Omron SYSMAC CJ1W-AD04U, SYSMAC CJ1W-AD04U-SL Operation Manual

Universal Input Units

Cat. No. W466-E1-02

SYSMAC CJ Series
CJ1W-AD04U
CJ1W-AD04U-SL

OPERATION MANUAL

SYSMAC CJ Series

CJ1W-AD04U
CJ1W-AD04U-SL
Universal Input Units

Operation Manual

Revised December 2007

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Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam­age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be severe property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be severe property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program­ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3...

1. Indicates lists of one sort or another, such as procedures, checklists, etc.

 OMRON, 2006

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of
OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con­stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

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TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

2 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

SECTION 1

Features and System Configuration . . . . . . . . . . . . . . . . 1

1-1 Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-3 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4 Functions Listed by Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SECTION 2

Specifications and Component Names . . . . . . . . . . . . . . 9

2-1 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-2 Input Types and Data Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2-3 Nomenclature and Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION 3

Installation and Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3-1 Installing the Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3-2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SECTION 4

Input Functions and Operating Procedures . . . . . . . . . . 23

4-1 Exchanging Data with the CPU Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4-2 Detailed Description of User Settings Area Data . . . . . . . . . . . . . . . . . . . . . . . . . 33

4-3 Expansion Setting Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

SECTION 5

Error Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

5-1 Indicators and Error Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-2 Errors Detected by the Universal Input Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-3 Errors Related to the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-4 Restarting Special I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-5 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

viii

TABLE OF CONTENTS

Appendices

A Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

B Supplementary Explanations of Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

C Data Coding Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

ix

About this Manual:

This manual describes the specifications, installation, troubleshooting, and other information on the
CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units. This manual includes the sections
described below.

Please read this manual and the other manuals related to the Universal Input Units carefully and be
sure you understand the information provided before attempting to install and operate the Units. The
manuals used with the Universal Input Units are listed in the following table. The suffixes have been
omitted from the catalog numbers. Be sure you are using the most recent version for your area.

Section 1 introduces the features and primary functions, describes the system configuration, and out­lines the operating procedure.

Section 2 describes the specifications, component names, and switch settings of the CJ1W-AD04U
and CJ1W-AD04U-SL Universal Input Units.

Section 3 explains how to install and wire the CJ1W-AD04U and CJ1W-AD04U-SL Universal Input
Units.

Section 4 describes the input functions and operating procedures of the CJ1W-AD04U and CJ1W­AD04U-SL Universal Input Units.

Section 5 explains how to troubleshoot errors and alarms that occur in the CJ1W-AD04U and CJ1W­AD04U-SL Universal Input Units.

Appendix A provides details on dimensions.

Appendix B provides supplementary explanations of functions.

Appendix C provides data coding tables.

Name Cat. No. Contents

SYSMAC CJ-series
CJ1G-CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Operation Manual

W393 Describes the installation and operation

of the CJ-series PLCs.

SYSMAC CS/CJ-series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H, CJ1G­CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Programming Manual

W394 Describes the programming methods

required to use the functions of the CS/
CJ-series PLCs.

SYSMAC CS/CJ-series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H, CJ1G­CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Instructions Reference Manual

W340 Describes the ladder diagram program-

ming instructions supported by CS/CJ­series PLCs.

SYSMAC WS02-CXPC1-EV70
CX-Programmer Ver. 7.0 Operation Manual

W446 Provides information on how to use the

CX-Programmer, a programming device
that supports the CS/CJ-series PLCs.

SYSMAC CS/CJ-series
CQM1H-PRO01-E, CQM1-PRO01-E, C200H-PRO27-E
Programming Consoles Operation Manual

W341 Provides information on how to program

and operate CS/CJ-series PLCs using a
Programming Console.

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

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Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON­INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.

In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

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Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xiii

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

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xv

PRECAUTIONS

This section provides general precautions for using the Universal Input Units.

The information contained in this section is important for the safe and reliable application of the Universal Input
Unit. You must read this section and understand the information contained before attempting to set up or operate
a Universal Input Unit.

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

xvi

Intended Audience 1

1 Intended Audience

This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).

• Personnel in charge of installing FA systems

• Personnel in charge of designing FA systems

• Personnel in charge of managing FA systems and facilities

2 General Precautions

The user must operate the product according to the performance specifica­tions described in the operation manuals.

Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse­ment machines, safety equipment, and other systems, machines, and equip­ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.

This manual provides information for operating the OMRON Universal Input
Units. Be sure to read this manual before attempting to use a Universal Input
Unit and keep this manual close at hand for reference during operation.

!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-

fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned appli­cations.

3 Safety Precautions

!WARNING Do not attempt to take any Unit apart while power is being supplied. Doing so

may result in electric shock.

!WARNING Provide safety measures in external circuits (i.e., not in the Programmable

Controller), including the following items, in order to ensure safety in the sys­tem if an abnormality occurs due to malfunction of the PLC or another exter­nal factor affecting the PLC operation. Not doing so may result in serious
accidents.

• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.

• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.

• The PLC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter-

xvii

Operating Environment Precautions 4

measure for such problems, external safety measures must be provided
to ensure safety in the system.

• When the 24-VDC output (service power supply to the PLC) is overloaded
or short-circuited, the voltage may drop and result in the outputs being
turned OFF. As a countermeasure for such problems, external safety
measures must be provided to ensure safety in the system.

!WARNING Do not apply a voltage or current outside the specified range to this Unit.

Doing so may result in malfunction or fire.

!Caution When wiring crossovers between terminals, the total current for both terminals

will flow in the line. Check the current capacities of all wires before wiring
crossovers.

!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the

torque specified in the operation manual. The loose screws may result in
burning or malfunction.

!Caution Execute online edit only after confirming that no adverse effects will be

caused by extending the cycle time. Otherwise, the input signals may not be
readable.

4 Operating Environment Precautions

!Caution Do not operate the control system in the following places:

• Locations subject to direct sunlight.

• Locations subject to temperatures or humidity outside the range specified
in the specifications.

• Locations subject to condensation as the result of severe changes in tem­perature.

• Locations subject to corrosive or flammable gases.

• Locations subject to dust (especially iron dust) or salts.

• Locations subject to exposure to water, oil, or chemicals.

• Locations subject to shock or vibration.

!Caution Take appropriate and sufficient countermeasures when installing systems in

the following locations:

• Locations subject to static electricity or other forms of noise.

• Locations subject to strong electromagnetic fields.

• Locations subject to possible exposure to radioactivity.

• Locations close to power supplies.

xviii

Application Precautions 5

5 Application Precautions

Observe the following precautions when using the PLC.

!WARNING Always heed these precautions. Failure to abide by the following precautions

could lead to serious or possibly fatal injury.

• Always connect to a class-3 ground (to 100

Ω or less) when installing the

Units. Not connecting to a class-3 ground may result in electric shock.

• Always turn OFF the power supply to the PLC before attempting any of
the following. Not turning off the power supply may result in malfunction or
electric shock.

• Mounting or dismounting I/O Units, CPU Units, Memory Cassettes, or
any other Units.

• Assembling the Units.

• Setting DIP switch or rotary switches.

• Connecting or wiring the cables.

!Caution Failure to abide by the following precautions could lead to faulty operation of

the PLC or the system, or could damage the PLC or PLC Units. Always heed
these precautions.

• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.

• Always use the power supply voltage specified in this manual. An incor­rect voltage may result in malfunction or burning.

• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.

• Install external breakers and take other safety measures against short-cir­cuiting in external wiring. Insufficient safety measures against short-cir­cuiting may result in burning.

• Do not apply voltages to input sections in excess of the rated input volt­age. Excess voltages may result in burning.

• Do not apply voltages or connect loads in excess of the maximum switch­ing capacity to output sections. Excess voltage or loads may result in
burning.

• Be sure that all the mounting screws, terminal screws, and cable connec­tor screws are tightened to the torque specified in the relevant manuals.
Incorrect tightening torque may result in malfunction.

• Wiring correctly, as indicated in this manual.

• Do not attempt to disassemble, repair, or modify any Units.

• Be sure to confirm that the DIP switch and the data memory (DM) are
properly set.

• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction.

• Remove the labels after the completion of wiring to ensure proper heat
dissipation. Leaving the label attached may result in malfunction.

xix

Application Precautions 5

• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.

• Do not pull on cables and cords and do not bend them past their natural
bending radius.

• Do not place any heavy objects on cables or cords.

• Mount the Unit only after checking the terminal block completely.

• Be sure that the terminal blocks, Memory Units, expansion cables, and
other items with locking devices are properly locked into place. Improper
locking may result in malfunction.

• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera­tion.

• Double-check all the wiring before turning on the power supply. Incorrect
wiring may result in burning.

• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.

• Changing the operating mode of the PLC (including the setting of the
startup operating mode).

• Force-setting/force-resetting any bit in memory.

• Changing the present value of any word or any set value in memory.

• Touch a grounded metal object to discharge static electricity from your
body before touching any Unit.

• The following precautions apply to Power Supply Units with Replacement
Notification.

• When the LED display on the front of the Power Supply Unit starts to
alternately display “0.0” and “A02” or the alarm output automatically
turns OFF, replace the Power Supply Unit within 6 months.

• Separate the alarm output cables from power lines and high-voltage
lines.

• Do not apply a voltage or connect a load to the alarm output that ex­ceeds the rated voltage or load.

• Maintain an ambient storage temperature of

−20 to 30°C and humidity

of 25% to 70% when storing the product for longer than 3 months to
keep the replacement notification function in optimum working condi­tion.

• Always use the standard installation method. A nonstandard installa­tion will decrease heat dissipation, delay the replacement notification
signal, and may degrade or damage the internal elements.

• This product is EMC compliant when assembled in a complete PLC sys­tem of the specified PLC Series. Refer to the applicable manual for
grounding, cable selection, and any other conditions for EMC compliance.

• This is a class A product. In residential areas it may cause radio interfer­ence, in which case the user may be required to take adequate measures
to reduce interference.

xx

Conformance to EC Directives 6

6 Conformance to EC Directives

Applicable Directives •EMC Directives

• Low Voltage Directive

Concepts

■ EMC Directives

OMRON supplies electric devices that are used built into other devices or
manufacturing equipment. These OMRON products are designed to conform
to the related EMC standards (see note) so that the devices or equipment in
which they are used can more easily conform to EMC standards.

EMC-related performance of the OMRON devices that conform to EC Direc­tives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.

Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:

EMS (Electromagnetic Susceptibility)

EN 61000-6-2

EMI (Electromagnetic Interference)

EN 61000-6-4 (Radiated emission: 10-m regulations)

■ Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 V AC and 75
to 1,500 V DC meet the required safety standards for the PLC (EN 61131-2.)

Conformance to EC
Directives

CJ-series products conform to EC Directives. However, the following precau­tions must be observed to ensure that the machine or device in which the CJ­series PLC is used conforms to EC Directives:

1. The CJ-series PLC must be installed within a control panel.

2. You must use reinforced insulation or double insulation for the DC power
supplies used for the I/O power supplies. The DC power supply connected
to the power supply terminals on PLCs using DC power must have an out­put hold time of at least 10 ms.

3. CJ-series products conforming to EC Directives also conform to EN
61000-6-4 for EMI. Radiated emission characteristics (10-m regulations)
may vary depending on the configuration of the control panel used, other
devices connected to the control panel, wiring, and other conditions. You
must therefore confirm that the overall machine or equipment conforms to
EC Directives even when using CJ-series products that conform to EC Di­rectives.

1

SECTION 1

Features and System Configuration

This section introduces the features and primary functions, describes the system configuration, and outlines the operating
procedure.

1-1 Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-3 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4 Functions Listed by Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2

Features and Functions Section 1-1

1-1 Features and Functions

This section introduces the features and primary functions of the CJ-series
CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units.

Four Input Channels The CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units are CJ-series

Special I/O Units with four input channels on each Unit. Each input channel
can be set independently to one of four input types: DC voltage, DC current,
thermocouple, or resistance thermometer.

Isolation between
Channels

The input channels are isolated in the Universal Input Unit, so unwanted cur­rent paths will not occur between thermocouple inputs or voltage inputs that
share the same power supply. Signal converters are not needed to prevent
interference between inputs.

DC current input
4 to 20 mA, 0 to 20 mA

DC voltage input
1 to 5 V, 0 to 5 V,

0 to 10 V

Thermocouple input
K, J, T, L, R, S, B

Platinum resistance
thermometer input

Pt100 (JIS, IEC)
Pt1000, JPt100

V

mA

Universal Input Units

Screw-terminal model: CJ1W-AD04U

Pin-terminal model: CJ1W-AD04U-SL

Channel 1

Channel 2

Channel 3

Channel 4

Universal Input Unit

Isolation

Isolation

Isolation

3

Features and Functions Section 1-1

Scaling Function This function takes the value scaled in industrial units with respect to the input

signal and transfers it to the CPU Unit as the process value. Because of this,
no ladder program is required at the CPU Unit for scaling.

Process Value Alarms Two process values can be set as alarm outputs (high and low alarms). Also,

an alarm notification can be passed directly to an output device by using the
Expansion Settings Area.

Alarm Hysteresis Settings The hysteresis values can be set for the process value alarms. Frequent ON/

OFF switching of the alarm output can be eliminated by setting a dead zone
between the alarm output’s start and stop.

Alarm Output ON Delay A fixed time delay can be set before the output starts for an alarm output (high

or low limit). The ON delay can be set between 0 and 60 s. Each channel’s
ON delay is set independently, but the same ON delay applies to the channel’s
high and low limit alarms.

Input signal

Industrial unit

4

20 mA

0

Lower limit

800 Pa

Upper limit

High limit alarm (H)

Low limit alarm (L)

Process value input

Alarm output (H)

Alarm output (L)

Hysteresis

H

y

steresis

High limit alarm (H)

Low limit alarm (L)

Process value input

Alarm output (H)

Alarm output (L)

4

Features and Functions Section 1-1

The following example shows the operation of the high limit alarm output.

Input Error Detection An error input can be detected if the input signal significantly exceeds the high

or low limit.

Note With thermocouple and platinum resistance thermometer inputs, an input

error is detected if the temperature exceeds the high or low limit of the sensor
range by 20

°C or 20°F.

With voltage and current inputs, an error is detected only for the following val­ues in the 1 to 5 V and 4 to 20 mA ranges:

• 1 to 5 V range: Converted AD value < 0.3 V

• 4 to 20 mA range: Converted AD value < 1.2 mA

Either the high or low direction can be specified for the detection of a discon­nection.

The allowable range limits are as follows:

• Temperature Input

Upper limit: Upper limit of temperature range +20

°C or +20°F

Lower limit: Lower limit of temperature range

−20°C or −20°F

• Voltage/Current Input

Upper limit: 105%

Lower limit:

−5%

Note Sensor error detection is effective only when the input type is set to thermo-

couple input, platinum resistance thermometer input, 1 to 5 V input, or 4 to
20 mA input. The Sensor Error Flag will be turned ON if there is no input sig­nal from the thermocouple input, platinum resistance thermometer input, 1 to
5 V input, or 4 to 20 mA input.

Detection of Cold
Junction Sensor Errors

If the Unit’s built-in cold junction sensor fails, the Cold Junction Sensor Error
Flag will be turned ON to indicate the error.

Zero/Span Adjustment The zero point and span point can be adjusted for a process value.

The zero adjustment offsets the line plotting values before and after adjust­ment parallel to the original line. The span adjustment changes the slope of
the line (i.e., the gain) around the minimum value in the range.

Time

Hysteresis

ON delay time

High limit alarm (H)

Process value input

Alarm output (H)

Universal Input Unit

Disconnection

Sensor

Error Flag

CPU Unit

ON

High/low designation:
high or low

5

System Configuration Section 1-2

The zero adjustment value and the span adjustment gain are set in the DM
Area words allocated in the CPU Unit. These settings are refreshed during
operation, so the values can be adjusted under normal operating conditions.

Refer to

4-2-3 Zero/Span Adjustment for details.

1-2 System Configuration

Basic Configuration

Note The above diagram is an installation example for a CJ1W-AD04U and CJ1W-

AD04U-SL Universal Input Unit and CJ1W-DA041 Analog Output Unit.

Zero adjustment value

Maximum range

Output data

Maximum range

Minimum range

Before adjustment

Minimum range

Input

After adjustment

Gain for
span
adjustment

Zero/Span Adjustment

CPU Unit

Universal Input Unit

Analog Output Unit

Regulator

Servo
controller

Variable speed
controller

Chart
recorder

Temperature
Pressure
Speed
Flow rate

Voltage
Current
Powe r
Power factor

Sensor

Sensor

(Temperature control)

(Position control)

(Speed control)

6

System Configuration Section 1-2

Mounting Restrictions

The CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units are CJ-series
Special I/O Units. The following restrictions apply to the mounting location and
number of a mounted Universal Input Units.

• The Universal Input Unit can be mounted only in a CJ-series CPU Rack or
CJ-series Expansion Rack.

• The number of Universal Input Units that can be mounted to one Rack
(i.e., a CPU Rack or Expansion Rack) depends on the capacity of the
Power Supply Unit and the current consumption of other Units in the
Rack. The following table shows the maximum number of Units that can
be mounted if only Universal Input Units are mounted.

Note I/O words are allocated to the Special I/O Unit according to the setting of the

unit number switch on the front panel of the Unit, and not the slot number
where the Unit is mounted.

Power Supply Unit Rack CJ1W-AD04U

CJ1W-AD04U-SL

(5 V DC 320 mA)

CJ1W-PA205R
CJ1W-PA205C
CJ1W-PD025
(5.0 A at 5 V DC)

CPU Rack 9

Expansion Rack 10

CJ1W-PA202
(2.8 A at 5 V DC)

CPU Rack 4

Expansion Rack 7

CJ1W-PD022
(2.0 A at 5 V DC)

CPU Rack 2

Expansion Rack 5

7

Operating Procedure Section 1-3

1-3 Operating Procedure

Follow the procedure outlined below when using a Universal Input Unit.

1-4 Functions Listed by Purpose

Purpose Function Page

Displaying the input signal level in actual units Scaling function P. 35

Generating an alarm when the process value exceeds a low or high limit Process value alarm P. 37

Preventing the alarm output from being output too often if the process
value crosses the high or low limit (H or L) frequently.

Alarm hysteresis setting P. 38

Alarm ON delay P. 38

Detecting a disconnected input signal Sensor error detection function P. 36

Set the unit number.

Turn ON the power to the PLC.

Wire the Unit.

Create the I/O tables.

Make the Special I/O Unit DM
Area settings.

Turn ON the PLC's power again.

Use the unit number switch on the front panel of the Unit to set
the unit number.

Turn ON the power to the PLC.

Set the input numbers to be used.
Set the DM Area settings such as the various alarm settings.

Or turn the power to the PLC OFF and ON, or turn ON the
Special I/O Unit Restart Bit.

Installation and Settings

(Perform the following steps when inputs must be adjusted for the connected devices.)

Warm up.

Turn OFF the power to the PLC.

Zero/span adjustment

Zero/span adjustment

Turn ON the power to the PLC.

Ladder program

Read conversion values or write set values by means of
MOV(021) and XFER(070).
Obtain disconnection notifications and error codes.

Operation

8

Functions Listed by Purpose Section 1-4

Adjusting the zero and span settings for particular I/O devices Zero/span adjustment P. 34

Outputting a high or low alarm without ladder programming Expansion Setting Area settings P. 39

Obtaining a process value with a negative gain Process value scaling with negative

gain

P. 5 3

Identifying the causes of errors Error processing P. 43

Purpose Function Page

9

SECTION 2

Specifications and Component Names

This section describes the specifications, component names, and switch settings of the CJ1W-AD04U and CJ1W-AD04U­SL Universal Input Units.

2-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-2 Input Types and Data Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2-3 Nomenclature and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

10

Specifications Section 2-1

2-1 Specifications

Specifications

Note 1. Do not apply a voltage higher than 600 V to the terminal block when per-

forming withstand voltage test on this Unit. Otherwise, internal elements
may deteriorate.

2. Refer to Dimensions on page 49 for details on the Unit’s dimensions.

3. The following table is for a Rack containing only Universal Input Units.
When other Units are mounted, the maximum number of Universal Input
Units may be lower, depending on the current consumption of the other
Units mounted in the Rack.

4. I/O words are allocated to the Special I/O Unit according to the setting of
the unit number switch on the front panel of the Unit, and not the slot num­ber where the Unit is mounted.

Unit type

Items

CJ1W-AD04U

Screw terminal model

CJ1W-AD04U-SL

Screwless terminal model

External connection terminals 18-point removable terminal block

(M3 screws)

18-point removable terminal block
(Screwless spring-clamp type)

Unit classification CJ-series Special I/O Unit

Isolation (See note 1.) Between inputs and PLC signals:

Transformer isolation of power supply and photocoupler isolation of signals
Between inputs:

Transformer isolation of power supply and photocoupler isolation of signals

Effect on CPU Unit cycle time 0.2 ms

Power consumption 320 mA max. at 5 VDC
Dimensions (See note 2.) 31 × 90 × 65 mm (W × H × D)

Weight 140 g max.

General specifications Conforms to general specifications for SYSMAC CJ Series.

Mounting position CJ-series CPU Rack or CJ1-series Expansion Rack

Maximum number of Units
(See note 3.)

4 to 10 Units per Rack

Data exchange with CPU Units
(See note 4.)

Special I/O Unit Area in CIO Area (CIO 2000 to CIO 2959): 10 words per Unit
Special I/O Unit words in DM Area (D20000 to D29599): 100 words per Unit

Power Supply Unit Rack CJ1W-AD04U

CJ1W-AD04U-SL

CJ1W-PA205R
CJ1W-PA205C
CJ1W-PD025

(5.0 A at 5 VDC)

CPU Rack 9

Expansion Rack 10

CJ1W-PA202
(2.8 A at 5 VDC)

CPU Rack 4

Expansion Rack 7

CJ1W-PD022
(2.0 A at 5 VDC)

CPU Rack 2

Expansion Rack 5

11

Specifications Section 2-1

• Data Exchange with the CPU Unit (For details, refer to SECTION 4 In-

put Functions and Operating Procedures

.)

Input Specifications

Special I/O Unit Area in CIO
Area (CIO 2000 to CIO 2959,
CIO 2000.00 to CIO 2959.15)

Regularly exchanges 10 words per Unit.
(CPU Unit ↔ Universal Input Unit)

Special I/O Unit words in DM
Area (D20000 to D29599)

Transfers 100 words of data per Unit. The
following data is transferred at the indi­cated time.

• Initial settings data: Transferred when
power is turned ON or the Unit is
restarted.

• Continuously refreshed data (e.g., alarm
settings): Transferred during I/O refresh
period.

• Expansion Setting Area: Transferred
during the I/O refresh period.

(CPU Unit ↔ Universal Input Unit)

Items Specifications

Number of analog inputs 4

Input type
(See note 1.)

• Platinum resistance thermometer:
Pt100 (JIS, IEC), PT1000, or JPt100

• Thermocouple: K, J, T, L, R, S, or B

• Current: 4 to 20 mA, or 0 to 20 mA

• Voltage: 1 to 5 V, 0 to 5 V, or 0 to 10 V

Each input can be set independently.

Maximum rated input
(See note 2.)

Voltage Input: ±15 V
Current Input: ±30 mA

Input impedance Temperature: 10 kΩ min.

Voltage Input: 1 MΩ min.
Current Input: 250 Ω (rated value)

Resolution 12,000 (for voltage or current input)

Converted output data 16-bit binary data
Accuracy (25°C)

(These values do not
include the sensor error.)

Typical thermocouple inputs:
(±0.3% of PV or ±1.5°C, whichever is greater) ±1 digit
max.

Special cases:

• The accuracy of L is ±2°C ±1 digit max.

• The accuracy of K and T at −100°C or less is ±2°C ±1
digit max.

• The accuracy of R and S at 200°C or less is ±3°CV1
digit max.

• The accuracy of B at 400°C or less is not specified.

Platinum resistance thermometers:
(±0.3% of PV or ±0.8°C, whichever is greater) ±1 digit
max.

Voltage inputs and current inputs:
(±0.3% FS) ±1 digit max.

Temperature coefficient +/−100 ppm FS/°C max.

Warm-up time 30 min

A/D conversion time
(See note 3.)

250 ms/4 inputs

12

Input Types and Data Conversion Section 2-2

Note 1. Input signal ranges can be set for each input.

2. Use the analog input voltage/current value within the specified input signal­range. Exceeding the specified range may result in malfunction.

3. A/D conversion time is the time it takes for an analog signal to be stored in
memory as converted data after it has been input. It takes at least one cy­cle before the converted data is read by the CPU Unit.

Input Conversion and Alarm Output Functions

Note Sensor error detection is effective only when the input type is set to thermo-

couple input, platinum resistance thermometer input, 1 to 5 V input, or 4 to
20 mA input. The Sensor Error Flag will be turned ON if there is no input sig­nal from the thermocouple input, platinum resistance thermometer input, 1 to
5 V input, or 4 to 20 mA input.

2-2 Input Types and Data Conversion

In addition to voltage and current inputs, the temperature sensors listed below
can be connected directly to a Universal Input Unit.

Voltage and Current Inputs

Measurement method for
platinum resistance ther­mometer inputs

3-wire method

Allowable lead wire
resistance

20 Ω max. per wire

Items Specifications

Item Specifications

Process value alarms Two alarms (high and low) with hysteresis. The alarms

can be set separately for each input.

ON-delay timer 0 to 60 s, independently settable for each input

Scaling
(Voltage and current
inputs)

Any industrial units can be set by setting the upper and
lower limits in the range of −32,000 to 32,000. These lim­its are converted as full scale.

Each input can be set independently.

Zero/span adjustment • Zero adjustment (offset) range: ±9,999 (LSB)

• Span adjustment (gain) range: 0 to 32,000 (×0.0001)
Each input can be set independently.

Sensor error detection Detects sensor error at each input and turns ON the Sen-

sor Error Flag. (See note.)

Cold junction sensor
error

Detects errors in the cold junction sensor. and turns ON
the Cold Junction Sensor Error Flag.

Voltage/current input DM Area setting

Voltage input (DC) 1 to 5 V 0050 (0032 hex)

0 to 5 V 0053 (0035 hex)

0 to 10 V 0054 (0036 hex)

Current input (DC) 4 to 20 mA 0048 (0030 hex)

0 to 20 mA 0049 (0031 hex)

13

Input Types and Data Conversion Section 2-2

Temperature Inputs

The measured temperature error is calculated as shown in the following
example.

Example:

Overall accuracy =
Reference accuracy + Temperature characteristic

× Change in ambient tem-

perature =

±1.5°C + (±0.13°C) × 5°C = ±2.2°C ±1 digit.

Input Function Block Diagram

The following calculations can be performed in series on the converted pro­cess value, and the resulting value can be transferred to the CPU Unit as the
converted value. Since the adjustments are performed in the Unit, there is no
need to process the data in the CPU Unit’s ladder program.

Sensor type DM Area

setting

Measurable input range

°C °F

Resistance ther­mometers

Pt100 0 (0000 hex) −200.0 to 650.0 −300.0 to 1200.0
JPt100 3 (0003 hex) −200.0 to 650.0 −300.0 to 1200.0
Pt1000 7 (0007 hex) −200.0 to 650.0 −300.0 to 1200.0

Thermocouples K 21 (0015 hex) −200.0 to 1300.0 −300.0 to 2300.0

J 23 (0017 hex) −100.0 to 850.0 −100.0 to 1500.0
T 25 (0019 hex) −200.0 to 400.0 −300.0 to 700.0
L 33 (0021 hex) −100.0 to 850.0 −100.0 to 1500.0

R 36 (0024 hex) 0.0 to 1700.0 0.0 to 3000.0

S 37 (0025 hex) 0.0 to 1700.0 0.0 to 3000.0

B 38 (0026 hex) 100.0 to 1800.0 300.0 to 3200.0

Item Details

Ambient temperature 30°C

Thermocouple type K

Measured tempera­ture (PV)

500°C

Reference accuracy
(25°C)

±0.3°C of PV or ±1.5°C, whichever is greater, ±1 digit.
In this example, ±1.5°C

Temperature charac­teristics

When the coefficient is ±100 ppm FS/°C, the characteristic in
this example is 100 ppm × 1300°C = 0.13°C

Change in ambient
temperature

25°C → 30°C = 5°C

Analog input 1

Analog input 2

Analog input 3

Analog input 4

A/D

conver-

sion

Sensor

error

detection

Scaling

Zero/span

adjustment

PV alarm

comparison

Analog input 1

process value

Analog input 2

process value

Analog input 3

process value

Analog input 4

process value

Universal Input Unit

CPU Unit

Special I/O Unit Area

I/O refresh

Same as above.

Same as above.

Same as above.

Input

calcula-

tions

14

Input Types and Data Conversion Section 2-2

Internal Configuration

+5 V

Input 1

Input 1

Input 2
Input 3
Input 4

Insulating

power

circuit

EEPROM

Double

integration

A/D

Amplifier

Indicators/

Switch

MPU

Bus

interface

RAM ROM

CJ-series PC

Photocoupler insulation

Oscilla-

tor

Division

Input

Terminal

block

for

external

connections

Input 2

Double

integration

A/D

Amplifier

Input 3

Double

integration

A/D

Amplifier

Input 4

Double

integration

A/D

Amplifier

15

Nomenclature and Functions Section 2-3

2-3 Nomenclature and Functions

Components

MACH

No.

AD04U

RUN
ERC
ERH

B1 A1

x10

1

x10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

MACH

No.

AD04U

RUN
ERC
ERH

B1 A1

x10

1

x10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

FRONT

CJ1W-AD04U-SL

Unit number
setting switch

DIN Track
mounting pin

Indicators

Terminal block

CJ1W-AD04U

Slider

Slider

SIDE

Expansion
connector

Slider

Slider

Expansion
connector

Terminal block lock lever

(p

ull down to release terminal block

)

CJ1W-AD04U CJ1W-AD04U-SL

16

Nomenclature and Functions Section 2-3

Indicators

The indicators show the operating status of the Unit. The following table
shows the meanings of the indicators.

Unit Number Switch

The CPU Unit and Universal Input Unit exchange data via the Special I/O Unit
Area and the Special I/O Unit words in the DM Area.

The Special I/O Unit Area word addresses and Special I/O Unit word
addresses in the DM Area that each Universal Input Unit occupies are set by
the unit number switch on the front panel of the Unit. Refer to page 26 for
details on the unit number setting.

Note If two or more Special I/O Units are assigned the same unit number, a “UNIT

No. DPL ERR” error (in the Programming Console) will be generated
(A401.13 will turn ON) and the PLC will not operate.

The fatal error code, error contents, and time of occurrence are stored as an
error record in the Auxiliary Area of the CPU Unit.

LED Meaning Indicator Operating status

RUN (green) Operating Lit Operating normally.

Not lit Unit has stopped exchanging data with the CPU Unit.

ERC (red) Error detected by

Unit

Lit An alarm occurred (such as detection of a sensor error) or

there is an incorrect setting in the DM Area settings.

Not lit Operating normally.

ERH (red) Error in the CPU

Unit

Lit Error has occurred during data exchange with the CPU Unit.

Not lit Operating normally.

MACH

No.

× 10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

× 10

1

Unit number
setting switches

17

SECTION 3

Installation and Wiring

This section explains how to install and wire the CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units.

3-1 Installing the Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3-2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

18

Installing the Units Section 3-1

3-1 Installing the Units

Mount the Universal Input Unit in a CJ-series CPU Rack or Expansion Rack.

Use the following procedure to mount the Units.

1,2,3... 1. Align the connectors and press in firmly on the Units to connect them com-

pletely.

2. Move the yellow sliders on the top and bottom of the Unit to the lock posi­tion to secure the Units. The sliders should click into place.

3. Attach an End Cover to the Unit on the right end of the Rack.

Note • The CJ-series PLC may not operate properly if the sliders are not locked

firmly into place.

• Always mount an End Cover.

Handling Precautions

• Be sure to turn OFF the power supply to the PLC before installing or dis­connecting Units or wiring.

• To reduce the risk of malfunctioning due to electrical noise, wire input and
output lines in separate ducts from high-voltage and power lines.

CPU Rack

Power Supply Unit CPU Unit

Connected Units
(10 max.)

End Cover
(included with CPU Unit)

Hooks

Connector

Hook holes

Move the sliders to the back
until they click into place.

Slider

Release

Lock

19

Wiring Section 3-2

• When wiring a Unit, leave the protective label on the top of the Unit in
place to prevent wire clippings or other materials from getting inside the
Unit. When the wiring has been completed, the label must be removed to
allow air to flow for cooling.

3-2 Wiring

Terminal Arrangement

The following diagram shows the signal names associated with the connect­ing terminals.

The Universal Input Units have 4 input channels on each Unit, and the type of
input connected to each channel can be set independently.

Wiring Analog Inputs

Ground the shield of the shielded cable to protect against the affects of noise.

Note 1. Be sure to wire the correct terminals when wiring voltage inputs. The Unit

may fail if a voltage input is wired incorrectly.

2. Do not connect anything to terminals that are not being used.

3. Do not connect anything to NC terminals. Do not use NC terminals as relay
terminals.

AD041

M

A

C

H

N

o

.

x1

0

1

x

1

0

0

R

U

N

E

R

C

E

R

H

Remove the label after the
wiring has been completed.

Voltage

input

Platinum

resistance

thermometer

Thermo-

couple

N.C. B1

N.C. B2

N.C. B3

Input 2 V+ B4

Input 2− B5

Input 2 I+ B6

Input 4 V+ B7

Input 4− B8

Input 4 I+ B9

A1

N.C.

A2

N.C.

A3

N.C.

A4

Input 1 V+

A5

Input 1−

A6

Input 1 I+

A7

Input 3 V+

A8

Input 3−

A9

Input 3 I+

+

−

+

+

−

+

−

Current

input

−

B

B

A

A

−

+

−

+

b

b

Voltage

input

Platinum

resistance

thermometer

Thermo-

couple

+

−

+

+

−

Current

input

V

mA

mA

B

B

A

A

−

+

−

+

b

b

V

+

−

−

V

V

mA

mA

Two-core, shielded
twisted-pair cable

Analog
output signal

CJ1W-AD04U
Universal Input Unit

FG

20

Wiring Section 3-2

4. Wire the same lengths to A, B, and b so that the impedance will be the
same. In particular, do not short circuit between B and b at the terminal
block.

5. Always ground the GR terminal on the Power Supply Unit of the PLC.

6. If the input device uses a voltage generator, temperature compensator, or
similar device, ground the input device if it has a ground terminal.

7. The cold junction compensators are individually calibrated for each Unit
and each input circuit. If the terminal block from a different Unit is used,
temperature measurements will not be accurate. Always use the terminal
block that is delivered with the Unit.

Wiring a Screw Terminal Block (CJ1W-AD04U)

• Crimp-type terminals must be used for terminal connections, and the
screws must be tightened securely. Use M3 screws and tighten them to a
torque of 0.5 N·m.

• Do not make any connections to the N.C. terminals.

• Recommended crimp terminals

Terminal Block Arrangement

M3 screw

6.0 mm max.

Fork type Round type

6.0 mm max.

Row

B

Terminal block lock lever

B1

A1

B9

A9

Terminal block cover

NC B1

NC B2

NC B3

Input 2 V+ B4

Input 2 − B5

Input 2 I+ B6

Input 4 V+ B7

Input 4 − B8

Input 4 I+ B9

A1 NC

A2 NC

A3 NC

A4 Input 1 V+

A5 Input 1−

A6 Input 1 I+

A7 Input 3 V+

A8 Input 3−

A9 Input 3 I+

Row

A

Use crimp terminals
on the input lines.

21

Wiring Section 3-2

Wiring a Screwless Clamp Terminal Block (CJ1W-AD04U-SL)

Terminal Block Arrangement

• Strip about 10 mm of the insulation from the end of the wire and insert the
bare wire or attach a pin terminal.

• If bare stranded wire is used without a pin terminal, be sure that there are
no loose wire strands that may contact another circuit.

Connecting the Wires

1,2,3... 1. Use stranded or solid wire. Pin terminals can also be used.

Insert a precision screwdriver in the release button hole.

2. When the screwdriver is pushed firmly to the bottom, the lock will be re­leased and it will be possible to insert the wire into the wire hole.

3. Insert the wire fully into the wire hole (but without any of the wire insulation
in the wire hole) and pull out the screwdriver to lock the wire in place.

B

Terminal block lock lever

B1

A1

B9

A9

Release button hole

N.C. B1

N.C.

B2

N.C.

B3

Input 2 V+

B4

Input 2 −

B5

Input 2 I+

B6

Input 4 V+

B7

Input 4 −

B8

Input 4 I+ B9

A1 N.C.

A2

N.C.

A3

N.C.

A4

Input 1 V+

A5

Input 1−

A6

Input 1 I+

A7

Input 3 V+

A8

Input 3−

A9 Input 3 I+

A

Wire hole

1.

2.

3.

Wire gauge: 0.15 to 1.5 mm

2

(26 to 16 AWG)

10

+1

−0

Pin terminal

22

Wiring Section 3-2

Recommended Components

• The following screwdriver can be used when inserting and removing
wires.
Recommended screwdriver

• Recommended pin terminals and crimp tool

• Contact information for other companies

Allen-Bradley: www.ab.com

Phoenix Contact: www.phoenixcontact.com

Weidmuller: www.weidmuller.com

OMRON 24 Service (Japanese): www.omron24.co.jp

Input Wiring Precautions

Observe the following wiring precautions to optimize the Unit’s functions and
reduce the effects of noise.

• Use twisted-pair shielded wire for the input lines.

• Wire the input lines separately from power lines, such as AC power supply
lines. Do not place input lines and power lines in the same duct.

• Install a noise filter at the power supply input if noise is entering from the
power supply line, which may occur when the Unit is installed near high­frequency equipment or the power supply is shared with a electric welding
machine or electric discharge machines.

Manufacturer Model number Compatible wire Crimp tool

Weidmuller H 0.5/16 D 0.5 mm

2

(20AWG) PZ 6/5

H 0.75/16 D 0.75 mm

2

(18AWG)

H 1.5/16 D 1.25 mm

2

(16AWG)

0.4 mm 2.5 mm

Side Front

Model number Manufacturer

SD 0.4 × 2.5 × 75 Weidmuller

23

SECTION 4

Input Functions and Operating Procedures

This section describes the input functions and operating procedures of the CJ1W-AD04U and CJ1W-AD04U-SL Universal
Input Unit.

4-1 Exchanging Data with the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4-2 Detailed Description of User Settings Area Data . . . . . . . . . . . . . . . . . . . . . . 33

4-2-1 Input Type Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4-2-2 Temperature Unit Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4-2-3 Zero/Span Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4-2-4 Scaling Function Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4-2-5 Sensor Error (Disconnection) Detection and Operation. . . . . . . . . . 36

4-2-6 Process Value Alarm Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4-2-7 Alarm Hysteresis Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4-2-8 Alarm Output ON Delay Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4-2-9 Cold Junction Sensor Error Detection . . . . . . . . . . . . . . . . . . . . . . . 39

4-2-10 Other Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4-3 Expansion Setting Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

24

Exchanging Data with the CPU Unit Section 4-1

4-1 Exchanging Data with the CPU Unit

Outline of Data Exchange

Data is exchanged between the CPU Unit and the CJ1W-AD04U and CJ1W­AD04U-SL Universal Input Units via the Special I/O Unit Area (for data used
to operate the Unit) and the Special I/O Unit words in the DM Area (for data
used for settings).

Operating Data

These CIO Area words contain the process values, alarm outputs, and flags
such as the Sensor Error Flags. The words in the CPU Unit’s Special I/O Unit
Area are allocated by unit number.

Unit Settings

These DM Area words contain various Unit settings. The words allocated to
the Unit in the DM Area are allocated by unit number.

The Unit settings are divided into the following 5 areas.

• Unit values read command

• Address of data range error

• Continuously refreshed area

• Initial settings area

• Expansion Setting Area settings

Special I/O Unit Area

Continuously Refreshed Area

Alarm settings

Zero adjustment value

Initial settings area

Temperature unit setting

Scaling

Expansion Setting Area
settings

Expansion Setting Area

Enable Bit

Expansion Setting Area

address

DM Area

m

100 words

10 words

CJ-series CPU Unit

CJ1W-AD04U/AD04U-SL

Universal Input Unit

I/O refresh

Power ON or Unit restart

Operating Data

Continuously Refreshed Area

(Process values, alarm outputs,

Sensor Error Flags, etc.)

Unit Settings

Unit values read command

Address of data range error

Continuously Refreshed

Area Alarm settings,

zero/span adjustment

values, etc.

Area Refreshed at Restart

Initial values for input types,

scaling, etc.

Expansion Setting Area

settings

I/O refresh

PLC turned ON or

Unit restarted.

m = D20000 + (unit No. × 100)

n = 2000 + (unit No. × 10)

m+1

m+17

m+18

m+2

m+38

m+39

m+40

n

n+1

n+9

to

Expansion Setting Area

Address specified in m+40

Data for Operation

Process Value Alarm

Power ON or Unit restart

I/O refresh

I/O refresh

to

to

to

to

Unit values read command

Address of data range error

Refer to P. 31

Refer to P. 33

25

Exchanging Data with the CPU Unit Section 4-1

Contents of the Operating Data and Unit Settings Areas

The following functions are assigned to data in the CPU Unit’s Special I/O Unit
Area and Special I/O Unit words in the DM Area.

Note If an out-of-range setting is detected in either the continuously refreshed area

or initial settings area, the ERC indicator on the Unit's front panel will light.
The address of the first word containing an invalid setting is stored in the
“address of data range error” word in four digits hexadecimal, as the offset
from word m.
If the first out-of-range setting is in the Expansion Setting Area, the “address
of data range error” offset will be +100 or higher (+100 if the first word in the
Expansion Setting Area is invalid).
When the continuously refreshed area is changed, the ERC indicator will light
and the address will be indicated in the “address of data range error.” The next
time that the power is turned ON or the Unit is restarted, the ERC indicator will
light again and the corresponding out-of-range error address in the initial set­tings area will be displayed.

Data area Function Timing of data

transfer

Operating Data Contains operating data, including

the process values, alarm outputs,
and flags such as the Sensor Error
Flags. The words are in the CPU
Unit's Special I/O Unit Area (part of
the CIO Area).

Cyclic (during I/O
refreshing)

User Settings The following settings are allocated in

the Special I/O Unit words in the DM
Area.

---

Unit values read
command

Reads the Universal Input Unit initial
data to the CPU Unit.

When power is
tur ned ON or Unit is
restarted

Address of data
range error

Contains the address where out-of­range data was detected. (See note.)

Continuously
refreshed area

Contains settings such as the alarm
hysteresis, alarm ON delay, and zero/
span adjustment settings.

Cyclic (during I/O
refreshing), when
power is turned ON,
or Unit is restarted.

Initial settings area Sets initial Unit settings such as the

input type and scaling settings.

When power is
tur ned ON or Unit is
restarted

Expansion Setting
Area settings

Makes Expansion Setting Area set­tings.

26

Exchanging Data with the CPU Unit Section 4-1

Unit Number Settings

The Special I/O Unit Area word addresses and the Special I/O Unit word
addresses in the DM Area that each Universal Input Unit occupies are set by
the unit number switch on the front panel of the Unit.

Special I/O Unit Restart Bits

To restart the Unit operations after changing the contents of the data memory
or correcting an error, turn ON the power to the PLC again or turn the Special
I/O Unit Restart Bit ON and then OFF again.

MACH

No.

×

10

1

×

10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

Switch
setting

Unit

number

Special/O Unit Area

addresses

Special I/O Unit word

addresses in DM Area

0 Unit #0 CIO 2000 to CIO 2009 D20000 to D20099

1 Unit #1 CIO 2010 to CIO 2019 D20100 to D20199

2 Unit #2 CIO 2020 to CIO 2029 D20200 to D20299

3 Unit #3 CIO 2030 to CIO 2039 D20300 to D20399

4 Unit #4 CIO 2040 to CIO 2049 D20400 to D20499

5 Unit #5 CIO 2050 to CIO 2059 D20500 to D20599

6 Unit #6 CIO 2060 to CIO 2069 D20600 to D20699

7 Unit #7 CIO 2070 to CIO 2079 D20700 to D20799

8 Unit #8 CIO 2080 to CIO 2089 D20800 to D20899

9 Unit #9 CIO 2090 to CIO 2099 D20900 to D20999

10 Unit #10 CIO 2100 to CIO 2109 D21000 to D21099

to to to to
N Unit #n CIO 2000 + N × 10 to

CIO 2000 + N × 10 + 9

D20000 + N × 100 to
D20000 + N × 100 + 99

to to to to

95 Unit #95 CIO 2950 to CIO2959 D29500 to D29599

Unit number setting
switches

Bits Unit Number Bits Unit Number Bits Unit Number

A502.00 Unit #0 A503.00 Unit #16 A504.00 Unit #32

A502.01 Unit #1 A503.01 Unit #17 A504.01 Unit #33

A502.02 Unit #2 A503.02 Unit #18 A504.02 Unit #34

A502.03 Unit #3 A503.03 Unit #19 A504.03 Unit #35

A502.04 Unit #4 A503.04 Unit #20 A504.04 Unit #36

A502.05 Unit #5 A503.05 Unit #21 A504.05 Unit #37

A502.06 Unit #6 A503.06 Unit #22 A504.06 Unit #38

A502.07 Unit #7 A503.07 Unit #23 A504.07 Unit #39

A502.08 Unit #8 A503.08 Unit #24 A504.08 Unit #40

A502.09 Unit #9 A503.09 Unit #25 A504.09 Unit #41

A502.10 Unit #10 A503.10 Unit #26 A504.10 Unit #42

A502.11 Unit #11 A503.11 Unit #27 A504.11 Unit #43

A502.12 Unit #12 A503.12 Unit #28 A504.12 Unit #44

A502.13 Unit #13 A503.13 Unit #29 A504.13 Unit #45

A502.14 Unit #14 A503.14 Unit #30 A504.14 Unit #46

A502.15 Unit #15 A503.15 Unit #31 A504.15 Unit #47

27

Exchanging Data with the CPU Unit Section 4-1

Note If the error is not corrected by restarting the Unit or turning the Special I/O

Unit Restart Bit ON and then OFF again, replace the Unit.

Bits Unit Number Bits Unit Number Bits Unit Number

A505.00 Unit #48 A506.00 Unit #64 A507.00 Unit #80

A505.01 Unit #49 A506.01 Unit #65 A507.01 Unit #81

A505.02 Unit #50 A506.02 Unit #66 A507.02 Unit #82

A505.03 Unit #51 A506.03 Unit #67 A507.03 Unit #83

A505.04 Unit #52 A506.04 Unit #68 A507.04 Unit #84

A505.05 Unit #53 A506.05 Unit #69 A507.05 Unit #85

A505.06 Unit #54 A506.06 Unit #70 A507.06 Unit #86

A505.07 Unit #55 A506.07 Unit #71 A507.07 Unit #87

A505.08 Unit #56 A506.08 Unit #72 A507.08 Unit #88

A505.09 Unit #57 A506.09 Unit #73 A507.09 Unit #89

A505.10 Unit #58 A506.10 Unit #74 A507.10 Unit #90

A505.11 Unit #59 A506.11 Unit #75 A507.11 Unit #91

A505.12 Unit #60 A506.12 Unit #76 A507.12 Unit #92

A505.13 Unit #61 A506.13 Unit #77 A507.13 Unit #93

A505.14 Unit #62 A506.14 Unit #78 A507.14 Unit #94

A505.15 Unit #63 A506.15 Unit #79 A507.15 Unit #95

28

Exchanging Data with the CPU Unit Section 4-1

Data Allocation in the User Settings Area

DM Area

The Unit’s various user settings are made in the Special I/O Unit words in the
DM Area. Settings such as the alarm settings and span/zero adjustment val­ues can be changed while the CPU Unit is operating.

Note The unit number switch setting on the front panel of the Unit determines which

words in the Special I/O Unit Area and DM Area words are allocated to each
Universal Input Unit.

DM Allocation Contents

The following table shows the allocation of DM words and bits.

Refer to 4-2 Detailed Description of User Settings Area Data for details.

Allocated DM Area words

D20000 to D20099

D20100 to D20199

D20200 to D20299

D20300 to D20399

D20400 to D20499

D20500 to D20599

D20600 to D20699

D20700 to D20799

D20800 to D20899

D20900 to D20999

D21000 to D21099

D20000 + N × 100 to

D20000 + N × 100 + 99

D29500 to D29599

Special I/O Unit words

in DM Area

CJ-series CPU Unit

CJ1W-AD04U/AD04U-SL

Universal Input Unit

User Settings data

D (m)

Unit values read command

D (m + 1)

Address of data range error

D (m + 2, 6, 10, 14)

Process value H (high limit) alarm setting

D (m + 3, 7, 11, 15)

Process value L (low limit) alarm setting

D (m + 4, 8, 12, 16)

Span adjustment value

D (m + 5, 9, 13, 17)

Zero adjustment value

D (m + 18)

Data direction at sensor error
Temperature unit setting

D (m + 19, 24, 29, 34)

Input type

D (m + 20, 25, 30, 35)

Alarm hysteresis

D (m + 21, 26, 31, 36)

Alarm ON-delay time

D (m + 22, 27, 32, 37)

Process value scaling (upper limit)

D (m + 23, 28, 33, 38)

Process value scaling (lower limit)

D (m + 39)

Expansion Setting Area Enable

D (m + 40)

Expansion Setting Area address

Unit #0

Unit #1

Unit #2

Unit #3

Unit #4

Unit #5

Unit #6

Unit #7

Unit #8

Unit #9

Unit #10

to

Unit #n

Unit #95

(m = 20000 + N × 100)

Power ON

Unit Restart Bit ON

Power ON

Unit Restart Bit ON

I/O refresh

N: Unit No.

Power ON

Unit Restart Bit ON

to

to

to

DM word

(See note 1.)

Bit

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

m Unit default values read command

m + 1 Address of data range error

m + 2 Input 1 Process value H (high limit) alarm setting

m + 3 Input 1 Process value L (low limit) alarm setting

m + 4 Input 1 Span adjustment value

m + 5 Input 1 Zero adjustment value

m + 6 Input 2 Process value H (high limit) alarm setting

m + 7 Input 2 Process value L (low limit) alarm setting

m + 8 Input 2 Span adjustment value

m + 9 Input 2 Zero adjustment value

29

Exchanging Data with the CPU Unit Section 4-1

Note 1. The first address of the Special I/O Unit words allocated to the Unit in the

DM Area is:
m = 20000 + (unit number

× 100)

2. Refer to

4-3 Expansion Setting Area for details on the Expansion Setting

Area.

m + 10 Input 3 Process value H (high limit) alarm setting

m + 11 Input 3 Process value L (low limit) alarm setting

m + 12 Input 3 Span adjustment value

m + 13 Input 3 Zero adjustment value

m + 14 Input 4 Process value H (high limit) alarm setting

m + 15 Input 4 Process value L (low limit) alarm setting

m + 16 Input 4 Span adjustment value

m + 17 Input 4 Zero adjustment value

m + 18 High/low value after sen-

sor error

Not used. Temperature unit setting

Input 4Input 3Input 2Input

1

Input 4Input 3Input 2Input

1

m + 19 Input 1 Input type setting

m + 20 Input 1 Alarm hysteresis

m + 21 Input 1 Alarm ON delay time

m + 22 Input 1 Process value scaling (upper limit)

m + 23 Input 1 Process value scaling (lower limit)

m + 24 Input 2 Input type setting

m + 25 Input 2 Alarm hysteresis

m + 26 Input 2 Alarm ON delay time

m + 27 Input 2 Process value scaling (upper limit)

m + 28 Input 2 Process value scaling (lower limit)

m + 29 Input 3 Input type setting

m + 30 Input 3 Alarm hysteresis

m + 31 Input 3 Alarm ON delay time

m + 32 Input 3 Process value scaling (upper limit)

m + 33 Input 3 Process value scaling (lower limit)

m + 34 Input 4 Input type setting

m + 35 Input 4 Alarm hysteresis

m + 36 Input 4 Alarm ON delay time

m + 37 Input 4 Process value scaling (upper limit)

m + 38 Input 4 Process value scaling (lower limit)

m + 39 Expansion Setting Area Enable (See note 2.)

m + 40 Expansion Setting Area address (See note 2.)

DM word

(See note 1.)

Bit

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

30

Exchanging Data with the CPU Unit Section 4-1

Set Values and Stored Values

Note The ERC indicator on the Unit's front panel will light if an out-of-range setting

is detected. The address of the first word containing an invalid setting is
stored in the “address of data range error” word in four digits hexadecimal, as
the offset from word m, i.e., address m + offset.

Refer to

SECTION 5 Error Processing for details.

Setting Set value or stored value Default Page

Unit values read com­mand

12345 (3039 hex): Transfer initial values from the Input Unit to the

CPU Unit.

0: Transfer allocated DM Area settings from the CPU Unit to the

Input Unit.

0
(0000 hex)

P. 3 9

Address of data range
error

0, or 2 to 40: Indicates address where error occurred. (See note 1.) 0

(0000 hex)

P. 3 9

Process value H (high
limit) alarm setting

−32,768 to 32,767: Sets the PV’s high limit alarm value. 32,767

(7FFF hex)

P. 3 7

Process value L (low
limit) alarm setting

−32,768 to 32,767: Sets the PV’s low limit alarm value. −32,768

(8000 hex)

P. 3 7

Span adjustment value 0 to 32,000: Sets the span adjustment value (×0.0001). 10000

(2710 hex)

P. 3 4

Zero adjustment value −9,999 to 9,999: Sets the zero adjustment value (LSB). 0

(0000 hex)

P. 3 4

High/low value after sen­sor error

0: Switch to high value after sensor error.
1: Switch to low value after sensor error.

0
(0000 hex)

P. 3 6

Temperature unit setting 0: °C

1: °F

0
(0000 hex)

P. 3 3

Input type 0 (0000 hex): Pt100

3 (0003 hex): JPt100
7 (0007 hex): Pt1000
21 (0015 hex): K
23 (0017 hex): J
25 (0019 hex): T
33 (0021 hex): L
36 (0024 hex): R
37 (0025 hex): S
38 (0026 hex): B
48 (0030 hex): 4 to 20 mA
49 (0031 hex): 0 to 20 mA
50 (0032 hex): 1 to 5 V
53 (0035 hex): 0 to 5 V
54 (0036 hex): 0 to 10 V

54
(0036 hex)

P. 3 3

Alarm hysteresis 0 to 9,999: Sets the alarm hysteresis (LSB). 0

(0000 hex)

P. 3 8

Alarm ON delay time 0 to 60: Sets the alarm ON delay in seconds. 0

(0000 hex)

P. 3 8

Process value scaling
(upper limit)

−32,000 to 32,000: Sets the process value scaling (upper limit). 4000

(0FA0 hex)

P. 3 5

Process value scaling
(lower limit)

−32,000 to 32,000: Sets the process value scaling (lower limit). 0

(0000 hex)

P. 3 5

Expansion Setting Area
Enable

0: Disabled
1: Enabled

0
(0000 hex)

P. 3 9

Expansion Setting Area
address

0 to 6,143: Sets the starting address of the Expansion Setting

Area.

0
(0000 hex)

P. 3 9

31

Exchanging Data with the CPU Unit Section 4-1

Data Allocation in the Operating Data Area

The Unit’s Operating Data data is transferred to the CPU Unit every cycle
through the 10 words allocated to the Unit in the Special I/O Unit Area.

Contents of the Operating Data

For the CIO word addresses, n = CIO 2000 + (10 × unit number)

Note Temperatures are represented in 0.1

° increments.

Allocated words
CIO 2000 to CIO 2009
CIO 2010 to CIO 2019
CIO 2020 to CIO 2029
CIO 2030 to CIO 2039
CIO 2040 to CIO 2049
CIO 2050 to CIO 2059
CIO 2060 to CIO 2069
CIO 2070 to CIO 2079
CIO 2080 to CIO 2089
CIO 2090 to CIO 2099
CIO 2100 to CIO 2109

CIO 2000 + N × 10 to

CIO 2000 + N × 10 + 9

CIO 2950 to CIO 2959

Special I/O Unit CIO Area

CJ-series CPU Unit

CJ1W-AD04U/AD04U-SL

Universal Input Unit

The data is

transferred from

the Input Unit to

the CPU Unit

each cycle during

I/O refreshing.

CIO n to
CIO n + 9

Unit #0
Unit #1
Unit #2
Unit #3
Unit #4
Unit #5
Unit #6
Unit #7
Unit #8
Unit #9

Unit #10

Unit #n

Unit #95

(n = 20000 + N × 100)

I/O refresh

N: Unit No.

to

Operating Data

to

to

to

Word Bi t

07 06 05 04 03 02 01 00

n Not used. Process value alarm

Input 4 Input 3 Input 2 Input 1

H
(high
limit)

L
(low
limit)

H
(high
limit)

L
(low
limit)

H
(high
limit)

L
(low
limit)

H
(high
limit)

L
(low
limit)

n + 1 Input 1 process value

n + 2 Input 2 process value

n + 3 Input 3 process value

n + 4 Input 4 process value

n + 5 Not used.

n + 6

n + 7

n + 8

n + 9

Con­ver­sion
Data

Ena­bled
Flag

Not used. Cold Junction Sensor Error Not used. Sensor Error

Input 4Input 3Input 2Input

1

Input 4Input 3Input 2Input

1

32

Exchanging Data with the CPU Unit Section 4-1

Set Values and Stored Values

Note 1. The Conversion Data Enabled Flag is OFF after the PLC is turned ON or

the Unit is restarted. The flag is turned ON when the AD conversion data
becomes stable (approximately2 to 4 s) and remains ON during operation.

2. The sensor error detection function operates when the input type is set to
thermocouple input, platinum resistance thermometer input, 1 to 5 V volt­age input, or 4 to 20 mA current input.

Reading Process Values

Analog input process values are stored for each input number, in CIO words
n+1 to n+4.

For the CIO word addresses, n = CIO 2000 + + (10

× unit number).

Use MOV(021) or XFER(070) to read process values in the user program.

Example 1: In this example, the process value is read from only one input.
(The unit number is 0.)

Note Temperatures are always read as 0.1 times the stored value.

Contents Set Values and Stored Values Page

Process value alarm H (high limit) 0: Process value < Set value

1: Process value ≥ Set value

P. 3 7

L (low limit) 0: Process value > Set value

1: Process value ≤ Set value

Process value 16-bit binary data P. 32

Conversion Data
Enabled Flag (See
note 1.)

0: Data disabled
1: Data enabled

---

Cold Junction Sen­sor Error Flag

0: Normal
1: Error

P. 3 9

Sensor Error Flag
(See note 2.)

0: Normal
1: Error

---

Input types Disconnection detection level

Thermocouple input or platinum
resistance thermometer input

Less than the minimum value in the input
range −20°C or −20°F, or greater than the
maximum value in input range +20°C or
+20°F

1 to 5 V Less than 0.3 V

4 to 20 mA Less than 1.2 mA

0 to 5 V, 0 to 10 V, or 0 to 20 mA Disconnection not detected.

Word Function Stored value

n + 1 Input 1 process value 16-bit binary data

n + 2 Input 2 process value

n + 3 Input 3 process value

n + 4 Input 4 process value

MOV(021)

2001

D00001

The process value in CIO 2001
(input number 1) is read to D00001.

Input condition

33

Detailed Description of User Settings Area Data Section 4-2

Example 2: In this example, the process values are read from multiple inputs.
(The unit number is 0.)

4-2 Detailed Description of User Settings Area Data

4-2-1 Input Type Setting

The input type can be set independently for each input (inputs 1 to 4) to ther­mocouple input, platinum resistance thermometer input, current input (4 to 20
mA or 0 to 20 mA), or voltage input (1 to 5 V, 0 to 5 V, or 0 to 10 V).

After the input types are set in the corresponding DM words (m+19, m+24,
m+29, and m+34), the input type settings will be transferred from the CPU
Unit to the Universal Input Unit the next time that the power is turned ON or
the Unit is restarted.

4-2-2 Temperature Unit Setting

When the input type is set to thermocouple input or platinum resistance ther­mometer input, set the temperature units to Celsius or Fahrenheit.

If the temperature is Celsius, it isn’t necessary to set the temperature units
because the default setting is 0:

°C.

XFER(070)

#0004

2001

D00001

The process values in CIO 2001 to CIO 2004
(input numbers 1 to 4) are read to DM Area
words D00001 to D00004.

Input condition

DM word Function Set values

m + 19 Input 1

input type

0000 (0000 hex): Pt100
0003 (0003 hex): JPt100
0007 (0007 hex): Pt1000
0021 (0015 hex): K
0023 (0017 hex): J
0025 (0019 hex): T
0033 (0021 hex): L
0036 (0024 hex): R
0037 (0025 hex): S
0038 (0026 hex): B

0048 (0030 hex): 4 to 20 mA
0049 (0031 hex): 0 to 20 mA
0050 (0032 hex): 1 to 5 V
0053 (0035 hex): 0 to 5 V
0054 (0036 hex): 0 to 10 V

m + 24 Input 2

input type

m + 29 Input 3

input type

m + 34 Input 4

input type

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input 4

Input 3

Input 2

Input 1

D (m + 18)

Bit

0: °C
1: °F

34

Detailed Description of User Settings Area Data Section 4-2

4-2-3 Zero/Span Adjustment

The zero point and span point can be adjusted for a process value.

The zero adjustment offsets the line plotting values before and after adjust­ment parallel to the original line. The span adjustment changes the slope of
the line (i.e., the gain) around the minimum value in the range.

The zero adjustment value and the span adjustment gain are set in the DM
Area words allocated in the CPU Unit. The settings are applied to the value
after scaling.

These settings are refreshed during operation, so the values can be adjusted
under normal operating conditions.

The Universal Input Units zero/span can be adjusted using a calibration
device, as described below.

1,2,3... 1. Connect the Programming Device to the CPU Unit.

2. The following table shows the appropriate calibration device to connect for
each input type.

3. Turn ON the power to the PLC and calibration device, and wait for the re­quired warm-up time.

4. Input a signal equivalent to 0% from the calibration device, and check the
process value in the CPU Unit’s CIO Area using the Programming Device.

Zero adjustment value

Maximum range

Output data

Maximum range

Minimum range

Before adjustment

Minimum range

Input

After adjustment

Gain for
span
adjustment

Zero/Span Adjustment

Input type Calibration device

Thermocouple input Thermocouple calibrator

Platinum resistance thermometer input Variable resistor

Voltage input Voltage and current generator

Current input Voltage and current generator

35

Detailed Description of User Settings Area Data Section 4-2

If the value is abnormal, change the zero adjustment value in the DM Area,
and adjust the offset (parallel movement) value.

5. Input a signal equivalent to 100% from the calibration device, and check
the process value in the CPU Unit’s CIO Area using the Programming De­vice. If the value is abnormal, change the span adjustment gain value in
the DM Area.

4-2-4 Scaling Function Settings

This function applies only to the voltage or current setting.

The input signal is scaled according to the input signal’s lower limit and upper
limit, and transferred to the CPU Unit as the process value. The lower limits
and upper limits used to scale each input are set in DM Area words m+22 to
m+38, as shown in the following table.

In the following example, an input 1 current input signal of 4 to 20 mA is
scaled to industrial units of 0 to 800 Pa. The input 1 scaling upper limit in
D20022 is set to 0320 hex (800 BCD) and the input 1 scaling lower limit in
D20023 is set to 0000 hex (0 BCD).

Note This function is not applicable to temperatures.

DM word Function Set value

m + 5 Input 1 zero adjustment value −9,999 to −1 (D8F1 to FFFF hex)

0 to 9,999 (0000 to 270F hex)
(set value × LSB)

m + 9 Input 2 zero adjustment value

m + 13 Input 3 zero adjustment value

m + 17 Input 4 zero adjustment value

DM word Function Set value

m + 4 Input 1span adjustment value 0 to 32,000 (0000 to 7D00 hex)

(set value × 0.0001)

m + 8 Input 2 span adjustment value

m + 12 Input 3 span adjustment value

m + 16 Input 4 span adjustment value

DM word Function Set value

m + 22 Input 1 scaling (upper limit) −32,768 (8000 hex) to 32,767 (7FFF hex)

m + 23 Input 1 scaling (lower limit)

m + 27 Input 2 scaling (upper limit)

m + 28 Input 2 scaling (lower limit)

m + 32 Input 3 scaling (upper limit)

m + 33 Input 3 scaling (lower limit)

m + 37 Input 4 scaling (upper limit)

m + 38 Input 4 scaling (lower limit)

Input signal

Industrial unit

4

20 mA

0

Lower limit

Set to 0 (0000 hex).

800 Pa

Upper limit

Set to 800

(

0320 hex).

36

Detailed Description of User Settings Area Data Section 4-2

4-2-5 Sensor Error (Disconnection) Detection and Operation

It is possible to detect a disconnected input circuit if the input type is set to
thermocouple input, platinum resistance thermometer input, 1 to 5 V voltage
input, or 4 to 20 mA current input.

Note 1. The sensor error detection level varies with the zero and span adjustment

values.

2. This function cannot be used when the input type is set to a 0 to 5 V voltage
input, 0 to 10 V voltage input, or 0 to 20 mA current input. Bits 00 to 03 of
n+9 contain the Sensor Error Flags.

Example: In this case, the converted value is read only when analog input 1 is
not disconnected. (The unit number is 0.)

When a sensor error is detected, the process value can be fixed at the highest
value or lowest value.

The allowable range limits are as follows:

• Temperature Input

Upper limit: Upper limit of temperature range +20

°C or +20°F

Lower limit: Lower limit of temperature range

−20°C or −20°F

• Voltage/Current Input

Upper limit: 105%

Lower limit:

−5%

Input type Disconnection detection level

Thermocouple input or platinum resistance
thermometer input

Less than the minimum value in the
input range −20°C or −20°F, or greater
than the maximum value in input
range +20°C or +20°F

1 to 5 V voltage input Less than 0.3 V

4 to 20 mA current input Less than 1.2 mA

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input 4

Input 3

Input 2

Input 1

Word n+9

Bit

If a disconnection is detected in an input, the corresponding flag above is
turned ON. The flag is turned OFF when the disconnection is corrected.

MOV(021)

2001

D00001

Conversion data in CIO 2001
(input number 1) is read to D00001.

2009.00

37

Detailed Description of User Settings Area Data Section 4-2

The high/low value setting is set in DM word m+18, as shown in the following
diagram.

4-2-6 Process Value Alarm Settings

High and low limit alarm values can be set independently for each input’s pro­cess value. One high limit and one low limit can be set.

The Expansion Setting Area can be used to output a limit alarms to an output
device without using the ladder program.

Each input’s high and low alarm set values are set in the DM Area, as shown
in the following table.

Note The settings apply to the process value after zero and span adjustment.

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input 4

Input 3

Input 2

Input 1

D (m + 18)

Bit

0: Fix the process value at highest value when there is a sensor error.
1: Fix the process value at lowest value when there is a sensor error.

DM word Function Set value

m + 2 Input 1 H (high limit) alarm set value −32,768 (8000 hex) to 32,767

(FFFF hex)

m + 3 Input 1 L (low limit) alarm set value

m + 6 Input 2 (high limit) alarm set value

m + 7 Input 2 (low limit) alarm set value

m + 10 Input 3 (high limit) alarm set value

m + 11 Input 3 (low limit) alarm set value

m + 14 Input 4 (high limit) alarm set value

m + 15 Input 4 (low limit) alarm set value

Alarm output (H)

Alarm output (L)

Alarm high limit (H)

Process value input

Alarm low limit (L)

38

Detailed Description of User Settings Area Data Section 4-2

4-2-7 Alarm Hysteresis Settings

Hysteresis values can be set for the process value alarm outputs. Frequent
ON/OFF switching of the alarm output can be eliminated by setting a dead
zone between the alarm output’s start and stop.

4-2-8 Alarm Output ON Delay Settings

A fixed time delay can be set before the output starts for an alarm output (high
or low limit). The ON delay can be set between 1 and 60 s. Each channel’s
ON delay is set independently, but the same ON delay applies to the channel’s
high and low limit alarms. The alarm output will be turned OFF when the pro­cess value goes beyond the alarm output’s range (including the hysteresis
value).

The following example shows the operation of the high limit alarm output.

DM word Function Set value

m + 20 Input 1 alarm hysteresis set value 0 (0000 hex) to 9,999 (270F hex)

m + 25 Input 2 alarm hysteresis set value

m + 30 Input 3 alarm hysteresis set value

m + 35 Input 4 alarm hysteresis set value

Hysteresis

Hysteresis

Alarm output (H)

Alarm output (L)

Alarm high limit (H)

Process value input

Alarm low limit (L)

DM word Function Set value

m + 21 Input 1 alarm ON delay time 0 to 60 s (0000 to 003C hex)

m + 26 Input 2 alarm ON delay time

m + 31 Input 3 alarm ON delay time

m + 36 Input 4 alarm ON delay time

Time

Hysteresis

ON delay time

High limit alarm (H)

Process value input

Alarm output (H)

39

Expansion Setting Area Section 4-3

4-2-9 Cold Junction Sensor Error Detection

If one of the Unit’s built-in cold junction sensors fails, the error is output to the
corresponding bit in CIO word n+9, as shown in the following table.

4-2-10 Other Settings

Unit Values Read Command

The default values in the Universal Input Unit can be read to the CPU Unit
when the power is turned ON or the Input Unit is restarted.

Address of Data Range Error

If an invalid setting is detected in the DM Area’s “continuously refreshed area”
or “initial settings area,” the ERC indicator on the Unit's front panel will light.
The address of the last word containing an invalid setting is stored in the
“address of data range error” word in four digits hexadecimal, as the offset
from word m, i.e., the address is m + offset.

Refer to

5-2 Errors Detected by the Universal Input Unit for details.

4-3 Expansion Setting Area

The Expansion Settings Area can be set to transfer an alarm output directly to
an output device such as an Output Unit (without going through the ladder
program) when the process value exceeds the high or low limit alarm value.

Enabling the Expansion Setting Area

When using the Expansion Setting Area, make the following settings in m+39
and m+40.

Note 1. When specifying the Expansion Setting Area, be sure that it does not over-

lap with other areas that are being used. If areas overlap, the words that
are allocated may be overwritten, resulting in unexpected operation.

2. When specifying the first word in the Expansion Setting Area, be sure that
the Expansion Setting Area does not exceed the end of the data area.

CIO word Bit Contents

CIO n + 9 08 Input 1 cold junction sensor error 0: Normal

1: Error

09 Input 2 cold junction sensor error

10 Input 3 cold junction sensor error

11 Input 4 cold junction sensor error

DM word Function Set value

m + 0 Unit values read command • 12345 (3039 hex):

The Input Unit’s initial values are read
from the Input Unit to CPU Unit words
m+2 to m+40.
(When the transfer is completed, this
word is reset to 0000 hex.)

• 0000 hex or other value besides
12345 (3039 hex):
The data in the allocated words of DM
Area is transferred from the CPU Unit
to the Universal Input Unit

m + 39 Expansion Setting Area Enable 0 hex: Not used.

1 hex: Used.

m + 40 Expansion Setting Area address 0 to 6143 (0000 to 17FF hex)

40

Expansion Setting Area Section 4-3

Set DM word m+39 to 1 (enabling the Expansion Setting Area) and set m+40
to the word address of an output device such as a CJ1W-OC201 Output Unit.

The high and low limit alarm outputs for inputs 1 to 4 are written to CIO n (in
the CPU Unit) every cycle, and simultaneously written to the word specified in
m+40. This way, the high and low limit alarm outputs can be transferred to an
Output Unit or other device without going through the ladder program.

Contents of the Expansion Setting Area

Note These bits contain the same data that is output to bits 00 to 07 of CIO n.

Comparison of Operation with Enabled/Disabled Expansion Setting Area

The following example shows the operation of the alarm outputs when the
process value of input 1 exceeds the high limit alarm value.

• Conditions

Universal Input Unit unit number: 0

Special I/O Unit Area: CIO 2000 to CIO 2009
Special I/O Unit words in DM Area: D20000 to D20099

Output Unit allocation:

CIO 0004 is allocated to the 16 outputs of a CJ1W-OC221 Output Unit.
(This word is not set as the Expansion Setting Area.)

CIO 0005 is allocated to the 8 outputs of a CJ1W-OC201 Output Unit.
(This word is set as the Expansion Setting Area.)

CIO

word

Bit Contents

0 00 Input 1 Low limit alarm output 0: Process value > Set value

1: Process value ≤ Set value

01 Input 1 High limit alarm output 0: Process value < Set value

1: Process value ≥ Set value

02 Input 2 Low limit alarm output 0: Process value > Set value

1: Process value ≤ Set value

03 Input 2 High limit alarm output 0: Process value < Set value

1: Process value ≥ Set value

04 Input 3 Low limit alarm output 0: Process value > Set value

1: Process value ≤ Set value

05 Input 3 High limit alarm output 0: Process value < Set value

1: Process value ≥ Set value

06 Input 4 Low limit alarm output 0: Process value > Set value

1: Process value ≤ Set value

07 Input 4 High limit alarm output 0: Process value < Set value

1: Process value ≥ Set value

08 to 15 Not used. ---

41

Expansion Setting Area Section 4-3

DM words m+39 and m+40 enable the Expansion Setting Area and set it
to CIO 0005.

If the process value of input 1 exceeds the high limit alarm value, CPU
Unit bit CIO 2000.01 is turned ON (1). If the CJ1 PLC’s ladder program
is being executed in RUN mode or MONITOR mode, the input condi­tion of CIO 2000.01 (2) will be reflected in CIO 4.01 (3) and sent to Out­put Unit OC221 (4) where the alarm will be output.

If DM words D20039 and D20040 set CIO 0005 as the Expansion Set­ting Area (5), CIO 5.01 is turned ON directly from the AD04U Input Unit
(6) and the alarm is output externally from Output Unit OC201 (7).

This is how the Expansion Setting Area settings can be used to set
alarm outputs without using the ladder program.

Universal Input Unit

CJ1 CPU Unit

Input 1

CJ1W-OC221
16 outputs
CIO 0004

Unit number
set to 0.

AD04U

CIO 2000

CIO 2009

D20000

D20039

D20040

D20099

Data areas

OC221

OC201

CJ1W-OC201
8 outputs
CIO 0005

Ladder program processing

2000.01

4.01

CIO 0

CIO 4

CIO 5

External alarm
circuit

External alarm
circuit

(1)

(6)

(5)

(2)

(3)

(4)

(7)

Set from Expansion Setting Area.

to

to

to

to

to

Expansion Setting Area
set to CIO 0005.

42

Expansion Setting Area Section 4-3

43

SECTION 5

Error Processing

This section explains how to troubleshoot errors and alarms that occur in the CJ1W-AD04U and CJ1W-AD04U-SL
Universal Input Units.

5-1 Indicators and Error Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-2 Errors Detected by the Universal Input Unit. . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-3 Errors Related to the CPU Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-4 Restarting Special I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-5 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

44

Indicators and Error Flowchart Section 5-1

5-1 Indicators and Error Flowchart

Indicators

If an alarm or error occurs in the Universal Input Unit, the ERC or ERH indica­tors on the front panel of the Unit will light.

5-2 Errors Detected by the Universal Input Unit

RUN

ERC

ERH

AD04U

B1

A1

Front panel of Unit

Indicator Meaning Indicator Operating status

RUN (green) Operating Lit Operating normally.

Not lit Unit has stopped exchanging data with the CPU Unit.

ERC (red) Error detected

by Unit

Lit Alarm has occurred (such as disconnection detection) or initial settings

are incorrect.

Not lit Operating normally.

ERH (red) Error in the

CPU Unit

Lit Error has occurred during data exchange with the CPU Unit.

Not lit Operating normally.

Indicator Contents Probable cause Unit operation Remedy

ERC
(red)

RUN

(green)

Lit Lit Error in continuously

refreshed area

An out-of-range setting was
set in the continuously
refreshed area (in the allo­cated DM Area words) after
the Input Unit started oper­ating normally.

The Unit will continue
operating with the orig­inal continuously
refreshed area data.

Restore the set value
to within the allowable
range. (There is no
need to turn the power
supply OFF and ON or
to restart the Unit.)

Sensor error The input signal exceeded

the upper or lower limit of
the set input range by more
than 20°C or 20°F.

Check the input sensor
to see if it is operating
correctly.

Check the set input
range to see if it is suit­able.

The error will be
cleared automatically
when the input signal
returns to within 20°C
or 20°F of the set
range.

Not lit Error in continuously

refreshed area, initial
settings area, or Expan­sion Setting Area set­tings

An out-of-range setting was
set in the continuously
refreshed area or initial set­tings area (in the allocated
DM Area words).

The Unit will not start
up.

Restore the set value
to within the allowable
range, and then either
turn the power supply
OFF and ON or restart
the Unit.

45

Errors Detected by the Universal Input Unit Section 5-2

Processing and Results in the Continuously Refreshed Area

Processing and Results in the Initial Settings Area

Processing Result LED indicators on Unit Data range error address

stored in DM Area

While the power is ON, an
out-of-range setting is set in
the continuously refreshed
area.

The Unit will continue operat­ing with the original continu­ously refreshed area data.

ERC indicator is lit.
RUN indicator remains lit.

The lowest DM address
where the out-of-range error
occurred is stored, in four
digits hexadecimal, as the
offset value from m (i.e., the
number of added words).

↓

Leave the power ON and
change the setting to a valid
value.

The Unit will operate with the
edited settings in the contin­uously refreshed area.

ERC indicator is lit.
RUN indicator remains lit.

If there is no other error,
0000 hex is stored. (If there
is another error, the offset
value for that DM address is
stored.)

When the PLC is turned ON
or the Unit is restarted with
an error still in effect.

The Unit will not start up. ERC indicator is lit.

RUN indicator is not lit.

The lowest DM address
where the out-of-range error
occurred is stored, in four
digits hexadecimal, as the
offset value from m (i.e., the
number of added words).

↓

When the setting is made
within the allowable range,
and the PLC is turned ON or
the Unit is restarted

The Unit starts up normally. ERC indicator is not lit.

RUN indicator is lit.

If there is no other error,
0000 hex is stored. (If there
is another error, the offset
value for that DM address is
stored.)

Processing Result LED indicators on Unit Data range error address

stored in DM Area

While the power is ON, an
out-of-range setting is set in
the initial settings area.

The Unit will continue operat­ing with the original the initial
settings area data.

ERC indicator is lit.
RUN indicator remains lit.

If there is no error in the set­tings, the value remains
0000 hex. (If there is an
error, the offset value for that
DM address is stored.)

↓

When the PLC is turned ON
or when the Unit is restarted

The Unit will not start up. ERC indicator is lit.

RUN indicator is not lit.

The lowest DM address
where the out-of-range error
occurred is stored, in four
digits hexadecimal, as the
offset value from m (i.e., the
number of added words).

↓

When the setting is made
within the allowable range,
and the PLC is turned ON or
the Unit is restarted

The Unit starts up normally. ERC indicator is not lit.

RUN indicator is lit.

If there is no other error,
0000 hex is stored. (If there
is another error, the offset
value for that DM address is
stored.)

46

Errors Related to the CPU Unit Section 5-3

5-3 Errors Related to the CPU Unit

5-4 Restarting Special I/O Units

To restore operation after the contents of the DM Area have been changed, or
after the cause of an error has been cleared, either turn ON the power supply
to the PLC or turn the Special I/O Unit Restart Bit ON and then OFF again.

• Special I/O Unit Restart Bit

ERH
LED

(red)

RUN

LED

(green)

Contents Probable

cause

Error type Detailed

cause

Input Unit

status

Remedy

Lit Lit Error in data

exchange with
the CPU Unit

During normal
operation, an
I/O bus error,
CPU Unit moni­toring error, or
WDT error
occurred at the
CPU Unit.

I/O bus error A data trans-

mission error
occurred
between the
CPU Unit and
the Universal
Input Unit.

Converted data
becomes 0000

hex.

Turn OFF the
power supply
and check the
installation con­ditions and the
cable connec­tions between
devices. Then
turn the power
back ON.

CPU Unit moni­toring error

The CPU Unit
did not respond

within a fixed
period of time.

Maintains the
status existing
before the
error.

CPU Unit WDT
error

WDT error has
been generated
at CPU Unit.

Changes to
undefined
state.

In PROGRAM
Mode, turn the
power OFF and
then back ON.

Not lit Error in Multi-

channel Ana­log Input Unit’s
unit number or
mounting

Either the unit
number is set
incorrectly or
the Unit is
mounted incor­rectly.

Duplicate Unit
Number

The same unit
number has
been assigned
to more than
one Unit or the
unit number
was set to a
value other
than 00 to 95.

Conversion
does not star t.

Reset the unit
number so that
it will not dupli­cate any other.

Special I/O Unit
Setting Error

A Universal
Input Units reg­istered in the
I/O table is dif­ferent from the
ones actually
mounted.

Check the
mounting posi­tions, and
either mount
the Units
according to
the I/O table or
correct the I/O
table.

Fatal error at CPU Unit after turning ON the power supply Take mea-

sures for CPU
fatal error.

Bits Unit number Bits Unit number Bits Unit number

A502.00 Unit #0 A503.00 Unit #16 A504.00 Unit #32

A502.01 Unit #1 A503.01 Unit #17 A504.01 Unit #33

A502.02 Unit #2 A503.02 Unit #18 A504.02 Unit #34

A502.03 Unit #3 A503.03 Unit #19 A504.03 Unit #35

A502.04 Unit #4 A503.04 Unit #20 A504.04 Unit #36

A502.05 Unit #5 A503.05 Unit #21 A504.05 Unit #37

A502.06 Unit #6 A503.06 Unit #22 A504.06 Unit #38

A502.07 Unit #7 A503.07 Unit #23 A504.07 Unit #39

A502.08 Unit #8 A503.08 Unit #24 A504.08 Unit #40

47

Restarting Special I/O Units Section 5-4

• The conversion data becomes 0000 during restart.

Note If the error is not cleared even after turning the Special I/O Unit Restart Bit ON

and then OFF again, then replace the Unit.

A502.09 Unit #9 A503.09 Unit #25 A504.09 Unit #41

A502.10 Unit #10 A503.10 Unit #26 A504.10 Unit #42

A502.11 Unit #11 A503.11 Unit #27 A504.11 Unit #43

A502.12 Unit #12 A503.12 Unit #28 A504.12 Unit #44

A502.13 Unit #13 A503.13 Unit #29 A504.13 Unit #45

A502.14 Unit #14 A503.14 Unit #30 A504.14 Unit #46

A502.15 Unit #15 A503.15 Unit #31 A504.15 Unit #47

Bits Unit number Bits Unit number Bits Unit number

Bits Unit number Bits Unit number Bits Unit number

A505.00 Unit #48 A506.00 Unit #64 A507.00 Unit #80

A505.01 Unit #49 A506.01 Unit #65 A507.01 Unit #81

A505.02 Unit #50 A506.02 Unit #66 A507.02 Unit #82

A505.03 Unit #51 A506.03 Unit #67 A507.03 Unit #83

A505.04 Unit #52 A506.04 Unit #68 A507.04 Unit #84

A505.05 Unit #53 A506.05 Unit #69 A507.05 Unit #85

A505.06 Unit #54 A506.06 Unit #70 A507.06 Unit #86

A505.07 Unit #55 A506.07 Unit #71 A507.07 Unit #87

A505.08 Unit #56 A506.08 Unit #72 A507.08 Unit #88

A505.09 Unit #57 A506.09 Unit #73 A507.09 Unit #89

A505.10 Unit #58 A506.10 Unit #74 A507.10 Unit #90

A505.11 Unit #59 A506.11 Unit #75 A507.11 Unit #91

A505.12 Unit #60 A506.12 Unit #76 A507.12 Unit #92

A505.13 Unit #61 A506.13 Unit #77 A507.13 Unit #93

A505.14 Unit #62 A506.14 Unit #78 A507.14 Unit #94

A505.15 Unit #63 A506.15 Unit #79 A507.15 Unit #95

48

Troubleshooting Section 5-5

5-5 Troubleshooting

The following tables explain the probable causes of troubles that may occur,
and the countermeasures for dealing with them.

Conversion Data Does Not Change

Value Does Not Change as Intended

Conversion Values are Inconsistent

Probable cause Countermeasure Page

The span adjustment value is set to 0. Set the span adjustment value to a value other than 0. P. 34

The input type setting is incorrect. Check and correct the input type setting. P. 33

An input device is faulty, input wiring is
incorrectly wired, or wiring is discon­nected.

Check whether the input value is changing.
Check for faulty or disconnected wiring.
Check whether a sensor error has been detected.

P. 19, P, 36

The minimum and maximum values for
process value scaling are either the
same or are set too close together.

Set the minimum and maximum process value scaling values cor­rectly.

P. 3 5

Probable cause Countermeasure Page

The zero/span adjustment values are
incorrect.

Check and correct the zero/span adjustment settings. P. 34

There is an error in the scaling set­tings.

Check and correct the scaling settings. P. 35

A resistance thermometer’s input wir­ing is incorrect.

Check and correct the input wiring. P. 19

The compensating wire is too long and
affecting operation.

Use a thicker thermocouple compensating wire. ---

The input type or process value scal­ing setting is incorrect.

Check the input type or process value scaling settings and correct if
necessary.

P. 33, P. 35

Cold junction compensation is not
operating.

Check the Cold Junction Sensor Error Flag. P. 39

No compensating wire is being used,
or another type of compensating wire
is being used.

Use the correct thermocouple compensating wire. ---

The input wiring is faulty. (The polarity
is incorrect in the thermocouple or
compensating wire.)

Check and correct the input wiring. P. 19

Probable cause Countermeasure Page

The input signals are being affected by
external noise.

Change the connection paths of the input signal lines. (Separate
them from sources of noise or use shielded twisted cable.)

Insert a 0.01-µF to 0.1-µF ceramic capacitor or film capacitor
between the input’s (+) and (−) terminals.

---

The process value is being scaled
beyond the Unit's resolution.

Reduce the process value’s scaling value. P. 35

49

Appendix A

Dimensions

CJ1W-AD04U

CJ1W- AD04U-SL

Terminal Block Dimensions

MACH

No

.

AD04U

RUN
ERC
ERH

B1 A1

x10

1

x10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

2.7

90

3

1

2.

7

65

8

9

8.2

6.

4

17.

5

7.6

2

74.77

MACH

No

.

AD04U

RUN
ERC
ERH

B1 A1

x10

1

x10

0

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

2.7

90

3

1

2.

7

65

8

5

50

Dimensions Appendix A

51

Appendix B

Supplementary Explanations of Functions

The following supplements the explanation given in 1-1 Features and Functions.

Changing Set Values during Output of Process Value Alarm

H (High Limit) Alarms

When the alarm set value is raised while the alarm output is ON, the alarm output will be turned OFF when the
following condition is satisfied.

Input value < (alarm set value after change

− hysteresis)

The alarm output will first turn OFF when the input value falls below the set value (with the hysteresis included).

L (Low Limit) Alarms

When the alarm set value is lowered while the alarm output is ON, the alarm output will be turned OFF when
the following condition is satisfied.

Input value > (alarm set value after change + hysteresis)

When the hysteresis part alone of the input value is greater than the set value, the alarm output will turn OFF
for the first time.

Example: H Limit Alarms

ON

OFF

Hysteresis

ON

OFF

Hysteresis

ON

OFF

Hysteresis

Input value (Process value,
rate-of-change value,
instantaneous value)

H alarm set value

With present value at this point, alarm output turns ON.

Alarm set value further raised.

Alarm set value further raised.

H alarm set value

H alarm set value

Input value (Process value,
rate-of-change value,
instantaneous value)

Input value (Process value,
rate-of-change value,
instantaneous value)

With present value at this point, alarm output remains ON.

With present value at this point, alarm output turns OFF.

52

Supplementary Explanations of Functions Appendix B

Alarm Operation when Upper Limit Is Less Than Lower Limit

When setting the process value’s alarm set values, the high and low limit values can be set freely, regardless of
which value is larger.

Example: H < L

The alarm output operation is determined solely by the relative sizes of the input value (scaling value) and
alarm set values, as shown below.

H Limit Alarms

When the input value is greater than the alarm set value, the alarm output is turned ON.

L Limit Alarms

When the input value is less than the alarm set value, the alarm output is turned ON.

Alarm Output Operation when Falling Back from Alarm
Condition Before Alarm-ON Delay Time Elapses

If inputs fall back from the alarm-ON condition (including hysteresis) before the alarm-ON delay time has
elapsed, the alarm output will not turn ON.

ON

OFF

Low limit (L) set value

Hysteresis

Low limit (L) alarm output

High limit (H) set value

Time

Time

ON

OFF

High limit (H) alarm output

Time

ON

OFF

Set value

Alarm output

Time

Time

Alarm-ON delay time

Process value or rate-of-change value

Hysteresis

Falling back from ON condition

Will not turn ON

53

Supplementary Explanations of Functions Appendix B

Setting Process Value Scaling with Negative Gain

With process value scaling in industrial units, a negative gain can be set by reversing the maximum and
minimum values in the range.

The following values can be set for an input signal of 4 to 20 mA: Maximum process value in range = 0,
minimum process value in range = 4000.

Alarm Operation during Process Value Scaling with Negative
Gain

During process value scaling with negative gain, the alarm operates on the process value after scaling, and not
on the input signal. Consequently, the operation is the same as for normal bias, as shown below.

H Limit Alarms

When the input value is greater than the alarm set value, the alarm output is turned ON.

L Limit Alarms

When the input value is less than the alarm set value, the alarm output is turned ON.

Example: If the maximum process value in the range is 0 and minimum process value in the range is 4,000 for
an input signal of 4 to 20 mA, and if the H (high limit) alarm set value is 3,000, the alarm output will turn ON
when the process value is greater than 3,000 (when the input signal is less than 8 mA).

4200 (105%)

4000 (100%)

0 (0%)

−200 (−5%)

3.2 mA 4 mA 20 mA 20.8 mA

Input signal

Process value (stored data)

Process value scaling with negative gain

54

Supplementary Explanations of Functions Appendix B

Switching to the High or Low Value when Input Disconnection
Occurs during Process Value Scaling with Negative Gain

If an input becomes disconnected during process value scaling with negative gain, either the maximum (high)
or minimum (low) process value can be set.

If the process value’s High/low value after sensor error setting is set to high, the maximum process value will be
set when the input is disconnected.

If the process value’s High/low value after sensor error setting is set to low, the minimum process value will be
set when the input is disconnected.

4200 (105%)

4000 (100%)

3000 (75%)

0 (0%)

−200 (−5%)

3.2 mA 4 mA 20 mA 20.8 mA

Input signal

Process value (stored data)

Process value scaling with negative gain

When process value is greater than 3,000,
output turns ON.

When input signal is less than 8 mA, output turns ON.

4200 (105%)

4000 (100%)

0 (0%)

−200 (−5%)

3.2 mA 4 mA 20 mA 20.8 mA

Input signal

Process value (stored data)

Process value scaling with negative gain

If the high value is set, the maximum
value of 4200 will be specified when an
input is disconnected.

If the low value is set, the minimum value
of −200 will be specified when an input is
disconnected.

55

Appendix C

Data Coding Tables

@@: Unit number

DM

word

Setting contents

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

D2@@00

D2@@00
D2@@01
D2@@02
D2@@03
D2@@04
D2@@05
D2@@06
D2@@07
D2@@08
D2@@09
D2@@10
D2@@11
D2@@12
D2@@13
D2@@14
D2@@15
D2@@16
D2@@17
D2@@18 0 0

D2@@19
D2@@20
D2@@21
D2@@22
D2@@23
D2@@24
D2@@25
D2@@26
D2@@27
D2@@28
D2@@29
D2@@30
D2@@31
D2@@32
D2@@33
D2@@34
D2@@35
D2@@36
D2@@37
D2@@38

56

Data Coding Tables Appendix C

D2@@39 0 0 0
D2@@40

DM

word

Setting contents

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

57

Revision History

A manual revision code appears as a suffix to the catalog number on the front cover of the manual.

The following table outlines the changes made to the manual during each revision. Page numbers refer to the
previous version.

Date Revised content

01 December 2006 Original production

02 December 2007 Changed product name to Universal Input Unit.

Page xvii: Added warning.
Page xix: Added two paragraphs at bottom of page.
Page xx: Corrected voltage for Low Voltage Directive to 1,500.
Page 2: Corrected top figure.
Page 11: Removed “JIS, IEC” from input type specification.
Page 15: Corrected model number and figure.
Page 19: Corrected figure and added notes.
Page 24: Corrected model number in first sentence.
Page 38: Corrected descriptions of settings below top figure.

Cat. No. W466-E1-02

Revision code