Datasheet ZEN Datasheet (OMRON)

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Cat. No. Z183-E1-01A

OPERATION MANUAL

ZEN Programmable Relay

Operation Manual

Produced May 2003

Terms and Conditions of Sale

1. Offer; Acceptance. These terms and conditions (these "Terms") are deemed part of all quotes, agreements, purchase orders, acknowledgments, price lists, catalogs, manuals, brochures and other documents, whether electronic or in writing, relating to the sale of products or services (collectively, the "Products by Omron Electronics LLC and its subsidiary companies (“Omron objects to any terms or conditions proposed in Buyer’s purchase order or other documents which are inconsistent with, or in addition to, these Terms.

2. Prices; Payment Terms. out notice by Omron. Omron reserves the right to increase or decrease prices on any unshipped portions of outstanding orders. Payments for Products are due net 30 days unless otherwise stated in the invoice.

3. Discounts. sent to Buyer after deducting transportation charges, taxes and duties, and will be allowed only if (i) the invoice is paid according to Omron’s payment terms and (ii) Buyer has no past due amounts.

Omron, at its option, may charge Buyer 1-1/2% interest per month or

4. Interest. the maximum legal rate, whichever is less, on any balance not paid within the stated terms.

. Omron will accept no order less than $200 net billing.

5. Orders

6. Governmental Approvals. costs involved in, obtaining any government approvals required for the importation or sale of the Products.

. All taxes, duties and other governmental charges (other than general

7. Taxes real property and income taxes), including any interest or penalties thereon, imposed directly or indirectly on Omron or required to be collected directly or indirectly by Omron for the manufacture, production, sale, delivery, importation, consumption or use of the Products sold hereunder (including customs duties and sales, excise, use, turnover and license taxes) shall be charged to and remitted by Buyer to Omron.

8. Financial. to Omron, Omron reserves the right to stop shipments or require satisfactory security or payment in advance. If Buyer fails to make payment or otherwise comply with these Terms or any related agreement, Omron may (without liability and in addition to other remedies) cancel any unshipped portion of Products sold hereunder and stop any Products in transit until Buyer pays all amounts, including amounts payable hereunder, whether or not then due, which are owing to it by Buyer. Buyer shall in any event remain liable for all unpaid accounts.

9. Cancellation; Etc. unless Buyer indemnifies Omron against all related costs or expenses.

10. Force Majeure resulting from causes beyond its control, including earthquakes, fires, floods, strikes or other labor disputes, shortage of labor or materials, accidents to machinery, acts of sabotage, riots, delay in or lack of transportation or the requirements of any government authority.

11. Shipping; Delivery. a.Shipments shall be by a carrier selected by Omron; Omron will not drop ship

except in “break down” situations.

b.Such carrier shall act as the agent of Buyer and delivery to such carrier shall

constitute delivery to Buyer;

c. All sales and shipments of Products shall be FOB shipping point (unless oth-

erwise stated in writing by Omron), at which point title and risk of loss shall pass from Omron to Buyer; provided that Omron shall retain a security inter-

est in the Products until the full purchase price is paid; d.Delivery and shipping dates are estimates only; and e.Omron will package Products as it deems proper for protection against nor-

mal handling and extra charges apply to special conditions.

Any claim by Buyer against Omron for shortage or damage to the

12. Claims. Products occurring before delivery to the carrier must be presented in writing to Omron within 30 days of receipt of shipment and include the original transportation bill signed by the carrier noting that the carrier received the Products from Omron in the condition claimed.

13. Warranties Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMEN T, MERCHANTABIL-

All prices stated are current, subject to change with-

Cash discounts, if any, will apply only on the net amount of invoices

Buyer shall be responsible for, and shall bear all

If the financial position of Buyer at any time becomes unsatisfactory

Orders are not subject to rescheduling or cancellation

. Omron shall not be liable for any delay or failure in delivery

Unless otherwise expressly agreed in writing by Omron:

. (a) Exclusive Warranty. Omron’s exclusive warranty is that the

. OMRON MAKES NO WARRANTY OR REPRESENTATION,

”). Omron

ITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR

INTENDED USE. Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the Products or otherwise of any intellectual property right. (c) Buyer Remedy gation hereunder shall be, at Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty, repair, indemnity or any other claims or expenses 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. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice, recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above warranty. See http://oeweb.omron.com or contact your Omron representative for published information.

14. Limitation on Liability; Etc FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR P RODUCTION OR COM MERCIAL LOSS IN AN Y WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.

15. Indemnities

16. Property; Confidentiality.

17. Export Controls.

18. Miscellaneous

. Buyer shall indemnify and hold harmless Omron Companies and their employees from and against all liabilities, losses, claims, costs and expenses (including attorney's fees and expenses) related to any claim, investigation, litigation or proceeding (whether or not Omron is a party) which arises or is alleged to arise from Buyer's acts or omissions under these Terms or in any way with respect to the Products. Without limiting the foregoing, Buyer (at its own expense) shall indemnify and hold harmless Omron and defend or settle any action brought against such Companies to the extent based on a claim that any Product made to Buyer specifications infringed intellectual property rights of another party.

sive property of Omron Companies and Buyer shall not attempt to duplicate it in any way without the written permission of Omron. Notwithstanding any charges to Buyer for engineering or tooling, all engineering and tooling shall remain the exclusive property of Omron. All information and materials supplied by Omron to Buyer relating to the Products are confidential and proprietary, and Buyer shall limit distribution thereof to its trusted employees and strictly prevent disclosure to any third party.

licenses regarding (i) export of products or information; (iii) sale of products to “forbidden” or other proscribed persons; and (ii) disclosure to non-citizens of regulated technology or information.

and no course of dealing between Buyer and Omron shall operate as a waiver of rights by Omron. (b) Assignment without Omron's written consent. (c) Law. law of the jurisdiction of the home office of the Omron company from which Buyer is purchasing the Products (without regard to conflict of law principles). (d) Amendment Buyer and Omron relating to the Products, and no provision may be changed or waived unless in writing signed by the parties. (e) Severability sion hereof is rendered ineffective or invalid, such provision shall not invalidate any other provision. (f) Setoff against the amount owing in respect of this invoice. (g) Definitions herein, “including nies” (or similar words) mean Omron Corporation and any direct or indirect subsidiary or affiliate thereof.

. OMRON COMPANIES SHALL NOT BE LIABLE

Any intellectual property in the Products is the exclu-

Buyer shall comply with all applicable laws, regulations and

. (a) Waiver. No failure or delay by Omron in exercising any right

. Buyer may not assign its rights hereunder

. These Terms constitute the entire agreement between

. Buyer shall have no right to set off any amounts

” means “including without limitation”; and “Omron Compa-

Certain Precautions on Specifications and Use

1. Suitability of Use. Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases but the following is a non-exhaustive list of applications for which particular attention must be given: (i) Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this document. (ii) Use in consumer products or any use in significant quantities. (iii) 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. (iv) Systems, machines and equipment that could present a risk to life or property. Please know and observe all prohibitions of use applicable to this Product. NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE H AS BEEN DESIGNED TO

ADDRESS THE RISKS, AND THAT THE OMRON’S PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN TH E OVERALL EQUIPMENT OR SYSTEM.

2. Programmable Products. user’s programming of a programmable Product, or any consequence thereof.

3. Performance Data and other materials 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 user must correlate it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.

4. Change in Specifications changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to confirm actual specifications of purchased Product.

5. Errors and Omissions. checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions.

Omron Companies shall not be responsible for the

. Data presented in Omron Company websites, catalogs

. Product specifications and accessories may be

Information presented by Omron Companies has been

. Omron’s sole obli-

These Terms are governed by the

. If any provi-

. As used

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.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could

result in death or serious injury.

!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.

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 operation of the product.

1,2,3... 1. Indicates lists of one sort or another, such as procedures, check-

lists, etc.

Precaution Indicates precautionary information that should be heeded in using

the ZEN.

RUN PARAMETE R SET CL OCK

LANGUAGE

▲▼

Indicates that the display (the word “LANGUAGE” in this case) is flashing. In this manual, this state is described by saying that the “flashing cursor” is at the word “LANGUAGE”. In this state it is possible to change settings and the position of the cursor.

LANGUAGE

Indicates that the display (the letter “H” in this case) is flashing in reverse video. In this manual, this state is described by saying that

ENGLISH

the “highlighted cursor” is at the word “H”. In this state it is not possible to change settings but the cursor can be changed to the flashing cursor by pressing the OK button.

Indicate the buttons that needs to be pressed in operating procedures. Press each button once.

Indicate buttons that needs to be pressed in operating procedures. Press one of the buttons once or more.

Ó OMRON, 2003

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.

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii

2 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

3 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

5 Operating Mode at Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix

6 Memory Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

7 Version Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

SECTION 1

Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Features and Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1-3 Display Screen and Basic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-4 Memory Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1-5 Allocating I/O Bit Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1-6 Preparations for Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

SECTION 2

Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

2-1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2-2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SECTION 3

Programming and Operating Methods . . . . . . . . . . . . . . . . . . . . .49

3-1 Selecting Display Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3-2 Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3-3 Creating Ladder Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3-4 Confirming Ladder Program Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3-5 Correcting Ladder Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3-6 Using Timers (T) and Holding Timers (#). . . . . . . . . . . . . . . . . . . . . . . . . . . 67

3-7 Using Counters (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3-8 Using Weekly Timers (@) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

3-9 Using Calendar Timers (*). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

3-10 Analog Inputs (Analog Comparators (A)). . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3-11 Comparing Timer/Counter Present Values Using Comparators (P) . . . . . . . 79

3-12 Displaying Messages (Display Bits (D)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3-13 Using Button Switches (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

vii

TABLE OF CONTENTS

SECTION 4

Special Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

4-1 Protecting Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

4-2 Stabilizing Input Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

4-3 Changing Backlight Automatic Cutout Time. . . . . . . . . . . . . . . . . . . . . . . . . 92

4-4 Adjusting LCD Screen Contrast. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

4-5 Setting Summertime. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

4-6 Reading System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

SECTION 5

Optional Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

5-1 Mounting Battery Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

5-2 Using Memory Cassettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

5-3 Connecting the ZEN Support Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

SECTION 6

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

6-1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

6-2 Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

6-3 Deleting Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Appendices

A Product Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

B Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

C Ladder Program Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

D Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

E Allocations and Setting Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

viii

About this Manual:

This manual describes the installation and operation of the ZEN Programmable Relay and includes the sections described below.

Please read this manual carefully and be sure you understand the information provided before attempting to install or operate the ZEN. Be sure to read the precautions provided in the following section.

Precautions provides general precautions for using the ZEN and related devices.

Section 1 gives an outline of the ZEN, including example applications, the system configurations and basic operations.

Section 2 explains how to mount and wire the ZEN CPU Units and Expansion I/O Units.

Section 3 explains how to create and edit ladder programs and how to use the timers, counters, comparators, display function and buttons switches.

Section 4 describes how to protect ladder programs, stabilize inputs, make LCD screen adjustments, and make summer time settings.

Section 5 describes how to mount Battery Units, use Memory Cassettes, and how to connect the ZEN Support Software.

Section 6 lists the error messages and provides probable causes and countermeasures for troubleshooting.

The following two manuals are provided for the ZEN Programmable Relay. Refer to them as required in operation.

Manual Contents Cat. No.

ZEN Programmable Relay Operation Manual

ZEN Support Software Operation Manual

ZEN specifications, functions, and operating methods.

Installation and operating procedures for the ZEN Support Software

Z183

Z184

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

result in personal 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.

PRECAUTIONS

This section provides general precautions for using the ZEN Programmable Relay.

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

1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii

2 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

2-1 Circuit Design and Ladder Programming . . . . . . . . . . . . . . . . . . . xiii

2-2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

2-3 Wiring and Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

2-4 I/O Connections and Startup Precautions . . . . . . . . . . . . . . . . . . . xiv

2-5 Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv

2-6 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

2-7 Transportation and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

3 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4-1 Applicable Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4-2 Concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4-3 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

4-4 Relay Output Noise Reduction Methods . . . . . . . . . . . . . . . . . . . . xvii

5 Operating Mode at Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix

6 Memory Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

7 Version Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

7-1 Application Precautions for Differences between Versions. . . . . . xxii

7-2 CPU Units Covered in this Manual . . . . . . . . . . . . . . . . . . . . . . . . xxiii

Safety Precautions 1

1 Safety Precautions

!WARNING Never attempt to disassemble any Units while power is being

supplied. Doing so may result in serious electrical shock or electrocution.

!WARNING Never touch the I/O terminals, computer connector, Expansion

Unit connector, or Battery Unit connector while power is being supplied. Doing so may result in serious electrical shock or electrocution.

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

including the following items, to ensure safety in the system if an abnormality occurs due to malfunction of the ZEN or another external factor affecting the ZEN 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 ZEN will turn OFF all outputs when its self-diagnosis function detects any error. As a countermeasure for such errors, external safety measures must be provided to ensure safety in the system.

• The ZEN outputs may remain ON or OFF due to deposition or burning of the output relays or destruction of the output transistors. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the system.

• Provide double safety mechanisms to handle incorrect signals that can be generated by broken signal lines or momentary power interruptions.

!WARNING Do not short the battery terminals or charge, disassemble, heat,

or incinerate the battery. Do not subject the battery to strong shocks. Doing any of these may result in leakage, rupture, heat generation, or ignition of the battery. Dispose of any battery that has been dropped on the floor or otherwise subjected to excessive shock. Batteries that have been subjected to shock may leak if they are used.

!Caution Tighten the AC power supply terminal block screws to the torque

specified in the manual. Loose screws can result in fire or faulty operation.

xii

Application Precautions 2

2 Application Precautions

Observe the following precautions when using the ZEN.

2-1 Circuit Design and Ladder Programming

• Provide external interlock circuits, limit circuits, and other safety circuits in addition to any provided within the ZEN to ensure safety.

• The output relays or the output transistors may remain ON due to faults in internal circuits such as output relays or output transistors. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the system.

• Always turn ON power to the ZEN before turning ON power to the I/O circuits. If the ZEN power supply is turned ON after the I/ O power supply, temporary errors may result in operation.

• The life of the output relays is largely affected by the switching conditions. Confirm the operation of the system under actual operating conditions and set the switching frequency to ensure that adequate performance will be provided. Insulation faults and burning in the ZEN may result if relays are used after their performance has deteriorated.

2-2 Installation

• Install the ZEN according to instructions in the operation manual. Improper installation may cause faulty operation.

• Do not install the ZEN in locations subject to excessive noise. Malfunction may occur.

• Do not allow the ZEN to fall during installation.

• Be sure that all the mounting screws on the ZEN and Expansion I/O Unit are tightened to the torque specified in the manual. Incorrect tightening torque may result in malfunction.

• Use with the cover of the computer connector mounted. Using without the cover may result in malfunction due to dust or other foreign matter.

• Be sure that the DIN rail mounting levers, Expansion I/O Units, Memory Cassettes, Battery Units, cable connectors, and other items with locking devices are properly locked into place. Improper locking may result in malfunction.

2-3 Wiring and Connections

• Use the wires specified in this manual when wiring. Use straight crimp terminals when connecting loose wires.

xiii

Application Precautions 2

• Provide circuit breakers and other safety measures to provide protection against shorts in external wiring.

• Use separate wiring ducts for signal wires from those used for power supply and high-voltage lines.

• Always check polarity when connecting cables.

• Leave the label attached to the Unit when wiring. Removing the label may result in malfunction if foreign matter enters the Unit.

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

• Tighten the terminal block screws to the torque specified in the manual.

• Wire the ZEN according to instructions in the operation manual. Improper installation may cause faulty operation.

2-4 I/O Connections and Startup Precautions

• Use the Units only with the power supplies and voltages specified in the operation manual. Other power supplies and voltages may damage the Units.

• Take measures to stabilize the power supply to conform to the rated supply if it is not stable.

• Do not apply voltages exceeding the rated input voltage to input circuits. The input circuits may be destroyed.

• Do not apply voltages exceeding the maximum switching capacity to output circuits. The output circuits may be destroyed.

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

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

2-5 Handling

• Use, store, and transport the ZEN under the limits given for general specifications in this manual.

• Do not attempt to disassemble, repair, or modify any Units. Any attempt to do so may result in malfunction, fire, or electric shock.

• Always turn OFF the power supply to the ZEN before attempting any of the following.

xiv

• Assembling the ZEN.

• Attaching or removing the Expansion I/O Unit.

• Connecting or disconnecting any cables or wiring.

Application Precautions 2

• Attaching or removing the Memory Cassette.

• Attaching or removing the Battery Unit.

• 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.

• Using the button switches.

• Changing bit status or parameter settings.

• Before touching a Unit, be sure to first touch a grounded metallic object in order to discharge any static build-up.

• Do not pull on the cables or bend the cables beyond their natural limit. Doing either of these may break the cables.

• Do not place objects on top of the cables or other wiring lines. Doing so may break the cables.

• Do not short the battery terminals or charge, disassemble, heat, or incinerate the battery. Do not subject the battery to strong shocks. Doing any of these may result in leakage, rupture, heat generation, or ignition of the battery. Dispose of any battery that has been dropped on the floor or otherwise subjected to excessive shock. Batteries that have been subjected to shock may leak if they are used.

• Abide by all local ordinances and regulations when disposing of the ZEN.

2-6 Maintenance

• When replacing parts, be sure to confirm that the rating of a new part is correct.

• When replacing a Unit, transfer to the new Unit and confirm all settings for clock data, internal holding bits, holding timers, and counter before starting operation again.

2-7 Transportation and Storage

• Use special packaging boxes when transporting the ZEN and do not subject it to excessive shock or vibration or drop it during shipment.

• Store the ZEN in the following temperature and humidity ranges without condensation or icing.

Model Ambient

temperature

LCD –20 to 75°C 10% to 90%

LED –40 to 75°C

Humidity

Operating Environment Precautions 3

3 Operating Environment Precautions

Do not operate the control system in the following places.

• Where the ZEN is exposed to direct sunlight.

• Where the ambient temperature or humidity is beyond the specified ranges.

• Where the ZEN may be affected by condensation due to radical temperature changes.

• Where there is any corrosive or inflammable gas.

• Where there is excessive dust, saline air, or metal powder.

• Where the ZEN is affected by vibration or shock.

• Where any water, oil or chemical may splash on the ZEN.

• Any other place with conditions beyond those specified in the general specifications.

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.

4 Conformance to EC Directives

4-1 Applicable Directives

•EMC Directives

• Low Voltage Directive

4-2 Concepts

EMC Directives

OMRON devices that comply with EC Directives also conform to the related EMC standards so that they can be more easily built into other devices or the overall machine. The actual products have been checked for conformity to EMC standards (see the following note). Whether the products conform to the standards in the system used by the customer, however, must be checked by the customer.

EMC-related performance of the OMRON devices that comply with EC Directives will vary depending on the configuration,

xvi

Conformance to EC Directives 4

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): EN61000-6-2 EMI (Electromagnetic Interference): EN50081-2

(Radiated emission: 10-m regulations)

Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 VAC and 75 to 1,500 VDC meet the required safety standards for the ZEN (EN61131-2).

4-3 Conformance to EC Directives

The ZEN complies with EC Directives. To ensure that the machine or device in which the ZEN is used complies with EC Directives, the ZEN must be installed as follows:

1,2,3... 1. The ZEN must be installed within a control panel.

2. You must use reinforced insulation or double insulation for the DC power supplies used for the communications power supply and I/ O power supplies.

3. ZEN models complying with EC Directives also conform to the Common Emission Standard (EN50081-2). 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 complies with EC Directives.

4-4 Relay Output Noise Reduction Methods

The ZEN conforms to the Common Emission Standards (EN50081-2) of the EMC Directives. However, noise generated by relay output switching may not satisfy these Standards. In such a case, a noise filter must be connected to the load side or other appropriate countermeasures must be provided external to the ZEN.

Countermeasures taken to satisfy the standards vary depending on the devices on the load side, wiring, configuration of machines, etc. Following are examples of countermeasures for reducing the generated noise.

xvii

Conformance to EC Directives 4

Countermeasures

(Refer to EN50081-2 for more details.) Countermeasures are not required if the frequency of load switching

for the whole system with the ZEN included is less than 5 times per minute.

Countermeasures are required if the frequency of load switching for the whole system with the ZEN included is more than 5 times per minute.

Countermeasure Examples

When switching an inductive load, connect an surge protector, diodes, etc., in parallel with the load or contact as shown below.

Circuit Current Characteristic Required element

AC DC

CR method Yes Yes If the load is a relay or

Powe r supply

Inductive

load

solenoid, there is a time lag between the moment the circuit is opened and the moment the load is reset.

If the supply voltage is 24 or 48 V, insert the surge protector in parallel with the load. If the supply voltage is 100 to 200 V, insert the surge protector between the contacts.

The capacitance of the capacitor must be 1 to 0.5 contact current of 1 A and resistance of the resistor must be 0.5 to 1 age of 1 V. These values, however, vary with the load and the characteristics of the relay. Decide these values from experiments, and take into consideration that the capacitance suppresses spark discharge when the contacts are separated and the resistance limits the current that flows into the load when the circuit is closed again.

The dielectric strength of the capacitor must be 200 to 300 V. If the circuit is an AC circuit, use a capacitor with no polarity.

W per contact volt-

mF per

xviii

Operating Mode at Startup 5

Circuit Current Characteristic Required element

AC DC

Diode method No Yes The diode connected in

Powe r supply

Varistor method Yes Yes The varistor method pre-

Powe r supply

Inductive

load

Inductive

load

parallel with the load changes energy accumulated by the coil into a current, which then flows into the coil so that the current will be converted into Joule heat by the resistance of the inductive load.

This time lag, between the moment the circuit is opened and the moment the load is reset, caused by this method is longer than that caused by the CR method.

vents the imposition of high voltage between the contacts by using the constant voltage characteristic of the varistor. There is time lag between the moment the circuit is opened and the moment the load is reset.

If the supply voltage is 24 or 48 V, insert the varistor in parallel with the load. If the supply voltage is 100 to 200 V, insert the varistor between the contacts.

The reversed dielectric strength value of the diode must be at least 10 times as large as the circuit voltage value. The forward current of the diode must be the same as or larger than the load current.

The reversed dielectric strength value of the diode may be two to three times larger than the supply voltage if the surge protector is applied to electronic circuits with low circuit voltages.

---

5 Operating Mode at Startup

The operating mode at startup depends on the model and the presence of a user program as shown in the following table.

User

program

LCD model (with LCD and operation buttons)

LED model (with LED and no operation buttons)

In CPU No Yes No Yes

In Memory

Cassette

No No Yes Yes

STOP mode

RUN mode with program in CPU

RUN mode with program in Memory Cassette

RUN mode with program in CPU

xix

Memory Backup 6

6 Memory Backup

The ladder program and settings are stored in EEPROM and thus will not be lost even if the power supply is turned OFF for an extended period of time (e.g., 2 days at 25°C). The status of the following data, however, is backed up by an internal capacitor, and may be lost if power is turned OFF for an extended period of time: ON/OFF status of holding bits (H), holding timers (#), and counters (C) and the prevent value areas. For models equipped with a clock/calendar, the time and date may be reset. Always reconfirm system operation before restarting operation after the power has been turned OFF for an extended period of time. We recommend that a Battery Unit be (optional) connected in any system in which power may be interrupted for an extended period of time.

Version Upgrades 7

7 Version Upgrades

The following table shows the relationship between the versions and functionality of the ZEN CPU Unit and ZEN Support Software

Date of

upgrade

January 2002

May 2003

System

software

version

Ver. 1.10 The following functions were added to the CPU

Ver. 2.00 • The number of timers, counters, weekly tim-

Units with LCD displays.

• A Clear Display function

• A Day/Month display object (DAT1)

ers, calendar timers, and display areas was increased from 8 to 16 each and the number of holding timers was increased from 4 to 8. (See note 2.)

• A new CPU Unit with 20 I/O points was added. (See note 2.)

• The input circuits of CPU Units with DC power supply were made compatible with both PNP and NPN.

• A password input was added to the memory all clear function for CPU Units with LCDs.

Note The model numbers of CPU Units with

CPU Unit Support Software

Main changes

The following functions were added to version

2.00 (ZEN-SOFT01-V2).

• Support for changes to display function

• Simulation function

• Improvements to functions, operating procedures, and displays

The following functions were added to version

3.00 (ZEN-SOFT01-V3).

• Support for V1 CPU Units with 20 I/O points

• Support for V1 CPU Units with 10 I/O points

10 or 20 I/O points end in “-V1.”

Note 1. The number of the system software version in the CPU Unit is not

related to the model number. The system software version of CPU Units with LCDs can be read by selecting SYSTEM INFO from the OTHER Menu. “V02.00” will be displayed as the system software version for V1 CPU Units.

xxi

Version Upgrades 7

2. Memory Area Comparison between V1 and Pre-V1 CPU Units

Area V1 CPU Units Pre-V1 CPU Units

ZEN-10C@@@-@-V1 ZEN-20C@@@-@-V1 ZEN-10C@@@-@

CPU Unit input bits I0 to I5 (6 bits) I0 to Ib (12 bits) I0 to I5 (6 bits)

CPU Unit output bits Q0 to Q3 (4 bits) Q0 to Q7 (8 bits) Q0 to Q3 (4 bits)

Timers T0 to Tf (16 bits) T0 to T7 (8 bits)

Holding timers #0 to #7 (8 bits) #0 to #3 (4 bits)

Counters C0 to Cf (16 bits) C0 to C7 (8 bits)

Weekly timers @0 to @f (16 bits) @0 to @f7(8 bits)

Calendar timers

Displays D0 to Df (16 bits) D0 to D7 (8 bits)

Work bits M0 to Mf (16 bits)

Holding bits H0 to Hf (16 bits)

Expansion I/O Unit input bits

Expansion I/O Unit output bits

Analog comparators A0 to A3 (4 bits)

Comparators P0 to Pf (16 bits)

0 to f (16 bits) 0 to 7 (8 bits)

X0 to Xb (12 bits)

Y0 to Yb (12 bits)

7-1 Application Precautions for Differences between

Versions

Memory Cassette Compatibility

Be aware of the following restrictions when using a Memory Cassette containing a program that was stored from a CPU Unit with a different version of system software.

Version of CPU Unit used to

write the Memory Cassette

Ver. 1.00 OK OK OK OK

Ver. 1.10 Restrictions

Ver. 2.00 (V1 CPU Units)

10 I/O points Restrictions

20 I/O points Restrictions

Version of CPU Unit used to read the Memory Cassette

Ver. 1.00 Ver. 1.10 Ver. 2.20 (V1 CPU Units)

10 I/O points 20 I/O points

(See note 1.)

(See notes 1, 2, and 3.)

OK OK OK

Restrictions (See note 2.)

Restrictions (See notes 2 and 3.)

OK OK

Restrictions (See note 3.)

xxii

Note 1. The new display functions (display clear: -CD@ and day/month

display: DAT1) cannot be used and will be ignored.

Version Upgrades 7

2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and Displays (i.e., only half of each).

3. Only 6 inputs and 4 outputs can be used in the CPU Unit I/O bits. Any others will be ignored.

Compatibility of Programs Depending on Support Software Version

CPU Unit system software Support Software

Ver. 1.00

ZEN-SOFT01

Ver. 1.00 OK OK Restrictions

Ver. 1.10 Restrictions

Ver. 2.00 (V1 CPU Units)

10 I/O points Restrictions

20 I/O points Not applicable. Not applicable. OK

(See note 1.)

(See notes 1 and

2.)

Ver. 2.00

ZEN-SOFT01-V2

OK Restrictions

Restrictions (See note 2.)

Ver. 3.00

ZEN-SOFT01-V3

(See notes 1 and

2.)

(See note 2.)

Note 1. The new display functions (display clear: -CD@ and day/month

display: DAT1) cannot be used and will be ignored.

2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and Displays (i.e., only half of each).

7-2 CPU Units Covered in this Manual

The material in this manual is based on the memory areas of the V1 CPU Units. If you are using a pre-V1 CPU Unit, the sizes of some of the memory areas will be different. Refer to page xxii for details.

Also, the I/O circuits and I/O terminal arrangements for CPU Units for DC power supply different between V1 and pre-V1 CPU Units, as described in the following table. Refer to page 38 for details

CPU Unit I/O circuits

V1 CPU Units With CPU Units for DC power supply, the common is

Pre-V1 CPU Units The negative size of the power supply for input circuits

separated from the power supply circuit in the I/O circuits, and a COM (common) terminal is provided for input terminals. This enables connecting devices with sourcing outputs (+ common) in addition to connecting devices with sinking outputs (

is connected internally to the negative side of the DC power supply. The input circuits can thus be used only with a

- common.

- common).

xxiii

Version Upgrades 7

xxiv

SECTION 1

Outline

This section gives an outline of the ZEN, including example applications, the system configurations and basic operations.

1-1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Features and Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1-2-1 Features and System Configuration. . . . . . . . . . . . . . . . . . . . . . . . 8

1-2-2 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1-3 Display Screen and Basic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-3-1 Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-3-2 Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1-4 Memory Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1-5 Allocating I/O Bit Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1-6 Preparations for Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Outline Section 1-1

1-1 Outline

The ZEN Programmable Relay is an extremely small programmable controller that provides 10 programmable I/O points (6 inputs and 4 outputs) to enable low-cost, small-scale automation. There is also a new model that provides 20 programmable I/O points (12 inputs and 8 outputs) along with 16 of each of the following: Timers, counters, displays, etc.

In this manual, the ZEN Programmable Relay is referred to as merely the “ZEN.”

The ZEN comes in basically two types: LCD and LED.

• LCD Type: LCD screen and operation buttons

• LED Type: No LCD screen or operation buttons

The following pages provide a few examples of the way the ZEN meets a wide variety of application needs.

Low-cost, Small-scale Automatic Control

One CPU Unit provides 12 inputs and 8 outputs (with CPU Unit with 20 I/O points).

Water-supply facilities in apartments, lighting control in

Easy Operation with an Inexpensive Controller

Ladder programming is possible directly from a LCD-type CPU Unit. Ladder programs can be easily copied to low-cost LED-type CPU Units by using Memory Cassettes (optional).

Outline Section 1-1

Smaller Control Panels

The ZEN is very small at 90 x 70 x 56 mm (H x W x D) and mounts essentially anywhere.

Note Dimensions are 90 x 122.5 x 56 mm (H x W x D) for CPU Units

with 20 I/O points.

70 mm

90 mm

CPU Unit with 10 I/O points

Less Assembly and Wiring Time Required for Control Panels

Simple one-touch DIN Track mounting. Built-in timers and counters so only power supply and I/O circuit wiring required.

Solid wires can be easily connected using only a screwdriver.

Refer to page 33.

Future System Expandability

I/O capacity can be expanded to up to 24 inputs and 20 outputs by connecting 3 Expansion I/O Units. Refer to page 9 and 33.

CPU Unit

12 inputs/8outputs + (4 inputs/4outputs)

Expansion I/O Units (up to 3)

´ 3

Outline Section 1-1

Power Failure Countermeasures

EEPROM backs up the program and system settings data when no power is supplied to the ZEN.

Use a Battery Unit (optional) to back up work bits, holding timers, counters, and date/time data.

Refer to page 96.

Battery Unit

Easy Saving and Copying of Programs

Use an optional Memory Cassette to easily save and copy programs. Refer to page 97.

Ladder program data/settings.

Memory Cassette

Programming and Monitoring from a Personal Computer

Windows-based ZEN Support Software is available and provides a complete simulation function.

Refer to page 99.

ZEN Support Software (CD-ROM)

Greater Switching Capacity

The output contacts have 8-A switching capacity (250 VAC). All contacts are independent (for CPU Units with 10 I/O points).

Outline Section 1-1

Refer to page 45.

8 A max.

250 V

AC Inputs

For CPU Units with AC power supply inputs, 100 to 240 VAC can be directly connected.

Refer to page 35.

100 to 240 VAC

Easy Program Design

There are 4 different operations that can be set for bit outputs. Selfholding bits also can be easily programmed.

Refer to page 58.

-[Q0 Normal operation

-SQ0 Set operation

-RQ0 Reset operation

-AQ0 Alternate operation

Circuit protector

Complicated Timers without Additional Programming

Any of the 16 timers support 4 types of operation and 3 timing ranges.

There are also 8 built-in holding timers that hold data during power interruptions.

Refer to page 67.

TIM

ON delay OFF delay One-shot pulse Flashing pulse

0.01 to 99.99 s 1 s to 99 min 59 s 1 min to 99 h 59 min

Outline Section 1-1

Incremental and Decremental Counters

There are 16 built-in counters that can be switched between incrementing and decrementing. Use Comparators to enable programming multiple outputs from a counter. Counters: Refer to page 70. Comparators: Refer to page 79.

CNT

D R

Control number of cars entering and leaving a car park.

Season- or Day-dependent Operating Times

CPU Units with built-in calendar and clock functions have 16 weekly timers and 16 calendar timers. Seasonal control is possible using calendar timers and day/time control is possible with weekly timers.

Weekly timers: Refer to page 72. Calendar timers: Refer to page 74.

MO FR

−

SA SU

−

For gardens, parks, and recreational ponds.

Direct Analog Inputs

CPU Units with DC power supply inputs have 2 analog input points (0 to 10 V) and 4 analog comparators.

Refer to page 75.

Temperature control for hot houses and tanks. Prevent freezing of swimming pools.

Outline Section 1-1

Easier Maintenance

Use the display function in LCD-type CPU Units to display user-set messages, the date, time, or other data. Button switches can also be used as input contacts. Applications include usage as a simple display operation panel.

Refer to page 82.

Longer Backlight for Dark Situations

The automatic cutout time for the backlight for LCD-type CPU Units can be set to 2, 10, or 30 minutes, or set to operate continuously. With the display function, the backlight can also be set to turn ON when a message is displayed.

Refer to page 92.

Prevent Chattering and Noise-related Malfunctions

Set the input filters to extend the filter timer and prevent malfunctions.

Refer to page 90.

Filter timer ON

Features and Part Names Section 1-2

Exporting Systems Overseas

Display for LCD-type CPU Units is available in 6 languages. A Summertime function also supported. Changing display language: Refer to page 50. Summertime settings: Refer to page 93.

ENGLISH JAPANESE GERMAN FRENCH ITALIAN SPANISH

Programming Security

Programs can be protected by setting a password.

Refer to page 88.

PASSWORD

RUN

3 9

0000

5 4

1-2 Features and Part Names

1-2-1 Features and System Configuration

The ZEN is small but has a wide range of functions and is easy to use. The ZEN facilitates small-scale automatic control.

LCD-type CPU Unit Features

• Simple button-operated programming.

• Highly visible, backlit LCD.

• Adjustable automatic cutout time for the backlight.

• Adjustable contrast for the LCD screen.

• Six-language display.

• Display function for user-set messages (4 lines x 12 characters), time, or timer, counter, or analog-converted value displays.

• Button switches allowing operation buttons to be used as input contacts.

• Built-in weekly and calendar timers to allow simple seasonal, daily, or time-based operation.

Features and Part Names Section 1-2

LCD-type and LED-type CPU Unit Features

• Both 100 to 240-VAC and 24-VDC power supply models available.

• Built-in analog comparator for temperature control and other analog applications (provided on CPU Units with DC power supply inputs, two analog inputs 0 to 10 V).

• Input filter settings to prevent noise-related malfunctions for both CPU Units and Expansion I/O Units.

• Program and settings data backed up on built-in EEPROM.

• Programming using ladder diagrams.

• Password function to protect programs.

Work bits, holding timer data, counter data, and date/time data will be backed up during long-term power supply interruptions if a Battery Unit (optional) is mounted.

ZEN-BAT01 Battery Unit

ZEN-ME01 Memory Cassette

Programs can be saved and copied by using a Memory Cassette (optional).

LCD/LED-type CPU Unit

With CPU Units with 10 I/O points, up to 18 inputs and 16 outputs are possible if 3 Expansion I/O Units are connected.

With CPU Units with 20 I/O points, up to 24 inputs and 20 outputs are possible if 3 Expansion I/O Units are connected.

Expansion I/O Units (up to 3 can be connected)

Personal computer connecting cable

ZEN-SOFT01-V3 ZEN Support

Software

Relay outputs have large a switching capacity (8A at 250 VAC), while transistor outputs can switch 0.5 A at 24 VDC. All outputs have independent contacts except for CPU Units with 20 I/O points, which have one common for each 2 outputs for 4 of the 8 outputs.

Programs can be created, edited, saved, and printed, and operation can be simulated using the ZEN Support Software (optional).

Features and Part Names Section 1-2

1-2-2 Part Names

LCD-type CPU Units with 10 I/O Points (with LCD and Operation Buttons)

Power supply Inputs Outputs Input

100 to 240 VAC, 50/60 Hz

24 VDC 24 VDC Yes ZEN-10C1DR-

100 to 240 VAC

6 Relays 4 Yes No Yes ZEN-10C1AR-

Not isolated

Transistors

filter

Analog

inputs

Calen-

dar/time

Model number

A-V1

D-V1

ZEN-10C1DTD-V1

Left Side

Battery Unit connector (Remove the seal to connect the Battery Unit.)

Power supply terminals

LCD

Front

Input terminals

Operation buttons

ZEN Support Software connector

ZEN Support Software connector (also used for Memory Cassette.)

(also used for Memory Cassette.) Remove this cover to

Output terminals

Remove this cover to connect Expansion Unit.

connect Expansion Unit.

Right Side

Expansion Unit connector cover.

Features and Part Names Section 1-2

LCD-type CPU Units with 20 I/O Points (with LCD and Operation Buttons)

Power supply Inputs Outputs Input

100 to 240 VAC, 50/60 Hz

100 to 240 VAC

12 Relays 8 Yes No Yes ZEN-20C1AR-

Not isolated

24 VDC 24 VDC Yes ZEN-20C1DR-

Transistors

filter

Analog

inputs

Calen-

dar/time

Model num-

ber

A-V1

D-V1

ZEN-20C1DTD-V1

Left Side

LCD

Battery Unit connector (Remove the seal to connect the Battery Unit.)

Power supply terminals

20C1AR-A-V1

Input terminals

ZEN Support Software connector (also used for Memory Cassette.)

I6I7I8I9IaI

Q6Q5Q

Output terminals

Operation buttons

Right Side

Expansion Unit connector cover.

Remove this cover to connect Expansion Unit.

Features and Part Names Section 1-2

LED-type CPU Units with 10 I/O Points (without LCD/Operation Buttons)

The ZEN is also available in an LED type that provides full operating functionality, but no direct programming input. The ZEN Support Software or a Memory Cassette containing a program is required.

Power supply Inputs Outputs Input

100 to 240 VAC, 50/60 Hz

24 VDC 24 VDC Yes ZEN-10C2DR-

100 to 240 VAC

6 Relays 4 Yes No No ZEN-10C2AR-

Not isolated

Transistors

filters

Analog

inputs

Calen-

dar/time

Model number

A-V1

D-V1

ZEN-10C2DTD-V1

Indicators

Left Side Front

Battery Unit connector (Remove the seal to connect the Battery Unit.)

Name Color Meaning

POWER Green Lit Power supplied

RUN Green Lit Operating (RUN)

ERROR Red Lit Error

Power supply terminals

Personal computer connector (also used for Memory Cassette.)

LED indicators

Not lit No power

Not lit Stopped (STOP)

Not lit Normal

Input terminals

Output ter minals

Right Side

Expansion I/O Unit connector cover

Remove this cover to connect Expansion I/O Unit.

Features and Part Names Section 1-2

LED-type CPU Units with 20 I/O Points (without LCD/Operation Buttons)

Power supply Inputs Outputs Input

filters

100 to 240 VAC, 50/60 Hz

100 to 240 VAC

12 Relays 8 Yes No No ZEN-20C2AR-

Not isolated

24 VDC 24 VDC Yes ZEN-20C2DR-

Transistors

Analog

inputs

Calen-

dar/time

Model num-

ber

A-V1

D-V1

ZEN-20C2DTD-V1

Left Side Front

Battery Unit connector (Remove the seal to connect the Battery Unit.)

Indicators

Right Side

Power supply terminals

20C2AR-A-V1

LED indicators

Input terminals

Q4Q6Q5Q

Personal computer connector (also used for Memory Cassette.)

Output ter minals

I6I7I8I9IaI

Remove this cover to connect Expansion I/O Unit.

Name Color Meaning

POWER Green Lit Power supplied

Not lit No power

RUN Green Lit Operating (RUN)

Not lit Stopped (STOP)

ERROR Red Lit Error

Not lit Normal

Expansion I/O Unit connector cover

Features and Part Names Section 1-2

Differences between LCD- and LED-type CPU Units

Item LCD type LED type

AC power

supply

Program editing, parameter settings, operation monitoring

Operating mode switching Yes (Also possible with ZEN

Calendar and clock function Yes No

Bits Input, output,

Settings Display language Yes (Also possible with ZEN

Expansion I/O Unit connection Yes Yes

Memory Cassette functions

Battery Unit connection Yes Yes

ZEN Support Software connection

work, holding bits

Timer, holding timer, counter

Weekly timer, calendar timer

Analog comparator

Timer/counter comparator

Button switches Yes Yes

Display function Yes No

Backlight cutout time

Input filters Yes (Also possible with ZEN

Password Yes (Also possible with ZEN

ZEN to Memory Cassette transfer

Memory Cassette to ZEN transfer

Memory Cassette initialization

Yes (Also possible with ZEN Support Software.)

Support Software)

Ye s Ye s

Ye s N o

No Yes No Yes

Yes Yes (ZEN Support Software

Support Software.)

Yes (Also possible with ZEN Support Software.)

Support Software.)

Ye s N o

Yes Yes (Automatic transfer when

Ye s N o

Ye s Ye s

DC power

supply

AC power

supply

Yes (ZEN Support Software required.)

required.)

Yes (ZEN Support Software required.)

power is turned ON.)

DC power

supply

Features and Part Names Section 1-2

Expansion I/O Units

No. of I/O

Points

8 I/O 100 to 240 VAC, 50/60 HzIsolated 4 Relays 4 ZEN-8EAR

24 VDC Isolated 4 Relays 4 ZEN-8EDR

4 inputs 100 to 240 VAC, 50/60 HzIsolated 4 --- --- ZEN-4EA

24 VDC Isolated 4 --- --- ZEN-4ED

4 outputs --- --- --- Relays 4 ZEN-4ER

Inputs Outputs Model

Transistors

4 ZEN-8EDT

Left Side

Expansion Unit connector Output terminals

Front

Input terminals

Right Side

Expansion Unit connector cover.

Remove this cover to connect Expansion I/O Unit.

Display Screen and Basic Operations Section 1-3

1-3 Display Screen and Basic Operations

The display screen for the LCD-type CPU Units and the operations of the buttons are shown below.

LCD

Icon Meanings

ESC Button OK Button

RUN ERR

▲▼

Icon Meaning

RUN Displayed while in RUN mode.

ERR Indicates an error.

▲

▼

Displayed when there is a higher-level menu or ladder program line than the one currently displayed.

Displayed when there is a lower-level menu or ladder program line than the one currently displayed.

Displayed when a password has been set.

ALT ButtonDEL Button

Cursor Buttons

Display Screen and Basic Operations Section 1-3

Operation Button Names and Operations

Button Function

Menus Writing ladder program Setting parameters Button switch

DEL --- Deletes inputs, outputs, con-

ALT --- Switches between normally

Up Moves the cur-

Down B2 ON

Left --- Moves the cursor right and

Right B4 ON

ESC Returns to the

OK Selects the

sor up and down.

previous screen.

menu item at the cursor position.

nection lines, and blank lines.

open and normally closed conditions.

Changes to connection line write mode.

Inserts a line.

Moves the cursor up and down.

Selects bit types and functions.

left.

Cancels the setting and returns to the previous operation.

Confirms the setting. Confirms the setting. B1 ON

--- B6 ON

--- B7 ON

Moves the cursor up and down.

Changes numerals and parameters.

Moves the cursor right and left.

Cancels the setting and returns to the previous operation.

(See85.)

B5 ON

B3 ON

B0 ON

Display Screen and Basic Operations Section 1-3

1-3-1 Screens

STOP Mode

When power is turned ON

When Expansion I/O Unit is connected.

Display Function Screen

(Userspecified message)

Note: The display will be blank if the display function is not being used.

RUN Mode

When power is turned ON

When Expansion I/O Unit is connected.

Display Function Screen

(Userspecified message)

Note: The display will be blank if the display function is not being used.

STOP Mode

PROGRAM RUN PARAMETER SET CLOCK

PARAMETER SET CLOCK LANGUAGE OTHER

RUN Mode

MONITOR STOP PARAMETER SET CLOCK

RUN

PARAMETER SET CLOCK LANGUAGE OTHER

RUN

Display Screen and Basic Operations Section 1-3

Display Screens

Main Screen

Day

When One or More Expansion I/O Units Are Connected

Operating mode

Time (min:s)

Day display

SU: Sunday MO: Monday TU: Tuesday WE: Wednesday TH: Thursday FR: Friday

SA: Saturday

CPU input bit (I) status ( : OFF/ : ON)

I0 I1 I2 I3 I4 I5

CPU output bit (Q) status (@: OFF/ : ON)

@@@@

Q0 Q1 Q2 Q3

Expansion I/O Unit input bit (X) status ( : OFF/ : ON)

X0 X1 X2 X3 X4 X5 X6 X7 X8 X9

Xa Xb

Expansion I/O Unit output bit (Y) status (@: OFF/ : ON)

@@@@@@@@@@

Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9

CPU Units with 10 I/O points

@@@@

Q0 Q1 Q2 Q3

Ya Yb

I0 I1 I2 I3 I4 I5

Ia Ib

CPU Units

I6 I7 I8 I9

@@@@

Q4 Q5 Q6 Q7

Note: The display depends on the number of input points on the connected Expansion I/O Units.

Note: The display depends on the number of output points on the connected Expansion I/O Units.

with 20 I/O points

CPU Units with 20 I/O points

Display Screen and Basic Operations Section 1-3

Menu Screen Configuration

RUN Mode

MONITOR STOP PARAMETER SET CLOCK

RUN

▼

STOP Mode Ladder Program Edit Screen

PROGRAM RUN PARAMETER SET CLOCK

▼

Date and Time Settings (Refer to page 51.)

PROGRAM RUN PARAMETER SET CLOCK

▼

Display Language Settings (Refer to page 50.)

RUN PARAMETER SET CLOCK LANGUAGE

▲▼

Ladder Monitor Screen

The ON/OFF status of input bits can be checked by monitoring the ladder program.

Switches to STOP mode. The operation status of the timers, counters, and analog

comparators can be monitored and the settings changed during operation. Refer to page 25.

EDIT PROG DELETE PROG C ASSETTE

(Refer to page 23.)

Creates and edits ladder program.

Deletes ladder program and parameters.

Memory Cassette Operation (Refer to page 97.)

SAVE LOAD ERASE

Note: Displayed only when a Memory Cassette is mounted.

Transfers programs between ZEN and the Memory Cassette and initializes the Memory Cassette.

Switches to RUN mode. Changes the settings for timers, counters, and analog comparators.

(Refer to page 28.)

SET CLOCK SUMMER TIME

LANGUAGE

ENGLISH

The display language can be changed. English, Japanese, German, French, Italian, and

Spanish

SET CLOCK yy/mm/dd 00/01/01 00:03(SA)

Set when shipping to countries that use summer time. (Refer to page 93.)

Sets the date and time.

Other Settings

PARAMETER SET CLOCK LANGUAGE OTHER

▲

PASSWORD CONTRAST BACK LIGHT INPUT FILTER

INPUT FILTER MODEM INI NODE NO SYSTEM INF

Other settings can be made. Refer to the following page for details.

▼

▲

Display Screen and Basic Operations Section 1-3

Other Submenus

PASSWORD

CONTRAST

BACK LIGHT INPUT F ILT ER

▼

INPUT FILTER MODEM INI NODE NO SYSTEM IN F

▲

Setting Passwords (Refer to page 88.)

PASSWORD

Set a password when you want to protect programs from being read. The password

0000

setting range is 0000 to 9999.

Adjusting Contrast (Refer to page 93.)

CONTRAST

Adjust the contrast when the LCD screen is faint and difficult to read or when it is too dark

to read. There are 5 contrast levels.

Changing Cutout Time for Backlight (Refer to page 92.)

BACKLIG HT

Set the automatic cutout time for the backlight in the LCD screen.

2min

2 min, 10 min, 30 min, Always ON

Setting Input Filters (Refer to page 90.)

INNER EXP1 EXP2 EXP3

Set the input filters to ON or OFF for the CPU Unit or Expansion I/O Units. Set to ON when noise or chattering may affect operation.

“EXP1” to “EXP3” will be displayed depending on the number of Expansion I/O Units connected.

Do not use. For future system expansion.

Setting Node Number (Refer to page 99.)

NODE NO

Set to the node number specified using the ZEN Support Software.

Reading System Information (Refer to page 94.)

U02.00 030218 INT:I06004 E X1:I04004

EX2 :I0 4000 EX3 :I00004 RMT:I00000 LCD: YES

▲▼

RMT:I00000 LC D:YES RT C:YES ADC:YES

▲

Read system information, such as the CPU Unit software version or the date it was created, the number of I/O points on the CPU

▼

Unit or the Expansion I/O Units, and whether or not LCD, RTC, or analog input functions are supported.

Display Screen and Basic Operations Section 1-3

1-3-2 Basic Operation

Menu Selection Example

Main menu display

RUN PARAMETER SET CLOCK

LANGUAGE

▲▼

Flashing cursor

Use the Up/Down Buttons to move the cursor.

LANGUAGE

ENGLISH

Highlighted cursor

LANGUAGE

ENGLISH

Flashing cursor

LANGUAGE

GERMAN

LANGUAGE SET? OK /ESC GERMAN

RUN PARAMETER KALENDER

SPRACHE

▲▼

Press the OK Button to select the flashing menu. The settings will flash on a reversed display.

Press the OK Button to change from a highlighted cursor to a flashing cursor. Settings can now be changed.

Use the Up/Down Buttons to change the setting.

Use the Up Button to select GERMAN.

A confirmation message will be displayed asking if you want to change to German display.

Press the OK Button to change from English to German.

RUN PARAMETER SET CLOCK

LANGUAGE

▲▼

Press the ESC Button to cancel the change and return to the previous screen.

Display Screen and Basic Operations Section 1-3

Example Operation in the Ladder Program Edit Screen

Select

Program/ Edit.

Line No. at

Highlighted cursor

cursor

The highlighted cursor will appear in the initial write position. During highlighted cursor display, the cursor can be moved to the input or output write positions.

Up/Down Buttons: Move the highlighted cursor up and down.

Left/Right Buttons: Move the highlighted cursor Left/Right.

Press the OK Button at the input write position to display the input default setting IO and the normally open condition symbol. “I” will flash.

• Flashing Cursor at the I Position Up/Down Buttons: Change the bit type. Right Button: Moves the flashing cursor to the right. OK Button: Sets the bit type and moves the flashing cursor to the bit address position.

• Flashing Cursor at the 0 Position Up/Down Buttons: Change the bit address. OK Button: Completes the writing of the bit.

• Switching between Normally Open and Normally Closed Conditions You can use the ALT Button to switch between the N.O. and N.C. conditions, regardless of the position of the flashing cursor.

When the first input has been written, the highlighted cursor moves to the next input position.

Use the above procedure to enter program input conditions in series.

When writing serial inputs, the connecting line between inputs is drawn automatically.

Display Screen and Basic Operations Section 1-3

Press the ALT Button with the highlighted cursor in the input writing position to change the cursor to a flashing left arrow to enable connecting lines to be drawn.

Up/Down Buttons: Draw vertical connecting lines.

Left/Right Buttons: Draw horizontal connecting lines.

Press the Right Button twice to draw a line to the output bit. The cursor will change to a

▼

highlighted cursor at the output bit write position.

Press the OK Button at the output bit write position to display the default output Q0. Q will flash.

• Flashing Cursor at the Q (Bit Type) Position Up/Down Buttons: Change the type of output Right/Left Buttons: Move the flashing cursor. OK Button: Sets the bit type and moves the flashing cursor to the bit address position.

• Flashing Cursor at the (Additional Output Function) Position Up/Down Buttons: Selects the additional output function OK Button: Sets the additional output function and moves the flashing cursor to the bit address position.

• Flashing Cursor at the 0 (Bit Address) Position Up/Down Buttons: Select the bit address OK Button: Completes the output write.

Press the OK Button to complete the bit write

and to move the highlighted cursor to the first input position ON the next line.

Press the ESC Button to complete the writing of the ladder program and to return to the menu screen.

Display Screen and Basic Operations Section 1-3

Example Parameter Settings Screen Operation

Select

Parameters

on menu screen.

(1) Selecting Parameters to Display

When Parameter is selected, the parameter settings are displayed.

Press the OK Button to change the highlighted cursor to a flashing cursor.

(2) Setting and Changing Parameters

Use the Up/Down Buttons to select another timer.

When multiple parameters of the same type have been selected, use the Up/Down But- tons to scroll through the numbers.

Press the Left Button to switch to another type, move the flashing cursor to the bit type position and use the Up/Down Buttons to select the bit type.

Move the flashing cursor to the bit type position and use the Up/Down Buttons to select another bit type.

Use the Left/Right Buttons to move the highlighted cursor to the parameter to be set.

Press the OK Button to confirm the set position. The cursor will change to a flashing cursor.

Use the Up/Down Buttons to set the parameter.

Press the OK Button to confirm the setting.

Display Screen and Basic Operations Section 1-3

Use the Left/Right or Up/Down Buttons to move the highlighted cursor to the parameter to be set.

Press the OK Button to confirm the set position. The cursor will change to a flashing cursor.

Use the Left/Right Buttons to select the digit to be set.

Use the Up/Down Buttons to change the value of each digit.

Press the OK Button to confirm the setting.

Press the ESC Button to complete the settings.

Note If the ESC Button is pressed while ladder program or parameter

settings are being input, the input to that point will be canceled and the settings will return to the original settings.

Memory Areas Section 1-4

1-4 Memory Areas

I/O, Work, and Internal Holding Bits

Name Ty pe Bit

CPU Unit input bits

Expansion I/O Unit input bits

Button switches

Analog comparator bits

Comparator bits

CPU Unit output bits

Expansion I/O Unit output bits

Work bits M 0 to f 16 Can only be used within the program.

Holding bits

addresses

I 0 to 5 6 CPU Units

0 to b 12 CPU Units

X 0 to b 12 Reflect the ON/OFF status of the input

B 0 to 7 8 Turn ON when the operation buttons

A 0 to 3 4 Output the comparison result for ana-

P 0 to f 16 Compare the present value of timers

Q 0 to 3 4 CPU Units

0 to 7 8 CPU Units

Y 0 to b 12 Output the ON/OFF status of the output

H 0 to f 16 Same as for work bits however the

No.

bits

with 10 I/O pts

with 20 I/O pts

devices connected to the Expansion I/O Unit input terminals.

are pressed in RUN mode. Can only be used for LCD-type CPU Units.

log inputs. Can only be used for models with a 24-VDC power supply.

(T), holding timers (#), and counters (C), and outputs the comparison result.

with 10 I/O pts

with 20 I/O pts

bits to the outputs devices connected to the Expansion I/O Unit.

Cannot output to an external device.

holding bits maintain ON/OFF status when power is turned OFF.

Function Ladder

Reflect the ON/OFF status of the input devices connected to the CPU Unit input terminals.

Output the ON/OFF status of the output bits to the outputs devices connected to the CPU Unit.

programs

N.O./N.C. inputs

Outputs (See note.)

Page

Note The following additional functions can be selected for bit outputs.

Execution condition

[ Normal output Turns ON or OFF according to the ON/OFF status of the execution condition.

S Set Holds ON status after the execution condition turns ON once.

R Reset Holds OFF status after the execution condition turns ON once.

A Alternate Alternates between ON and OFF whenever the execution condition turns ON

(input latch operation).

Bit address

Bit type

Additional function ([, S, R, A)

Memory Areas Section 1-4

Timers and Counters

Name Ty pe Bit

Timer T 0 to f 16 Can be switched between ON delay,

Holding timer

Counter C 0 to f 16 Reversible counters that can be

Weekly timer

Calendar timer

addres

ses

# 0 to 7 8 Holds the present value during

@ 0 to f 16 Can turn ON or OFF during a speci-

0 to f 16 Can turn ON or OFF during a speci-

Note 1. The above memory areas are smaller for pre-V1 CPU Units.

2. Timers can switch between operations. Refer to page 59.

X ON

delay

■

OFF delay

O One-shot Turns ON the timer bit for the set period when the trigger input changes from OFF

F Flashing

pulse

Times down while the trigger input is ON and turns ON the timer bit when the set time is reached.

Turns ON the timer bit while the trigger input is ON, starts timing down when the trigger input turns OFF, and turns OFF the timer bit when the set time is reached.

to ON only.

Timer bit repeatedly turns ON/OFF at set intervals while the trigger input is ON.

No. of

tim-

ers/coun

ters

Function Use in lad-

OFF delay, one-shot, and flashing pulse operation.(See note.)

counting even if the trigger input or power supply is turned OFF. Continues the timing when the trigger input or power supply is turned ON again.

incremented and decremented.

fied day or time period.

fied date period.

der pro-

grams

N.O./N.C. condition

Page

Display Bits

Name Typ e Bit

Display D 0 to f 16 Display user-set character

addresses

Note The above memory area is smaller for pre-V1 CPU Units.

Display No.

Function switching

No.

bits

strings, times, timer present values, counter present values, or analog-converted values.

Function Use in lad-

Function switching

D Display

C Clear display

- - -(System software

Ver. 1.10 or later)

der pro-

Page

grams

Output 82

Allocating I/O Bit Numbers Section 1-5

1-5 Allocating I/O Bit Numbers

For CPU Units with 10 I/O points, the input bit addresses I0 to I5 and output bit addresses Q0 to Q3 are always allocated to the CPU Unit.

For CPU Units with 20 I/O points, the input bit addresses I0 to Ib and output bit addresses Q0 to Q7 are always allocated to the CPU Unit.

Up to 3 Expansion I/O Units can be added and input bit addresses X0 to Xb and output bit addresses Y0 to Yb are allocated in the order the Units are connected.

Connection Example for 4-point Expansion Input Unit, 4-point Expansion Output Unit, and 8-point Expansion I/O Unit

■

CPU Units with 10 I/O Points

Input bit address

Output bit address

Input bit address

Output bit address

I0 I1 I2 I3 I4 I5 X0 X1 X2 X3

IN0IN1IN 2IN3IN4IN5IN0IN 1IN2IN

CPU Unit (10 I/O points)

OUT 0OUT 1OUT 2OUT

Expansion I/O Unit 1 (4 inputs)

Expansion

I/O Unit 2 (4 outputs)

OUT 0OUT 1OUT 2OUT 3OUT 0OUT 1OUT 2OUT

Q0 Q1 Q2 Q3 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

■

CPU Units with 20 I/O Points

I1 I2 I3 I4 I5

IN0IN1IN2IN3IN4IN

OUT 0OUT 1OUT 2OUT

Q0 Q1Q2 Q3 Y0 Y1 Y2 Y3 Y4Y5 Y6 Y7

I6 I7 I8 I9 Ia Ib

IN6IN7IN8IN9INaIN

CPU Unit (20 I/O points)

OUT 4OUT 5OUT 6OUT

Q4 Q5Q6 Q7

X0 X1 X2 X3X4X5 X6 X7

IN0IN1IN2IN

Expansion I/O Unit 1 (8 I/O points)

OUT 0OUT 1OUT 2OUT

IN0IN1IN2IN

Expansion I/O Unit 2 (8 I/O points)

OUT 0OUT 1OUT 2OUT

IN0IN1IN2IN

Expansion I/O Unit 3 (8 I/O points)

X9 Xa Xb

IN0IN 1IN2IN

Expansion I/O Unit 3 (4 inputs)

X5 X6 X7

Note When an Expansion I/O Unit that does not have both inputs and

outputs, such as the 4-point Input Unit and the 4-point Output Unit shown in the above diagram, the unused bit addresses are not allocated to that Unit and are used for the next Unit.

Preparations for Operation Section 1-6

1-6 Preparations for Operation

Mount ZEN to Control Panels

The ZEN can be mounted to either a DIN Track or directly onto the surface of the control panel. Refer to page 32.

Connect Power Supply, Input, and Output Devices

Wire the ZEN to the power supply, input, and output devices. Refer to page 33.

Make Initial Settings

Make the settings required before programming, such as date, time, and display language. Refer to pages 50 and 51.

Write Program

Input the ladder program, including timers, counters, and other parameters.

Use the ZEN Support Software when using the LED-type CPU Units (without LCD or operation buttons.) Refer to page 52.

Check Program Execution

Perform trial operation before starting actual operation and check that the system is operating correctly. Refer to page 62.

DIN Track

Powe r supply

Output

LCD-type CPU Unit

Load

ON OFF

Load

Operation buttons

Inputs

Save Program

Debugged programs and all parameters should be saved to a Memory Cassette or ZEN Support Software to prevent loss of the data. Refer to page 97.

Actual Operation

ZEN-ME01 Memory Cassette

SECTION 2

Installation and Wiring

This section explains how to mount and wire the ZEN CPU Units and Expansion I/O Units.

2-1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2-1-1 Installation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2-1-2 Connecting Expansion I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2-2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Mounting Section 2-1

2-1 Mounting

2-1-1 Installation Method

Always mount the ZEN inside a control panel. The ZEN can either be mounted to the surface of the control panel or onto DIN Track.

Orientation

Do not mount the ZEN in any orientation other than the one shown in the following diagram.

To p

Bottom

Mounting to DIN Track

1 Pull down the hook

on the bottom of the ZEN.

2 Hang the slot at the

back of the ZEN on to the top of the DIN Tra c k.

3 Attach the ZEN to the

DIN Track.

4 Push up the locking

hook on the bottom of the ZEN to lock the ZEN in place.

Mounting Inside a Control Panel

Use M4 screws to mount the ZEN.

Tw o, M 4

4.5

5.5

Mounting Dimensions (Unit: mm)

Unit A B

CPU Unit CPU Units with 10 I/O points 60 80

CPU Units with 20 I/O points 112.5 80

Expansion I/O Unit

Units with 8 I/O points 60 80

Units with 4 inputs

Unit with 4 outputs

Wiring Section 2-2

2-1-2 Connecting Expansion I/O Units

Up to 3 Expansion I/O Units can be connected.

1 Remove the Expansion Unit connector cover

on the side of the CPU Unit.

Insert a flat-blade screwdriver or similar tool and remove the cover.

Note 1. Do not remove the Expansion Unit connector cover on the right

edge of the connected Expansion Unit.

2. Be careful when inserting the screwdriver that you do not insert it too far and damage the base or the elements.

2-2 Wiring

General Wiring Precautions

External Wiring

Do not run ZEN I/O lines in the same duct or conduit as power lines.

■

Hanging Ducts

Leave at least 300 mm between the power cables and the I/O or control wiring, as shown in the following diagram.

2 Line up the connectors on the Expansion I/O Unit with the

connectors on the CPU Unit and join.

Make sure the connectors are lined up and push the Expansion I/O Unit and the CPU Unit together.

I/O lines

Control cables and power lines

Power cables

300 mm min.

Wiring Section 2-2

■

Floor Ducts

Leave at least 200 mm between the wiring and the top of the duct, as shown in the following diagram.

I/O lines

■

Conduits

Control cables and power lines

Power cables

Metal plate (iron)

200 mm min.

Separate the ZEN I/O lines, power and control lines, and power cables, as shown in the following diagram.

Control cables and

I/O lines

power lines

Power cables

Do not run ZEN I/O lines in the same duct or conduit as power lines.

Connectable Wires

• A terminal block designed for solid wires is used. Use solid wires when wiring.

Solid wires Stranded wires Straight terminals

One-line connection

Two-line connection

0.2 to 2.5 mm

0.2 to 0.75 mm

0.2 to 2.5 mm (Equivalent to AWG 24 to 14.)

0.2 to 0.75 mm (Equivalent to AWG 24 to 19)

0.25 to 2.5 mm

0.25 to 0.75 mm

• Strip the sheath back 6.5 mm.

6.5 mm

Wiring Section 2-2

• Twisted wires can cause shorts so never directly connect twisted wires. Always connect a straight crimp terminal if using twisted wires.

Insulated sleeve

Bar terminal

• Use a flat-blade screwdriver to tighten the terminal block screws.

Wiring Power Supply and Input Lines

AC Power Supplies

!WARNING Do not connect the isolated side (L) and the grounded side (N) in

reverse. Wire the L side to the AC input circuit.

!Caution Tighten the AC power supply terminals to a torque of 0.5 to

0.6 N·m. Loose screws can result in fire or faulty operation.

■

CPU Units with 100 to 240-VAC Power Supplies

• To prevent voltage drops due to starting currents and inrush currents in other devices, wire the ZEN power supply circuit separately from other power circuits.

• When using more than one ZEN, to prevent voltage drops due to inrush current and circuit-breaker malfunctions, it is recommended that each one is wired separately.

• To prevent the influence of noise from power lines, twist the power lines. Wiring via a 1-to-1 isolation transformer is also effective.

• Use wires that are thick enough to allow for voltage drops and current variations within the allowable range.

AC power supply

Circuit protector

Isolation transformer

CPU Unit (AC power supply type)

Input device

Expansion I/O Unit (AC input type)

Wiring Section 2-2

CPU Units with 10 I/O Points (V1 and Pre-V1 Models)

100 to 240 VAC, 50/60 Hz, 30 VA

Circuit protector

CPU Unit with 10 I/O points

Input device

OFF

³ 80 V

£ 25 V

CPU Units with 20 I/O Points

Circuit protector

ON OFF

³ 80 V

£ 25 V

CPU Unit with 20 I/O points

■

Expansion I/O Units

Circuit

Circuit protector

protector

Expansion I/O Unit (AC input type)

Input device

I6NC I7 I8 I9 Ia IbI5I0 I1 I2 I3 I4

ON OFF

³ 80 V

£ 25 V

Note 1. Observe the power supply polarity when wiring the power supply

and the input circuits. The input signals cannot be read if the polarity is incorrect.

2. Include a circuit protector or breaker for the ZEN in the power supply circuit.

3. There are no restrictions on the polarity of the inputs on the Expansion I/O Units.

4. A two-wire sensor cannot be connected directly to the AC input. To connect a two-wire sensor, attach an external bleeder resistance in the way shown below.

Wiring Section 2-2

• Example: Connecting to a CPU Unit

Two-wire sensor

I0 to I5

300k330k

51k

Internal circuit

• Example: Connecting to an Expansion I/O Unit

83k

COM

4.7k

Internal circuit

a) Use a resistance that satisfies both of the following condi-

tions.

R (W) £

Max. OFF-voltage for AC input (25 VAC) Sensor’s max. leakage current

R (W) £

Voltage supplied to sensor

Min. current for which the sensor’s OFF residual voltage is less than 25 V

b) Because of heat generation, use a resistor with at least the

following wattage.

(

Voltage supplied

to sensor)

P (W) ³

´ 3 (allowance factor)

Resistance value

Wiring Section 2-2

DC Power Supplies

■

CPU Units with 10 I/O Points

!Caution Be sure to connect COM terminal before turning ON power. The

un-connecting COM terminal or the wiring change after turning ON power may cause malfunction.

Connecting a Negative Common (V1 CPU Units)

24 VDC, 6.5 W

CPU Unit with 10 I/O points

COM

Note: Supply power to the COM

terminal at the same time as to the power supply terminal.

Input device

Connecting Analog Input Devices (Input Range: 0 to 10 V) to Input Terminals I4 and I5

24 VDC, 6.5 W

DC power supply

Note: When connecting an analog

input device, always connect the negative side to the COM

COM

terminal.

CPU Unit with 10 I/O points

Connecting Positive Common (V1 CPU Units Only)

24 VDC, 6.5 W

COM

CPU Unit with 10 I/O points

Note: 1. If a positive common is used,

Input device

analog input devices cannot be connected to I4 and I5.

2. Supply power to the COM terminal at the same time as to the power supply terminal.

Wiring Section 2-2

Connecting to Pre-V1 CPU Units

24 VDC, 6.5 W

–

CPU Unit

Note: With pre-V1 CPU Units,

the negative side of the power supply circuit is connected internally as

Input device

the common for the input circuits. Input circuits cannot be connected with a positive common; they will not work.

Connecting Analog Inputs (Input Range: 0 to 10 V) to Input Terminals I4 and I5 (Pre-V1 CPU Units)

24 VDC, 6.5 W

CPU Unit

■

CPU Units with 20 I/O Points

DC power supply

!Caution Be sure to connect COM terminal before turning ON power. The

un-connecting COM terminal or the wiring change after turning ON power may cause malfunction.

Connecting a Negative Common (V1 CPU Units)

24 VDC, 6.5 W

COM

CPU Unit with 20 I/O points

Note: Supply power to the COM

terminal at the same time as to the power supply terminal.

Input device

I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4

OFF

³ 16 V

£ 5 V

Wiring Section 2-2

Connecting Analog Input Devices (Input Range: 0 to 10 V) to Input Terminals Ia and Ib

24 VDC, 6.5 W

− +

DC power supply

COM

24 VDC, 6.5 W

COM

−

Note Either a positive or negative common can be connected with

I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4

CPU Unit with 20 I/O points

Connecting Positive Common (V1 CPU Units Only)

I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4

■

Expansion I/O Units

24 VDC, 6.5 W

Expansion I/O Unit (with DC Power Input)

Expansion I/O Units.

Note: 1. If a positive common is used,

Input device

analog input devices cannot be connected to Ia and Ib.

2. Supply power to the COM terminal at the same time as to the power supply terminal.

Input device

³ 16 V

OFF

£ 5 V

ON OFF

³ 16 V

£ 5 V

Wiring Section 2-2

Precaution

1. Do not connect the + and - DC power supply in reverse on CPU Units with DC power supplies.

2. With V1 CPU Units, both PNP and NPN sensors can be connected to DC input circuits.

Connecting PNP Sensors

PNP output

+ (power supply)

I0 to I3

(I0 to I9)

− (COM)

4.1 kΩ 750 Ω

2,200 pF

Internal circuits

Connecting NPN Sensors

NPN output

I0 to I3 (I0 to I9)

(COM)

−

4.1 kΩ

750 Ω

2,200 pF

Internal circuits

Wiring Section 2-2

Input Devices

The following table shows how to connect various input devices.

Device Circuit diagram

Relay output

NPN open collector

NPN current output

PNP current output

Voltage output

Constant current circuit

Output

0 V

Output

0 V

Output

0 V

Sensor power supply

COM (+)

Use the same power supply for the input and sensor.

COM (+)

COM (-)

COM (+)

ZEN

Note Do not use the following wiring with voltage-output devices:

Sensor power

Output

0 V

supply

COM(+)

ZEN

Wiring Section 2-2

3. Use only PNP sensors for pre-V1 CPU Units. NPN sensors cannot be connected directly. To connect an NPN sensor, connect it through a relay or connect external resistance, as shown below. Be sure to allow for the reverse logic that will result from this type of connection

• Connecting to I0 to I3

External resistance

20.4 VDC

1 kΩ

min.

NPN output

a) When an NPN sensor is connected, use an external resis-

tance R of at least 1 kW and 2 W.

b) Use a power supply voltage of at least 20.4 VDC for the sen-

sor.

• Connecting to I4/I5

External resistance

I0 to I3

4.1 kΩ

680 Ω

Internal circuit

NPN output

20.4 VDC min.

82 kΩ

I4, I5

150 kΩ

2.4 kΩ

27 kΩ

Internal circuit

c) When an NPN sensor is connected, use an external resis-

tance R of at least 82 kW and 1/8 W.

d) Use a power supply voltage of at least 20.4 VDC for the sen-

sor.

e) Do not input a negative (–) signal to the analog inputs (I4, I5).

The internal elements may be damaged if a negative signal is input.

Wiring Section 2-2

■

Leakage Current from Input Devices

A leakage current can cause false inputs when using 2-wire sensors (proximity switches or photoelectric switches) or limit switches with LEDs. False inputs won’t occur if the leakage current is less than

1.0 mA. If the leakage current exceeds this value, insert a bleeder resistor in the circuit to reduce the input impedance, as shown in the following diagram.

Input power supply

Bleeder resistor

2-wire sensor, etc.

I: Device's leakage current (mA) R: Bleeder resistance (kΩ) W: Bleeder resistor's power rating (W)

Lc× 5.0

R =

I× Lc− 5.0

The equations above were derived from the following equations:

Input voltage (24)

R ×

Input Current (Ic)

I ×

W ≥

Refer to page 112 Input Specifications for details on the values LC, IC, and EC. The input impedance, input current, and OFF voltage may vary depending on the input being used. (IN00000 through IN00002 have different values.)

Input voltage (24)

R +

Input Current (Ic)

Input voltage (24)

× Input voltage (24) × tolerance (4)

kΩ max.

≤ OFF voltage (Ec: 5.0)

ZEN

: ZEN's input impedance (kΩ)

: ZEN's input current (mA)

: ZEN's OFF voltage (V) = 5.0 V

2.3 R

W min.

W =

Wiring Section 2-2

■

Inductive Loads

When connecting an inductive load to an input, connect a diode in parallel with the load. The diode should satisfy the following requirements:

1,2,3... 1. Peak reverse-breakdown voltage must be at least 3 times the load

voltage.

2. Average rectified current must be 1 A.

Diode

ZEN

COM

Wiring Output Circuits

(1) Relay Output Type

For CPU Units with 10 I/O points, all 4 outputs in the relay output circuits have independent contacts. For CPU Units with 20 I/O points, outputs Q0 to Q3 in the relay output circuits have independent contacts and outputs Q4 to Q7 have 2 points per common.

There are no particular restrictions on polarity.

CPU Unit with 10 I/O points

The V1 CPU Unit is shown at the left. Wiring is the same for pre-V1

Q0 Q1 Q2 Q3

Load

CPU Units.

CPU Unit with 20 I/O points

Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7

Load

Wiring Section 2-2

Expansion I/O Unit

OUT0 OUT1 OUT2 OUT3

Load

(2) Transistor Output Type

For CPU Units with 10 I/O points and Expansion I/O Units, all 4 outputs in the transistor output circuits have independent circuits. For CPU Units with 20 I/O points, outputs Q0 to Q3 in the transistor output circuits have independent circuits and outputs Q4 to Q7 have 2 points per common.

The terminals have polarity given on the terminal block, but no problem will result from reversing the connection positions of the power supply and load.

CPU Unit with 10 I/O points

−

Load

−

Q1 Q2 Q3

Load

−

Load

250 VAC, 8 A (cosf = 1)

Load

24 VDC, 5 A

−

Load

The V1 CPU Unit is shown at the left. Wiring is the same for pre-V1 CPU Units.

CPU Unit with 20 I/O points

Load

−

Load

−

Q0 Q1 Q2 Q3

Expansion I/O Unit

OUT0 OUT1 OUT2 OUT3

Load

−

Q4 Q5 Q6 Q7

Load

Switching capacity:

0.5 A, 24 VDC

Load

−

Load

Wiring Section 2-2

Output Wiring Precautions

Output Short Circuit Protection

We recommend adding a protective fuse to all output circuits to protect the output elements and PCBs from burning if the load connected to the output terminal short-circuits.

Inductive Loads

When connecting an inductive load to an input, connect a surge protector or diode in parallel with the load.

The surge protector’s components should have the following ratings:

Relay Output

ZEN

Relay Output (Transistor Output)

ZEN

OUT

COM

(+)

(−)

(+)

(−)

Surge protector

Diode

The diode should satisfy the following requirements:

Peak reverse-breakdown voltage must be at least 3 times the load voltage. Average rectified current must be 1 A.

Wiring Section 2-2

Inrush Current Considerations

When switching a load with a high inrush current in the ZEN relay output or transistor output model, such as an incandescent lamp, suppress the inrush current as shown below.

Countermeasure 1

Countermeasure 2

Providing a dark current of approx. one-third of the rated value through an incandescent lamp

Providing a limiting resistor

Fuse Insertion

The ZEN with transistor output may burn if the load is short-circuited, therefore, insert a protective fuse in series to the load.

SECTION 3

Programming and Operating Methods

This section explains how to create and edit ladder programs and how to use the timers, counters, comparators, display function and buttons switches.

3-1 Selecting Display Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3-2 Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3-3 Creating Ladder Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3-3-1 I/O Wiring and Internal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3-3-2 Clearing Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3-3-3 Writing Ladder Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

3-4 Confirming Ladder Program Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3-5 Correcting Ladder Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3-5-1 Changing Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3-5-2 Changing Additional Bit Output Functions . . . . . . . . . . . . . . . . . . . . . 64

3-5-3 Deleting Inputs, Outputs, and Connection Lines . . . . . . . . . . . . . . . . . 65

3-5-4 Inserting Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

3-5-5 Deleting Blank Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

3-6 Using Timers (T) and Holding Timers (#). . . . . . . . . . . . . . . . . . . . . . . . . . . 67

3-6-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 68

3-6-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 68

3-6-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

3-7 Using Counters (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3-7-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 70

3-7-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 71

3-7-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

3-8 Using Weekly Timers (@) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

3-8-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 72

3-8-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 72

3-8-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

3-9 Using Calendar Timers (*). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

3-9-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 74

3-9-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 74

3-9-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3-10 Analog Inputs (Analog Comparators (A)). . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3-10-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 77

3-10-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 77

3-10-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3-11 Comparing Timer/Counter Present Values Using Comparators (P) . . . . . . . 79

3-11-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 79

3-11-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 80

3-11-3 Parameter Monitor Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3-12 Displaying Messages (Display Bits (D)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3-12-1 Settings in the Ladder Program Edit Screen. . . . . . . . . . . . . . . . . . . . . 82

3-12-2 Settings in the Parameter Settings Screen . . . . . . . . . . . . . . . . . . . . . . 83

3-13 Using Button Switches (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Selecting Display Language Section 3-1

3-1 Selecting Display Language

There is a choice of 6 display languages for LCD-type CPU Units. The default language is English.

Operation to Select German

Tur n ON the power.

Press the OK Button to change to the Menu Screen.

▼

Press the Down Button 4 times to move the cursor to “LANGUAGE”.

▲▼

Press the OK Button to display the current language (“ENGLISH”). The final “H” will be highlighted and flashing.

Press the OK Button to make the whole word “ENGLISH” flash. A different language can now be selected.

Use the Up/Down Buttons to select a language.

SPANISH ITALIAN

FRENCH GERMAN JAPANESE



ENGLISH

LANGUAGE

LANGUAGE SET?

OK /ESC

RUN PARAMETER KALENDER

SPRACHE

▲▼

GERMAN

Press the Up Button to select GERMAN.

Press the OK Button to display a confirmation message.

Press OK to set the new language.

The display language will change to German.

Press the OK Button to complete the setting.

Setting the Date and Time Section 3-2

3-2 Setting the Date and Time

The date and time are not set when the product is shipped. The date and time must be set for models with calendar and time functions before the ZEN can be used.

Select SET CLOCK.

PROGRAM RUN PARAMETER

SET CLOCK

▼

SET CLOCK

SUMMER TIME

Press the OK Button to display the submenu for clock settings. Select SET CLOCK from the submenu.

SET C

SE LOCK yy

yy/mm /dd 00

00 /01/01

Current date: yy/mm/dd

Current time: hh:mm (day)

Days of the week

SU: Sunday MO: Monday TU: Tuesday WE: Wednesday TH: Thursday FR: Friday SA: Saturday

SET CLOCK yy/mm/dd 00/04/ 01 11: 3

SET CLOCK SET ? OK /ESC 11:35(SU)

00:03(SA)

5 (SU )

Press the OK Button to display the current date and time settings. The right digit of the date will be highlighted and flashing.

Set the date and time.

Use the Up/Down Buttons to change the setting.

Use the Left/Right Buttons to move the cur- sor.

The day will automatically change when the date is set.

Press the OK Button to display a confirmation message.

Press the OK Button to confirm and complete the setting.

Creating Ladder Programs Section 3-3

!Caution

If the power supply is turned OFF for an extended period of time (2 days or more at 25°C), the date and time will return to the default setting (00/1/1; 00:00 (SA)). This may cause programs using calendar timers or weekly timers to malfunction. Therefore, mount a Battery Unit for the system if the power supply is expected to be interrupted for an extended time. (Refer to page 96.)

Note 1. The year can be set between 2000 and

2099.

2. If Summertime is set, “S” will appear at the top right of the time setting screen during the Summertime period. (Refer to page 93.)

SET CLO CK S yy /mm/dd 01/05/01 00:00( TU)

3-3 Creating Ladder Programs

Example Program

This section explains how to write ladder pro-

SW1 SW2

grams for LCD-type CPU Units, based on a simple circuit example.

Refer to the ZEN-SOFT01-V3 ZEN Support Software Operation Manual (Z184) for information on programming LED-type CPU Units.

“S” displayed during Summertime period

Creating Ladder Programs Section 3-3

3-3-1 I/O Wiring and Internal Operation

Power supply terminals

Ladder program

Output terminals

SW1 SW2

L N I0 I2 I3I1

(1) (2)

I0 I1

(3)

Q0 Q1

Load

Input terminals

Connect switches SW1 and SW2 to input terminals I0 and I1.

When SW1, connected to input bit I0, turns ON or OFF, I0 (indicated by (1) in the diagram) turns ON or OFF.

When SW2, connected to input bit I1, turns ON or OFF, I1 (indicated by (2) in the diagram) turns ON or OFF.

If the ladder program is executed in RUN mode and SW1 turns ON, input bit I0 turns ON, output bit Q0 turns ON, and the output contact (indicated by (3) in the diagram) turns ON.

When the output contact (3) turns ON, the load connected to output terminal Q0 turns ON.

3-3-2 Clearing Programs

Clear the ladder program before starting to write a program. By performing the Delete Program operation, the ladder program will be completely cleared. The display language, date/time settings, and all other settings will not be initialized.

STOP mode display

PROGRAM

RUN PARAMETER SET CLO CK

▼

EDIT PROG

DELETE PROG

DELET E PRO G DELE TE? OK/ ESC

Press the OK Button to switch to the Menu Screen and select PROGRAM.

Select DELETE PROG.

If a password has been set, a Password Input Screen will be displayed. Input the password.

Press the OK Button to display a confirmation message.

Creating Ladder Programs Section 3-3

EDIT PROG

DELE TE PROG

When the Delete Program operation has been completed, the display will return to the original screen.

3-3-3 Writing Ladder Programs

STOP mode display

PROGRAM

RUN PARAMETER SET CLOCK

▼

EDIT PROG

DELE TE PROG

Press the OK Button to switch to the Menu Screen and select PROGRAM.

Select EDIT PROGRAM.

Indicates the line number in the ladder program at the cursor position (line 0 in this example.)

Cursor flashing in a reversed state. Press the OK Button to switch to the Ladder

Program Edit Screen.

Creating Ladder Programs Section 3-3

Operations in the Ladder Program Edit Screen

Two lines of circuits can be displayed at one time on the Ladder Program Edit Screen.

• Up to 96 lines can be written.

• Up to 3 inputs and 1 output can be written per line.

• Example ladder diagram

Bit type

Bit address

Connection line

▼

N.C. input

N.O. input

Positions for Writing Inputs, Outputs, and Connection Lines

Additional output functions Ladder program line number at cursor

Bit address Bit type Displayed when there are more lines. Use the Down Button to

display the lines.

Displayed when there are more lines. Use the Up Button to display the lines.

Input write positions

Bit type/bit number

Input symbol (N.O./N.C) or connection line

Bit/timer/counter/ output write positions

Connection line write positions

Creating Ladder Programs Section 3-3

3-3-3-1 Writing an Input for I0

Press the OK Button to display the initial write setting (N.O input I0) and move the

▼

flashing cursor to the bit type I position. Use the Up/Down Buttons to select the bit type. Use the Right Button to move the flashing cursor to the 0 position and then use the Up/ Down Buttons to select the bit address.

Press the OK Button twice to complete the write operation for input I0. The highlighted

▼

cursor will move the next input position.

3-3-3-2 Writing Serial Input I1

Press the OK Button to display the N.O. input and input I0 again.

▼

Press the ALT Button to switch to a N.C. input.

▼

(Press the ALT Button again to switch back to a N.O. input.)

Use the Right Button to move the flashing cursor to the bit address position and use the

Up Button to change the bit address to 1.

Writing Inputs

Input Symbol Configuration

Press the OK Button to move the highlighted cursor to the next input position. A connec-

▼

tion will automatically be created between input I0 and the next input.

Bit type

Bit number

Input symbols ( N.O. input; N.C. input.)

Creating Ladder Programs Section 3-3

Memory Areas

Symbol Name Bit type and number

I CPU Unit input bits I0 to I 5 (6 points) (See note 1.)

Q CPU Unit output bits Q0 to Q3 (4 points) (See note 2.)

X Expansion I/O Unit input

bits

Y Expansion I/O Unit output

bits

M Work bits M0 to Mf (16 points)

H Holding bits H0 to Hf (16 points)

B Button switches B0 to B7 (8 points) (See note 4.)

X0 to Xb (12 points) (See note 3.)

Y0 to Yb (12 points) (See note 3.)

Note

1. I0 to Ib (12 points) for CPU Units with 20 I/O points.

2. Q0 to Q7 (8 points) for CPU Units with 20 I/O points.

3. Can be used only when Expansion I/O Units are connected.

4. Can be used only when LCD-type CPU Units are used.

Timers, Counters, and Analog Comparators

Symbol Name Bit type and number

T Timers T0 to Tf (16 timers)

# Holding timers #0 to #7 (8 timers)

@ Weekly timers @0 to @f (16 timers) (See note

* Calendar timers *0 to *f (16 timers) (See note

C Counters C0 to Cf (16 counter)

A Analog comparators A0 to A3 (4 comparators)

P Comparators P0 to Pf (16 comparators)

Note

1. Can be used only with CPU Units with calendar and clock functions.

2. Can be used only with CPU Units with DC power supply.

Press the ALT Button to enable drawing a connection line. The left arrow cursor will

▼

flash.

1.)

(See note 2.)

Creating Ladder Programs Section 3-3

Press the Right Button to draw a connection line to the output.

▼

Writing Outputs

Output Configuration

Bit number

Bit type

Additional functions

■

Memory Areas

Symbol Name Bit type and number

Q CPU Unit output bits Q0 to Q3 (4 outputs) (See note 1.)

Y Expansion I/O Unit output

bits

M Work bits M0 to Mf (16 bits)

H Holding bits H0 to Hf (16 bits)

Y0 to Yb (12 outputs) (See note 2.)

Note

1. Q0 to Q7 (8 points) for CPU Units with 20 I/O points.

2. Can be used only when Expansion I/O Units are connected.

■

Additional Functions for Output Bits

Symbol Name

[ Normal operation

S Set operation

R Reset operation

A Alternate operation

Creating Ladder Programs Section 3-3

Additional Functions for Bit Outputs

[: Normal output S: Set R: Reset A: Alternate

Q0 turns ON and OFF when execution condition I0 turns ON and OFF.

Q1 turns ON and stays ON when execution condition I1 turns ON once.

Q2 is forced OFF when execution condition I2 turns ON.

Q3 alternates between On and OFF each time execution condition I3 turns ON.

Timers, Holding Timers, Counters, and Display Output Configurations

Timer/counter/display number

Timer/counter/display type

Timer/counter output type

■

Timers, Counters, and Display Bits

Symbol Name Type and number Output type

T Timer T0 to Tf (16 timers) T: Trigger

# Holding timer #0 to #7 (8 timers)

C Counter C0 to Cf (16 counters) C: Count

D Display bit D0 to Df (16 bits)

Note

(See note 2.)

1. These memory areas are smaller for the

R: Reset

D: Count direction R: Reset

pre-V1 CPU Units.

2. For LCD-type CPU Units only.

3-3-3-3 Writing an Output to Q0

▼

Press the Right Button again to draw a line to the output and move the highlighted cursor to the output write position.

Press the OK Button to display the initial value for the output (normal output/Q0) and move the flashing cursor to the bit type Q position.

Use the Up/Down Buttons to select the bit type. Use the Right/Left Buttons to move the flashing cursor and use the Up/Down But-

Creating Ladder Programs Section 3-3

tons to select additional functions or select the bit address.

Press the OK Button twice to complete writing output Q0. The highlighted cursor will

▼

move to the input at the beginning of the next line.

3-3-3-4 Writing a Parallel Input for Q0

Press the OK Button to display input I0 and move the flashing cursor to the bit type I

▼

position.

Press the Up Button to select Q (a CPU Unit output bit).

▼

Press the OK Button twice to complete writing the parallel input for Q0. The highlighted

▼

cursor will move to the next input.

3-3-3-5 Drawing Connection Lines for OR Circuits

Drawing Connection Lines

Horizontal connection lines

Vertical connection lines

Intersecting lines

Press the ALT Button when the highlighted cursor is at the input write position to change the cursor to a left flashing arrow and enable connection lines to be drawn. Move the left arrow the position for drawing the connection line and press the Up, Down, Left, and Right Buttons to draw connection lines vertically and horizontally.

It will not be possible to draw connection lines when the beginning or end of the line has been reached or if the OK and ESC Buttons are pressed.

Press the ALT Button to enable drawing con- nection lines.

▼

Creating Ladder Programs Section 3-3

Press the Up Button to simultaneously draw a connection line both vertically and horizon-

▼

Note

1. Always press the ESC Button and return to the Menu Screen after creating a program. If you do not press the ESC Button and return to the Menu Screen before turning OFF the power, the program and settings will be deleted.

2. Do not input a program where the connection lines double back on themselves. The program will not operate properly if such lines are drawn.

3. Do not use the same output bit address for more than one output from the program. The resulting operation may not be as expected.

tally. The cross (+) indicates an intersection.

Press the OK Button to complete writing the connection line and change to a highlighted flashing cursor.

Press the ESC Button to complete the write operation.

Press the ESC Button again to return to the Menu Screen.

[Q0

Here, the final status of Q0

[Q0

will be controlled by I1, not by I0.

Confirming Ladder Program Operation Section 3-4

3-4 Confirming Ladder Program Operation

Always check the ladder program operation before using the ZEN.

Note 1. Before turning ON the power, check that the power supply, input

circuits, and output circuits have been wired correctly.

2. For systems with loads connected to the outputs that may cause serious injury or damage to equipment if operation is incorrect, remove the output wiring before performing trial operation.

3. Always ensure safety in the vicinity before turning ON the power or switching operating modes.

Procedure for Checking Operation

Checks Before Turning ON the Power

1. Check that the ZEN is mounted and wired correctly.

2. Check that the operation of the ZEN will not have a negative impact on the system. Check for any dangers.

3. Turn ON the power supply to the ZEN. Switch to RUN mode while the ZEN is stopped.

Operation Checks

4. Turn each input ON and OFF and check that the program is operating correctly.

5. Adjust any problems.

Method for Checking Operation

LCD-type CPU Units

LED-type CPU Units

Check the operation by the flashing input and output displays on the Main Screen.

Connect the ZEN Support Software and check operation using the monitor function. Refer to the operation manual for the ZEN Support Software.

Confirming Ladder Program Operation Section 3-4

Checking Operation

Changing Operating Mode

Turn I0 ON.

I0 I1

Turn I0 OFF.

I0 I1

PROGRAM

RUN

PARAMETER SET CLOCK

▼

MONITOR

STOP

PARAMETER SET CLOCK

RUN

▼

Checking Operations on Main Screen

Press the ESC Button to switch to the Main Screen.

Q0 will turn ON when I0 turns ON.

I0 ON. Q0 ON at the same

time.

Q0 remains ON even if I0 turns OFF.

I0 OFF.

Q0 ON.

Press the OK Button to display the Menu Screen and press the Down Button to move the flashing cursor to RUN.

Press the OK Button to switch from STOP mode to RUN mode.

Checking Operations Using Ladder Program Monitor

MONITOR

STOP PAR AME TE R SET CLOCK

RUN

Select Monitor in RUN mode.

▼

Press the OK Button to switch to the Ladder Program Monitoring Screen.

Q0 turns ON at the same time when I0 turns ON. When the bit is ON, the vertical and horizontal lines are thick.

Turn I1 ON.

I0 I1

Q0 will turn OFF when I1 is turned ON.

I1 ON. Q0 OFF.

Correcting Ladder Programs Section 3-5

3-5 Correcting Ladder Programs

3-5-1 Changing Inputs

Change contact Q0 to M1.

Move the highlighted cursor to the input to be changed.

Press the OK Button to change the high-

3-5-2 Changing Additional Bit Output Functions

Move the highlighted cursor to the output to be changed.

lighted cursor to a flashing cursor and move the flashing cursor to the bit type position.

Use the Up/Down Buttons to select M. Press the Right Button to move the flashing

cursor to the bit address position. Use the Up/Down Buttons to change the bit address from 0 to 1.

Press the OK Button to complete the setting change.

Change the additional function for the input for Q0 to S (Set).

Press the OK Button to change the highlighted cursor to a flashing cursor.

Press the Left Button to move the flashing cursor to the additional function position.

Press the Up Button twice to change the additional function from [ to S.

Press the OK Button to complete the change.

Correcting Ladder Programs Section 3-5

3-5-3 Deleting Inputs, Outputs, and Connection Lines

Move the highlighted cursor to the position of the input, output, or connection line to be deleted and press the DEL Button.

Example: Deleting Serial Input M3

Move the highlighted cursor to the position of the input to be deleted.

Press the DEL Button to delete the input and the related connecting lines at the same time.

Example: Deleting Vertical Connecting Lines

Move the highlighted cursor to the input position to the right of the vertical line to be deleted. Press the ALT Button to enable drawing connection lines. The highlighted cursor will change to a left arrow cursor.

Press the DEL Button to delete the vertical connection line.

3-5-4 Inserting Lines

• To insert a blank line, move the highlighted cursor to the beginning of the line where the blank line is to be inserted and press the ALT Button.

Move the highlighted cursor to the beginning of the next line (the line that will be after the inserted line.)

A circuit will be added here.

Press the ALT Button to insert one blank line.

Blank line

• To add OR programming, inputs can be added between parallel inputs. Move the highlighted cursor to the beginning of the line where the input is to be inserted.

Move the highlighted cursor to the beginning of the next line (the line that will be after the inserted li ne.)

A input will be added here.

Correcting Ladder Programs Section 3-5

Press the ALT Button to reserve a 1-line

Blank line

space between the parallel inputs.

The vertical connection lines will be automatically extended.

Note A blank line cannot be inserted if an input or connection line is

written in the last line (the 96th line).

3-5-5 Deleting Blank Lines

To delete a blank line, move the highlighted cursor to the input position at the beginning of the line to be deleted and press the DEL Button.

Move the highlighted cursor to the beginning of the line to be deleted.

Note A line must be blank to be deleted, i.e., lines containing inputs

▼

and outputs cannot be deleted.

This line will be deleted.

Press the DEL Button to delete one blank line. All following lines will move up one.

Using Timers (T) and Holding Timers (#) Section 3-6

3-6 Using Timers (T) and Holding Timers (#)

The ZEN has 16 built-in timers and 8 built-in holding timers.

Timers The present value being timed will be reset when the timer switches from RUN

Holding timers The present value being timed is held even when the timer switches from RUN

Timer Operation (T0 to Tf)

Timer type Operation Main

X ON delay

timer

mode to STOP mode or the power is turned OFF. There are four uses of the timer available, depending on the additional function

selection.

mode to STOP mode or the power is turned OFF. The time will continue when the trigger input turns ON again. The ON status of the timer bit is also held when the timer times out.

Only ON-delay holding timers are supported.

applications

Tu r ns ON after a set interval after the trigger input has turned ON.

Trigger input

Reset input

Setting Present value

Timer bit

Time lag operations

OFF delay

■

timer

O One-shot

pulse timer

F Flashing pulse

timer

Note Only T0 to T7 (8 points) are supported by pre-V1 CPU Units.

Stays ON while the trigger input is ON and turns OFF after a set interval after the trigger input has turned OFF.

Remains ON for a set interval when the trigger input turns ON.

Turns ON and OFF repeatedly at set intervals while the trigger input is ON.

Trigger input

Reset input

Setting Present value

Timer bit

Trigger input

Reset input

Setting Present value

Timer bit

Trigger input

Reset input

Setting Present value

Timer bit

Useful for timing for lighting and ventilating fans

Useful for quantitative operation where operation is always required for the same period.

Useful as an alarm circuit for flashing emergency lighting or buzzers.

Using Timers (T) and Holding Timers (#) Section 3-6

Holding Timer Operation (#0 to #7)

Timer type Operation Main

X ON delay

timer only

Tu r ns ON after a set interval after the trigger input has turned ON.

Trigger input

Reset input

Setting Present value

Timer bit

Note Only #0 to #3 (4 points) are supported by pre-V1 CPU Units.

applications

When operation is to be continued even during momentary power interruptions and longer power interruptions.

3-6-1 Settings in the Ladder Program Edit Screen

Timer triggers, reset outputs, and timer inputs are drawn on the Ladder Program Edit Screen. Settings are made on the Parameter Settings Screen.

Trigger specification Timer number

Trigger input

Reset input

Timer address

Timer bit

Timer trigger output Timer reset output

Reset specification

Time up output

Timer address Timers: T0 to Tf (16 timers)/ Holding Timers: #0 to #7 (8 timers)

Trigger input T (TRG) Controls the timer trigger output. Triggers the timer when the trigger

Reset input R (RES) Controls the timer reset output. When the reset input turns ON, the

Timer bit Turns ON according to the timer type.

input turns ON.

present value is reset to 0 and the timer bit turns OFF. Trigger inputs are not accepted while the reset input is ON.

Note Only T0 to T7 (8 points) and #0 to #3 (4 points) are supported by

pre-V1 CPU Units.

3-6-2 Settings in the Parameter Settings Screen

Timer type Time units (s)

Timer address

Monitor enabled/disabled Set value

Using Timers (T) and Holding Timers (#) Section 3-6

Timer Types

X ON delay

■

OFF delay

O One-shot pulse

F Flashing pulse

Time Units and Settings

S 00.01 to 99.99 s (in 0.01-s units) Error: 0 to –10 ms

M:S 00 min 01 s to 99 min 59 s (in minutes and sec-

onds)

H:M 00 h 01 m to 99 h 59 m (in hours and minutes) Error: 0 to –1 min

Error: 0 to –1 s

Monitor Enabled or Disabled

A Operating parameters can be monitored and settings changed.

D Operating parameters cannot be monitored nor settings changed.

3-6-3 Parameter Monitor Screen Display

Trigger input status ( : OFF/ : ON)

❍●

Reset input status ( : OFF/ : ON)

❍●

RUN

Timer present value

Timer bit status ( : OFF/ : ON)

❍●

Timer setting

Using Counters (C) Section 3-7

3-7 Using Counters (C)

Up to 16 counters can be used in incremental or decremental mode. The present value for counters and the status of counter bits (ON/OFF) are held even when the operating mode is changed or there is a power interruption.

Operation

Counter bits turn ON when the count value (present value) exceeds the setting (present value ³ set value). The count returns to 0 and the bits turns OFF when the reset input turns ON. Count inputs are not accepted while the reset input is ON.

I0 (DIR)

I1 (CNT)

I2 (RES)

Set value

Present value

0000

Counter bit

3-7-1 Settings in the Ladder Program Edit Screen

Outputs for the counter input, counter direction, and counter reset are written in the Ladder Program Edit Screen. Counter input conditions can also be written. Settings are made in the Parameter Settings Screen.

Count input specification Counter address

Count input

Counter direction specification input

Reset input

Counter address

Counter bit

Output to counter input

Counter direction specification output Counter direction specification

Counter reset output Reset specification Counter bit output

Counter address C0 to Cf (16 points)

Counter input C (CNT) Increments (or decrements) each time the

Counter direction specification input

D (DIR) Switches between incremental and decremen-

count input turns ON.

tal counting. OFF: Incremental ON: Decremental

Using Counters (C) Section 3-7

Reset input R (RES) When the reset input turns ON, the present

Count input Turns ON when the counter has counted out (PV ³ SV)

Note

Only C0 to C7 (8 points) are supported by pre-V1 CPU Units.

value returns to 0 and the counter bit turns OFF. Count inputs are not accepted while the reset input is ON.

3-7-2 Settings in the Parameter Settings Screen

Counter address

Set value 0001 to 9999 (4 decimal digits) times

Monitor enabled/ disabled

A Operating parameters can be monitored and

D Operating parameters cannot be monitored or

Monitor enabled/disabled Set value

settings changed.

3-7-3 Parameter Monitor Screen Display

Count input status ( : OFF/ : ON)

❍●

Counter direction specification input status ( : OFF/ : ON)

❍●

Counter present value

RUN

Reset input status ( : OFF/ : ON)

❍

Counter bit status ( : OFF/ : ON) Counter setting

●

❍●

Note 1. To reset the counter present value and counter bit status (ON/

OFF) when at power interruptions or when the operating mode is changed, create a counter reset circuit when you first execute the program. An example is shown below.

Counter reset output

2. If the counter input and counter direction are input simultaneously, place the output for the counter direction before the output for the counter input in the program.

Counter direction specification output Output to counter input

Using Weekly Timers (@) Section 3-8

3-8 Using Weekly Timers (@)

Weekly timers turn ON between the specified start and stop times on the specified days. Weekly timers have 16 points (@0 to @f.)

Operation

Day of the week

Mon Tues Wed Thurs Fri Sat Sun

24:00

Stop time

Start time

Time

17:30

8:15

0:00

Weekly t imer bit

In this example, the weekly timer turns ON every day from Tuesday to Friday between 8:15 and 17:30.

3-8-1 Settings in the Ladder Program Edit Screen

Weekly timer inputs are written in the Ladder Program Edit Screen. Settings are made in the Parameter Settings Screen.

Weekly timer address

Time up output

Weekly timer addresses @0 to @f (16 timers)

Note Only @0 to @7 (8 points) are supported by pre-V1 CPU Units.

3-8-2 Settings in the Parameter Settings Screen

Weekly timer address

Start day Stop day

Monitor enabled/disabled

Start time Stop time

Note When the flashing cursor is on the start day, press the Right But-

ton and then the Up/Down Buttons to set the stop day. If the stop day is not set, the timer will operate according to the set time only.

Day Start day Sun/Mon/Tues/Wed/Thurs/Fri/Sat

Stop day Sun/Mon/Tues/Wed/Thurs/Fri/Sat/None

Using Weekly Timers (@) Section 3-8

Time Start time 00:00 to 23:59

Stop time 00:00 to 23:59

Monitor enabled/disabled

Relationship between Start and Stop Days and Times

Setting and operation Setting

Start and stop day

Start and stop time

When start day is before stop day

When start day is after stop day

When start and stop days are the same

When stop day not set

When start time is before stop time

When start time is after stop time

When start and stop times are the same

A Operating parameters can be monitored

D Operating parameters cannot be moni-

example

MO - FR Operates Monday to Friday every week.

FR - MO Operates every Friday through to the following

SU - SU Operates regardless of the day of the week.

SU - Operates every Sunday only.

ON: 08:00 OFF: 17:00

ON: 21:00 OFF: 06:00

ON: 13:00 OFF: 13:00

and settings changed.

tored or settings changed.

Operation

Monday.

Operates 8:00 to 17:00 every day.

Operates 21:00 to 6:00 the next day.

Operates regardless of the time.

3-8-3 Parameter Monitor Screen Display

Start day

Stop time

Stop day

Current time

Weekly timer bit status ( : OFF/ : ON)

❍●

Start time

Current day

RUN

Using Calendar Timers (*) Section 3-9

3-9 Using Calendar Timers (*)

Calendar timers turn ON between specified dates. There are 16 calendar timers (*0 to *f).

Operation

Dec 31 End date Sep 1 Start date

3-9-1 Settings in the Ladder Program Edit Screen

Apr 1

Jan 1

Calendar timer bit

The calendar timer bit is ON between 1 April and 31 August.

Calendar timer inputs are written in the Ladder Program Edit Screen. Settings are made in the Parameter Settings Screen.

Calendar timer address

Time up output

Calendar timer address *0 to *f (16 timers)

Note Only *0 to *7 (8 points) are supported by pre-V1 CPU Units.

3-9-2 Settings in the Parameter Settings Screen

Calendar timer address

Monitor enabled/disabled Start date

Stop date

Start date Jan 1 to Dec 31

Stop date (See note.) Jan 1 to Dec 31

Monitor enabled/ disabled

A Operating parameters can be monitored and

settings changed.

D Operating parameters cannot be monitored or

settings changed.

Analog Inputs (Analog Comparators (A)) Section 3-10

Relationship between Start and Stop Dates

Setting and operation Setting

Start and stop date settings and operation

When start date is before stop date

When start date is after stop date

When start and stop dates are the same.

example

ON: 04/01 OFF: 09/01

ON: 12/26 OFF: 01/07

ON: 07/26 OFF: 07/26

Operates between 1 April and 31 August. (See note.)

Operates between 26 December and 6 January the following year.

Operates regardless of the date.

Operation

Note To stop operation on August 31, set the stop date to the following

day (September 1).

3-9-3 Parameter Monitor Screen Display

Current date

Calendar timer bit status ( : OFF/ : ON)

RUN

Start date Stop date

❍●

3-10 Analog Inputs (Analog Comparators (A))

Two analog voltage inputs between 0 and 10 V can be incorporated into the CPU Units with a DC power supply. I4 and I5 for CPU Units with 10 I/O points and Ia and Ib for CPU Units with 20 I/O points can be used as analog voltage inputs.

The analog input signal is converted to BCD (00.0 to 10.0). The results can be used with one of the comparators A0 to A3, and the 4 comparison outputs can be used as input conditions in the program.

Analog Inputs (Analog Comparators (A)) Section 3-10

+ −

Device with analog voltage output

COM

24 VDC

(DC power supply type) Analog input 1: I4 Analog input 2: I5

Note

Connect the negative side to COM for V1 CPU Units. The analog input circuit may be destroyed if the positive side is connected to COM.

Operation

•Example 1 (When comparison shows analog input 1 ³ 5.2 V)

Setting

10.5

10.0

Analog signal input:

0.0 to 10.0 V

24 VDC

+ −

20C1DR-D-V110C1DR-D-V1

Analog input: Ia Analog input: Ib

Converted value

Device with analog voltage output

COM

I0I1I2I3I4I

I6I7I8I9IaI

Q6Q

DC power supply type

•Example 2 (When comparison shows analog input 1 is £ analog input 2)

10.0

Analog input 1

5.2

00.0

Analog comparator bit

0.0

The analog comparator bit turns ON when the analog input voltage reaches is 5.2 V or higher.

Note Do not make negative signal inputs to analog inputs. If negative

Analog input 2

10.0 V

10.5 V

Input voltage

00.0

Analog comparator bit

The analog comparator bit turns ON when the analog input 2 voltage is higher than the analog input 1 voltage.

signals are made, the internal elements may be damaged.

Datasheet ZEN Datasheet (OMRON)

Specifications and Main Features

Frequently Asked Questions

User Manual

ZEN Programmable Relay

Terms and Conditions of Sale

PRECAUTIONS

1 Safety Precautions

2 Application Precautions

2-1 Circuit Design and Ladder Programming

2-2 Installation

2-3 Wiring and Connections

2-4 I/O Connections and Startup Precautions

2-5 Handling

2-6 Maintenance

2-7 Transportation and Storage

3 Operating Environment Precautions

4 Conformance to EC Directives

4-1 Applicable Directives

4-2 Concepts

4-3 Conformance to EC Directives

4-4 Relay Output Noise Reduction Methods

5 Operating Mode at Startup

6 Memory Backup

7 Version Upgrades

7-2 CPU Units Covered in this Manual

1-1 Outline

1-2 Features and Part Names

1-2-1 Features and System Configuration

1-2-2 Part Names

1-3 Display Screen and Basic Operations

1-3-1 Screens

1-3-2 Basic Operation

1-4 Memory Areas

1-5 Allocating I/O Bit Numbers

1-6 Preparations for Operation

2-1 Mounting

2-1-1 Installation Method

2-1-2 Connecting Expansion I/O Units

2-2 Wiring

3-1 Selecting Display Language

3-2 Setting the Date and Time

3-3 Creating Ladder Programs

3-3-1 I/O Wiring and Internal Operation

3-3-2 Clearing Programs

3-3-3 Writing Ladder Programs

3-4 Confirming Ladder Program Operation

3-5 Correcting Ladder Programs

3-5-1 Changing Inputs

3-5-2 Changing Additional Bit Output Functions

3-5-3 Deleting Inputs, Outputs, and Connection Lines

3-5-4 Inserting Lines

3-5-5 Deleting Blank Lines

3-6 Using Timers (T) and Holding Timers (#)

3-6-1 Settings in the Ladder Program Edit Screen

3-6-2 Settings in the Parameter Settings Screen

3-6-3 Parameter Monitor Screen Display

3-7 Using Counters (C)

3-7-1 Settings in the Ladder Program Edit Screen

3-7-2 Settings in the Parameter Settings Screen

3-7-3 Parameter Monitor Screen Display

3-8 Using Weekly Timers (@)

3-8-1 Settings in the Ladder Program Edit Screen

3-8-2 Settings in the Parameter Settings Screen

3-8-3 Parameter Monitor Screen Display

3-9 Using Calendar Timers (*)

3-9-1 Settings in the Ladder Program Edit Screen

3-9-2 Settings in the Parameter Settings Screen

3-9-3 Parameter Monitor Screen Display

3-10 Analog Inputs (Analog Comparators (A))