cause the module to fail or malfunction.

[Installation Precautions]

CAUTION

● Use the programmable controller in an environment that meets the general specifications in the Safety
Guidelines provided with the CPU module or head module. Failure to do so may result in electric
shock, fire, malfunction, or damage to or deterioration of the product.

● To interconnect modules, engage the respective connectors and securely lock the module joint levers
until they click. Incorrect interconnection may cause malfunction, failure, or drop of the module.

● Do not directly touch any conductive parts and electronic components of the module. Doing so can
cause malfunction or failure of the module.

[Wiring Precautions]

WARNING

● Shut off the external power supply (all phases) used in the system before wiring. Failure to do so may
result in electric shock or cause the module to fail or malfunction.

2

[Wiring Precautions]

CAUTION

● Individually ground the FG and LG terminals of the programmable controller with a ground resistance

of 100 or less. Failure to do so may result in electric shock or malfunction.

● Check the rated voltage and terminal layout before wiring to the module, and connect the cables
correctly. Connecting a power supply with a different voltage rating or incorrect wiring may cause a fire
or failure.

● Connectors for external devices must be crimped with the tool specified by the manufacturer or must
be correctly soldered.
Incomplete connections may cause short circuit, fire, or malfunction.

● Place the cables in a duct or clamp them. If not, dangling cable may swing or inadvertently be pulled,
resulting in damage to the module or cables or malfunction due to poor contact.

● Tighten the connector screws within the specified torque range.
Undertightening can cause drop of the screw, short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, fire, or
malfunction.

● When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable with connector, hold the connector part of the cable.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.

● Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can
cause a fire, failure, or malfunction.

● A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring. Do not remove the film during wiring. Remove it for heat
dissipation before system operation.

● Ground the shield cable on the encoder side (relay box). Always ground the FG and LG terminals to
the protective ground conductor. Failure to do so may cause malfunction.

● Mitsubishi programmable controllers must be installed in control panels. Connect the main power
supply to the power supply module in the control panel through a relay terminal block. Wiring and
replacement of a power supply module must be performed by qualified maintenance personnel with
knowledge of protection against electric shock. For wiring methods, refer to the MELSEC-L CPU
Module User's Manual (Hardware Design, Maintenance and Inspection).

3

[Startup and Maintenance Precautions]

WARNING

● Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.

● Shut off the external power supply (all phases) used in the system before cleaning the module or

retightening the connector screws. Failure to do so may result in electric shock.

[Startup and Maintenance Precautions]

CAUTION

● Do not disassemble or modify the module. Doing so may cause failure, malfunction, injury, or a fire.

● Shut off the external power supply (all phases) used in the system before mounting or removing a

module. Failure to do so may cause the module to fail or malfunction.

● After the first use of the product (module and display unit), do not connect/disconnect the product
more than 50 times (in accordance with IEC 61131-2). Exceeding the limit may cause malfunction.

● Tighten the connector screws within the specified torque range. Undertightening can cause drop of
the component or wire, short circuit, or malfunction. Overtightening can damage the screw and/or
module, resulting in drop, short circuit, or malfunction.

● Before handling the module, touch a conducting object such as a grounded metal to discharge the
static electricity from the human body. Failure to do so may cause the module to fail or malfunction.

[Disposal Precautions]

CAUTION

● When disposing of this product, treat it as industrial waste.

4

CONDITIONS OF USE FOR THE PRODUCT

(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;

i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or serious accident;

and

ii) where the backup and fail-safe function are systematically or automatically provided outside of the PRODUCT for the

case of any problem, fault or failure occurring in the PRODUCT.

(2) The PRODUCT has been designed and manufactured for the purpose of being used in general industries.

MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED TO ANY AND ALL

RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY

INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE

OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR

WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL

BULLETINS AND GUIDELINES FOR the PRODUCT.

("Prohibited Application")

Prohibited Applications include, but not limited to, the use of the PRODUCT in;

• Nuclear Power Plants and any other power plants operated by Power companies, and/or any other cases in which the

public could be affected if any problem or fault occurs in the PRODUCT.

• Railway companies or Public service purposes, and/or any other cases in which establishment of a special quality

assurance system is required by the Purchaser or End User.

• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator and Escalator,

Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for Recreation and Amusement, and

Safety devices, handling of Nuclear or Hazardous Materials or Chemicals, Mining and Drilling, and/or other

applications where there is a significant risk of injury to the public or property.

Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the PRODUCT in one or

more of the Prohibited Applications, provided that the usage of the PRODUCT is limited only for the specific

applications agreed to by Mitsubishi and provided further that no special quality assurance or fail-safe, redundant or

other safety features which exceed the general specifications of the PRODUCTs are required. For details, please

contact the Mitsubishi representative in your region.

5

INTRODUCTION

Remark

Thank you for purchasing the Mitsubishi MELSEC-L series programmable controllers.

This manual describes the functions and programming of a high-speed counter module.

Before using this product, please read this manual and the relevant manuals carefully and develop familiarity with the

functions and performance of the MELSEC-L series programmable controller to handle the product correctly.

When applying the program examples introduced in this manual to an actual system, ensure the applicability and

confirm that it will not cause system control problems.

Relevant modules: LD62, LD62D

Unless otherwise specified, this manual describes the program examples in which the I/O numbers of X/Y00 to X/Y0F are
assigned for a high-speed counter module.
For I/O number assignment, refer to the following.

MELSEC-L CPU Module User's Manual (Function Explanation, Program Fundamentals)

Operating procedures are explained using GX Works2. When using GX Developer or GX Configurator-CT, refer to the
following.

• When using GX Developer or GX Configurator-CT ( Page 120, Appendix 5)

6

COMPLIANCE WITH EMC AND LOW VOLTAGE

DIRECTIVES

(1) Method of ensuring compliance

To ensure that Mitsubishi programmable controllers maintain EMC and Low Voltage Directives when incorporated

into other machinery or equipment, certain measures may be necessary. Please refer to one of the following

manuals.

• MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

• MELSEC-L CC-Link IE Field Network Head Module User's Manual

• Safety Guidelines (This manual is included with the CPU module or head module.)

The CE mark on the side of the programmable controller indicates compliance with EMC and Low Voltage

Directives.

(2) Additional measures

To ensure that this product maintains EMC and Low Voltage Directives, please refer to Page 37, Section 6.2.1

(4).

7

RELEVANT MANUALS

(1) CPU module user's manual

Manual name

<manual number (model code)>

MELSEC-L CPU Module User's Manual (Hardware Design,

Maintenance and Inspection)

<SH-080890ENG, 13JZ36>

MELSEC-L CPU Module User's Manual (Function Explanation,

Program Fundamentals)

<SH-080889ENG, 13JZ35>

(2) Head module user's manual

Manual name

<manual number (model code)>

MELSEC-L CC-Link IE Field Network Head Module User's Manual

<SH-080919ENG, 13JZ48>

(3) Operating manual

Manual name

<manual number (model code)>

GX Works2 Version 1 Operating Manual (Common)

<SH-080779ENG, 13JU63>

GX Developer Version 8 Operating Manual

<SH-080373E, 13JU41>

Description

Specifications of the CPU modules, power supply modules, display

unit, branch module, extension module, SD memory cards, and

batteries, information on how to establish a system, maintenance

and inspection, and troubleshooting

Functions and devices of the CPU module, and programming

Description

Specifications, procedures before operation, system configuration,

installation, wiring, settings, and troubleshooting of the head module

Description

System configuration, parameter settings, and online operations of

GX Works2, which are common to Simple projects and Structured

projects

Operating methods of GX Developer, such as programming,

printing, monitoring, and debugging

8

Memo

9

CONTENTS

CONTENTS

SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

MANUAL PAGE ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

PACKING LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

CHAPTER 1 HIGH-SPEED COUNTER MODULE 15

1.1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

CHAPTER 2 PART NAMES 18

CHAPTER 3 SPECIFICATIONS 20

3.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.2 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.2.1 Number of parameters that can be set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.3 Function List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.4 List of I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.5 List of Buffer Memory Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

CHAPTER 4 PROCEDURES BEFORE OPERATION 29

CHAPTER 5 SYSTEM CONFIGURATION 31

5.1 Overall Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.2 Applicable System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2.1 Restrictions when the high-speed counter module is connected to the head module . . . . . . .33

CHAPTER 6 INSTALLATION AND WIRING 34

6.1 Installation Environment and Installation Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.2.1 Wiring precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

6.2.2 Connectors for external devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.2.3 Interface with external devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

6.2.4 Connectable encoders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

6.3 Examples of Wiring Between the High-Speed Counter Module and an Encoder . . . . . . . . . . . 47

6.4 Examples of Wiring Between a Controller and External Input Terminals . . . . . . . . . . . . . . . . . 49

6.5 Examples of Wiring with External Output Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

CHAPTER 7 SETTINGS 53

7.1 Adding a Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7.2 Switch Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

10

7.3 Intelligent Function Module Detailed Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.4 Parameter Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

7.5 Auto Refresh. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

CHAPTER 8 FUNCTIONS 58

8.1 Pulse Input Modes and Counting Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.1.1 Types of pulse input modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

8.1.2 Setting a counting method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

8.1.3 Reading the present value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.2 Selecting Counter Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.2.1 Linear counter function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

8.2.2 Ring counter function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

8.3 Coincidence Output Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

8.4 Preset Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

8.5 Counter Function Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

8.5.1 Reading the counter function selection count value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

8.5.2 Count error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

8.6 Count Disable Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

8.7 Latch Counter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

8.8 Sampling Counter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8.9 Periodic Pulse Counter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

CHAPTER 9 DISPLAY UNIT 83

9.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9.2 Menu Transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9.3 List of Setting Value Change Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

CHAPTER 10 PROGRAMMING 88

10.1 Using the Module in Standard System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

10.2 Connecting the Module to the Head Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

10.3 Program Example with the Coincidence Detection Interrupt Function . . . . . . . . . . . . . . . . . . 106

CHAPTER 11 TROUBLESHOOTING 108

11.1 Error Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

11.2 The Module Does Not Start Counting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

11.3 The Module Does Not Correctly Count Pulses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

11.4 Coincidence Output Function Does Not Correctly Operate . . . . . . . . . . . . . . . . . . . . . . . . . . 110

11.5 Coincidence Detection Interrupt Does Not Occur. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

11.6 Present Value Cannot be Replaced with the Preset Value. . . . . . . . . . . . . . . . . . . . . . . . . . . 110

11.7 Pulse Waveform Shaping Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

APPENDICES 112

Appendix 1 Details of I/O Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

11

Appendix 1.1 Input signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Appendix 1.2 Output signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Appendix 2 Details of Buffer Memory Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Appendix 3 Checking Serial Number and Function Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Appendix 4 Differences Between L Series and Q Series Modules . . . . . . . . . . . . . . . . . . . . . . . . . 119

Appendix 5 When Using GX Developer and GX Configurator-CT . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Appendix 5.1 GX Developer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

Appendix 5.2 GX Configurator-CT operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

Appendix 6 External Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

INDEX 128

REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

12

MANUAL PAGE ORGANIZATION

The section of
the current page is shown.

The chapter of
the current page is shown.

"" is used for
screen names and items.

[ ] is used for items
in the menu bar and
the project window.

shows operating
procedures.

shows reference
manuals.

shows notes that
requires attention.

shows mouse
operations.

*1

shows
reference pages.

shows setting or
operating examples.

Ex.

shows useful
information.

A window selected in the view selection area is displayed.

View selection area

[Online] [Write to PLC...]

Select [Online] on the menu bar,
and then select [Write to PLC...].

Project window

[Parameter]

[PLC Parameter]

Select [Project] from the view selection
area to open the Project window.

Menu bar

Ex.

Ex.

In the Project window, expand [Parameter] and
select [PLC Parameter].

In this manual, pages are organized and the symbols are used as shown below.

The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.

*1 The mouse operation example (for GX Works2) is provided below.

13

TERMS

Unless otherwise specified, this manual uses the following terms.

Term Description

High-speed counter module Another term for the MELSEC-L series high-speed counter module

Head module Abbreviation for the LJ72GF15-T2 CC-Link IE Field Network head module

Display unit A liquid crystal display to be attached to the CPU module

Programming tool Generic term for GX Works2 and GX Developer

GX Works2

GX Developer

GX Configurator-CT A setting and monitoring tool added in GX Developer (for high-speed counter modules)

Buffer memory

The product name of the software package for the MELSEC programmable controllers

A memory in an intelligent function module, where data (such as setting values and monitoring values)

exchanged with a CPU module are stored

PACKING LIST

The following items are included in the package of this product. Before use, check that all the items are included.

High-speed counter module

14

Module

Before Using the Product

CHAPTER 1 HIGH-SPEED COUNTER MODULE

CH1

CH2

Encoder (pulse generator)

Encoder

(pulse generator)

Temporarily stops the inverter. (Coincidence output)

CHAPTER 1 HIGH-SPEED COUNTER MODULE

This chapter describes the application and the features of the high-speed counter module.

1.1 Application

The high-speed counter module is capable of counting the number of inputs of a high-speed pulse that cannot be

measured by a sequence using general-purpose input modules.

1

1.1 Application

15

1.2 Features

(1) Offering counting capability over the wide range from -2147483648 to

2147483647

• The module stores a count value in 32-bit signed binary.

• The number of channels is two.

(2) Switching the maximum counting speed

For the LD62D, 500k/200k/100k/10k can be switched and for the LD62, 200k/100k/10k can be switched, thereby

achieving an error-free count even if a pulse has a gradual rising/falling edge.

(3) Allowing selection of pulse input

The pulse input mode can be selected from the following: 1-phase multiple of 1, 1-phase multiple of 2, 2-phase

multiple of 1, 2-phase multiple of 2, 2-phase multiple of 4, and CW/CCW.

(4) Allowing selection of counter types

Either one of the following counter types can be selected.

(a) Linear counter type

This type is capable of counting pulses ranging from -2147483648 to 2147483647 and detects an overflow if

this range is exceeded.

(b) Ring counter type

This type counts pulses repeatedly under the range of the ring counter upper limit value and the ring counter

lower limit value.

(5) Permitting coincidence output

Outputting on/off signals or initiating an interrupt program is possible at the timing when a coincidence output

point, which is set arbitrarily beforehand, matches the current value in comparison with each other.

(6) Allowing selection from the four counter functions

One of the following functions can be selected for use.

(a) Count disable function

This function makes the pulse count stop by inputting a signal while CH Count enable command (Y4, YC) is

on.

(b) Latch counter function

This function latches the current value of a counter at the time of input of a signal.

(c) Sampling counter function

Of input signals, this function counts pulses that are input during a time specified beforehand.

(d) Periodic pulse counter function

While signals are input, this function stores the current value and previous value of a counter at each pre-

specified period.

16

CHAPTER 1 HIGH-SPEED COUNTER MODULE

(7) Executing the preset function and the counter function selection via external

control signals

• Applying a voltage to the preset input terminal allows the preset function to be performed.

• Applying a voltage to the function start input terminal allows the counter function selection to be performed.

(8) Easy settings with GX Works2

GX Works2 allows Initial settings and auto refresh settings to be configured on the window, resulting in the

reduction of programs and making it easier to check the status of module settings and operation.

1

1.2 Features

17

CHAPTER 2 PART NAMES

The following table lists the part names of the high-speed counter module.

1)

7)

1)

No. Name Description

1) Module joint levers Levers for connecting two modules

2) A LED On: A voltage is being applied to the phase A pulse input terminal.

3) B LED On: A voltage is being applied to the phase B pulse input terminal.

4) DEC. LED On: Pulses are being counted down.

5) FUNC. LED On: A voltage is being applied to the function start input terminal.

6) DIN rail hook A hook used to mount the module to a DIN rail

7)

8) Serial number display Displays the serial number printed on the rating plate.

Connector for external

devices (40 pins)

8)

2)

3)

4)

5)

A connector for I/O signal cables of external devices ( Page 41, Section 6.2.3)

1)

1)

6)

18

Memo

CHAPTER 2 PART NAMES

2

19

CHAPTER 3 SPECIFICATIONS

This chapter describes general specifications, performance specifications, functions, I/O signals, and buffer memory

areas.

3.1 General Specifications

For the general specifications of the high-speed counter module, refer to the following.

Safety Guidelines, provided with the CPU module or head module

20

3.2 Performance Specifications

2.5 2.5

5

(Unit : s)

55

10

(Unit : s)

50 50

100

(Unit : s)

The following table describes the performance specifications of the high-speed counter module.

(1) LD62 (DC input sink output type)

CHAPTER 3 SPECIFICATIONS

Item Specifications

Counting speed switch setting

Number of occupied I/O points 16 points (I/O assignment: Intelligent, 16 points)

Number of channels 2 channels

Phase

Count input signal

Counter

Coincidence

output

External input

External output Coincidence output

Internal current consumption (5VDC) 0.31A

Weight 0.13kg

Signal level
(A, B)

Counting speed

(maximum)

Counting range 32-bit signed binary (-2147483648 to 2147483647)

Type UP/DOWN preset counter + Ring counter functions

Minimum count pulse

width

(duty ratio 50%)

Comparison range 32-bit signed binary

Comparison result

Preset

Function start

*1

*2

200k (100k to 200kPPS) 100k (10k to 100kPPS) 10k (10kPPS or less)

1-phase input (1 multiple/2 multiples), 2-phase input (1 multiple/2 multiples/4 multiples),

CW/CCW input

5/12/24VDC 2 to 5mA

200kPPS 100kPPS 10kPPS

(Minimum phase difference

in 2-phase input 1.25s)

Transistor (sink type) output, 2 points/channel

(Minimum phase difference

in 2-phase input 2.5s)

Setting value < Count value

Setting value = Count value

Setting value > Count value

5/12/24VDC

2 to 5mA

12/24VDC 0.5A/point, 2A/common

(Minimum phase difference

in 2-phase input 25s)

3

3.2 Performance Specifications

21

*1 The value can be configured in intelligent function module switch setting.

tt

*2 The counting speed is affected by the pulse rise/fall time.

The number of pulses that can be counted depending on the counting speed is as follows. Note that the count may be
incorrect when pulses with long rise/fall time are counted.

Counting speed switch

setting

200k 100k 10k

Rise/fall time Both 1- and 2-phase inputs

t = 1.25s or less 200kPPS 100kPPS 10kPPS

t = 2.5s or less 100kPPS 100kPPS 10kPPS

t = 25s or less  10kPPS 10kPPS

t = 500s 500PPS

(2) LD62D (differential input sink output type)

Item Specifications

Counting speed switch setting

*1

500k (200k to

500kPPS)

Number of occupied I/O points 16 points (I/O assignment: Intelligent, 16 points)

Number of channels 2 channels

1-phase input (1 multiple/2 multiples), 2-phase input (1 multiple/2 multiples/4 multiples),

(AM26LS31 (manufactured by Texas Instruments Incorporated) or equivalent)

500kPPS 200kPPS 100kPPS 10kPPS

Count input signal

Phase

Signal level
(A, B)

Counting speed

(maximum)

*2

Counting range 32-bit signed binary (-2147483648 to 2147483647)

Type UP/DOWN preset counter + Ring counter functions

200k (100k to

200kPPS)

CW/CCW input

EIA Standard RS-422-A

Differential line driver level

100k (10k to

100kPPS)

10k (10kPPS or less)

Counter

2

5

Minimum count pulse

width

(duty ratio 50%)

11

(Unit : s)

(Minimum phase

difference in 2-phase

input 0.5s)

2.5 2.5
(Unit : s)

(Minimum phase

difference in 2-phase

input 1.25s)

Comparison range 32-bit signed binary

Coincidence

output

Comparison result

Setting value < Count value

Setting value = Count value

Setting value > Count value

External input

Preset

Function start

External output Coincidence output

(EIA Standard RS-422-A differential line driver can be connected.)

Transistor (sink type) output, 2 points/channel

5/12/24VDC 2 to 5mA

12/24VDC 0.5A/point, 2A/common

Internal current consumption (5VDC) 0.36A

Weight 0.13kg

22

10

55

(Unit : s)

(Minimum phase

difference in 2-phase

input 2.5s)

100

50 50

(Unit : s)

(Minimum phase

difference in 2-phase

input 25s)

CHAPTER 3 SPECIFICATIONS

*1 The value can be configured in intelligent function module switch setting.
*2 The counting speed is affected by the pulse rise/fall time.

The number of pulses that can be counted depending on the counting speed is as follows. Note that the count may be
incorrect when pulses with long rise/fall time are counted.

Counting speed switch

setting

Rise/fall time Both 1- and 2-phase inputs

t = 0.5s or less 500kPPS 200kPPS 100kPPS 10kPPS

t = 1.25s or less 200kPPS 200kPPS 100kPPS 10kPPS

t = 2.5s or less  100kPPS 100kPPS 10kPPS

t = 25s or less 10kPPS 10kPPS

t = 500s 500PPS

500k 200k 100k 10k

tt

3

3.2.1 Number of parameters that can be set

Configure the parameters of the initial setting and the auto refresh of the high-speed counter module within the number

of parameters that can be set to the CPU module or head module, including the number of parameters set for other

intelligent function modules. For the number of parameters that can be set to the CPU module and head module, refer

to the following.

MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

MELSEC-L CC-Link IE Field Network Head Module User's Manual

(1) Number of high-speed counter module parameters

The following number of parameters can be set for one high-speed counter module.

Model Initial setting Auto refresh

LD62 8 14 (maximum number of parameters)

LD62D 8 14 (maximum number of parameters)

3.2 Performance Specifications

3.2.1 Number of parameters that can be set

23

(2) Checking the number of parameters

The number of parameters set for the intelligent function module and the maximum number of parameters can be

checked by the following operation.

Project window [Intelligent Function Module] Right-click [Intelligent Function Module

Parameter List]

1) 2) 3) 4)

No. Description

1) The total number of parameters that have been selected under "Initialization (Count)"

2) The maximum number of parameters for initial setting

3) The total number of parameters that have been selected under "Auto Refresh (Count)"

4) The maximum number of parameters for auto refresh setting

24

3.3 Function List

The following table lists the functions of the high-speed counter module.

Item Description Reference

Linear counter function

Ring counter function

Coincidence

output function

Preset function

Counter function

selection

Coincidence

detection

interrupt

function

Count disable

function

Latch counter

function

Sampling

counter function

Periodic pulse

counter function



This function counts pulses between -2147483648 and 2147483647 and detects an

overflow if the count value is outside the range.

This function repeatedly counts pulses between the ring counter upper limit value

and the ring counter lower limit value.

This function compares the present counter value with the preset coincidence output

point setting value and outputs on or off signal when they match.

This function outputs an interrupt signal to the CPU module and starts an interrupt

program when the present counter value matches with the preset coincidence output

point setting value.

This function overwrites the present counter value with the preset value.

This function is performed by a program or an external control signal (preset input).

This function stops counting pulses while CH Count enable command (Y4, YC) is

on.

This function stores the present counter value to the buffer memory when the

counter function selection start command signal is input.

This function is performed by a program or an external control signal (function input).

This function counts pulses input during the specified sampling period after the

counter function selection start command is input and stores the counter value to the

buffer memory.

This function is performed by a program or an external control signal (function input).

This function stores the present and previous counter values to the corresponding

buffer memory areas at the preset cycle while the counter function selection start

command signal is input.

CHAPTER 3 SPECIFICATIONS

Page 64,

Section 8.2.1

Page 65,

Section 8.2.2

Page 68,

Section 8.3

Page 73,

Section 8.4

Page 78,

Section 8.6

Page 79,

Section 8.7

Page 80,

Section 8.8

Page 81,

Section 8.9

3

3.3 Function List

● These functions can be used together.
However, select either the linear counter function or the ring counter function and any one of the counter functions from
counter function selection.

● The preset function and the function selected from counter function selection can also be performed by the following
external inputs.

• To use the preset function, apply a voltage to the preset input terminal.

• To use any function of the counter function selection, apply a voltage to the function start input terminal.

25

3.4 List of I/O Signals

The following table lists the I/O signals of the high-speed counter module.

For details on the I/O signals, refer to the following.

• Details of I/O signals ( Page 112, Appendix 1)

Input signal Output signal

Device No. Signal name Device No. Signal name

X0 Module READY Y0

X1 CH1 Counter value large (point No.1) Y1 CH1 Preset command

X2 CH1 Counter value coincidence (point No.1) Y2 CH1 Coincidence signal enable command

X3 CH1 Counter value small (point No.1) Y3 CH1 Down count command

X4 CH1 External preset request detection Y4 CH1 Count enable command

X5 CH1 Counter value large (point No.2) Y5

X6 CH1 Counter value coincidence (point No.2) Y6

X7 CH1 Counter value small (point No.2) Y7

X8 CH2 Counter value large (point No.1) Y8

X9 CH2 Counter value coincidence (point No.1) Y9 CH2 Preset command

XA CH2 Counter value small (point No.1) YA CH2 Coincidence signal enable command

XB CH2 External preset request detection YB CH2 Down count command

XC CH2 Counter value large (point No.2) YC CH2 Count enable command

XD CH2 Counter value coincidence (point No.2) YD

XE CH2 Counter value small (point No.2) YE

XF Use prohibited YF

CH1 Coincidence signal No.1 reset

command

CH1 External preset detection reset

command

CH1 Counter function selection start

command

CH1 Coincidence signal No.2 reset

command

CH2 Coincidence signal No.1 reset

command

CH2 External preset detection reset

command

CH2 Counter function selection start

command

CH2 Coincidence signal No.2 reset

command

26

● The I/O numbers (X/Y) above apply when the start I/O number of the high-speed counter module is set to "0".

● The use prohibited signal above is used by the system and is not available for users. If used (turned on) by a user, the

performance of the high-speed counter module is not guaranteed.

3.5 List of Buffer Memory Areas

The following table lists the buffer memory areas of the high-speed counter module.

For details on the buffer memory areas, refer to the following.

• Details of Buffer Memory Areas ( Page 116, Appendix 2)

Address

(decimal)

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

31

32

33

34

35

36

37

38

39

Address

(hexadecimal)

0

H

1

H

2

H

3

H

4

H

5

H

6

H

7

H

8

H

9

H

A

H

B

H

C

H

D

H

E

H

F

H

10

H

11

H

12

H

13

H

14

H

15

H

16

H

17

H

18

H

1F

H

20

H

21

H

22

H

23

H

24

H

25

H

26

H

27

H

Name

CH1 Preset value (L)

CH1 Preset value (H)

CH1 Present value (L)

CH1 Present value (H)

CH1 Coincidence output point No.1 (L)

CH1 Coincidence output point No.1 (H)

CH1 Coincidence output point No.2 (L)

CH1 Coincidence output point No.2 (H)

CH1 Overflow detection 0 R

CH1 Counter function selection 0 R/W

CH1 Sampling/periodic time setting 0 R/W

CH1 Sampling/periodic counter flag 0 R

CH1 Latch count value (L)

CH1 Latch count value (H)

CH1 Sampling count value (L)

CH1 Sampling count value (H)

CH1 Periodic pulse count previous value (L)

CH1 Periodic pulse count previous value (H)

CH1 Periodic pulse count present value (L)

CH1 Periodic pulse count present value (H)

CH1 Ring counter lower limit (L)

CH1 Ring counter lower limit (H)

CH1 Ring counter upper limit (L)

CH1 Ring counter upper limit (H)

System area to to

CH2 Preset value (L)

CH2 Preset value (H)

CH2 Present value (L)

CH2 Present value (H)

CH2 Coincidence output point No.1 (L)

CH2 Coincidence output point No.1 (H)

CH2 Coincidence output point No.2 (L)

CH2 Coincidence output point No.2 (H)

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

CHAPTER 3 SPECIFICATIONS

Initial value

*1

Read/write

*2

3

0R/W

0R/W

0R

0R

*3

*3

*3

*3

0R/W

0R/W

0R/W

0R/W

0R

0R

0R

3.5 List of Buffer Memory Areas

0R

*3

*3

*3

*3

0R

0R

0R

0R

0R/W

0R/W

0R/W

0R/W

0R/W

0R/W

0R

0R

*3

*3

*3

*3

0R/W

0R/W

0R/W

0R/W

27

Address

(decimal)

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

63

*1 This value is set when the high-speed counter module is powered on or the CPU module is reset.
*2 Whether a value can be read from/written to a program or not is indicated.

*3 Read or write values in 32-bit signed binary. (Be sure to use two words at a time.)

Address

(hexadecimal)

28

29

2A

2B

2C

2D

2E

2F

30

31

32

33

34

35

36

37

38

3F

R: Readable
W: Writable

Name

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

CH2 Overflow detection 0 R

CH2 Counter function selection 0 R/W

CH2 Sampling/periodic time setting 0 R/W

CH2 Sampling/periodic counter flag 0 R

CH2 Latch count value (L)

CH2 Latch count value (H)

CH2 Sampling count value (L)

CH2 Sampling count value (H)

CH2 Periodic pulse count previous value (L)

CH2 Periodic pulse count previous value (H)

CH2 Periodic pulse count present value (L)

CH2 Periodic pulse count present value (H)

CH2 Ring counter lower limit (L)

CH2 Ring counter lower limit (H)

CH2 Ring counter upper limit (L)

CH2 Ring counter upper limit (H)

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

*3

Initial value

*1

Read/write

0R

0R

0R

0R

0R

0R

0R

0R

0R/W

0R/W

0R/W

0R/W

*2

System area to to

H

● The system areas listed above and the areas not listed above are used by the system and are not available for users. If
data are written by a user, the performance of the high-speed counter module is not guaranteed.

● Buffer memory data in the high-speed counter module are initialized when the high-speed counter module is powered on
or the CPU module is reset. To save the necessary data, read/write the data by executing the FROM/DFRO/TO/DTO
instructions in the program or performing auto refresh to the device data.

28

CHAPTER 4 PROCEDURES BEFORE OPERATION

Start

Module installation

Connect the high-speed counter module.

Wiring

Connect an external device to the high-speed counter module.

Add the model name of the high-speed counter module.

Adding the model name of the intelligent function module

Switch setting

Set a pulse input mode, counting speed, and counter type.

Set an output mode if a CPU stop error occurs and CPU module
operation mode if a high-speed counter module error is detected.

Intelligent function module detailed setting

NO

YES

Use intelligent function module parameters?

Configure the parameter and auto refresh settings.

Parameter setting and auto refresh setting

Programming and debugging

Create and check a program.

CHAPTER 4 PROCEDURES BEFORE OPERATION

This chapter lists the procedures before operation.

( Page 31, Section 5.1)

( Page 35, Section 6.2, Page 47, Section 6.3, Page 49,
Section 6.4)

( Page 53, Section 7.1)

4

( Page 54, Section 7.2)

( Page 55, Section 7.3)

( Page 56, Section 7.4, Page 57, Section 7.5)

( Page 88, CHAPTER 10)

29

Memo

30

CHAPTER 5 SYSTEM CONFIGURATION

Power supply module CPU module

Display unit

(optional)

END cover

Connector

High-speed counter module

CHAPTER 5 SYSTEM CONFIGURATION

This chapter describes the overall configuration, number of connectable modules, and compatible software versions of

the high-speed counter module.

5.1 Overall Configuration

The following figures show examples of system configuration using the high-speed counter module.

(1) When connected to the CPU module

5

5.1 Overall Configuration

31

(2) When connected to the head module

Power supply module END cover

Connector

Head module High-speed counter module

32

CHAPTER 5 SYSTEM CONFIGURATION

5.2 Applicable System

(1) Number of connectable modules

For the number of connectable modules, refer to the following.

MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

MELSEC-L CC-Link IE Field Network Head Module User's Manual

(2) Compatible software versions

For compatible software versions, refer to the following.

MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

MELSEC-L CC-Link IE Field Network Head Module User's Manual

5.2.1 Restrictions when the high-speed counter module is

connected to the head module

5

The restrictions are as follows:

• The coincidence detection interrupt function cannot be used.

• Due to the link scan time, a delay occurs. This delay causes variations if the processing is carried out with

counter values that are input using a program. Thoroughly examine the system to make sure that it will not

cause controllability problem.

5.2.1 Restrictions when the high-speed counter module is connected to the head module

5.2 Applicable System

33

CHAPTER 6 INSTALLATION AND WIRING

This chapter describes installation and wiring of the high-speed counter module.

6.1 Installation Environment and Installation Position

For precautions for installation environment and installation position, refer to the following.

MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

MELSEC-L CC-Link IE Field Network Head Module User's Manual

34

CHAPTER 6 INSTALLATION AND WIRING

6.2 Wiring

This section describes wiring of encoders and controllers to the high-speed counter module.

6.2.1 Wiring precautions

To obtain the maximum performance from the functions of the high-speed counter module and improve the system

reliability, an external wiring with high durability against noise is required.

Here are some precautions when wiring encoders and controllers.

(1) Wiring

• Different terminals are prepared depending on the voltage of the signal to be input. Connecting to a terminal

with a different voltage may cause malfunction of the module or failure of the connected devices.

• In 1-phase input, always connect a pulse input cable on the A-phase side.

• Install a fuse for each external terminal to prevent the external devices or module from being burnt out or

damaged if a load shorts in an output circuit. The following fuses have been tested by Mitsubishi.

Fuse model name Rated current Contact

312.750 0.75A

216.800 0.8A

Littlefuse KK

www.littelfuse.com

6

(2) Connectors for external devices

• Connectors for external devices must be soldered or crimped properly. A poor soldering or crimping may

result in malfunction.

• Securely connect the connectors for external devices to the connectors of the high-speed counter module,

and securely tighten the two screws.

• When removing a cable from the high-speed counter module, do not pull the cable by the cable part.

Remove a cable supporting the connector part of the cable by hand. Pulling the cable being connected to the

high-speed counter module can cause malfunction. In addition, a damage of the high-speed counter module

or cables can result.

6.2.1 Wiring precautions

6.2 Wiring

35

(3) Measures against noise

Measure 1

Measure 2

Use shielded twisted pair cables.

Use the shortest possible shielded twisted pair cables, placing them not parallel with
noise-generating power cables or I/O cables and at a distance of 150mm or more.

Measure3

Ground the shield cable on the encoder side (relay box). Always ground the FG and LG terminals
to the protective ground conductor.

To A
To B

To the high-speed
counter module

Current for encoder

A

B

24V
E

+24V

0V

E

To the encoder

Connect the shielded cable of the encoder to the shielded
cable of the shielded twisted pair cable in the relay box.
If the shielded wire of the encoder is not grounded,
ground it to the relay box as shown by the dotted lines.

• The high-speed counter module may count pulses incorrectly if pulse-like noise is input.

• For the input of high-speed pulses, take the following measures against noise:

• The following figure shows a wiring example for noise reduction.

High-speed counter module

Inverter

Programmable
controller

Install I/O cables at least
150mm away from
high voltage equipment
such as a relay or
inverter.
(Pay attention to wiring in
the control panel as well.)

Terminal
block

AC motor

Terminal
block

Avoid using a solenoid valve or inductive load together with the cable in a metallic pipe.
If a sufficient distance from the power line cannot be ensured due to duct wiring,

use shielded cables such as CVVS for the power line.

Relay box

Provide the shortest possible distance between the encoder and
relay box.

If the distance from the high-speed counter to the encoder is long,

Cart

Encoder

a voltage drop may occur. Using a measuring instrument such as
a tester on the terminal block of the relay box, check if the voltages
in the encoder operation and stop status are within the rated
voltage range. If a voltage drop is too large, increase the cable size
or use a 24VDC encoder that will consume less current.

• Ground the shielded twisted pair cable on the encoder side (relay box). (Shown here is an example of

wiring to an open collector output type encoder (24VDC).)

36

CHAPTER 6 INSTALLATION AND WIRING

(4) Requirements for compliance with the EMC and Low Voltage Directives

Take the following measures for compliance with the EMC and Low Voltage Directives.

• Install a DC power inside the control panel.

• Use a shielded cable for the DC power when the cable is extended out of the control panel.

• Keep the length of the cables between the high-speed counter module and the external devices to 30m or

less.

• Use a shielded twisted pair cable and ground the shielded part of the cable to the control panel with the

AD75CK-type cable clamping (Mitsubishi).

Inside of control panel

counter module

High-speed

20 to 30cm

AD75CK

For details on the AD75CK, refer to the following.

AD75CK-type Cable Clamping Instruction Manual

6

6.2.1 Wiring precautions

6.2 Wiring

37

• Take the following noise reduction measures when wiring a connector for external devices.

Take off the jacket of each shield and connect
the shields of the cables with conductive tapes.

Cover the wires with
an insulating tape.

Take a shield out from any of the shielded cables,
and solder it to the FG wire.

Coat the connector pins with heatshrinkable insulation
tubes to protect signal lines.
(Exposure of signal lines may cause malfunction
due to static electricity.)

Cover the wires and conductive tape
with a heatshrinkable tube.

[Example of wiring using a shielded cable]

The following figure shows an example of wiring for noise reduction using the A6CON1.

Connector
(A6CON1)

From the controller

Shielded
cable

From the encoder

To the external device

To the high-speed counter module

[Example of noise reduction measures taken to shielded cables]

Assembling the A6CON1

The length between the connector
and shielded cables should be the
shortest possible.

2

Ground the shortest possible FG wire of 2mm

or more.
(Ground it to the panel on the high-speed counter module
side.)

38

6.2.2 Connectors for external devices

(1) Precautions

• Tighten the connector screws within the specified torque range.

Screw Tightening torque range

Connector screw (M2.6) 0.20 to 0.29Nm

• Use copper wires having temperature rating of 75 or more for the connectors.

• Use UL listed connectors if necessary for UL compliance.

(2) Applicable connectors

Connectors for external devices that are applicable to the high-speed counter module need to be obtained by a

user.

The following tables list the applicable connectors, and the reference product of a crimping tool.

CHAPTER 6 INSTALLATION AND WIRING

(a) 40-pin connectors

Type Model Applicable wire size

Soldering type connector

(straight out type)

Crimping type connector

(straight type)

Soldering type connector

(dual purpose (straight/oblique) type)

The A6CON3 (IDC type connector (straight type)) cannot be used.

A6CON1 0.3  (22 AWG) (Stranded)

A6CON2 0.088 to 0.24 (28 to 24 AWG) (stranded wire)

A6CON4 0.3  (22 AWG) (Stranded)

(b) 40-pin connector crimping tool

Type Model Contact

Crimping tool FCN-363T-T005/H

For how to wire the connector and how to use the crimping tool, contact the manufacturer.

FUJITSU COMPONENT LIMITED

www.fcl.fujitsu.com/en

6

6.2 Wiring

6.2.2 Connectors for external devices

39

(3) Wiring method

Connector screw

For wiring method, refer to the following.

MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

(4) Connection procedure

1. Plugging the connector

Plug the connector into the slot on the high-speed

counter module.

2. Tightening the connector screws

Tighten the two connector screws (M2.6).

40

(5) Removal procedure

1. Removing the connector

Loosen the two connector screws and pull out the

connector from the module.

CHAPTER 6 INSTALLATION AND WIRING

B20
B19
B18
B17
B16
B15
B14
B13
B12
B11
B10
B09
B08
B07
B06
B05
B04
B03
B02
B01

A20
A19
A18
A17
A16
A15
A14
A13
A12
A11
A10
A09
A08
A07
A06
A05
A04
A03
A02
A01

6.2.3 Interface with external devices

This section lists the interface of the high-speed counter module with external devices.

(1) Terminal layout and terminal numbers of the connector for external devices

The following figure shows the terminal layout and numbers on the connector for external devices.

6

6.2 Wiring

6.2.3 Interface with external devices

41

(2) LD62 (DC input sink output type)

6.8kΩ

A20,A13

B20,B13

A19,A12

B19,B12

A18,A11

B18,B11

A17,A10

1/3W

3.9kΩ
1/4W

330Ω
1/4W

6.8kΩ
1/3W

3.9kΩ
1/4W

330Ω
1/4W

10kΩ
1/3W

5.6kΩ
1/10W

2kΩ

1/8W

10kΩ
1/3W

5.6kΩ
1/10W

2kΩ

1/8W

1kΩ

1/10W

1kΩ

1/10W

B17,B10

A16,A09

B16,B09

A15,A08

B15,B08

A14,A07

B14,B07

I/O

classification

Internal circuit

Terminal

*1

number

Signal name Operation

CH1 CH2

A20 A13

B20 B13

Phase A pulse input

24V

Phase A pulse input

12V

A19 A12 Phase A pulse input 5V

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 4.5 to 5.5V 2 to 5mA

Off 2V or less 0.1mA or less

Input voltage

(guaranteed

value)

B19 B12 ABCOM 

Operating

current

(guaranteed

value)

Input

A18 A11

B18 B11

Phase B pulse input

24V

Phase B pulse input

12V

A17 A10 Phase B pulse input 5V

B17 B10 Preset input 24V

A16 A09 Preset input 12V

B16 B09 Preset input 5V

A15 A08 CTRLCOM

B15 B08 Function start input 24V

A14 A07 Function start input 12V

B14 B07 Function start input 5V

 

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 4.5 to 5.5V 2 to 5mA

Off 2V or less 0.1mA or less

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 4.5 to 5.5V 2 to 5mA

Off 2V or less 0.1mA or less

Response

time

Off to on

0.5ms or less

On to off

1ms or less

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 4.5 to 5.5V 2 to 5mA

Off 2V or less 0.1mA or less

Response

time

Off to on

0.5ms or less

On to off

1ms or less

42

CHAPTER 6 INSTALLATION AND WIRING

I/O

classification

Output

Terminal

*1

Internal circuit

A06,A05

B06,B05

B02,B01

A02,A01

*1 The terminals A03, A04, B03, and B04 are not assigned.
*2 Coincidence output derating (on ratio) is as follows.

number

CH1 CH2

A06 A05

B06 B05

B02, B01 12/24V • Input voltage: 10.2 to 30V

A02, A01 0V

100

90
80
70
60
50

ON ratio (%)

40
30

010 5550403020

Ambient temperature ( )

Signal name Operation

EQU1

(coincidence output

point No.1)

EQU2

(coincidence output

point No.2)

Input voltage

(guaranteed

value)

• Operating voltage: 10.2 to 30V

• Maximum load current: 0.5A/point,

2A/common

• Maximum voltage drop at on: 1.5V

• Response time

Off to on: 0.1ms or less

On to off: 0.1ms or less (rated load, resistive

load)

• Current consumption: 43mA

(TYP., 24VDC and all points on/common)

• Common to all channels

*2

Operating

current

(guaranteed

value)

6

6.2 Wiring

6.2.3 Interface with external devices

43

(3) LD62D (differential input sink output type)

+5V +5V

27kΩ

1/10W

4.7kΩ
1/10W

100Ω
1/2W

4.7kΩ

1/10W

27kΩ

1/10W

A20,A14

B20,B14

Line

receiver

Digital

isolator

+5V +5V

27kΩ

1/10W

4.7kΩ
1/10W

100Ω
1/2W

4.7kΩ

1/10W

27kΩ

1/10W

A19,A13

B19,B13

Line

receiver

Digital
isolator

1kΩ

1/10W

10kΩ
1/3W

5.6kΩ
1/10W

680Ω

1/10W

A16,A10

B16,B10

A15,A09

B15,B09

Terminal

I/O

classification

Internal circuit

CH1 CH2

number

*1

Signal name Operation

Input voltage

(guaranteed

value)

Operating

current

(guaranteed

value)

Input

1kΩ

1/10W

10kΩ
1/3W

5.6kΩ
1/10W

680Ω

1/10W

A18,A12

B18,B12

A17,A11

B17,B11

A20 A14 Phase A pulse input

B20 B14 Phase A

pulse input

A19 A13 Phase B pulse input

B19 B13 Phase B pulse input

A18 A12 Preset input 24V

B18 B12 Preset input 12V

A17 A11 Preset input 5V

B17 B11 PRSTCOM

A16 A10 Function start input 24V

B16 B10 Function start input 12V

A15 A09 Function start input 5V

B15 B09 FUNCCOM

EIA Standard RS-422-A Line receiver

(AM26C32 (manufactured by Texas

Instruments Incorporated) or equivalent)

The line receiver specifications are as follows:

• VIT + Differential input on voltage

(H level threshold voltage) 0.2V

• VIT - Differential input off voltage

(L level threshold voltage) - 0.2V

• Vhys hysteresis voltage (VIT +- VIT -) 60mV

(Current type line driver cannot be used.)

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 2.5 to 5.5V 2 to 5mA

Off 1V or less 0.1mA or less

Response

time

Off to on

0.5ms or less

On to off

1ms or less

On 21.6 to 26.4V 2 to 5mA

Off 5V or less 0.1mA or less

On 10.8 to 13.2V 2 to 5mA

Off 4V or less 0.1mA or less

On 2.5 to 5.5V 2 to 5mA

Off 1V or less 0.1mA or less

Response

time

Off to on

0.5ms or less

On to off

1ms or less

44

CHAPTER 6 INSTALLATION AND WIRING

A06,A05

B06,B05

B02,B01

A02,A01

I/O

classification

Output

Terminal

*1

Internal circuit

*1 The terminals A03, A04, A07, A08, B03, B04, B07, and B08 are not assigned.
*2 Coincidence output derating (on ratio) is as follows.

number

CH1 CH2

A06 A05

B06 B05

B02, B01 12/24V • Input voltage: 10.2 to 30V

A02, A01 0V

100

90
80
70
60
50

ON ratio (%)

40
30

010 5550403020

Ambient temperature ( )

Signal name Operation

EQU1

(coincidence output

point No.1)

EQU2

(coincidence output

point No.2)

• Operating voltage: 10.2 to 30V

• Maximum load current: 0.5A/point,

2A/common

• Maximum voltage drop at on: 1.5V

• Response time

Off to on: 0.1ms or less

On to off: 0.1ms or less (rated load, resistive

load)

• Current consumption: 43mA

(TYP., 24VDC and all points on/common)

• Common to all channels

Input voltage

(guaranteed

value)

*2

Operating

current

(guaranteed

value)

6

6.2 Wiring

6.2.3 Interface with external devices

45

6.2.4 Connectable encoders

Encoders that can be connected to the high-speed counter module are as follows.

(1) To the LD62

• Open collector output type encoder

• CMOS level voltage output type encoder

(Check that the encoder output voltage meets the specifications of the LD62.)

(2) To the LD62D

• Line driver output type encoder

(Check that the encoder output voltage meets the specifications of the LD62D.)

The following encoder cannot be used with the high-speed counter module.

● TTL level voltage output type encoder

46

CHAPTER 6 INSTALLATION AND WIRING

A20(A13)

24V

B20(B13)

12V

A19(A12)

5V

B19(B12)

ABCOM

Phase A

Shield

OUT

E

+24V

LD62

A18(A11)

24V

B18(B11)

12V

A17(A10)

5V

Phase B

Shield

OUT

E

+24V

0V

+24V

0V

24VDC

External power supply

Shielded twisted pair cable

Shielded twisted pair cable

Encoder

In parentheses, terminal numbers of channel 2 are shown.

24V

ABCOM

LD62

0V

24VDC

External
power supply

OUT

Encoder

+24V

0V

E

Shielded twisted pair cable

Shield

Phase A

24V

ABCOM

LD62

OUT

0V

24VDC

External
power supply

Encoder

+24V

0V

E

Shielded twisted pair cable

Shield

Phase A

Because currents flow in
the same direction in the
shielded twisted pair cable,
canceling effect will be lost
and electromagnetic
induction may occur.

6.3 Examples of Wiring Between the High-Speed Counter

Module and an Encoder

(1) Example of wiring with an open collector output type encoder (24VDC)

6

For the wiring between the RD62 and an encoder, separate the power supply cables and the signal cables. The following
figures show its examples:

● Example of correct wiring

● Example of inappropriate wiring

6.3 Examples of Wiring Between the High-Speed Counter Module and an Encoder

47

(2) Example of wiring with a voltage output type encoder (5VDC)

A20(A13)

24V

B20(B13)

12V

A19(A12)

5V

B19(B12)

ABCOM

Phase A

E

LD62

A18(A11)

24V

B18(B11)

12V

A17(A10)

5V

Phase B

0V

0V

External power supply

E

GND

OUT

+5V

5VDC

GND

OUT

Shielded twisted pair cable

Shielded twisted pair cable

Encoder

Shield

Shield

In parentheses, terminal numbers of channel 2 are shown.

(3) Example of wiring with a line driver (equivalent to AM26LS31) encoder

Encoder

A

A

E

B

B

E

VCCVCC

0V

Phase
A

Phase
B

Digital

isolator

Digital

isolator

LD62D

External power supply

A
A20(A14)

A
B20(B14)

B
A19(A13)

B
B19(B13)

0V

Shielded twisted pair cable

Shield

Shielded twisted pair cable

Shield

In parentheses, terminal numbers of channel 2 are shown.

48

CHAPTER 6 INSTALLATION AND WIRING

A18(A12)

24V

B18(B12)

12V

A17(A11)

5V

B17(B11)

PRSTCOM

Preset

Shield

OUT

E

+12V

ControllerLD62D

Shield

OUT

E

+12V

12VDC

A16(A10)

24V

B16(B10)

12V

A15(A09)

5V

B15(B09)

FUNCCOM

Function start

Shielded twisted pair cable

Shielded twisted pair cable

B17(B10)

24V

A16(A09)

12V

B16(B09)

5V

A15(A08)

CTRLCOM

Preset

Shield

OUT

E

+12V

ControllerLD62

Shield

OUT

E

+12V

12VDC

B15(B08)

24V

A14(A07)

12V

B14(B07)

5V

Function start

Shielded twisted pair cable

Shielded twisted pair cable

In parentheses, terminal numbers of channel 2 are shown.

In parentheses, terminal numbers of channel 2 are shown.

6.4 Examples of Wiring Between a Controller and External

Input Terminals

(1) When the controller (sync load type) has a voltage of 12VDC

6

6.4 Examples of Wiring Between a Controller and External Input Terminals

49

(2) When the controller (source load type) has a voltage of 5VDC

Preset

Function start

24V

B17(B10)

12V

A16(A09)

5V

B16(B09)

CTRLCOM

A15(A08)

24V

B15(B08)

12V

A14(A07)

5V

B14(B07)

ControllerLD62

Shielded twisted pair cable

OUT

GND

Shield

Shielded twisted pair cable

E

OUT

GND

Shield

E

In parentheses, terminal numbers of channel 2 are shown.

5VDC

Preset

Function start

24V

A18(A12)

12V

B18(B12)

5V
A17(A11)

PRSTCOM

B17(B11)

24V

A16(A10)

12V

B16(B10)

5V
A15(A09)

FUNCCOM

B15(B09)

ControllerLD62D

Shielded twisted pair cable

OUT

GND

Shield

Shielded twisted pair cable

E

OUT

GND

Shield

E

In parentheses, terminal numbers of channel 2 are shown.

5VDC

50

(3) When the controller is a line driver type

A18(A12)

24V

B18(B12)

12V

A17(A11)

5V

B17(B11)

PRSTCOM

Preset

Shield

OUT

E

Controller

A16(A10)

24V

B16(B10)

12V

A15(A09)

5V

B15(B09)

FUNCCOM

Function start

Shield

OUT

E

OUT

OUT

Shielded twisted pair cable

Shielded twisted pair cable

LD62D

In parentheses, terminal numbers of channel 2 are shown.

CHAPTER 6 INSTALLATION AND WIRING

6

6.4 Examples of Wiring Between a Controller and External Input Terminals

51

6.5 Examples of Wiring with External Output Terminals

Load

Load

A06(A05)

B06(B05)

A02, A01

B02, B01

EQU1

EQU2

0V

12/24V

10.2 to
30VDC

Fuse*

1

Fuse*

1

LD62, LD62D

In parentheses, terminal numbers of channel 2 are shown.

To use the coincidence output terminal (EQU), an external power supply of 10.2 to 30VDC is required to drive the

internal photocoupler. The following figure shows the wiring example:

(1) For the high-speed counter module (sink output type)

*1 Install a fuse for each external terminal to prevent the external devices or module from being burnt out or damaged if a

load shorts in an output circuit.

52

CHAPTER 7 SETTINGS

This chapter describes how to configure settings of the high-speed counter module.

● After writing the contents of the new module, parameter settings, and auto refresh settings into the CPU module, reset

the CPU module and switch its status as STOP  RUN  STOP  RUN, or turn off and on the power supply to activate
the settings.

● After writing the contents of the switch settings, reset the CPU module or turn off and on the power supply to activate the
settings.

7.1 Adding a Module

Add the model name of the high-speed counter module used for the project.

CHAPTER 7 SETTINGS

(1) How to add a module

Open "New Module".

Project window [Intelligent Function Module] Right-click [New Module...]

Item Description

Module Selection

Mount Position

Title Setting Title Enter a title.

Module Type Select "Counter Module".

Module Name Select the model name of the module to be connected.

Mounted Slot No. Select the number of the slot where the module is mounted.

Specify start XY

address

7

7.1 Adding a Module

The start I/O number (hexadecimal) of the module mounted on the slot set to

"Mounted Slot No." is displayed. This item can be set by user.

53

7.2 Switch Setting

Set a pulse input mode, counting speed, and counter type for each channel.

(1) Setting method

Open "Switch Setting".

Project window [Intelligent Function Module] Model name [Switch Setting]

Item Description Setting value

Pulse input mode Select a pulse input mode for each channel.

Select a counting speed for each channel.

Counting speed setting

Counter format Select a counter type for each channel.

500kpps can be selected for the LD62D

only.

• 1-Phase Multiple of 1 (default)

• 1-Phase Multiple of 2

• CW/CCW

• 2-Phase Multiple of 1

• 2-Phase Multiple of 2

• 2-Phase Multiple of 4

• 10kpps (default)

• 100kpps

• 200kpps

• 500kpps

• Linear Counter (default)

• Ring Counter

54

7.3 Intelligent Function Module Detailed Setting

Perform an output mode setting for an error and CPU module operation mode setting for a hardware error.

(1) Setting method

Open the "I/O Assignment" tab.

1. Open "I/O Assignment" of the PLC parameter.

Project window [Parameter] [PLC

Parameter] [I/O Assignment]

2. Click the button.

CHAPTER 7 SETTINGS



3. Select "Clear" or "Hold" for "Error Time Output

Mode".

4. Select "Stop" or "Continue" for "PLC Operation

Mode at H/W Error".

5. Click the button to complete the settings

of "Error Time Output Mode" and "PLC Operation

Mode at H/W Error".

Item Description Setting value Remarks

• Clear: If a CPU stop error occurs, all

external outputs of coincidence

Error Time Output

Mode

PLC Operation Mode

at H/W Error

Select whether to clear or hold module

output if a CPU stop error occurs.

• Select whether to stop or continue the

CPU module operation if a high-speed

counter module error (SP.UNIT DOWN)

is detected.

• The error (SP.UNIT DOWN) is detected

if the module READY flag is not in ready

due to module hardware failure.

• Clear (default)

•Hold

• Stop (default)

• Continue

signals turn off.

• Hold: If a CPU stop error occurs,

external outputs of coincidence

signals are held in the status before

the CPU module stops.

• Stop: If a high-speed counter module

error is detected, the CPU module

stops.

• Continue: Even if a high-speed

counter module error is detected, the

CPU module continues running a

program for modules other than the

faulty one.

7

7.3 Intelligent Function Module Detailed Setting

55

7.4 Parameter Settings

Item to be selected
from the pull-down list

Item to be input in a text box

Set parameters for each channel.

Setting parameters here eliminates the need to program them.

(1) Setting method

Open the "Parameter" window.

1. Open the "Parameter" window from the project window.

Project window [Intelligent Function Module] Model name [Parameter]

Basic setting

Counter function

2. Double-click the text box of the setting-target item and select or enter a value.

• Items to be set by selecting a value from a pull-down list

Double-click the text box and select an option from the displayed pull-down list.

• Items to be set by entering a value in a text box

Double-click the text box and enter a value.

3. When using CH2, perform the procedure 2.

Item Setting value Reference

Preset value -2147483648 to 2147483647 (default: 0) Page 73, Section 8.4

Coincidence output point

No.1

Coincidence output point

No.2

Ring counter upper limit -2147483648 to 2147483647 (default: 0)

Ring counter lower limit -2147483648 to 2147483647 (default: 0)

Counter function selection

Sampling/periodic time

setting

-2147483648 to 2147483647 (default: 0)

-2147483648 to 2147483647 (default: 0)

0: Count Disable Function (default)

1: Latch Counter Function

2: Sampling Counter Function

3: Periodic Pulse Counter Function

1 to 65535 (unit: 10ms) (default: 0)

Page 68, Section 8.3

Page 65, Section 8.2.2

Page 75, Section 8.5

56

7.5 Auto Refresh

The function of auto refresh is to transfer buffer memory data to a specified device.

This setting eliminates the need to read data with a program.

(1) Setting method

Open the "Auto_Refresh" window.

1. Open the "Auto_Refresh" window from the project window.

Project window [Intelligent Function Module] Model name [Auto_Refresh]

2. Click the text box of the setting-target item and enter the auto refresh target device.

CHAPTER 7 SETTINGS

7

7.5 Auto Refresh

57

CHAPTER 8 FUNCTIONS

This chapter describes the details of the functions that can be achieved through the high-speed counter module and

their setting methods.

For details on I/O signals and buffer memory, refer to the following.

• Details of I/O signals ( Page 112, Appendix 1)

• Details of Buffer Memory Areas ( Page 116, Appendix 2)

58

CHAPTER 8 FUNCTIONS

A

B or

CH Down

count command

(Y3, YB)

A

B or

CH Down

count command

(Y3, YB)

A

B

8.1 Pulse Input Modes and Counting Methods

This section describes the pulse input modes and the counting methods.

8.1.1 Types of pulse input modes

The following six pulse input modes are prepared: 1-phase pulse input (1 multiple/2 multiples), CW/CCW pulse input,

and 2-phase pulse input (1 multiple/2 multiples/4 multiples).

(1) Pulse input modes and count timing

Pulse input mode Count timing

1-phase multiple of 1

1-phase multiple of 2

At up count

At down count

At up count

At down count

B and

CH Down

count command

(Y3, YB)

B and

CH Down

count command

(Y3, YB)

A

A

Counts on the rising edge () of A.
B and CH Down count command (Y3, YB) are off.

Counts on the falling edge () of A.
B or CH Down count command (Y3, YB) is on.

Counts on the rising edge () and the falling edge ()
of A.
B and CH Down count command (Y3, YB) are off.

Counts on the rising edge () and the falling edge ()
of A.
B or CH Down count command (Y3, YB) is on.

8

8.1 Pulse Input Modes and Counting Methods

8.1.1 Types of pulse input modes

CW/CCW

2-phase multiple of 1

At up count

At down count

At up count Counts on the rising edge () of A while B is off.

At down count Counts on the falling edge () of A while B is off.

A

B

A

B

A

B

Counts on the rising edge () of A.
B is off.

A is off.

Counts on the rising edge () of B.

59

Pulse input mode Count timing

A

B

A

B

A

B

A

B

2-phase multiple of 2

2-phase multiple of 4

For the 1-phase pulse input, check that for up count, the phase B pulse input and CH Down count command (Y3, YB) are
off before performing the phase A pulse input.
If at least one of the B phase pulse input and CH Down count command (Y3, YB) is on, pulses are counted down in the A
phase pulse input.

At up count

At down count

At up count

At down count

Counts on the rising edge () of A while B is off.
Counts on the falling edge () of A while B is on.

Counts on the rising edge () of A while B is on.
Counts on the falling edge () of A while B is off.

Counts on the rising edge () of A while B is off.
Counts on the falling edge () of A while B is on.
Counts on the rising edge () of B while A is on.
Counts on the falling edge () of B while A is off.

Counts on the rising edge () of A while B is on.
Counts on the falling edge () of A while B is off.
Counts on the rising edge () of B while A is off.
Counts on the falling edge () of B while A is on.

60

CHAPTER 8 FUNCTIONS

Phase A pulse input

Phase B pulse input

A

B

Encoder

High-speed counter module

(a) 1-phase pulse input

The count method can be selected from 1 multiple and 2 multiples.

The following figure shows the relationship between phase A pulse input and phase B pulse input or CH

Down count command (Y3, YB).

High-speed counter module

Encoder

B or CH Down count command
(Y3, YB)

Pulse input

A

B

(b) CW/CCW pulse input

Pulses can be counted up with the A phase pulse input and counted down with the B phase pulse input.

The following figure shows the relationship between A phase pulse input and B phase pulse input.

High-speed counter module

Encoder

Encoder

Count-up pulse input

Count-down pulse input

A

B

(c) 2-phase pulse input

The count method can be selected from 1 multiple, 2 multiples, and 4 multiples.

The phase difference between the A phase pulse and B phase pulse determines whether the pulses are

counted up or down.

The following figure shows the relationship between A phase pulse input and B phase pulse input.

8

8.1 Pulse Input Modes and Counting Methods

8.1.1 Types of pulse input modes

61

8.1.2 Setting a counting method

Set a counting method by switch setting.

For details on the setting method, refer to the following.

• Switch Setting ( Page 54, Section 7.2)

8.1.3 Reading the present value

This section describes the details on the present value stored in the buffer memory and the count values selected from

the counter function selection, and their reading method.

(1) Storage location of the count value

The present value is always stored in CH Present value (Un\G2, Un\G3, Un\G34, Un\G35) regardless of the

counter function used.

When the latch counter, sampling counter, or periodic pulse counter function is performed, the count value is

stored in the corresponding buffer memory areas listed in the table below.

Counter function selection count value

Description Present value

Buffer memory address

CH1

CH2

Un\G2,

Un\G3

Un\G34,

Un\G35

Latch count

value

Un\G12,

Un\G13

Un\G44,

Un\G45

Sampling

count value

Un\G14,

Un\G15

Un\G46,

Un\G47

Periodic pulse

count

previous value

Un\G16,

Un\G17

Un\G48,

Un\G49

Periodic pulse

count current

value

Un\G18,

Un\G19

Un\G50,

Un\G51

(2) Stored data

The present value and the counter function selection count values are stored in the buffer memory areas in 32-bit

signed binary.

The buffer memory data is automatically updated by counting operation. The latest count value can be read from

the buffer memory.

Read the present value and counter function selection count values by two words at a time.
If the values are read by one word at a time, the lower word data and the higher word data will be inconsistent when the
count value is updated during reading, and an incorrect count value may be read.

● Program example

● Inappropriate program example

The present value may change while CH1 Present value (L) (Un\G2) and CH1 Present value (H) (Un\G3) are read.

62

8.2 Selecting Counter Type

Select a counting method in the switch setting.

(1) Setting method

1. Set "Counter format" to "Linear Counter" or "Ring Counter".

Project window [Intelligent Function Module] Model name [Switch Setting]

CHAPTER 8 FUNCTIONS

Linear counter

Ring Counter

Item Description Reference

Pulses are counted between -2147483648 (lower limit value) and

2147483647 (upper limit value).

Pulses are repeatedly counted between the values stored in CH

Ring counter lower limit (Un\G20, Un\G21, Un\G52, Un\G53) and

CH Ring counter upper limit (Un\G22, Un\G23, Un\G54, Un\G55).

Page 64, Section 8.2.1

Page 65, Section 8.2.2

8

8.2 Selecting Counter Type

63

8.2.1 Linear counter function

[phone]

-2147483648

Present counter value

Overflow

Overflow

Counting upCounting down

0

(1) Operation of the linear counter

• This function counts pulses between -2147483648 (lower limit value) and 2147483647 (upper limit value).

• The preset function and the coincidence output function can be used together.

(2) Overflow error

• In linear counter, an overflow error occurs if the present counter value falls below -2147483648 (lower limit

value) in counting down or exceeds 2147483647 (upper limit value) in counting up.

• If an overflow error occurs, "1" is stored in CH Overflow detection (Un\G8, Un\G40), the counting operation

stops, and the present value does not change from -2147483648 or 2147483647 even if pulses are input.

• An overflow error can be cleared by performing the preset function.

• When the preset function is performed, "0" is stored in CH Overflow detection (Un\G8, Un\G40) and the

counting operation can be restarted.

• Overflow error status can be checked in the system monitor window. ( Page 108, Section 11.1 (1))

64

8.2.2 Ring counter function

(1) Operation of the ring counter

This function repeatedly counts pulses between the values stored in CH Ring counter lower limit (Un\G20,

Un\G21, Un\G52, Un\G53) and CH Ring counter upper limit (Un\G22, Un\G23, Un\G54, Un\G55).

In ring counter, an overflow error does not occur.

The preset function and the coincidence output function can be used together.

Present counter value

[phone]

CH

0

Counting down

Counting up

CH

-2147483648

CHAPTER 8 FUNCTIONS

Ring counter upper limit (Un\G22, Un\G23, Un\G54, Un\G55)

Ring counter lower limit (Un\G20, Un\G21, Un\G52, Un\G53)

8.2.2 Ring counter function

8

8.2 Selecting Counter Type

65

(2) Count range of the ring counter

-2147483648

Ring counter

lower limit value

Present value

Ring counter

upper limit value

0

500

2000

2147483647

Ring counter

lower limit value

(2000)

Present value

500 501 1998 1999to 0 1 2 to 498 499

Counting range

Ring counter

upper limit value

The ring counter upper limit value,
2000, is not stored in CH Present
value (Un\G2, Un\G3, Un\G34,
Un\G35).

The count range is determined by the relationship between CH Present value (Un\G2, Un\G3, Un\G34,

Un\G35) and the ring counter lower limit/upper limit values when CH Count enable command (Y4, YC) is turned

on or when the preset function is performed.
Normally, the count range is "Ring counter lower limit value  Present value  Ring counter upper limit value".

(a) When the count range is Ring counter lower limit value  Present value  Ring

counter upper limit value (normally used)

• For up count

When the present value reaches the ring counter upper limit value, the ring counter lower limit value is

automatically stored in CH Present value (Un\G2, Un\G3, Un\G34, Un\G35).

• For down count

Even when the present value reaches the ring counter lower limit value, the ring counter lower limit value

is held as the lower limit, and "Ring counter upper limit value - 1" is stored in CH Present value (Un\G2,

Un\G3, Un\G34, Un\G35) at the next count-down pulse input.

Both in up count and in down count, the ring counter upper limit value is not stored in CH Present value

(Un\G2, Un\G3, Un\G34, Un\G35).

For example, when the count enable command is valid while the ring counter lower limit value is 0, the ring

counter upper limit value is 2000, and the present value is 500, the count range and the present value will

change as follows.

66

CHAPTER 8 FUNCTIONS

(b) When the count range is "Present value < Ring counter lower limit value or ring

counter upper limit value < Present value"

• For up count

Even when the present value reaches the ring counter lower limit value, the ring counter lower limit value

is held as the lower limit, and "Ring counter upper limit value + 1" is stored in CH Present value (Un\G2,

Un\G3, Un\G34, Un\G35) at the next count-up pulse input.

• For down count

When the present value reaches the ring counter upper limit value, the ring counter lower limit value is

automatically stored in CH Present value (Un\G2, Un\G3, Un\G34, Un\G35).

Both in up count and in down count, the ring counter upper limit value is not stored in CH Present value

(Un\G2, Un\G3, Un\G34, Un\G35).

For example, when the count enable command is valid while the ring counter lower limit value is 0, the ring

counter upper limit value is 2000, and the present value is 3000, the count range and the present value will

change as follows.

Ring counter

lower limit value

0

-2147483648

Counting range

Ring counter

Present value

3000 3001 2001to -2 -1 0 to2002 2998

2147483647 -2147483648

upper limit value

to 2999

Ring counter

upper limit value

2000

Counting range

lower limit value

(2000)

The ring counter upper limit value,
2000, is not stored in CH
Present value (Un\G2, Un\G3,
Un\G34, Un\G35).

Present value

3000

2147483647

Ring counter

(c) When the count range is "Ring counter lower limit value = Ring counter upper limit

value"

When this condition is established, the count range will be the full range (-2147483648 to 2147483647) which

can be expressed in 32-bit signed binary regardless of the present value.

8.2.2 Ring counter function

8

8.2 Selecting Counter Type

● While CH Count enable command (Y4, YC) is on, even if a value is written to CH Ring counter lower limit (Un\G20,
Un\G21, Un\G52, Un\G53) or CH Ring counter upper limit (Un\G22, Un\G23, Un\G54, Un\G55), the stored value does
not change.
Turn off CH  Count enable command (Y4, YC) before changing the ring counter upper/lower limit value.

● Turn off CH Count enable command (Y4, YC) before changing the count range by the preset function.

67

8.3 Coincidence Output Function

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

1) 100

2)

3)

4)

1031021011009998to210

Counter input pulse

CH Count enable command
(Y4, YC)

CH Coincidence signal enable
command (Y2, YA)

CH Coincidence output point No.1
(Un\G4, Un\G5, Un\G36, Un\37)

CH Counter value small
(point No.1) (X3, XA)

CH Counter value coincidence
(point No.1) (X2, X9)

CH Coincidence signal No.1 reset
command (Y0, Y8)

CH Counter value large (point No.1)
(X1, X8)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\35)

This function compares the present counter value with the preset coincidence output point setting value and outputs a

signal when they match.

Up to two coincidence outputs can be set for each channel.

When using external output of the coincidence signal, turn on CH Coincidence signal enable command (Y2, YA)

beforehand.

(1) Operation of the coincidence output

The I/O numbers (X/Y) and the buffer memory addresses in (1) are for coincidence output point No.1.

For those of coincidence output point No.2, refer to the following.

• List of I/O Signals (Page 26, Section 3.4)

• List of Buffer Memory Areas (Page 27, Section 3.5)

No. Description

1)

2)

3)

4)

Write a coincidence output point setting value to CH Coincidence output point No.1 (Un\G4, Un\G5, Un\G36,

Un\G37) of the high-speed counter module in 32-bit signed binary.

When the count value matches with the coincidence output point setting value, CH Counter value small (point

No.1) (X3, XA) turns off and CH Counter value coincidence (point No.1) (X2, X9) turns on.

Turn on CH Coincidence signal No.1 reset command (Y0, Y8) to reset CH Counter value coincidence (point

No.1) (X2, X9).

If CH Counter value coincidence (point No.1) (X2, X9) remains on, the next coincidence signal cannot be output.

When the counter value exceeds the coincidence output point setting value, CH Counter value large (point No.1)

(X1, X8) turns on.

68

Perform the following before turning on CH Coincidence signal enable command (Y2, YA).

● Set different values between CH Coincidence output point No.1 (Un\G4, Un\G5, Un\G36, Un\G37) and CH Present
value (Un\G2, Un\G3, Un\G34, Un\G35) by any of the following ways:

• Changing the coincidence output point setting

• Changing the present value using the preset function

• Changing the present value by inputting a pulse

● Turn off, on, and then off CH Coincidence signal No.1 reset command (Y0, Y8).
When CH Coincidence signal enable command (Y2, YA) is turned on before counting operation or while the
coincidence output point setting value matches with the present value, coincidence output is performed.

● CH Counter value coincidence (point No.1) (X2, X9) is on immediately after the CPU module is powered on or is reset
because both CH Present value (Un\G2, Un\G3, Un\G34, Un\G35) and CH Coincidence output point No.1 (Un\G4,
Un\G5, Un\G36, Un\G37) are set to "0".

(2) Setting method

Set values for "Coincidence output point No.1" and "Coincidence output point No.2".

Project window [Intelligent Function Module] Model name [Parameter]

CHAPTER 8 FUNCTIONS

Item Setting range

Coincidence output point No.1

Coincidence output point No.2

-2147483648 to 2147483647

(3) Output status setting at a CPU stop error

If a CPU stop error occurs, the output status (clear/hold) of external output signals can be set.

The output status setting can be set in the intelligent function module detailed setting.

(a) Setting method

Set "Clear" or "Hold" for "Error Time Output Mode".

Project window [Parameter] [PLC Parameter] [I/O Assignment]

button

8

8.3 Coincidence Output Function

69

(4) Coincidence detection interrupt function

Interrupt program execution timing

I/O signals

Interrupt request

Interrupt request clear

Interrupt program

Internal

processing

of

CPU module

CH Counter value coincidence (point No.1) (X2, X9)
CH Counter value coincidence (point No.2) (X6, XD)

CH Coincidence signal No.1 reset command (Y0, Y8)
CH Coincidence signal No.2 reset command (Y7, YF)

Program in CPU module

This function outputs an interrupt request to the CPU module and starts an interrupt program when the present

counter value matches with the preset coincidence output point setting value.

(a) Interrupt factors (SI)

One intelligent function module can have interrupt factors (SI) up to 16 points.

The high-speed counter module has interrupt factors of 4 points for each coincidence output point as shown

below.

SI No. Interrupt factor

0

1

2

3

4 to 15 Reserved

Channel 1: Coincidence detection of coincidence output

point No.1

Channel 1: Coincidence detection of coincidence output

point No.2

Channel 2: Coincidence detection of coincidence output

point No.1

Channel 2: Coincidence detection of coincidence output

point No.2

70

CHAPTER 8 FUNCTIONS

(b) Setting interrupt pointers

Assign interrupt factors (SI) and the interrupt pointers of the CPU module in "Intelligent Function Module

Interrupt Pointer Setting" of "PLC Parameter".

Project window [Parameter] [PLC Parameter] [PLC System]

[Intelligent Function Module Setting] button

PLC Side

Intelligent Module Side

Ex.

Assigning SI0 to SI3 of the high-speed counter module, whose start I/O number has been set to 20, to the

interrupt pointers I50 to I53

Item Description Setting range

Interrupt Pointer Start No.

Interrupt Pointer Count Enter the number of interrupt factors (SI). 1 to 4

Start I/O No.

Start SI No.

Enter the start number of the interrupt pointer of the

CPU module.

Enter the start I/O number of the high-speed counter

module.

Enter the start number of the interrupt factor (SI) of

the high-speed counter module.

50 to 255

0000

to 0FF0

H

0 to 3

H

8

8.3 Coincidence Output Function

71

(c) Using only a specific SI No.

• Setting in the intelligent function module interrupt pointer setting in the parameters

Interrupt factors are used starting from the start SI No. by the number of interrupt pointers set in the

"Intelligent Function Module Interrupt Pointer Setting" dialog box.

For example, when "1" is set for "Start SI No." and "2" is set for "Interrupt Pointer Count", only SI1 and SI2

are used.

When these settings are not configured, the interrupt function will not be used.

• Using the IMASK instruction

Using the IMASK instruction allows enabling or disabling interrupt program execution (interrupt mask) for

each interrupt pointer.

For details on the IMASK instruction, refer to the following.

MELSEC-Q/L Programming Manual (Common Instruction)

A coincidence detection interrupt occurs on the rising edge of the counter value coincidence signal (off to on).
Therefore, the next interrupt will not be requested unless the coincidence signal is reset and the counter value coincidence
signal is turned off.

72

8.4 Preset Function

This function overwrites the present counter value with the set value.

The set value is referred to as a preset value.

This function can be used to start counting pulses from the preset value.

The function can be performed using a program or an external control signal.

(1) Performing the preset function using a program

Perform the preset function by turning on CH Preset command (Y1, Y9).

CHAPTER 8 FUNCTIONS

CH Count enable command
(Y4, YC)

Counter input pulse

CH Preset value
(Un\G0, Un\G1, Un\G32, Un\G33)

CH Preset command
(Y1, Y9)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

ON

OFF

ON

OFF

1)

1000

2)

to

101100676665210

102 103 104 105

No. Description

1) Write a value to CH Preset value (Un\G0, Un\G1, Un\G32, Un\G33) in 32-bit signed binary.

On the rising edge (off to on) of CH Preset command (Y1, Y9), the value stored in CH Present value (Un\G2,

2)

Un\G3, Un\G34, Un\G35) is replaced with the value stored in CH Preset value (Un\G0, Un\G1, Un\G32, Un\G33).

The preset function is performed regardless of the on/off status of CH Count enable command (Y4, YC).

8

8.4 Preset Function

73

(2) Performing the preset function using an external control signal

Perform the preset function by applying an ON voltage to the preset input terminal for external input.

CH Count enable command
(Y4, YC)

Counter input pulse

CH Preset value
(Un\G0, Un\G1, Un\G32, Un\G33)

Preset command
(preset input terminal)

CH External preset
request detection
(X4, XB)

CH External preset
detection reset command
(Y5, YD)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

ON

OFF

ON

OFF

ON

OFF

ON

OFF

1)

0

0

100

2)

3)

toto

101666521

2)

4)

123 124 100 10110067

No. Description

1) Write a value to CH Preset value (Un\G0, Un\G1, Un\G32, Un\G33) in 32-bit signed binary.

On the rising edge (off to on) of the preset command (A voltage is applied to the preset input terminal.), the value

stored in CH Present value (Un\G2, Un\G3, Un\G34, Un\G35) is replaced with the value stored in CH Preset

2)
value (Un\G0, Un\G1, Un\G32, Un\G33).

The preset function is performed regardless of the on/off status of CH Count enable command (Y4, YC).

While CH External preset request detection (X4, XB) is on (3)), the preset function cannot be performed even if a voltage
is applied to the preset input terminal or CH Preset command (Y1, Y9) is turned on.
The preset function can be performed when CH External preset request detection (X4, XB) is turned off by turning on CH
External preset detection reset command (Y5, YD) (4)).

74

CHAPTER 8 FUNCTIONS

Ex.

8.5 Counter Function Selection

The count disable function, the latch counter function, the sampling counter function, or the periodic pulse counter

function can be used by selecting each item in "Counter function selection". The selected counter function is performed

by the counter function selection start command (A voltage is applied to the function start input terminal or CH

Counter function selection start command (Y6, YE) is turned on by a program).

The counter function selection permits using only one function of the four counter functions.

(1) Setting method

Select a counter function in "Counter function selection".

Project window [Intelligent Function Module] Model name [Parameter]

Item Description Reference

Count Disabling Function Stops counting while CH Count enable command (Y4, YC) is on. Page 78, Section 8.6

Latch Counter Function Latches the present counter value when a signal is input. Page 79, Section 8.7

Sampling Counter Function Counts pulses input during the specified sampling period (T). Page 80, Section 8.8

Stores the present and previous counter values to CH Periodic

Periodic Pulse Counter Function

pulse count present value (Un\G18, Un\G19, Un\G50, Un\G51) and

CH Periodic pulse count previous value (Un\G16, Un\G17,

Un\G48, Un\G49), respectively, at the preset cycle (T).

Page 81, Section 8.9

8

● When changing the counter function, change the function with the off state of CH Counter function selection start
command (Y6, YE).

● The selected counter function can be performed by turning on CH Counter function selection start command (Y6, YE)
or applying a voltage to the function start input terminal. A signal that is input first takes priority.

● Time for the sampling counter function or the periodic pulse counter function can be set by writing a value of 1 to 65535
to CH Sampling/periodic time setting (Un\G10, Un\G42). The unit of time is 10ms.

Setting "420" for CH Sampling/periodic time setting (Un\G10, Un\G42)

420 10 = 4200(ms)

8.5 Counter Function Selection

75

8.5.1 Reading the counter function selection count value

The counter function selection count value refers to the count value that is stored when the counter function selection

is performed.

When the latch counter, sampling counter, or periodic pulse counter function is performed, the count value is stored in

the corresponding buffer memory areas listed in the table below.

Counter function selection count value

Description Present value

Buffer memory address

CH1

CH2

Un\G2,

Un\G3

Un\G34,

Un\G35

Latch count

value

Un\G12,

Un\G13

Un\G44,

Un\G45

Sampling

count value

Un\G14,

Un\G15

Un\G46,

Un\G47

Periodic pulse

count

previous value

Un\G16,

Un\G17

Un\G48,

Un\G49

The present value and the counter function selection count values are stored in the buffer memory areas in 32-bit

signed binary.

The buffer memory data is automatically updated by counting operation. The latest count value can be read from the

buffer memory.

Periodic pulse

Un\G18,

Un\G19

Un\G50,

Un\G51

count current

value

● Read the present value and counter function selection count values by two words at a time. If the values are read by one
word at a time, the lower word data and the higher word data will be inconsistent when the count value is updated during
reading, and an incorrect count value may be read.

• Program example

• Inappropriate program example
The present value may change while CH1 Present value (L) (Un\G2) and CH1 Present value (H) (Un\G3) are
read.

● Although the storage addresses differ between the latch count value and periodic pulse count current value, the stored
values are always the same (updated simultaneously). Therefore, when the latch counter function or periodic pulse
counter function is executed, the latch count value and periodic pulse count current value do not hold their previous
values.

76

CHAPTER 8 FUNCTIONS

1 [ms]

1000

[s] Pulse input speed [PPS] Multiplication [count]

1 scan time [ms]

1000

[s] Pulse input speed [PPS] Multiplication [count]

8.5.2 Count error

A count error may occur when the selected counter function is performed by external input (A voltage is applied to the

function start input terminal.) or by a program (CH Counter function selection start command (Y6, YE) is turned on).

The following describes how to calculate the count error.

(1) Count error (maximum) due to a delay of response to an external input

(2) Count error (maximum) when the selected counter function is performed by a

program

(3) Count error (maximum) due to an internal clock delay when the sampling

counter function or the periodic pulse counter function is performed

Sampling/periodic time setting value 10 [ms]

1000

Pulse input speed [PPS] Multiplication [count]

(Sampling/periodic time setting value

(unit: 10ms))

=

[s]

Pulse input speed [PPS] Multiplication [count]

1000000

Error in design, 100 [ppm]

1000000

8

8.5.2 Count error

8.5 Counter Function Selection

77

8.6 Count Disable Function

0

ON

OFF

2) 7)3)

ON

OFF

1) 8)6)

9)

ON

OFF

4) 5)

CH Count enable command
(Y4, YC)

CH Counter function selection
start command (Y6, YE)

Counter function selection start
command (function start input)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

Count stop

Count

stop

Count

stop

Count

stop

Count value stored in
CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

Pulses actually input

This function stops counting pulses while CH Count enable command (Y4, YC) is on.

The following figure shows the relationship among CH Count enable command (Y4, YC), the counter function

selection start command, and the present counter value.

78

No. Description

1) Counting starts when CH Count enable command (Y4, YC) is turned on.

2) Counting stops when CH Counter function selection start command (Y6, YE) is turned on.

3) Counting restarts when CH Counter function selection start command (Y6, YE) is turned off.

4) Counting stops when the counter function selection start command (function start input) is turned on.

5) Counting restarts when the counter function selection start command (function start input) is turned off.

6) Counting stops when CH Count enable command (Y4, YC) is turned off.

Counting stops regardless of the on/off status of CH Counter function selection start command (Y6, YE) because

7)
CH Count enable command (Y4, YC) is off.

Even though CH Count enable command (Y4, YC) is turned on, counting remains stopped because CH Counter

8)
function selection start command (Y6, YE) is on.

9) Counting restarts when CH Counter function selection start command (Y6, YE) is turned off.

CHAPTER 8 FUNCTIONS

1) 2) 3) 4)

0

50

100

150

ON

OFF

ON

OFF

0

50

100

130

0

50

100

150

0

50

100

130

CH Count enable command
(Y4, YC)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

CH Counter function selection start
command (Y6, YE)
Counter function selection start command
(function start input)

CH Latch count value
(Un\G12, Un\G13, Un\G44, Un\G45)

8.7 Latch Counter Function

The function latches the present counter value when a signal is input.

The following figure shows the relationship among the present counter value, the counter function selection start

command, and CH Latch count value (Un\G12, Un\G13, Un\G44, Un\G45).

On the rising edge of CH Counter function selection start command (Y6, YE) or the counter function selection start

command (function start input) of 1) to 4), the present counter value is stored in CH Latch count value (Un\G12,

Un\G13, Un\G44, Un\G45).

The latch counter function is performed regardless the on/off status of CH Count enable command (Y4, YC).

8

8.7 Latch Counter Function

79

8.8 Sampling Counter Function

This function counts pulses input during the specified sampling period (T).

The following figure shows the relationship between the signals and the buffer memory areas.

CH Count enable command
(Y4, YC)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

ON

OFF

200

100

0

5)

CH Counter function selection start
command (Y6, YE)
Counter function selection start command
(function start input)

CH Sampling count value
(Un\G14, Un\G15, Un\G46, Un\G47)

CH Sampling/periodic counter flag
(Un\G11, Un\G43)

ON

OFF

200

100

0

-100

1
0

1)

TTT

2)3)4)

No. Description

Input pulses are counted from 0 on the rising edge of CH Counter function selection start command (Y6, YE) or the

1)
counter function selection start command (function start input).

2) Counting stops when the specified sampling period has elapsed.

While the sampling counter function is performed, "1" is stored in CH Sampling/periodic counter flag (Un\G11,

3)
Un\G43).

Even after the sampling counter function is performed, the value stored in CH Sampling count value (Un\G14,

4)
Un\G15, Un\G46, Un\G47) is held.

5) The sampling counter function is performed regardless the on/off status of CH Count enable command (Y4, YC).

80

CHAPTER 8 FUNCTIONS

0

100

200

ON

OFF

ON

OFF

0

100

200

1)
0

2)

200

3)
20

4)

100

5)
80

6)

TTTTT

1)
0

2)

200

3)
20

4)

100

5)
80

0

100

200

2)
0

3)

200

4)
20

5)

100

1

0

7)

CH Count enable command
(Y4, YC)

CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)

CH Counter function selection start
command (Y6, YE)
Counter function selection start command
(function start input)

CH Periodic pulse count, present value
(Un\G18, Un\G19, Un\G50, Un\G51)

CH Periodic pulse count, previous value
(Un\G16, Un\G17, Un\G48, Un\G49)

CH Sampling/periodic counter flag
(Un\G11, Un\G43)

8.9 Periodic Pulse Counter Function

This function stores the present and previous counter values to CH Periodic pulse count present value (Un\G18,

Un\G19, Un\G50, Un\G51) and CH Periodic pulse count previous value (Un\G16, Un\G17, Un\G48, Un\G49),

respectively, at the preset cycle (T).

The following figure shows the relationship between the signals and the buffer memory areas.

8

8.9 Periodic Pulse Counter Function

81

No. Description

Ex.

The present counter value, 0, is stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

1)
Un\G51).

The present counter value, 200, is stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51).

2)
The value 0, which has been stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51), is then stored in CH Periodic pulse count, previous value (Un\G16, Un\G17, Un\G48, Un\G49).

The present counter value, 20, is stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51).

3)
The value 200, which has been stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51), is then stored in CH Periodic pulse count, previous value (Un\G16, Un\G17, Un\G48, Un\G49).

The present counter value, 100, is stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51).

4)
The value 20, which has been stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51), is then stored in CH Periodic pulse count, previous value (Un\G16, Un\G17, Un\G48, Un\G49).

The present counter value, 80, is stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51).

5)
The value 100, which has been stored in CH Periodic pulse count, present value (Un\G18, Un\G19, Un\G50,

Un\G51), is then stored in CH Periodic pulse count, previous value (Un\G16, Un\G17, Un\G48, Un\G49).

The periodic pulse counter function is performed regardless the on/off status of CH Count enable command (Y4,

6)
YC).

While the periodic pulse counter function is performed, "1" is stored in CH Sampling/periodic counter flag (Un\G11,

7)
Un\G43).

Read CH Periodic pulse count, previous value (Un\G16, Un\G17, Un\G48, Un\G49) and CH Periodic pulse count,
present value (Un\G18, Un\G19, Un\G50, Un\G51) by two words at a time.

Program example

Depending on the relationship between the update timing of the previous value or present value in the module and its read
timing in the program, the previous value and present value may match.

If the previous value and present value match, read the values again. ( Page 95, Section 10.1 (7) (b))

82

CHAPTER 9 DISPLAY UNIT

CPU MON/TEST

CPU SETTINGS

MOD MON/TEST

MOD SETTINGS

USER MESSAGE

OPTIONS

SPECIFY I/O No.

MODULE LIST

SPECIFY I/O No.

MODULE LIST

BUF MEM MON/TES

INIT CHANGE

CH1

CH2

PRESET VALUE

COINCIDENCE NO1

COINCIDENCE NO2

RING COUNT MAX

COUNTER FUNC

RING COUNT MIN

SAMPLING/PERIOD

CHAPTER 9 DISPLAY UNIT

This chapter describes display unit functions that can be used for the high-speed counter module.

For details on operations, functions, and menu structure of the display unit, refer to the following.

MELSEC-L CPU Module User's Manual (Function Explanation, Program Fundamentals)

9.1 Features

The display unit is a liquid crystal display that can be connected to the CPU module. Connecting it to the CPU module

allows checking the system status and changing the system setting value even without using software packages.

9.2 Menu Transition

(1) Menu structure

The following diagram shows the "MOD MON/TEST" menu and the "MOD SETTINGS" menu structures.

9

9.1 Features

83

(2) Screen transition to the initial setting change screen

Module setting_module

specification screen

Initial setting change screen

Change item selection menu screen

Parameter-valid drive

confirmation screen

Channel selection screen

Module setting_module

selection screen

Module setting_start I/O No.

specification screen

Standby screen

Function selection screen

Initial setting change screen

Preset value setting screen

Coincidence output point

No.1 setting screen

Ring counter upper limit

setting screen

Ring counter lower limit

setting screen

Counter function

selection screen

Sampling/periodic time

setting screen

Coincidence output point

No.2 setting screen

The following figure shows screen transition to the initial setting change screen.

84

CHAPTER 9 DISPLAY UNIT

9.3 List of Setting Value Change Screens

The following table lists setting value change screens.

(1) User interface language is English

Name

Setting item Screen display

Preset value PRESET VALUE

Coincidence output point No.1 COINCIDENCE NO1

Coincidence output point No.2 COINCIDENCE NO2

Ring counter upper limit RING COUNT MAX

Ring counter lower limit RING COUNT MIN

Counter function selection COUNTER FUNC

Sampling/periodic time setting SAMPLING/PERIOD

Format

Numeric

value

Numeric

value

Numeric

value

Numeric

value

Numeric

value

Set by

user

Numeric

value

Setting range

Upper limit

value

2147483647 -2147483648

2147483647 -2147483648

2147483647 -2147483648

2147483647 -2147483648

2147483647 -2147483648



65535 1

Lower limit

value

9

9.3 List of Setting Value Change Screens

85

(2) Preset value

OK

OK

OK

"PRESET VALUE" screen

Input item

Input item

PRESET VALUE 2147483647 -2147483648

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

Setting range

Upper limit value Lower limit value

(3) Coincidence output point No.1

"COINCIDENCE NO1" screen

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

Input item

Input item

COINCIDENCE NO1 2147483647 -2147483648

Upper limit value Lower limit value

Setting range

(4) Coincidence output point No.2

"COINCIDENCE NO2" screen

Input item

Input item

COINCIDENCE NO2 2147483647 -2147483648

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

Setting range

Upper limit value Lower limit value

86

CHAPTER 9 DISPLAY UNIT

OK

OK

(5) Ring counter upper limit value

"RING COUNT MAX" screen

Input item

Input item

Ring counter upper limit value 2147483647 -2147483648

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

Setting range

Upper limit value Lower limit value

(6) Ring counter lower limit value

"RING COUNT MIN" screen

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

9

OK

Input item

Input item

RING COUNT MIN 2147483647 -2147483648

Upper limit value Lower limit value

Setting range

(7) Counter function selection

"COUNTER FUNC" screen

1. Use the and buttons to select "COUNT

DISABLE", "LATCH", "SAMPLING", or "PERIODIC

PULSE" and press the button.

(8) Sampling/periodic time setting

"SAMPLING/PERIOD" screen

1. Move the cursor using the and buttons,

increase or decrease the cursor position value

using the and buttons, and press the

button.

9.3 List of Setting Value Change Screens

OK

Input item

Input item

SAMPLING/PERIOD 65535 1

Upper limit value Lower limit value

Setting range

87

CHAPTER 10 PROGRAMMING

This chapter describes basic programs of the high-speed counter module.

10.1 Using the Module in Standard System Configuration

This section describes the system configuration and program examples based on conditions.

(1) System configuration

The following figure shows an example using the high-speed counter module in standard system configuration.

High-speed counter module (LD62)

CPU module (L26CPU-BT)

Input module (LX40C6)

Output module (LY41NT1P)

Power supply module (L61P)

When using the L02CPU, assign X/Y30 to X/Y3F for the high-speed counter module to set the same assignment as the
system above. For the LX40C6, assign X/Y40 to X/Y4F and for the LY41NT1P, assign X/Y50 to X/Y6F.

X/Y00

to

X/Y0F

X/Y10

to

X/Y2F

X/Y30

to

X/Y3F

X/Y40

to

X/Y4F

X/Y50

to

X/Y6F

(2) Programming condition

The program counts pulses input to CH1 of the high-speed counter module.

END cover (L6EC)

88

(3) Switch setting

Set a pulse input mode, counting speed, and counter type as follows:

CHAPTER 10 PROGRAMMING

Project window [Intelligent Function Module] [LD62] [Switch Setting]

Description

Item

Pulse input mode 2-Phase Multiple of 1 1-Phase Multiple of 1

Counting speed setting 200kpps 10kpps

Counter format User defined Linear Counter

*1 Leave unused channels with the default values.

CH1

(4) Initial setting

Item

Preset value 2500 0

Coincidence output point No.1 1000 0

Coincidence output point No.2 0 0

Ring counter upper limit

Ring counter lower limit

Counter function selection User defined Count Disabling Function

Sampling time setting

Periodic time setting

*2

*2

*3

*4

5000 0

-5000 0

10000ms 0

5000ms 0

CH1

Contents

CH2

CH2

10

*1

*1

10.1 Using the Module in Standard System Configuration

*1 Leave unused channels with the default values.
*2 Set these items when using the ring counter function.
*3 Set this item when using the sampling counter function.
*4 Set this item when using the periodic pulse counter function.

89

(5) User devices

Device Description

D0 and D1 Present value

D2 and D3 Latch count value

D4 and D5 Sampling count value

D6 and D7 Periodic pulse count previous value

D8 and D9 Periodic pulse count present value

D10 Overflow status storage

M10 Initial setting completion signal

X40 Count start signal

X41 Present value read signal

X42 Coincidence output data setting signal

X43 Preset command signal

X44 Count stop signal

X45 Coincidence LED clear signal

X46 Counter function start signal

X47 Counter function stop signal

X48 Latch count data read signal

X49 Latch execution signal

X4A Sampling count data read signal

X4B Sampling count start signal

X4C Periodic pulse count data read signal

X4D Periodic pulse count start signal

Y50 Coincidence confirmation LED signal

Y51 Overflow occurrence confirmation LED signal

X30 Module READY

X31 CH1 Counter value large (point No.1)

X32 CH1 Counter value coincidence (point No.1)

X33 CH1 Counter value small (point No.1)

X34 CH1 External preset request detection

X35 CH1 Counter value large (point No.2)

X36 CH1 Counter value coincidence (point No.2)

X37 CH1 Counter value small (point No.2)

Y30 CH1 Coincidence signal No.1 reset command

Y31 CH1 Preset command

Y32 CH1 Coincidence signal enable command

Y33 CH1 Down count command

Y34 CH1 Count enable command

Y35 CH1 External preset detection reset command

Y36

Y37 CH1 Coincidence signal No.2 reset command

CH1 Counter function selection start

command

LX40C6 (X40 to X4F)

LY41NT1P (Y50 to Y6F)

LD62 (X/Y30 to X/Y3F)

90

The input signal X3F is used by the system and is not available for users. If a user uses this signal (turning off and on), the
performance of the high-speed counter module is not guaranteed.

CHAPTER 10 PROGRAMMING

(6) Program example when intelligent function module parameters are used

(a) Setting parameters

Configure initial settings on the parameters.

Project window [Intelligent Function Module] [LD62] [Parameter]

10

Item Description Setting value

Preset value Enter a preset value. 2500

Coincidence output point

No.1

Coincidence output point

No.2

Ring counter upper limit

Ring counter lower limit -5000

Counter function selection

Sampling/periodic time

setting

(unit: 10ms)

Enter a value for the coincidence output point No.1. 1000

Not used 

Enter these values when using the ring counter function.

Select the counter function to be used.

Select any function when a counter function is not used.

Enter a value when using the sampling counter function. 1000

Enter a value when using the periodic pulse counter function. 500

5000

Depends on the function

used.

10.1 Using the Module in Standard System Configuration

91

(b) Auto refresh

Set auto refresh destination devices.

Project window [Intelligent Function Module] [LD62] [Auto_Refresh]

Item Description Setting value

Present value Enter the device where the present value is stored. D0

Latch count value Enter the device where the latch count value is stored. D2

Sampling count value

Periodic pulse count previous

value

Periodic pulse count present

value

Sampling/periodic counter

flag

Overflow detection

Enter the device where the sampling count value is stored when using the

sampling counter function.

Enter the device where the previous periodic pulse count value is stored

when using the periodic pulse counter function.

Enter the device where the present periodic pulse count value is stored

when using the periodic pulse counter function.

Not used 

Enter the device where the overflow detection result is stored when using

the linear counter function.

D4

D6

D8

D10

92

(c) Writing intelligent function module parameters

Write the set parameters to the CPU module, and reset the CPU module or power off and then on the

programmable controller.

[Online] [Write to PLC...]

Or powering off on the programmble controller

(d) Program example

CH1 Coincidence signal No.1 reset
command (Y30) is set or reset.

<Start of counting>

The LED indicating a match is turned on.

CH1 Coincidence signal No.1 reset
command (Y30) is set.

CH1 Coincidence signal No.1 reset
command (Y30) is reset.

CH1 Preset command (Y31) is set
or reset.

This program is set only when linear
counter is used.

<Stop of counting>

<Setting for external output of the counter value coincidence signal>

<Processing for counter value coincidence>

<Preset execution (by program)>

<Overflow detection>

A

CHAPTER 10 PROGRAMMING

10

To use each function, insert the following program into the position "A" in the program above.

• Using the count disable function

• Using the latch counter function

• Using the sampling counter function

• Using the periodic pulse counter function

10.1 Using the Module in Standard System Configuration

93

(7) Program example when intelligent function module parameters are not used

CH1 Preset value is set.

CH1 Coincidence output point No.1 is
set to 1000.

*1

*2

CH1 Ring counter lower limit is set.

CH1 Ring counter upper limit is set.

Initial setting completion flag is set.

The present value is stored in D0 and D1.

CH1 Coincidence signal No.1 reset
command (Y30) is set or reset.

The LED indicating a match is turned on.

CH1 Coincidence signal No.1 reset
command (Y30) is set.

CH1 Coincidence signal No.1 reset
command (Y30) is reset.

CH1 Preset command (Y31) is set or
reset.

Overflow status data is stored in
D10.

<Initial setting>

B

A

<Start of counting>

<Stop of counting>

<Storing the present value>

<Setting for external output of the counter value coincidence signal>

<Processing for counter value coincidence>

<Preset execution (by program)>

<Overflow detection>

Sampling time is set to 10000ms.

Periodic pulse time is set to 5000ms.

*1 Set these values when using the ring counter.
*2 Set this value when using the linear counter.

(a) Using the sampling counter function or the periodic pulse counter function

To use the sampling counter function or the periodic pulse counter function, insert the following program into

the position "A" in the program above.

• Using the sampling counter function

• Using the periodic pulse counter function

94

(b) Using each function

The count disable function is selected.

The latch count value is read.

The latch counter function is
selected.

The sampling count value is read.

The sampling counter function is
selected.

The periodic pulse counter function is
selected.

When the present value =
previous value,

data are read again.

The present and previous periodic
pulse count values are read.

To use each function, insert the following program into the position "B" in the program above.

• Using the count disable function

• Using the latch counter function

• Using the sampling counter function

CHAPTER 10 PROGRAMMING

10

• Using the periodic pulse counter function

10.1 Using the Module in Standard System Configuration

95

10.2 Connecting the Module to the Head Module

Network No.1

Ethernet cable (1000BASE-T)

CPU module (Q10UDHCPU)

Master/local module (QJ71GF11-T2)

Input module (QX10)

Output module (QY10)

X/Y1000

to

X/Y100F

X/Y1010

to

X/Y101F

X/Y1020

to

X/Y102F

Master station (station No.0)

Intelligent device station (station No.1)

Head module (LJ72GF15-T2)

High-speed counter module (LD62)

Input module (LX40C6)

Output module (LY10R2)

END cover (L6EC)

Power supply module (Q62P) Power supply module (L61P)

X/Y00

to

X/Y1F

X/Y20

to

X/Y2F

X/Y30

to

X/Y3F

This section describes the system configuration and program examples based on conditions.

(1) System configuration

The following figure shows a system configuration where the high-speed counter module is connected to the

head module.

(2) Programming condition

The program counts pulses input to CH1 of the high-speed counter module connected to a head module.

(3) Initial setting

Item

Preset value 2500 0

Coincidence output point No.1 1000 0

Coincidence output point No.2 0 0

Ring counter upper limit

Ring counter lower limit

Counter function selection User defined Count Disabling Function

Sampling time setting

Periodic time setting

*1 Leave unused channels with the default values.
*2 Set these items when using the ring counter function.
*3 Set this item when using the sampling counter function.
*4 Set this item when using the periodic pulse counter function.

*2

*2

*3

*4

5000 0

-5000 0

10000ms 0

5000ms 0

CH1

Contents

CH2

*1

96

CHAPTER 10 PROGRAMMING

(4) User devices

Device Description

W1000 and W1001 Device to which the present value is to be written at auto refresh

W1002 and W1003 Device to which the latch count value is to be written at auto refresh

W1004 to W1005 Device to which the sampling count value is to be written at auto refresh

W1006 and W1007 Device to which the periodic pulse count previous value is to be written at auto refresh

W1008 and W1009 Device to which the periodic pulse count present value is to be written at auto refresh

W1010 Device to which the overflow status storage is to be written at auto refresh

X20 Count start signal

X22 Coincidence output data setting signal

X23 Preset command signal

X24 Count stop signal

X25 Coincidence LED clear signal

X26 Counter function start signal

X27 Counter function stop signal

X29 Latch execution signal

X2B Sampling count start signal

X2D Periodic pulse count start signal

Y30 Coincidence confirmation LED signal

Y31

X1000 Module READY

X1002

Y1000

Y1001 CH1 Preset command

Y1002 CH1 Coincidence signal enable command

Y1004 CH1 Count enable command

Y1006

SB49 Data link status of the own station

SWB0.0 Data link status of each station (station No.1)

N0 Nesting (station No.1)

M0 Communication ready flag (station No.1)

T1 to T5 Interlock between the own and other stations

Overflow occurrence confirmation LED

signal

CH1 Counter value coincidence (point

No.1)

CH1 Coincidence signal No.1 reset

command

CH1 Counter function selection start

command

QX10 (X20 to X2F)

QY10 (Y30 to Y3F)

LD62 (X/Y1000 to X/Y100F)

10

10.2 Connecting the Module to the Head Module

97

(5) Setting parameters for the master station

1. Create a project on GX Works2.

Select "QCPU(Q mode)" for "PLC Series" and "Q10UDH" for "PLC Type".

[Project] [New...]

2. Open the network parameter setting window and set parameters as shown below.

Project window [Parameter] [Network Parameter]

[Ethernet/CC IE/MELSECNET]

98

3. Open the Network Configuration Setting window and set parameters as shown below.

Project window [Parameter] [Network Parameter]

[Ethernet/CC IE/MELSECNET] button