Rockwell Automation 1760-xxxx User Manual

Pico Controllers

Bulletin 1760

User Manual

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.ab.com/manuals/gi) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc. is prohibited.

Throughout this manual, when necessary we use notes to make you aware of safety considerations.

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

Identifies information that is critical for successful application and understanding of the product.

Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you:

• identify a hazard

• avoid a hazard

• recognize the consequence

Labels may be located on or inside the equipment (e.g., drive or motor) to alert people that dangerous voltage may be present.

Labels may be located on or inside the equipment (e.g., drive or motor) to alert people that surfaces may be dangerous temperatures.

Summary of Changes

The information below summarizes the changes to this manual since the last printing as publication 1760-UM001C-EN-P, April 2005.

To help you locate new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.

Catalog Number Release

The following table shows the history of Pico catalog numbers.

History

Description Released June 2000 Release August 2001 Release March 2005

120/240V ac Pico 1760-L12AWA 1760-L18AWA-EX 1760-L18AWA-EXND

1760-L12AWA-NC

1760-L12AWA-ND

1760-L18AWA

24V dc Pico 1760-L12BWB 1760-L12BWB-ND 1760-L12BBB

1760-L12BWB-NC 1760-L18BWB-EX 1760-L12BBB-ND

1760-L18BWB-EXND

1760-L18DWD-EX

1760-L20BBB-EX

1760-L20BBB-EXND

12V dc Pico 1760-L12DWD 1760-L18DWD-EXND

1760-L12DWD-ND

24V ac Pico 1760-L12NWN

1760-L12NWN-ND

1760-L18NWN-EX

1760-L18NWN-EXND

Expansion Modules 1760-IA12XOW6I 1760-IA12XOW4I

1760-IB12XOB8 1760-IB12XOW6I

Expansion Module Connector

Memory Modules 1760-MM1 1760-MM2B

Input/Output Simulator 1760-SIM

Programming Software 1760-PICOSOFT

Programming Cable 1760-CBL-PM02

(1) Included with expansion module. Catalog Number is listed as a replacement part.

1 Publication 1760-UM001D-EN-P - September 2005

(1)

1760-MM2

1760-RPLCONN

Summary of Changes 2

New Information

The table below lists sections where new information has been added.

For This New Information See

Changed Catalog Number 1760-L12NWA and 1760-L18NWA to 1760-L12NWN and 1760-L18NWN.

Changed inputs to 24V ac. page A-5

Throughout manual

Publication 1760-UM001D-EN-P - September 2005

Table of Contents

Preface

System Overview

Installation

Who Should Use this Manual. . . . . . . . . . . . . . . . . . . Preface-1

Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . Preface-1

Common Techniques Used in this Manual . . . . . . . . . Preface-2

Rockwell Automation Support . . . . . . . . . . . . . . . . . . Preface-3

Chapter 1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Hardware Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Chapter 2

Prevent Electrical Shock . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

European Communities (EC) Directive Compliance . . . . . . 2-2

Connect the Expansion Module . . . . . . . . . . . . . . . . . . . . . 2-3

Mount the Pico Controller . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Install the Remote Processor . . . . . . . . . . . . . . . . . . . . . . . 2-6

Wire Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Connect the Incoming Power . . . . . . . . . . . . . . . . . . . . . . 2-9

Use Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Connect the Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Connect Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Connect Relay Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Connect Transistor Outputs . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Commission the Pico

Draw a Circuit Diagram with Pico

Chapter 3

Power On Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Set the Menu Language . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Create a Circuit Diagram (Program) . . . . . . . . . . . . . . . . . . 3-4

Chapter 4

Pico Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Work with Contacts and Relays . . . . . . . . . . . . . . . . . . . . . 4-8

Function Relay Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Example with Timing and Counter Relays . . . . . . . . . . . . . 4-21

Timing Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Counter Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

High Speed Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36

Time Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42

Analog Comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47

Text Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50

Jumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53

Example Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55

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Table of Contents ii

Save and Load Circuit Diagrams

Pico System Settings

Chapter 5

Interface to Memory Module and Programming Cable . . . . 5-1

Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

PicoSoft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Chapter 6

Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Change the Menu Language . . . . . . . . . . . . . . . . . . . . . . . 6-6

Change Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Set Date, Time, and Daylight Saving Time . . . . . . . . . . . . . 6-9

Change Between Winter/Summer Time

(Daylight Saving Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Activate Debounce (Input Delay). . . . . . . . . . . . . . . . . . . . 6-10

Activate and Deactivate P-Buttons . . . . . . . . . . . . . . . . . . . 6-11

Start-Up Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

Set Cycle Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

Display Device Information . . . . . . . . . . . . . . . . . . . . . . . . 6-17

Retention

Inside Pico

Use of Expansion Modules

Troubleshoot Your Controller

Chapter 7

What is Retention?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Set Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Delete Retentive Actual Values . . . . . . . . . . . . . . . . . . . . . 7-2

Transfer Retentive Behavior. . . . . . . . . . . . . . . . . . . . . . . . 7-3

Retentive Auxiliary Relays (Markers) . . . . . . . . . . . . . . . . . 7-4

Retentive Timing Relays . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

Retentive Up/Down Counters C7 and C8 . . . . . . . . . . . . . . 7-14

Chapter 8

Circuit Diagram Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Determine Cycle Time of Circuit Diagrams. . . . . . . . . . . . . 8-3

Delay Times for Inputs and Outputs . . . . . . . . . . . . . . . . . 8-7

Chapter 9

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Module Status Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

Chapter 10

Messages from the Pico System . . . . . . . . . . . . . . . . . . . . . 10-1

Possible Situations When Creating Circuit Diagrams . . . . . . 10-2

Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

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DC Simulator

Specifications

Circuit Diagram Form

Table of Contents iii

Chapter 11

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Installation Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

Appendix A

Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . A-1

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Cycle Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13

Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14

Appendix B

Glossary

Index

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Table of Contents iv

Publication 1760-UM001D-EN-P - September 2005

Preface

Read this preface to familiarize yourself with the rest of the manual. It provides information concerning:

• who should use this manual

• the purpose of this manual

• related documentation

• conventions used in this manual

• Rockwell Automation support

Who Should Use this Manual

Purpose of this Manual

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Pico controllers.

You should have a basic understanding of electrical circuitry and familiarity with relay logic. If you do not, obtain the proper training before using this product.

This manual is a reference guide for Pico controllers. It describes the procedures you use to install, wire, and troubleshoot Pico.

Refer to publication 1760-GR001, Pico Controller Getting Results Manual for a basic overview of Pico and an introduction to Pico programming.

1 Publication 1760-UM001D-EN-P - September 2005

Preface 2

Related Documentation

The following documents contain additional information concerning Rockwell Automation products. To obtain a copy, contact your local Rockwell Automation office or distributor.

For Read this Document Document Number

A basic overview of Pico and an introduction to Pico programming. Pico Controller Getting Results

Manual

In-depth information on grounding and wiring Allen-Bradley programmable controllers

A description of important differences between solid-state programmable controller products and hard-wired electromechanical devices

An article on wire sizes and types for grounding electrical equipment National Electrical Code - Published by the National Fire

A complete listing of current documentation, including ordering instructions. Also indicates whether the documents are available on CD-ROM or in multi-languages.

A glossary of industrial automation terms and abbreviations Allen-Bradley Industrial Automation

Common Techniques Used in this Manual

The following conventions are used throughout this manual:

• Bulleted lists such as this one provide information, not

Allen-Bradley Programmable Controller Grounding and Wiring Guidelines

Application Considerations for Solid-State Controls

Protection Association of Boston, MA.

Allen-Bradley Publication Index SD499

Glossary

1760-GR001

1770-4.1

SGI-1.1

AG-7.1

procedural steps.

• Numbered lists provide sequential steps or hierarchical information.

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Preface 3

Rockwell Automation Support

Rockwell Automation offers support services worldwide, with over 75 Sales/Support Offices, 512 authorized Distributors and 260 authorized Systems Integrators located throughout the United States alone, plus Rockwell Automation representatives in every major country in the world.

Local Product Support

Contact your local Rockwell Automation representative for:

• sales and order support

• product technical training

• warranty support

• support service agreements

Technical Product Assistance

If you need to contact Rockwell Automation for technical assistance, please review the Troubleshooting section on page 10-1 in this manual first. Then call your local Rockwell Automation representative.

You can also find a local Rockwell Automation Technical Support contact at:

• http://support.automation.rockwell.com/contactinformation/

Your Questions or Comments on this Manual

If you find a problem with this manual, or you have any suggestions for how this manual could be made more useful to you, please contact us at the address below:

Rockwell Automation Control and Information Group Technical Communication, Dept. A602V P.O. Box 2086 Milwaukee, WI 53201-2086

or visit our internet page at: http://www.ab.com/pico or http://www.rockwellautomation.com

Publication 1760-UM001D-EN-P - September 2005

Preface 4

Publication 1760-UM001D-EN-P - September 2005

System Overview

Chapter

1

Overview

Pico is an electronic control relay with built-in logic, timer, counter, and real-time clock functions. Pico is a control and input device that can perform a variety of tasks in building and machine applications.

Pico is programmed using ladder diagrams. Each programming element is entered directly via the Pico display. For example, you can:

• connect make and break contacts in series and in parallel,

• connect output relays and markers,

• define outputs as relays, flip-flop relays or latching relays,

• select timing relays with different functions,

• assign eight up and down counters,

• display text with variables,

• track the flow of current in the program, and

• load, save and password-protect programs.

Most controllers also offer a real-time clock, allowing up to 32 separate on and off times.

The dc versions can receive analog signals at two inputs and evaluate the signals with eight analog comparators.

If you prefer to program Pico from a PC, use PicoSoft programming software. PicoSoft allows you to create and test your programs on the PC. It also enables you to print out your programs in DIN, ANSI or Pico format.

1 Publication 1760-UM001D-EN-P - September 2005

1-2 System Overview

Hardware Versions

Pico Controllers

7

8

7

8

8

1

Del

2

Alt

3 4

Esc

Del

Alt

Esc

Ok

Ok

5

6

5

3

5

Item Description

1 Incoming Power

2 Inputs

3 Status LED

4 Buttons

5 Socket for memory module or PC interface cable

6 Outputs

7 LCD display

8 Write-On Surface

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System Overview 1-3

Pico controllers are available for 12V dc, 24V dc, 24V ac and 120/240V ac operation and come in both 12-I/O and 18-I/O sizes. Pico is available with and without a real-time clock, and with and without a display and keypad. See the following table for details.

Catalog Number Inputs Outputs Line Power Real Time

Clock

Display and Keypad

Analog

1760-L12AWA 8 (100 to 240V ac) 4 (relay) 100 to 240V ac Yes Yes No

1760-L12AWA-NC

1760-L12AWA-ND

(1)

(2)

No Yes

Yes No

1760-L18AWA 12 (100 to 240V ac) 6 (relay) Yes Yes

1760-L18AWA-EX

(3)

1760-L18AWA-EXND

(2)(3)

Yes Yes

Yes No

1760-L12BWB 8 (24V dc) 4 (relay) 24V dc Yes Yes 2 (0 to 10V dc)

1760-L12BWB-NC

1760-L12BWB-ND

(1)

(2)

No Yes

Yes No

1760-L12BBB 4 (MOSFET) Yes Yes 2 (0 to 10V dc)

1760-L12BBB-ND Yes No

1760-L12NWN 8 (24V ac) 4 (relay) 24V ac Yes Yes

1760-L12NWN-ND Yes No

1760-L12DWD 8 (12V dc) 12V dc Yes Yes

1760-L12DWD-ND Yes No

1760-L18BWB-EX

(3)

1760-L18BWB-EXND

1760-L20BBB-EX

(3)

1760-L20BBB-EXND

1760-L18DWD-EX

(3)

1760-L18DWD-EXND

1760-L18NWN-EX

(3)

1760-L18NWN-EXND

12 (24V dc) 6 (relay) 24V dc Yes Yes

(2)(3)

6 (relay) Yes No 2 (0 to 10V dc)

8 (MOSFET) Yes Yes 4 (0 to 10V dc)

(2)(3)

8 (MOSFET) Yes No

12 (12V dc) 6 (relay) 12V dc Yes Yes

(2)(3)

6 (relay) 12V dc Yes No

12 (24V ac) 6 (relay) 24V ac Yes Yes 4 (0 to 10V dc)

(2)(3)

12 (24V ac) 6 (relay) Yes No

(1) NC = no real time clock

(2) ND = no display

(3) EX = suitable for use with expansion modules

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1-4 System Overview

Expansion Modules

3

3

Item Description

1 Incoming Power

2 Inputs

3 Write-On Surface

2

4

1

5

4 Outputs

5 Status LED

Use Pico expansion modules with Pico ’-EX’ models to increase your I/O capacity. The following modules are available.

Catalog Number Inputs Outputs Line Power

1760-IA12XOW6I 12 (100 to 240V ac) 6 (relay) 100 to 240V ac

1760-IA12XOW4I 12 (100 to 240V ac) 4 (relay) 100 to 240V ac

1760-IB12XOW6I 12 (24V dc) 6 (relay) 24V dc

1760-IB12XOB8 12 (24V dc) 8 (transistor) 24V dc

1760-OW2 - 2 (relay) 24V dc

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System Overview 1-5

Expansion modules connect directly to the Pico controller as shown below.

ATTENTION

(1)

Pico Controller: 1760-L18AWA-EX 1760-L18BWB-EX 1760-L18AWA-EXND 1760-L18BWB-EXND 1760-L18DWD-EX 1760-L20BBB-EX 1760-L20BBB-EXND

Expansion Module Connector (replacement part 1760-RPLCONN)

Expansion Module: 1760-IA12XOW6I 1760-IB12XOB8 1760-IA12XOW4IF 1760-IB12XOW6I 1760-OW2

(1) Included with expansion module. Catalog

Number is listed as a replacement part.

Electrical isolation is provided between the Pico controller and the expansion module as follows:

• Basic Isolation: 400V ac (+10%)

• Reinforced Isolation 240V ac (+10%)

(1)

(2)

The controller and expansion units may be destroyed if the potential between them exceeds the Basic Isolation value provided. This may cause your entire system or machine to malfunction.

(1) Basic Insulation - An insulation system which provides a minimal level of protection against electric shock up to

a stated voltage level. Refer to EN 61131-2 for additional information.

(2) Reinforced Insulation - An insulation system comprised of basic and supplemental insulation. This provides

protection against electric shock up to a stated voltage level and is tolerant of a single fault. Refer to EN 61131-2 for additional information.

TIP

The Pico controller and the expansion module can be of different voltage types.

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1-6 System Overview

Remote Processor

Remote Processor Features

1

2

1. 24V dc Voltage supply

Operating Principles

2. Interface Terminal (with cover) for connecting cable

Operating Buttons

Del

Esc

Alt

Button Function

Del Delete object in the circuit diagram

Alt Special functions in the circuit diagram

Cursor Buttons

Ok

Ok Next menu level, store your entry

Esc Previous menu level, cancel your entry

Move cursor

Select menu item

Choose contact numbers, values, times, etc.

Publication 1760-UM001D-EN-P - September 2005

Using Menus to Choose Values

Press To

Show system menu

Del

and

together

Ok

Esc

Alt

• Go to next menu level.

• Select menu item.

• Store your entry.

• Return to last menu level.

• Cancel your entry since the last Ok.

• Change menu item.

• Change value.

• Change position.

System Overview 1-7

Cursor Button Set to P-Button Function (if enabled)

• Left Arrow = Input P1

• Right Arrow = Input P3

• Up Arrow = Input P2

• Down Arrow = Input P4

Selecting the Main and System Menus

1760-L12xxx Status Display

Inputs

Outputs

I12345678

12:50

Q1234 RUN

Off

On

MO

Weekday

Tim e

RUN/STOP Mode

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1-8 System Overview

1760-L18xxx Status Display

Inputs

Weekday/Time

Outputs

12...........

MO 02:00

..34.... RUN

Inputs 1 and 2 ON Outputs 3 and 4 ON

RUN/STOP Mode

1760-L18xxx-EX and 1760-L20xxx Status Display for Expansion Module

Inputs

Expansion

Weekday/Time

Outputs

1..........12

RS

MO 10:42 ST

1.......8

RS = Expansion functioning correctly AC = AC expansion functioning correctly DC = DC expansion correctly

AC P-

AC Expansion OK/P Buttons

LED Indicators

Catalog numbers 1760-L12AWA-ND, 1760-L12BWB-ND, 1760-L18xxx, 1760-L20BBB-EXND, 1760-IA12XOW6I, 1760-IB12XOB8, 1760-IA12XOW4I and 1760-IB12XOW6I all feature an LED indicator on the front that shows the status of the incoming power as well as Run or Stop status.

Publication 1760-UM001D-EN-P - September 2005

LED Indicator Status Indicates

LED OFF No power

LED continuously lit Power present, Stop mode

LED flashing Power present, Run mode

Menu Structure

Main Menu Without Optional Password Protection

STOP: Circuit diagram menu RUN: Power flow display

System Overview 1-9

PROGRAM... STOP RUN

PARAMETER INFO... SET CLOCK

PROGRAM...

STOP RUN

PARAMETER

INFO... SET CLOCK

PROGRAM...

STOP RUN

PARAMETER

INFO... SET CLOCK

PROGRAM...

RUN

PARAMETER

INFO...

SET CLOCK

PROGRAM...

RUN PARAMETER INFO...

SET CLOCK

RUN

å

STOP

Circuit Diagram

PROGRAM

Parameter Display

Parameters

DELETE PROG CARD ...

PROGRAM

DELETE PROG

DELETE ?

CARD ...

PROGRAM

DELETE PROG

CARD ...

DEVICE->CARD

REPLACE ?

CARD->DEVICE

DELETE CARD

DEVICE->CARD

REPLACE ?

RUN

STOP

CARD->DEVICE

DELETE CARD

DEVICE->CARD

CARD->DEVICE

T1 X T2

Ü

C1 N O1

Parameter Display

S

M:S++

DELETE CARD

T1 X

+ +

S1 10.000 S2 +0

T:

Information Display of Device

+S

DELETE ?

DC TC LCD

OS: 1.00.027

CRC: 02752

SET CLOCK

SUMMER TIME

Display for Setting Clock

HH:MM --:--

DD.MM

YEAR

--.--

----

HH:MM 14:23

DD.MM

YEAR

17.03

2004

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1-10 System Overview

Main Menu Setting Summer Time

PROGRAM...

RUN PARAMETER INFO...

SET CLOCK

SET CLOCK

SUMMER TIME

SET CLOCK

SUMMER TIME

SET CLOCK

SUMMER TIME

SET CLOCK

SUMMER TIME

NONE

RULE... EU GB US

NONE

RULE...

EU GB US

NONE

RULE...

EU GB US

NONE

RULE...

EU GB US

å

SUMMER START

SUMMER END

AM -HH:MM --

--

DD.MM:00.00

HH.MM:00:00

DIFF: 0:00

SUMMER START

SUMMER END

SUMMER START

SUMMER END

AM -HH:MM --

--

DD.MM:00.00

HH.MM:00:00

DIFF: 0:00

Main Menu

PASSWORD...

RUN PARAMETER

INFO... SET CLOCK

PASSWORD...

RUN

Publication 1760-UM001D-EN-P - September 2005

Main Menu with Password Protection

Password Entry

Unlock

Password

Status Display

Correct Entry

Four Wrong Entries

DELETE ALL

System Menu

System Overview 1-11

System

sECURITY... SYSTEM...

LANGUAGE ... CONFIGURATOR

SECURITY...

SYSTEM...

LANGUAGE... CONFIGURATOR

SECURITY... SYSTEM...

LANGUAGE...

CONFIGURATOR

SECURITY... SYSTEM...

LANGUAGE...

CONFIGURATOR

Set Password

Change Password

DEBOUNCE OFF

P ON

STOP MODE

DEBOUNCE OFF

P ON

STOP MODE

DEBOUNCE OFF P ON

STOP MODE

DEBOUNCE OFF P ON

STOP MODE

RETENTION ON

ENGLISH

DEUTSCH

FRANCAIS

ESPANOL

ITALIANO

PORTUGUES

NEDERLANDS

SVENSKA

POLSKI

TURKCE

CESKY

MAGYAR

Password Entry

Password

RANGE...

ACTIVATE PW

CHANGE PW

Password RANGE...

DEBOUNCE OFF

DEBOUNCE ON

P ON

P OFF

MODE: STOP

MODE: RUN

(2)

RETENTION ON

RETENTION OFF

ENTER PASSW:

XXXX

ENTER PASSW:

XXXX

PROGRAM å

PARAMETER

CLOCK

OPRTNG MODE

INTERFACE DELETE FUNCT

(2)

(2)

(1) Only for Pico 1760-L18xxx (2) Only for Pico 1760-L12BWB-xx,

-L12DWD and -L18xxx.

CHANGE PW

ACTIVATE PW

CHANGE PW

ACTIVATE PW

PROGRAM å

PARAMETER å CLOCK å OPRTNG MODE å INTERFACE å DELETE FUNCT å

Publication 1760-UM001D-EN-P - September 2005

1-12 System Overview

Selecting or Toggling Between Menu Items

HH:MM 14:23

DD.MM

YEAR

HH:MM 14:23

DD.MM

YEAR

17.03

2004

17.03

2004

Cursor up or down

Select or Toggle

Ok

PROGRAM ...

RUN

PARAMETER

INFO

Highlighted choice flashes

Cursor Display

There are two different cursor types: flashing block and flashing cursor.

Full block navigation is shown as a flashing block:

• Move cursor with the left/right arrows

• In circuit diagram also with up/down arrows

Parameter change cursor flashes the selected parameter:

• Change position with left/right arrows

• Change values with up/down arrows

Publication 1760-UM001D-EN-P - September 2005

Flashing values/menus are highlighted in grey in this manual.

Setting Values

Change value = up/down arrows

Move cursor between parameters = left/right arrows

Stores Entries

Ok

Retain previous value

Esc

HH:MM 14:23

DD.MM

YEAR

Left/right arrow moves the cursor between the day and time digits. Up/down arrow changes the value of the parameter. Up arrow = increment Down arrow = decrement

17.03

2004

Installation

Pico is installed in the following order:

• connect devices together, if necessary

• Mount

• Use surge suppressors

• Wire the inputs

• Wire the outputs

• Connect incoming power

Chapter

2

Prevent Electrical Shock

ATTENTION

Follow these guidelines when you handle the controller:

• Remove power before working on any of the wiring to Pico.

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• If available, use a static-safe work station.

1 Publication 1760-UM001D-EN-P - September 2005

2-2 Installation

European Communities (EC) Directive Compliance

If this product has the CE mark it is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

This product is tested to meet the Council Directive 89/336/EC Electromagnetic Compatibility (EMC) by applying the following standards, in whole or in part, documented in a technical construction file:

• EN 50081-1 EMC — Generic Emission Standard, Part 1 — Residential, Commercial, and Light Industry

• EN 50082-2 EMC — Generic Immunity Standard, Part 2 — Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 50178 Electric Equipment for Power Installations Equipment Requirements and Tests. For specific information required by EN 50178, see the appropriate sections in this publication, as well as the Allen-Bradley publication Industrial Automation Wiring and Grounding Guidelines For Noise Immunity, publication 1770-4.1.

This equipment is classified as open equipment and must be mounted in an enclosure during operation to provide safety protection.

Publication 1760-UM001D-EN-P - September 2005

Installation 2-3

Connect the Expansion Module

Connect the expansion module to the controller using the connector as shown below:

1

2

See Expansion Modules on page 1-4 for information on using the modules with your Pico controller.

Mount the Pico Controller

Install Pico in an enclosure, switch cabinet, or distribution board so that the power feed and terminal connections cannot be touched accidentally during operation.

Clip Pico onto a DIN rail or install directly onto a panel using the mounting feet. Pico can be mounted either vertically or horizontally.

TIP

When using a Pico expansion module, connect the expansion module and Pico controller together before mounting. See Connect the Expansion Module.

Publication 1760-UM001D-EN-P - September 2005

2-4 Installation

Minimum Spacing

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 3 cm (1.18 in.) of space on all sides for adequate ventilation, as shown:

3 cm (1.18 in.)

3 cm (1.18 in.)

3 cm (1.18 in.)

3 cm (1.18 in.)

DIN Rail Mount

1. Mount your DIN rail. Make sure that the placement of the Pico

unit on the DIN rail meets the recommended spacing requirements.

2. Hook the top slot over the DIN rail.

3. While pressing the Pico unit down against the top of the rail,

snap the bottom of the unit into position. Ensure DIN latches are in the up (secured) position.

Pico can be mounted vertically on a DIN rail in the same manner.

Publication 1760-UM001D-EN-P - September 2005

Install on a Mounting Plate

To install the unit using mounting screws:

1. Snap the mounting feet in place.

2. Drill holes at the mounting feet positions, shown below.

3. Mount the controller.

Click

Installation 2-5

1760-L18xxx, 1760-L20xxx and Expansion Modules

1760-OW2

1760-L12xxx

For mounting dimensions, see Dimensions on page A-14.

Publication 1760-UM001D-EN-P - September 2005

2-6 Installation

Install the Remote Processor

The remote processor is used for terminal mode operation of Pico controllers and I/O modules. The remote processor is used with either a Display or Display/Keypad Unit.

Remote Processor Terminal Operation

1760-L18... 1760-L20...

LED

LA T

E

S C

O

K

1760-RM-GFX

1760-LDF

...

1760-GFX Display Unit Front View

1760-RM

1760-L12...

D E

L

LA

T

E S

C

O

K

1760-RM-Pico

Flush Mount

Flush Mount the Display and Remote Processor

3

2

1

2

1. Insert the display unit through the mounting holes on the panel.

2. Attach the fixing rings.

3. Attach the processor unit.

M = 1.2 – 2 Nm

10.6 - 17.7 lb-in

Publication 1760-UM001D-EN-P - September 2005

Removal Procedure

Remove the Remote Processor

3

2

1

1760 -RM

1. Insert the screwdriver into the mounting slide.

2. Push screwdriver to the right to open the slide.

Installation 2-7

3. Remove the processor unit from the display unit.

4. Loosen the fixing rings.

5. Remove the display unit from the panel.

Make Connections

Connect the Power Supply

Remote Processor Power Supply Connection

1760-RM…

L01+ L02+

L01–

> 1 A

Ue = 24 V dc (20.4 – 28.8 V H dc)

Ie = 150 mA

0.6 x 3.5 x 100 0V24V

Publication 1760-UM001D-EN-P - September 2005

2-8 Installation

Connect the Serial Cable

4

1

Wire Terminals

1760-RM cable

2

X5

X4

X3

X2

X1

3

Cable Wire Color Code

X5

green X4 white X3 yellow X2 brown X1 gray

1. Remove the interface cover.

2. Using a screwdriver, push on the terminal latch.

3. Insert each wire into its designated terminal on the interface

connector.

4. Replace the interface cover.

Plug the other end of the cable into the Pico controller or I/O module.

Required Tools

Publication 1760-UM001D-EN-P - September 2005

Slot-head screwdriver (width: 3.5 mm, torque: 0.57 to 0.79 Nm [5 to 7 in-lb])

Wire Size

• Solid AWG 22 to AWG 12

• Stranded AWG 22 to AWG 12

Installation 2-9

Connect the Incoming Power

For incoming power technical specifications, refer to Appendix A.

ATTENTION

ELECTRICAL SHOCK HAZARD

The memory module and PC-cable socket are at the potential of L2. There is a danger of electric shock if L2 is not grounded. Do not make contact with electrical components under the socket cover.

TIP

A brief current surge is produced when powering on the unit for the first time. Do not switch the unit using reed contacts, since these may burn or melt.

1760-L12AWA, -L12AWA-NC, -L12AWA-ND, -L18AWA,

L1

L2

F1

L1 L2 I2 I3 I4 I5 I6 I7 I8I1

100 - 240V ac

50/60Hz

Inputs x 100 - 240V ac

Publication 1760-UM001D-EN-P - September 2005

2-10 Installation

1760-IA12XOW6I Expansion Module

L1

L2

F1

NCNC R2 R3 R4 R5 R6 R7 R8R1 R9 R10 R11 R12 L1

Inputs x 100 to 240V ac

1760-L12BWB, -L12BWB-NC, -L12BWB-ND, -L18BWB-EX

+24V

0V

F1

+24 V COM I2 I3 I4 I5 I6 I7 I8I1

24V dc

Inputs x 24V dc (I7,I8 0 to 10V)

L2

100 to 240V ac

50/60Hz

Publication 1760-UM001D-EN-P - September 2005

1760-IB12XOB8 Expansion Module

+24V dc

0V dc

Installation 2-11

F1

NCNC R2 R3 R4 R5 R6 R7 R8R1 R9 R10 R11 R12 +24V

1760-L12DWD

+12V dc

0V

F1

+12 V COM I2 I3 I4 I5 I6 I7 I8I1

12V dc

Inputs x 24V dc

Inputs x 12V dc

COM

24V dc

The dc controllers are protected against polarity reversal. To ensure that the unit works correctly, ensure that the polarity of each terminal is correct.

Wiring Protection

Both AC and DC versions require wiring protection (F1) rated for at least 1 A (slow).

When the unit is powered on for the first time, the power supply circuit draws a larger surge current than usual. Use an appropriate device for switching on the incoming power and do not use any reed relay contacts or proximity switches.

Publication 1760-UM001D-EN-P - September 2005

2-12 Installation

Use Surge Suppressors

Inductive load devices, such as motor starters and solenoids, require the use of some type of surge suppression to protect and extend the operating life of the controller’s output contacts. Switching inductive loads without surge suppression can SIGNIFICANTLY reduce the life expectancy of relay contacts. By adding a suppression device directly across the coil of an inductive device, you prolong the life of the output or relay contacts. You also reduce the effects of voltage transients and electrical noise from radiating into adjacent systems.

The following diagram shows an output with a suppression device. We recommend that you locate the suppression device as close as possible to the load device.

ac or dc Outputs

+dc or L1

VAC/DC

Out 0 Out 1 Out 2 Out 3 Out 4 Out 5

Out 6 Out 7

COM

Suppression Device

dc COM or L2

If the outputs are dc, we recommend that you use an 1N4004 diode for surge suppression, as shown below.

+24V dc

VAC/D Out 0

Out 1

Relay or Solid State dc Outputs

Out 2 Out 3 Out 4

Out 5

Out 6

Out 7 COM

IN4004 Diode

24V dc common

Suitable surge suppression methods for inductive ac load devices include a varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below. These components must be appropriately rated to suppress the switching transient characteristic of the particular inductive device. See the table on page 2-14 for recommended suppressors.

Publication 1760-UM001D-EN-P - September 2005

Surge Suppression for Inductive ac Load Devices

Installation 2-13

Output Device

Varistor RC Network Surge

Output Device

For inductive dc load devices, a diode is suitable. A 1N4004 diode is acceptable for most applications. A surge suppressor can also be used. See the table on page 2-14 for recommended suppressors.

As shown in the illustration below, these surge suppression circuits connect directly across the load device.

Surge Suppression for Inductive dc Load Devices

_

Output Device

+

Output Device

Suppressor

Diode

(A surge suppressor can also be used.)

Publication 1760-UM001D-EN-P - September 2005

2-14 Installation

Recommended Surge Suppressors

Use the Allen-Bradley surge suppressors shown in the following table for use with relays, contactors, and starters.

Suppressor Device Coil Voltage Catalog Number

Bulletin 509 Motor Starter Bulletin 509 Motor Starter

Bulletin 100 Contactor Bulletin 100 Contactor

120V ac 240V ac

120V ac 240V ac

599-K04 599-KA04

199-FSMA1 199-FSMA2

Bulletin 709 Motor Starter 120V ac 1401-N10

Bulletin 700 Type R, RM Relays ac coil None Required

Bulletin 700 Type R Relay Bulletin 700 Type RM Relay

Bulletin 700 Type R Relay Bulletin 700 Type RM Relay

Bulletin 700 Type R Relay Bulletin 700 Type RM Relay

Bulletin 700 Type R Relay Bulletin 700 Type RM Relay

Bulletin 700 Type R Relay Bulletin 700 Type RM Relay

12V dc 12V dc

24V dc 24V dc

48V dc 48V dc

115-125V dc 115-125V dc

230-250V dc 230-250V dc

700-N22 700-N28

700-N10 700-N13

700-N16 700-N17

700-N11 700-N14

700-N12 700-N15

Bulletin 700 Type N, P, or PK Relay 150V max, ac or DC 700-N24

Miscellaneous electromagnetic

150V max, ac or DC 700-N24

devices limited to 35 sealed VA

Connect the Inputs

Publication 1760-UM001D-EN-P - September 2005

Pico inputs switch electronically. Once you have connected a device via an input terminal, you can reuse it as a relay contact in your program as often as you like.

L1

+24 V

S1

L2 com

I1

I1

I1

Connect devices such as buttons or switches to Pico input terminals.

Connecting AC Inputs

Installation 2-15

ATTENTION

For Pico controllers with ac inputs, connect the inputs to the same phase as the power feed L1, in accordance with VDE, IEC, UL and CSA safety regulations. Otherwise, Pico may not detect the switching level or, it may be damaged by excess voltage.

Input Specification

Input Signal Voltage Range

Input Current I1 to I6, I9 to I12, R1 to R12: 0.25 mA at 120V ac, 0.5 mA at 240V ac

Example Using 1760-L12AWA

L1 L2

OFF signal: 0 to 40V ac

ON signal: 79V to 264V ac

I7 and I8: 4 mA at 120V ac, 6 mA at 240V ac,

F1

L1 L2 I2 I3 I4 I5 I6 I7 I8I1

100 to 240V ac

50/60Hz

Example Using 1760-IA12XOW6I

F1

L1

L2

NCNC R2 R3 R4 R5 R6 R7 R8R1 R9 R10 R11 R12 L1

Inputs x 100 to 240V ac

Inputs x 120/240V ac

Publication 1760-UM001D-EN-P - September 2005

120/240V ac

L2

50/60Hz

2-16 Installation

Wire Lengths

Severe electromagnetic interference to wires can cause inputs to signal 1 without the proper signal being applied. Observe the following maximum cable lengths:

• I1 to I6, I9 to I12, R1 to R12: 40m (130 ft) without additional circuits

• I7 and I8: 100m (330 ft) without additional circuits

ATTENTION

Do not use reed relay contacts on I7 or I8. These may burn or melt due to the high current of I7 and I8.

Two-wire proximity sensors have a residual off-state leakage current. If this residual current is too high, the input may indicate the input is ON when the device is actually off.

Use inputs I7 and I8 for these types of input devices. If more inputs are required, use a bleeder resistor or bleeder capacitor for inputs I1 through I6, and I9 through I12.

Increase the Input Current

Use the following input circuit for electrical noise immunity and when using two-wire proximity switches:

L1 L2

Publication 1760-UM001D-EN-P - September 2005

1A

30K Ω, 5W resistor; or 100 nF, 275V ac capacitor

L1 L2 I2 I3 I4 I5 I6 I7 I8I1

100 to 240V ac

50/60Hz

Inputs x 100 to 240V ac

When using a 100 nF capacitor, the drop-off time of the input increases by 66.6 ms at 60 Hz (80 ms at 50 Hz). Also, a capacitor increases the amount of current seen by the input device. Do not use a bleeder capacitor in conjunction with reed switches.

Installation 2-17

To limit the current to 400 mA, connect a 1K Ω resistor in series upstream from the circuit as shown.

.

L1

L2

1A

1K Ω

0.25W resistor

L1 L2 I2 I3 I4 I5 I6 I7 I8I1

100 to 240V ac

50/60Hz

100 nF, 275V ac capacitor

Inputs x 100 to 240V ac

Connect 24 V dc Inputs

Use input terminals I1 to I8 (or I12 for 18-point Pico) to connect push-buttons, switches, or 3- or 4-wire proximity switches. Given the high off-state leakage current, do not use 2-wire proximity switches.

Input Specification

Input Signal Voltage Range OFF signal: 0 to 5V dc

ON signal: 15V to 28.8V dc

Input Current I1 to I6, I9 to I12, R1 to R12: 3.3 mA at 24V dc

I7 and I8: 2.2 mA at 24V dc

Example Using 1760-L12BWB-xx

+24V 0V

1A

+24 V COM I2 I3 I4 I5 I6 I7 I8I1

24V dc

Inputs x 24V dc (I7,I8 0 to 10V)

Publication 1760-UM001D-EN-P - September 2005

2-18 Installation

Example Using 1760-IB12XOB8

+24V dc

F1

0V

NCNC R2 R3 R4 R5 R6 R7 R8R1 R9 R10 R11 R12 +24V

Inputs x 24V dc

COM

24V dc

Connect 12 V dc Inputs

Use input terminals I1 to I8 to connect push-buttons, switches, or 3 or 4-wire proximity switches. Given the high off-state leakage current, do not use 2-wire proximity switches.

Input Specification

Input Signal Voltage Range OFF signal: 0 to 4V dc

ON signal: 8V to 15.6V dc

Input Current I1 to I6, I9 and I10: 3.3 mA at 12V dc

I7 and I8, I11 and I12: 1.1 mA at 12V dc

Example Using 1760-L12DWD

+12V dc

0V

1A

+12 V COM I2 I3 I4 I5 I6 I7 I8I1

12V dc

Inputs x 12V dc

Publication 1760-UM001D-EN-P - September 2005

Installation 2-19

Connect Analog Inputs (1760-LxxBWB-xx or 1760-LxxDWD only)

Inputs I7 and I8, and if present I11 and I12, can also be used to connect analog devices ranging from 0 to 10V dc.

ATTENTION

Analog signals are more sensitive to interference than digital signals. Consequently, more care must be taken when routing and connecting the signal lines. Route the analog wiring:

• away from power lines, load lines and other sources of electrical noise such as hard-contact switches, relays, and AC motor drives

• away from sources of radiated heat

Incorrect switching states may occur if the analog wiring is not installed correctly.

Use shielded, twisted-pair cables to prevent interference with the analog signals. For short cable lengths, ground the shield at both ends with a large contact area. If the cable length exceeds 30m (98.4 ft), grounding at both ends can result in ground loops between the two grounding points and thus to the interference of analog signals. In this case, only ground the cable at one end. Do not route signal lines parallel to power cables.

Connect inductive loads to be switched via Pico outputs to a separate power feed, or use a suppressor circuit for motors and valves. If loads such as motors, solenoid valves or contactors are operated via the same power feed, switching may result in interference on the analog input signals.

Publication 1760-UM001D-EN-P - September 2005

2-20 Installation

The following four circuits illustrate application examples for analog value processing.

Ensure that the reference potential is connected. Connect the 0V of the power supply unit for the different setpoint potentiometers and sensors to the 0V of the power feed.

Setpoint Potentiometers

V dc 0V

F1

V dc COM I2 I3 I4 I5 I6 I7 I8I1

V dc

V dc = 12Vdc for 1760-L12DWD V dc = 24V dc for 1760-LxxBWB-xx

Inputs x V dc (I7,I8 0 to 10V)

~

0V

+12V

Use a potentiometer with a resistance of less than or equal to 1K Ω, e.g. 1K Ω, 0.25W.

Light Intensity Sensors

V dc 0V

12V

F1

0 to 10V

0V

~

0V

+12V

Publication 1760-UM001D-EN-P - September 2005

V dc COM I2 I3 I4 I5 I6 I7 I8I1

V dc

V dc = 12Vdc for 1760-L12DWD V dc = 24V dc for 1760-LxxBWB-xx

Inputs x V dc (I7,I8 0 to 10V)

Temperature Sensors

Installation 2-21

V dc 0V

V dc = 12Vdc for 1760-L12DWD V dc = 24V dc for 1760-LxxBWB-xx

20 mA Sensors

V dc

0V

F1

V dc COM I2 I3 I4 I5 I6 I7 I8I1

V dc

1A

+V dc

-0V

Out 0 to 10V

Inputs x V dc (I7,I8 0 to 10V)

4 to 20 mA

(12V dc or 24V dc)

-35 to +55˚C (-31 to +131˚F)

500Ω

V dc COM I2 I3 I4 I5 I6 I7 I8I1

V dc

V dc = 12Vdc for 1760-L12DWD V dc = 24V dc for 1760-LxxBWB-xx

Inputs x V dc (I7,I8 0 to 10V)

Connect 4 to 20 mA (0 to 20 mA) sensors using an external 500Ω resistor, as shown above. The resultant impedance to the sensor is approximately 478Ω.

The following values result (Based on V = R x I = 478Ω x 10 mA =

4.8V dc):

• 4 mA = 1.9V dc

• 10 mA = 4.8V dc

• 20 mA = 9.5V dc

Publication 1760-UM001D-EN-P - September 2005

2-22 Installation

Connect Outputs

The Q output terminals function as isolated contacts, as shown below.

Q1

Q1

12

Q1

Outputs are controlled via the corresponding output relays:

• Q1 to Q4

• Q1 to Q8

• S1 to S6

• S1 to S8

You can use the signal states of the output relays as make or break contacts in the Pico program to provide additional logic conditions.

The relay or transistor outputs are used to switch loads such as fluorescent tubes, filament bulbs, contactors, relays or motors. Check the technical thresholds and output data before installing such devices (see Relay Outputs on page A-10).

Connect Relay Outputs

1760-L12AWA-xx, 1760-L12BWB-xx and 1760-L12DWD

.

10 000 000

0 V , N

< 8 A / B 16

L1, L2, L3 (120/240V) + 24 V

1

2

Q1

1

2

2

1

Q3 Q4

Q2

2

1

R

24 V 8 A 120 V 8 A 240 V 8 A

1000 W

10 x 58 W

L

2 A 2 A 2 A

25.000

Publication 1760-UM001D-EN-P - September 2005

1760-L18AWA-xx and 1760-L18BWB-EX

Installation 2-23

10 000 000

0 V , N

< 8 A / B 16

L1, L2, L3 (120/240 V)

+ 24 V

1760-IA12XOW6I

10 000 000

0 V , N

< 8 A / B 16

L1, L2, L3 (120/240 V)

+ 24 V

12 2 2 2 2 2

S1

S2

12 2 2 2 2 2

S1

S2

1

1

1

1

1

1

S6S5S4S3

1

1

S6S5S4S3

1

1

R

24 V 120 V 8 A 240 V 8 A

1000 W

10 x 58 W

R

24 V 120 V 8 A 240 V 8 A

1000 W

10 x 58 W

8A

8A

2A 2A 2A

2A 2A 2A

25.000

25.000

1760-OW2

Unlike inputs, you can connect different phases to the outputs.

.

ATTENTION

Do not exceed the maximum voltage of 250V ac on a relay contact.

If the voltage exceeds this threshold, arcing may occur at the contact, resulting in damage to the device or to a connected load.

Publication 1760-UM001D-EN-P - September 2005

2-24 Installation

Connect Transistor Outputs

1760-Ixxx

1760-Ixxx

0 V Q1 Q2 Q3 Q4

+24 V

Q

F 10 A

0 V H

f 2.5 A + 24 V H

20.4 – 28.8 V H

+24 V 0 V Q1 Q2 Q3Q4Q5Q6Q7

Q

24 V

Q

Q

5 W/24 V

0.5 A

R

L

0.5 A

Q8

1760-IB12XOB8

F 10 A

0 V H

f 2.5 A

0V

24V 0.5A 0.5A

+ 24 V H

(20.4 – 28.8 V H)

R

24 V H

S1 S2 S3 S4 S5 S6 S7 S8

5W/24V

0.5 A

R

2.5A

≤

0.5 A

5 W/24 V

+24V dc

+ 24V dc

(20.4-28.8V dc )

COM

10A

Publication 1760-UM001D-EN-P - September 2005

Installation 2-25

Parallel Connection

Up to four outputs can be connected in parallel in order to increase the load current. The output current will increase to a maximum of 2A.

ATTENTION

Outputs may only be connected in parallel within a group (S1 to S4) or (S5 to S8) such as (S1 and S3) or (S5, S7 and S8). Outputs connected in parallel must be switched ON and OFF at the same time.

Switch Inductive Loads

ATTENTION

If inductive loads are not suppressed, only one inductive load should be switched off at any one time to prevent the output transistors from overheating. If, in the event of an emergency stop, the +24V dc power supply is to be switched off by means of a contact, and this would mean switching off more than one controlled output with an inductive load, then you must provide suppressor circuits for these loads. See the following diagrams.

Observe the following when switching off inductive loads:

Suppressed inductive loads cause less interference in the entire electrical system. For optimum suppression, the suppressor circuits are best connected directly to the inductive load. See Use Surge Suppressors on page 2-12.

+24V

0V

S

Ue max. < Uz < 33V

S

0 V

Publication 1760-UM001D-EN-P - September 2005

2-26 Installation

Short Circuit and Overload Behavior

If a short circuit or overload occurs on a transistor output, this output will switch off. The output will switch on up to maximum temperature after the cooling time has elapsed. This time depends on the ambient temperature and the current involved. If the fault condition persists, the output will continue to switch off and on until the fault is corrected or until the power supply is switched off.

For information on using the 1760-IB12XOB8 expansion module to monitor outputs for a fault, see Monitor for Short Circuit or Overload on page 9-4.

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Commission the Pico

Chapter

3

Power On Unit

Before powering up Pico, check that you have connected the power supply terminals and inputs correctly.

12V dc version:

• +12V terminal: +12V dc voltage

• COM terminal: 0V voltage

• terminals I1 to I8: actuation via +12V dc

24V dc version:

• +24V terminal: +24V dc voltage

• COM terminal: 0V voltage

• terminals I1 to I12, R1 to R12: actuation via +24V dc

100 to 240V ac version:

• terminal L1: phase conductor L1

• terminal L2: neutral conductor L2 (grounded)

• terminals I1 to I12, R1 to R12: actuation via phase conductor L1

ATTENTION

1 Publication 1760-UM001D-EN-P - September 2005

If you have already installed Pico into a system, ensure that the working area of all connected devices is secure. Advise all personnel of start-up to avoid injury in the event of unexpected operation.

3-2 Commission the Pico

Set the Menu Language

When you power-up Pico for the first time, you are asked to select the menu language.

Use the up and down cursor buttons to select a language. Definitions of the language abbreviations are shown below.

Language LCD display Abbreviaton

English ENGLISH GB

German DEUTSCH D

French FRANCAIS F

Spanish ESPANOL E

Italian ITALIANO I

Portuguese PORTUGUES –

Dutch NEDERLANDS –

Swedish SVENSKA –

Polish POLSKI –

Turkish T UR KCE –

Czech CESKY –

Hungarian MAGYAR –

Press Ok to confirm your choice or press Esc to exit the menu. The unit then switches to the status display. You can also change the language setting at a later date, see Chapter 6 for more information.

If you do not set the language, Pico displays this menu and waits for you to select a language every time the unit is powered up.

ENGLISH

DEUTSCH

FRANCAIS

ESPANOL

ITALIANO

PORTUGUES

NEDERLANDS

SVENSKA

POLSKI

TURKCE

CESKY

MAGYAR

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Commission the Pico 3-3

Modes of Operation

Pico has two operating modes: Run and Stop.

In Run mode, the unit continuously processes a stored program or circuit diagram until you select Stop or disconnect the power. The circuit diagram, parameters, and settings are retained in the event of a power failure. If the back-up time has elapsed after a power failure, you will need to reset the real-time clock. Circuit diagram entry is only possible in Stop mode.

ATTENTION

In Run mode, Pico immediately runs the circuit diagram saved in the unit when the incoming power is turned on. This happens unless Stop mode was set as start-up mode. In Run mode, outputs are activated according to the program.

In models with an LCD display, a circuit diagram inside an installed memory module is not run automatically. The circuit diagram must first be transferred from the memory module to the unit.

In Run mode, the 1760-L12xxx-ND and 1760-L18xxx-xxND load the circuit diagram from the memory module automatically and run it immediately.

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3-4 Commission the Pico

Create a Circuit Diagram (Program)

The following small circuit diagram example takes you step-by-step through programming your first Pico circuit diagram. This example demonstrates most of the basic programming rules.

As with conventional wiring, you use contacts and relays in the Pico circuit diagram. With Pico, however, you no longer have to connect components individually. With the push of a few buttons, the Pico circuit diagram produces all the wiring. All you have to do is connect any switches, sensors, lamps or contactors you wish to use.

+24V dc 0V dc

S1

S2

CR1

CR1

M1

In the following example, Pico carries out all the wiring and performs the tasks of the circuit diagram shown above.

.

+24V

0V

F1

S1

S2

I1

com

+24V

Q1

2

1

H1

0V

I2

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..............

I

MO 02:00

......... STOP

Expansion Module Status Screen

1..........12

RS

MO 10:42 ST

1.......8

AC P-

Commission the Pico 3-5

Start Point: Status Display

When you power up the unit, it opens the status display immediately to show the state of the inputs and outputs. It also indicates whether Pico is already running a program.

Press Ok to switch to the main menu. If there is an expansion module installed, the expansion module status screen is displayed. Press Ok again to switch to the main menu.

You can then press Ok to move forward to the next menu level or Esc to go back one level. Ok has two other functions:

• Press Ok to save modified settings.

• Press Ok to insert and modify contacts and relay coils. In this

case, Pico must be in Stop mode.

Press Ok two times (3 times with an expansion module installed) to enter the circuit diagram display from the status display(s). This is where you create the circuit diagram.

I1-I2-----{Q1

Circuit Diagram Display

.The circuit diagram display is currently empty. The cursor is flashing at the top left, which is where you start to create your program

Move the cursor, using the cursor buttons, across the hidden grid lines

The first three double columns are contact fields and the right-hand triple column forms the coil field. Each line is a circuit connection. Pico adds the first contact automatically.

Now try to program the following Pico circuit diagram.

Switches S1 and S2 are wired to inputs I1 and I2. Relay K1 is represented by the relay coil {Q1. The symbol “{” identifies the coil's function, in this case a relay coil acting as a contactor. Q1 is one of up to six Pico output relays.

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3-6 Commission the Pico

From the First Contact to the Output Coil

With Pico, you work from the input to the output.

1

I

I1 I1

1. The first input contact is I1. Press Ok. Pico inserts the first

contact I1 at the cursor position.

The ’I’ flashes and can be changed, for example, to a ’P’ for a button input using the up or down cursor buttons. However, nothing needs to be changed at this point.

2. Press Ok twice to move the cursor across the 1 to the next

contact field.

You could also move the cursor to the next contact field using the right cursor button.

3. Press Ok.

Again, Pico creates a contact I1 at the cursor. Change the contact number to I2 since break contact (normally closed) S2 is connected to input terminal I2.

4. Press Ok. Then, press the up or down cursor button to change

the number to 2. Press DEL to delete a contact at the cursor position.

I1-I2

5. Press Ok to move the cursor to the third contact field. You do

not need a third relay contact, so you can now wire the contacts directly to the coil field.

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Commission the Pico 3-7

Wire Inside of Your Program

Pico displays a small arrow when creating a circuit connection.

Pressing Alt activates the arrow and the cursor buttons to move it. Alt also has two other functions:

• From the left contact field, press Alt to insert a new, empty circuit connection (rung).

• Press Alt to set the contact currently under the cursor to either a make or break contact.

The wiring arrow works between contacts and relays. When you move the arrow onto a contact or relay coil, it changes back to the cursor and can be reactivated with Alt if required. Pico automatically wires adjacent contacts in a circuit connection up to the coil.

1. Press Alt to wire the cursor from I2 through to the coil field.

The cursor changes into a flashing wiring arrow and automatically jumps to the next possible wiring position.

2. Press the right cursor button.

Contact I2 is connected up to the coil field. Use the Del button to delete wiring at the cursor or arrow position. Where connections intersect, the vertical connections are deleted first, then, if you press Del again, the horizontal connections are deleted.

3. Press the right cursor button again.

The cursor will move to the coil field.

4. Press Ok.

Pico inserts relay coil Q1. The specified coil function ’

{’ and the output relay Q1 are

correct and do not have to be changed.

Your first working Pico circuit diagram now

I1-I2-----{ Q 1

looks like this:

5. Press Ok. Then press Esc to leave the circuit

diagram display. The diagram will be automatically saved.

Once you have connected buttons S1 and S2, you can test your circuit diagram.

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I1-I2-------{Q1

3-8 Commission the Pico

Test the Circuit Diagram

PROGRAM...

STOPå RUN

PARAMETER

INFO...

1. Switch to the main menu and select the RUN menu option

(press Esc to go back to the Main Menu and use the arrow keys to highlight RUN).

2. Toggle between RUN and STOP to set the operating mode

required (use the Ok button to toggle between RUN and STOP).

Pico is in Run mode if the STOP menu option is displayed. Menu options that toggle between two functions always show the next possible setting.

The status display shows the current mode and the switching states of the inputs and outputs.

3. Change to the Status display by pressing Esc and actuate

push-button S1.

Pico 1760-L12xxx Pico 1760-L18xxx

I12345678

MO

12:50

Q1234 RUN

12..........

MO 02:00

1..........RUN

I1-I2-------{Q1

I1-I2-------{Q1

The boxes for inputs I1 and I2 are activated and relay Q1 is energized.

Power Flow Display

Pico allows you to check programs in Run mode. This means that you can check your circuit diagram via the built-in power flow display while it is being processed by Pico.

1. Press Ok twice to change to the Circuit diagram display and

actuate push-button S1.

The relay energizes and Pico shows the flow of current.

2. Press push-button S2, that has been connected as a break

contact.

The circuit connection is interrupted and relay Q1 drops out.

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PROGRAM

DELETE PROG

Commission the Pico 3-9

3. Press Esc to return to the Main Menu. A circuit diagram does not

have to be completed before you can test parts of it with Pico.

Pico simply ignores any incomplete wiring that is not yet working and only uses the finished wiring.

Delete a Circuit Diagram

1. Switch Pico to Stop mode.

The RUN option is displayed. Pico must be in Stop mode in order to extend, delete or modify the program.

2. Select ’PROGRAM’. Press Ok to switch from the main menu to

the next menu level.

3. Select ’DELETE PROG’

Pico displays the prompt ’DELETE?’.

4. Press Ok to delete the program or Esc to cancel.

5. Press Esc to return to the Main Menu.

Fast Circuit Diagram Entry

You can create a circuit diagram in several ways. The first option is to enter the elements in the circuit diagram and then wire all the elements together. The other option is to use the enhanced operator guidance and create the circuit diagram, from the first contact through to the last coil.

If you use the first option, you have to select some of the elements in order to create and connect your circuit diagram.

The second, faster option is what you learned in the example. In this case you create the entire circuit connection from left to right.

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3-10 Commission the Pico

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Chapter

4

Draw a Circuit Diagram with Pico

By working through the example, Create a Circuit Diagram (Program) on page 3-4, you should have gained an initial impression on how to create a program in Pico. This chapter describes the full range of Pico functions and provides further examples of how to use Pico.

Pico Operation

Buttons for Drawing Circuit Diagrams

Press To

Delete branch, contact, relay, or empty rung in the circuit

Alt

diagram.

• Toggle between break and make contact.

• Connect contacts and relays.

• Add circuit connections (rungs).

Del

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4-2 Draw a Circuit Diagram with Pico

Up/Down Arrows

• Change value.

• Move cursor up and down.

Left/Right Arrows

• Change between parameters.

• Move cursor left and right.

Cursor Button Set to P-Button Function (if enabled)

• Left Arrow = Input P1

• Right Arrow = Input P3

• Up Arrow = Input P2

• Down Arrow = Input P4

• Undo settings from previous Ok

• Exit current display

Esc

Ok

• Change or add a contact/relay.

• Save the setting.

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Draw a Circuit Diagram with Pico 4-3

Button Operation

The cursor buttons in the Pico circuit diagram perform three functions. The current mode is indicated by the appearance of the flashing cursor:

• Move

• Enter

• Connect

In Move mode, you can use the arrow keys to move the cursor around the circuit diagram in order to select a branch, contact or relay coil.

I 1

Use Ok to switch to Enter mode so that you can enter or change a value at the current cursor position. If you press Esc in Enter mode, Pico will undo the most recent changes.

Press Alt to switch to Connect mode for wiring contacts and relays. Press Alt again to return to Move.

Press Esc to leave the circuit diagram and parameter display. Pico performs many of these cursor movements automatically. For example, Pico switches the cursor to Move mode if no further entries or connections are possible at the selected cursor position.

Opening the Parameter Display

If you specify the contact of a relay type in Enter mode, Pico automatically switches from the contact number to the parameter display when you press Ok.

Press the right arrow entering any parameters.

to switch to the next contact or coil field without

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4-4 Draw a Circuit Diagram with Pico

Contacts

Contacts are used to modify the flow of current in the circuit diagram. Contacts in the circuit diagram are either make or break contacts. Make contacts are open when off (de-energized) and closed when on. Break contacts are closed when off and open when on.

Usable Contacts

Contact Pico Representation

Make contact; Open when off

Break contact; Closed when off

Pico works with different contacts, which can be used in any order in the contact fields of the circuit diagram.

I, Q, M, N, A, Ö, Y, C, T, O, P, :, D, S, R, Z

I, Q, M, N, A, Ö,Y, C, T, O, P, D, S, R, Z

Contact Type Make

Contact

Controller Inputs I I

Break Contact

1760-L12xxx 1760-L18xxx

1760-L20xxx

I1 to I8 I1 to I12

0 signal I13 I13

Expansion Status –

I14

(3)

Short-circuit/overload I16 I15 to I16

Soft Inputs - Keypad P P

Controller Outputs Q Q

Internal Marker Bits M M

Internal Marker Bits N N

Counters C C

Timers T T

Real Time Clock

Analog Setpoint Compare

(1)

AAA1 to A16 A1 to A16

(2)

Text Display D D

Expansion Outputs or

SS

P1 to P4 P1 to P4

Q1 to Q4 Q1 to Q8

M1 to M16 M1 to M16

N1 to N16 N1 to N16

C1 to C16 C1 to C16

T1 to T16 T1 to T16

1 to 8 1 to 8

D1 to D16 D1 to D16

S1 to S8 S1 to S8

Internal Marker Bits

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Jump to Label : – :1 to :8 :1 to :8

Expansion Inputs R R

Expansion Overload

RR

–R1 to R12

–

R15 and R16

Detection

(3)

Draw a Circuit Diagram with Pico 4-5

Contact Type Make

Contact

Break Contact

1760-L12xxx 1760-L18xxx

1760-L20xxx

Operating Hours Counter O O O1 to O4 O1 to O4

Year Time Switch Y Y

Master Reset Z Z

(1) Not available on “-NC” models.

(2) This applies only to the 1760-LxxBWB-xx and 1760-L12DWD.

(3) This applies only to 1760-L18xxx-EX models. R15 and R16 are used for expansion overload detection for the

transistor expansion module, 1760-IB12XOB8, as described on page 9-4.

Y1 to Y8 Y1 to Y8

Z1 to Z3 Z1 to Z3

Relays

Pico has nine different types of relay for use in a circuit diagram.

Relay type Pico Symbol 1760-L12xxx 1760-L18xxx

1760-L20xxx

Controller Outputs Q Q1 to Q8 Q1 to Q8 X –

Internal Marker Bits M M1 to M16 M1 to M16 X –

Coil Function

Parameter

Internal Marker Bits N N1 to N16 N1 to N16 X –

Counters C C1 to C16 C1 to C16 X X

Timers T T1 to T16 T1 to T16 X X

Real Time Clock

(1)

1 to 8 1 to 8

–X

Operating Hours Counters O O1 to O4 O1 to O4 X X

Analog Setpoint Compare

(2)

A A1 to A16 A1 to A16 – X

Text Display D D1 to D16 D1 to D16 X X

Jump to Label : :1 to :8 :1 to :8 X –

Expansion Outputs or Internal Marker

S S1 to S8 (as marker) S1 to S8 X –

Bits

Year Time Switch Y Y1 to Y8 Y1 to Y8 – X

Master Reset Z Z1 to Z3 Z1 to Z3 X –

(1) Not available on “-NC” models.

(2) This applies only to the 1760-LxxBWB-xx and 1760-L12DWD.

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4-6 Draw a Circuit Diagram with Pico

The switching behavior of these relays is set using coil functions and parameters. The coil functions and parameters are listed with the description of each function relay type.

The options for setting output and marker relays are listed with the description of each coil function.

Circuit Diagram Display

In the circuit diagram, contacts and coils are connected from left to right - from contact to coil. The circuit diagram is created on a hidden grid containing contact fields, coil fields and circuit connections. It is then wired with connections.

Insert relay contacts in the three contact fields. The first contact field is automatically connected to the voltage.

Insert the relay coil to be controlled together with its function and designation in the coil field.

Every line in the circuit diagram forms a circuit connection or ladder logic rung. Pico enables 128 circuit connections/rungs.

Coil FieldContact Fields

I1 -I2 -T1 -{Q1

Circuit

Q1 -

connections/rungs

1

Connections

Connections are used to produce the electrical continuity between relay contacts and the coil. Connections can be created across several rungs. Each point of intersection is a connection. The circuit diagram display performs two functions:

Publication 1760-UM001D-EN-P - September 2005

• In Stop mode, it is used to edit the circuit diagram.

• In Run mode, it is used to check the circuit diagram using the

Power flow display.

Draw a Circuit Diagram with Pico 4-7

Save and Load Circuit Diagrams

There are two ways of saving circuit diagrams in Pico:

• Save to a memory module.

• Save to a PC running PicoSoft programming software.

Once they are saved, programs can be reloaded into Pico, edited, and run. All circuit diagram data is saved in Pico. In the event of a power failure, the data is retained until the next time it is overwritten or deleted.

Memory Module

Each memory module (1760-MM2B) can contain one circuit diagram, which is inserted into the Pico interface.

The 1760-MM1 and 1760-MM2 memory modules can be read on the Series B Pico controllers. The Series B Pico controllers can only write to the 1760-MM2B memory modules.

PicoSoft and PicoSoft Pro

PicoSoft are optional PC programs that allow you to create, store, test and manage Pico programs. Completed programs are transferred between your PC and Pico via the connecting cable. Once you have transferred a circuit diagram, you can monitor the program running in Pico directly from your PC.

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4-8 Draw a Circuit Diagram with Pico

Work with Contacts and Relays

In Pico circuit diagrams, the switches, buttons, and relays of conventional relay logic are connected using input contacts and relay coils.

Connect S1 to Pico input terminal I2 Connect S2 to Pico input terminal I3

S1

CR1

S2

M1

CR1

Connect load M1 to Pico output Q4 S1 or S2 switches on M1.

I2----------{Q4

I3

Pico Circuit Diagram

First, specify which input and output terminals you wish to use in your circuit.

Depending on the model, Pico controllers have 8, 12 or 24 input terminals and 4, 6, 8, 10 or 16 outputs. The signal states at the input terminals are recorded in the circuit diagram using input contacts I1 to I12. In the circuit diagram, the outputs are switched using output relays Q1 to Q6. The expansion modules can add another 12 inputs and 6 or 8 outputs. The signal states at the input terminals are recorded in the circuit diagram as R1 to R12. The outputs are switched using S1 to S8.

I 2

Contact Name

{ Q 4

Relay Name

Coil Function

Contact Number

Relay Number

Enter or Modify the Contact or Relay

Define a contact in Pico via its name and number.

A relay is defined by its coil function, name and number.

A full list of all the contacts and relays is given on page 4-4. Enter mode is used to modify the value of contact fields and coil fields. The value to be modified will flash. If the field or section is empty, Pico will enter contact ’I1’ or the coil ’{Q1’.

• Move the cursor using the buttons to a contact or coil field.

• Press Ok to switch to Enter mode.

• Use the left and right arrow keys to select the position you wish

to change, or press Ok to jump to the next position.

• Use the up and down arrow keys to modify the value of the position

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Draw a Circuit Diagram with Pico 4-9

.

Change I1 to I2 in the contact field

Change {Q1 to {Q8 in the coil field

or OK

{Q1

S R

{Q1

M T C D S :

OK

{Q1

{Q8

2

3 .

.

.

8

or OK

I1 Q M

C T P D S : R

I1

2 3

or or

OK

4 5 . . .

16

I2

Pico leaves the Enter mode when you press the left or right arrow keys or Ok.

Deleting Contacts and Relay Coils

1. Move the cursor using the arrow buttons to a contact or coil

field.

2. Press Del.

The contact or the relay coil is deleted, together with any connections.

Change Make Contacts into Break Contacts

Every relay contact in the circuit diagram can be defined as either a make or break contact.

1. Move the cursor over the contact and press Enter to change to

the enter mode.

2. Press Alt. The make contact changes to a break contact.

3. Press Ok twice to confirm the change.

I2----------{Q4

I3

ALT

I2----------{Q4

I3

2 X

I2----------{Q4

I3

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4-10 Draw a Circuit Diagram with Pico

Create and Modify Connections

Relay contacts and relay coils are connected in Connect mode using the diagonal wiring arrow (available in this mode). Use the arrow buttons to move the cursor onto the contact field or coil field from which you wish to create a connection. Do not position the cursor on the first contact field. At this position, the Alt button has a different function (Insert circuit connection).

1. Press Alt to switch to Connect mode.

2. Use the left and right arrows to move the diagonal arrow

between the contact fields and coil fields and the up and down arrows to move between circuit connections.

3. Press Alt to leave Connect mode.

Pico leaves Connect mode automatically when you move the diagonal arrow onto a contact field or coil field which is already assigned. In a circuit connection, Pico automatically connects relay contacts and the terminal to the relay coil if there are no empty fields in-between.

IMPORTANT

Never work backward. Your circuit diagram may not perform as you expect it to.

When wiring more than three contacts in series, use one of 16 available marker relays ’M’ or ’N’.

Do NOT do this: Do this instead:

I1-Q4-I3

I2-I4-{Q2

I1-Q4-I3-{M1 I2-I4-M1-{Q2

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Draw a Circuit Diagram with Pico 4-11

Delete Connections

1. Move the cursor onto the contact field or coil field to the right of

the connection that you want to delete. Press Alt to switch to Connect mode.

2. Press Del.

Pico will delete a connection. Closed connections that are adjacent are retained.

If several circuit connections are connected to one another, Pico first deletes the vertical connection. If you press Del again, it deletes the horizontal connection as well. You cannot delete connections that Pico has created automatically.

3. Close the delete operation by pressing Alt or by moving the

cursor to a contact or coil field.

I2---------{Q4

I3

I2---------{Q4

I3

Insert and Delete a Circuit Connection

The LCD display shows four of the 128 circuit connections in the display at the same time. Pico automatically scrolls the display up or down to show hidden circuit connections—even empty ones—if you move the cursor past the top or bottom of the display.

A new circuit connection is added below the last connection or inserted above the cursor position:

1. Position the cursor on the first contact field of a circuit

connection.

2. Press Alt.

The existing circuit connection, with all its additional connections, is shifted down. The cursor is then positioned directly in the new circuit connection.

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4-12 Draw a Circuit Diagram with Pico

Delete a Circuit Connection

Pico only removes empty circuit connections, i.e. those without contacts or coils.

1. Delete all the contacts and relay coils from the circuit

connection.

2. Position the cursor on the first contact field of the empty circuit

connection.

3. Press Del.

The subsequent circuit connection(s) is ’pulled up’ and any existing links between circuit connections are retained.

Use the Cursor Buttons as Inputs

P2

P1

P4

I1---------SQ1

P2

I2---------RQ1

P4

I5---------{M1

I1-M1------{Q1

P1-M1

With Pico, you can also use the four cursor buttons as soft inputs in the circuit diagram.

The buttons are contacts P1 to P4 in the circuit diagram. The P-Buttons can be activated and deactivated in the System menu.

P3

The P-Buttons can also be used for testing circuits or manual operation. These button functions are also useful for servicing and commissioning purposes.

Example 1

A lamp at output relay Q1 is turned on and off via inputs I1 and I2 or using cursor buttons up and down.

Example 2

Input ’I1’ is used to control output ’Q1’. Input I5 switches to Cursor button mode and deactivates circuit connection I1 via M

IMPORTANT

The P-Buttons are only recognized as switch contacts in the Status menu display, and not in the circuit diagram display.

1.

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..............

I

MO 02:00

..........STOP

P2

Draw a Circuit Diagram with Pico 4-13

The Status menu display shows whether the P-Buttons are used in the circuit diagram.

Display Function

P Button function active

P2 Button function active and P2 button pressed

P- Button function not active

Empty box: P buttons not used.

Check the Circuit Diagram

I2---------{Q4

I3---

I2---------{Q4

I3---

Pico allows you to monitor the switching states of contacts and relay coils during operation.

1. Complete the small parallel connection and switch Pico to Run

mode via the main menu.

2. Return to the circuit diagram display.

You are now unable to edit the circuit diagram.

IMPORTANT

If you switch to the circuit diagram display and are unable to modify a circuit diagram, first check whether the unit is in Stop mode.

The circuit diagram display performs two functions depending on the mode:

• STOP: Create circuit diagrams

• RUN: Show power flow display

Switch on I3.

In the power flow display, current-carrying connections are thicker than those that are not powered.

You can follow a current-carrying connection across all circuit connections by scrolling the display up and down. The power flow display will not show signal fluctuations in the millisecond range. This is due to the inherent delay factor of LCD displays.

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4-14 Draw a Circuit Diagram with Pico

Coil Functions

You can set the coil function to determine the switching behavior of relay coils. The following coil functions are available for relays Q, M, S, D and ’:’.

Circuit Diagram Symbol

Symbol

{

}

S

R

Coil Function ExamplePico

Output Energize Function

Output Negated Function

Cycle pulse falling edge

Cycle pulse raising edge

Maintained/ Flip-Flop Function

Set (latching)

Reset (unlatching)

{Q1,{D2, {S4,{:1, {M5 }Q1,}D2, }S4

Q3,

M4,

D8, S7

Q3,

M4,

D8, S7

Q3,

M4,

D8, S7

SQ6,SM2, SD3,SS4

RQ4,RM5, RD7,RS3

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The marker relays M and N are used as a flag. The S relay can be used as the output of an expansion module or, as a marker if no expansion module is connected. When used as markers, the only difference between them and the output relay Q is that they have no output terminals. The functions of timer and counter relays are explained in the relevant relay description. The coil function { (output energize) should only be used once on each coil. Otherwise, the last coil in the circuit diagram determines the status of the relay.

To ensure proper operation of all relay states, only assign the same coil function once to a relay (S, R).

Exception: The coil function can be used properly several times when using jumps to structure the circuit diagram.

Draw a Circuit Diagram with Pico 4-15

Rules for Wiring Relay Coils

Use the output energize or ’flip-flop’ function once only for each relay coil.

Use the ’latch’ and ’unlatch’ functions to control each relay coil - the first to set it (S) and the second to reset it (R).

Relays with Output Energize Function

The output signal follows immediately after the input signal, and the relay acts as a contactor.

Signal Diagram:

Input

Output

on

on

Instruction Type Representation in Pico

Output Relay Q {Q1…{Q6 (depending on type)

Marker Relay M {M1…{M16, {N1…{N16

Text Display Relay D {D1…{D16

Expansion or Marker Relay {S1…{S8 (1760-L18xxx)

Jumps {:1…{:8 (1760-L18xxx)

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4-16 Draw a Circuit Diagram with Pico

Relays with Output Energize Negate Function

The output signal is the opposite of the input signal; the relay operates like a contactor with contacts that have been negated. If the coil is energized

Signal Diagram:

when ON, the coil switches its make contacts to the OFF state.

Input

Output

on

on

Instruction Type Representation in Pico

Output Relay Q }Q1…}Q6 (depending on type)

Marker Relay M }M1…}M16, }N1…}N16

Text Display Relay D }D1…}D16 (1760-L18xxx)

Expansion or Marker Relay }S1…}S8 (1760-L18xxx)

Jumps }:1…}:8 (1760-L18xxx)

Relays with Falling Edge Function

This function is used if the coil is only meant to switch on a falling edge. With a change in the coil state from closed to open, the coil switches the

Signal Diagram:

make contacts to the closed state for one cycle.

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Input

Output

on

on

Instruction Type Representation in Pico

Marker Relay M, N

Jumps

èM1…èM16, èN1…èN16 è:1…è:8 (1760-L18xxx)

Physical outputs should not be used when a cycle pulse is generated.

Relays with Raising Edge Function

This function is used if the coil is only meant to switch on a rising edge. WIth a change in the coil state from open to closed, the coil switches its make

Signal Diagram:

contacts to the closed state for one cycle.

Draw a Circuit Diagram with Pico 4-17

Input

Output

on

on

Instruction Type Representation in Pico

Marker Relay M, N

Jumps

ÈM1…ÈM16, ÈN1…ÈN16 È:1…È:8 (1760-L18xxx)

Physical outputs should not be used when a cycle pulse is generated.

Maintained/Flip-Flop Relay

The relay coil switches state whenever the input signal changes from 0 to 1. The relay behaves like a flip-flop.

Signal Diagram:

Input

Output

on

on

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4-18 Draw a Circuit Diagram with Pico

Instruction Type Representation in Pico

Output Relay Q

Q1… Q8 (depending on type)

Marker Relay M

Text Display Relay D

Expansion or Marker Relay

M1… M16

D1… D8 (1760-L18xxx)

S1… S8 (1760-L18xxx)

A coil automatically turns off if the power fails or if Pico is in Stop mode.

Exception: Retentive coils retain signal 1 (see Chapter 7).

Latching Relay

The ’latch’ and ’unlatch’ relay functions are used in pairs. The relay picks up when latched and remains in this state until it is reset by the ’unlatch’ function.

Signal Diagram:

Set

S

On

Reset

R

Output

A - The Set coil and the Reset coil are triggered at different times. B - Reset coil is triggered at the same time as the Set coil. C - Power supply switched off.

On

On

AB C

Instruction Type Representation in Pico

Output Relay Q SQ1…SQ8, RQ1…RQ8 (depending on type)

Marker Relay M SM1…SM16, RM1…RM16

Text Display Relays D SD1…SD8, RD1…RD8 (1760-L18xxx)

Expansion or Marker Relay SS1…SS8, RS1…RS8 (1760-L18xxx)

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Draw a Circuit Diagram with Pico 4-19

I1-I2-------SQ1

...

...

I2----------RQ1

Function Relay Types

Use relay functions ’S’ and ’R’ only once per relay. If both coils are triggered at the same time, priority is given to the coil further down in the circuit diagram. This is shown in the preceding signal diagram in section ’B’.

IMPORTANT

A latched relay is automatically switched off if the power fails or if the device is in Stop mode. Exception: Retentive coils retain signal 1 (see What is Retention? on page 7-1).

The function relays are used to simulate some of the devices used in conventional relay control systems. Pico provides the following function relay types:

Circuit Diagram Symbol Function Relay Type

Timing relay, on-delayed Timing relay, on-delayed with random switching

Timing relay, off-delayed Timing relay, off-delayed with random switching

Timing relay, single pulse Timing relay, flashing

DC

R

Counter relay, up/down counter

Time switch, weekday/time (only in Pico models with real time clock)

Analog comparator relay (only in Pico 24V dc models)

Text d i spl a y

A function relay is started via its relay coil or by evaluating a parameter. It switches the contact of the function relay according to its function and the set parameters. Current actual values are erased if the power is turned off or if the unit is switched to Stop mode.

Exception: Retentive coils retain their signal (see Chapter 7).

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4-20 Draw a Circuit Diagram with Pico

In timing and counter relays, it is also possible to change the switching behavior via the coil function.

ATTENTION

In Run mode, Pico processes the function relays after a pass through the circuit diagram. The last state of the coils is used for this.

Only use the coil of a function relay once.

Exception: The same coil can be used several times when working with jumps.

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Draw a Circuit Diagram with Pico 4-21

Example with Timing and Counter Relays

A warning light flashes when the counter reaches 10.

Hard-Wire with Relays

S1

S2

CNTR1

T1

+24V

CNTR1 Count

Reset

T1

2.00 sec

PL1

R

0V

F1

I5---------CC1

I6---------RC1

C1---------TT1

T1---------{Q1

S2

S1

+24 V

com

12

Q 1

0V

M1

I5 I6

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4-22 Draw a Circuit Diagram with Pico

Use Circuit Diagram Forms

You can use the circuit diagram form on page B-1 of this manual for planning and preparing your Pico circuit diagrams. An example form is shown below and on the next page.

Customer: Program:

Date: Page:

J. Smith Ltd.

5-1-00

Comment:

Counter (Value 10)

Reset Counter

Trigger flash/blink relay

Warning light, flash 2s

Warning Light

1

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Draw a Circuit Diagram with Pico 4-23

Customer: Program:

Date: Page:

J. Smith Ltd.

5-1-00

Timing relays

:

TRG T

RES

:

::

TRG T

RES

Analog comparators

ANALOG

A

ANALOG ANALOG

Timing switches

-

-

Warning Light

2

::

TRG T

RES

AA

-

ON

OFF

:

:

Up/down counters

DIR

CNT

RES

DIR

CNT

RES

:

:

ON

OFF

C

ON

OFF

C

DIR

CNT

RES

:

:

C

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4-24 Draw a Circuit Diagram with Pico

I5----------CC1

C1 N +

S

+0

C1 N + S

00000

C1 N +

S

00010

1. Enter the circuit diagram up to CC1.

CC1 is the contact of counter relay 1. If the cursor is on the contact number, Pico will call up the parameter display when you press Ok.

2. Move the cursor onto the 1 in CC1 and press Ok.

The parameter set for the counter is displayed.

3. Move the cursor onto the plus sign to the right of the S

(setpoint) and press Ok.

4. Change the counter setpoint to 10:

Use the left and right buttons to move the cursor onto the tens digit.

Use the up and down buttons to modify the value of the digit.

5. Press Ok to save the value and Esc to return to the circuit

diagram. Pico has specific parameter displays for function relays. The meaning of these parameters is explained under each relay type.

I5----------CC1

I6----------RC1

C1----------TT1

T1 Ü S +

I1

+0

I2

+0

T:

T1 Ü S +

I1

01.000

I2

00.500

T:

6. Enter the circuit diagram up to contact ’TT1’ of the timing relay.

Set the parameters for T1.

The timing relay works like a flasher/blink relay. The Pico symbol for the flasher/blink relay is shown in the screen to the left. It is set at the top left of the parameter display.

7. Press the down arrow and select the flasher/blink relay symbol.

8. Use the right arrow to move to the first time setpoint I1.

9. Press Ok, then press the right arrow.

10. Use the arrows to enter the value 01.000 and press Ok.

The time setpoint I1 for the pause time is 1 second.

11. Use the down arrow to enter the value of the second setpoint I2.

Set this value to 0.5 seconds. This is the time value for the pulse time.

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12. Press Esc to leave the parameter entry.

The values are now stored.

Draw a Circuit Diagram with Pico 4-25

I5----------CC1

I6----------RC1

C1----------TT1

T1----------{Q1

C1 N +

S

0010

C: 0000

C1 N + S

0010

C: 0007

C1 N + S

0010

13. Complete the circuit diagram.

14. Press Ok to store the circuit diagram.

Test Circuit Using Power Flow Display

1. Switch Pico to Run mode and return to the circuit diagram.

Each parameter set can be displayed using the power flow display for the circuit diagram.

2. Move the cursor onto C1 and press Ok.

The parameter set for the counter is displayed with actual and setpoint values.

3. Switch I5. The actual value changes.

This is represented in the Pico parameter display. In the last line C: 0007 the counter actual value is equal to seven.

If the actual value is greater than or equal to the setpoint (10), the left character on the bottom row changes to a black box. The contact of counter C1 switches.

C: 0010

T1 Ü S +

S1

00.500

S2

00.250

00.200

T:

The counter contact triggers the timing relay. This causes the warning light to flash at output Q1.

Double the flashing frequency:

1. Select T1 in the power flow display and press Ok.

2. Change the set time I1 to 00.500 and I2 to 00.250

(0.5 and 0.25 s).

3. Press Ok to save the set time.

The character on the left of the bottom row indicates whether the contact has switched or not.

Protect Timer and Counter Settings

You can also modify parameter settings via the PARAMETER menu option. If you want to prevent other people from modifying the parameters, change the access enable symbol from ’+’ to ’-’ when creating the circuit diagram and protect the circuit diagram with a password.

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4-26 Draw a Circuit Diagram with Pico

Timing Relays

I5-I4-------TT1

T1----------{Q3

Pico provides sixteen different timing relays, T1 to T16.

A timing relay is used to change the switching duration and the make and break times of a relay contact. The possible delay times range between 2 ms and 100 hours. You can use positive values, values of analog inputs, and actual values of counter relays and timing relays.

IMPORTANT

The timing relays of Pico Series B controllers function in the same way as the timing relays of Pico Series A controllers.

The one exception is the ’flash’ function. Pico Series B starts with the pulse. In Series A controllers the ’flash’ function starts with the pause. If required, the same timing relays can also be used for retentive data.

You integrate a timing relay into your circuit in the form of a contact and coil.

Contact Coil

T1 to T16 Contact of a timing relay

TT1 to TT16 Enable, timing relay trigger

RT1 to RT16 Reset coil of the timing relay

HT1 to HT16 Stop coil of the timing relay (H=Stop, S means the Set

coil function

IMPORTANT

To prevent unpredictable switching states, use each coil of a relay only once in the circuit diagram.

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T1 X S +

I1

00.000

I2

00.000

T:

Draw a Circuit Diagram with Pico 4-27

Parameter Display and Parameter Set for a Timing Relay

T1 Timing relay number 1

X On-delayed mode

S Time range in seconds

+ • + appears in the Parameter menu

• - does not appear in the Parameter menu

I1 Time setpoint 1:

• Positive value, I7, I8, I11, I12

• Actual value T1 to T16, C1 to C16

I2 Time setpoint 2:

• Positive value, I7, I8, I11, I12

• Actual value T1 to T16, C1 to C16

T: Display of actual value in Run mode

In the parameter display of a timing relay you can change the mode, the time base, the time setpoint 1, time setpoint 2 (if necessary) and the enable of the parameter display.

Compatibility Between Pico Series A and Pico Series B Controllers

New functions have been added to the parameter display of the Pico Series B Controllers. The Series A parameters can be found at the following points:

Pico Series A

Pico Series A Pico Series B

X

X

S

AA.BB

S

AA.BB

TRG

TRG

{

{

RES

RES

Actual value of elapsed time Contact has not switched Contact has switched

T1 = T1 X=X S=S

T1

AA.BB = AA.BB

T1

+=+

T1 X S +

I1

10.000

I2

00.000

T:

03.305

T1 X S +

T1 X S + I1

AA.BB

I1

AA.BB

I2

I2

T:

T:

Mode, time base Time setpoint 1 Time setpoint 2

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4-28 Draw a Circuit Diagram with Pico

Tas k: Turn on output Q1 1.5 min. after actuation via I1. Disable T2 via I2.

Programming a Timing Relay

A timing relay is integrated into your circuit in the form of a contact. The function of the relay is defined via the parameter display. The relay is started via the trigger input TRG and can be reset via the reset input RES. A timer also resets when it is turned off. To prevent unpredictable switching states, use each coil of a relay only once in the circuit diagram.

Circuit Diagram:

I1---------TT2

I2---------RT2

2

T

--------{Q1

Parameter Display:

T2 X M:S +

I1

01.500

I2

00.000

T:

00.000

At least two elements are needed in the circuit diagram for a timing relay:

• A relay contact in the contact field, in this case T2.

• A trigger coil in the coil field, in this case TT2.

You can also wire up the reset coil RT2 if you wish to use an external reset signal. Enter the number of the relay contact T2 and press Ok.

The parameter set for timing relay T2 is displayed. Specify the function of the relay.

Parameters for Timers

The parameter display for a timing relay is used to modify the switching function, setpoint time and timebase units and to enable or disable parameter access.

Switch Function

Timebase Units

T1 S +

I1

00.000

I2

30.000

T:

00.000

Parameter Display

Current Value

Setpoint

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The coil terminals are not shown if you access the parameters via the PARAMETER menu option. The actual time is only displayed in Run mode. To view the actual time, call up the parameter display via the power flow display or using the PARAMETER option.

Draw a Circuit Diagram with Pico 4-29

Switch Function

Description

Parameters

X ?X

Switch with on-delay Switch with on-delay and random time range Switch with off-delay

X

Switch with off-delay and random time range Switch with single-pulse Switch with flashing

Typically, delay times are >40 ms for the 1760-L12xxx and >80 ms for the 1760-L18xxx. This is because a time value less than the maximum scan time of the Pico controllers may cause uncontrolled switching states.

Time Units and Setpoint Time Parameters Resolution

S 00.00 Seconds 10 x milliseconds, 00.00 to 99.99 10 ms

M:S 00:00 Minutes: seconds, 00:00 to 99:59 1 s

H:M 00:00 Hours: minutes, 00:00 to 99:59 1 min.

X?X

Parameter Set Displayed via the PARAMETER Menu Option

+ Access enabled - Access disabled

Timing Relays, On-Delay, Without and With Random Switching

The relay switches a contact after the setpoint delay has elapsed. With random switching, the relay contact switches randomly at any time up to the specified time value (shown shaded in figure).

Timing Diagram

Trigger

Reset

Output

On

On

On

ttt

ABC

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4-30 Draw a Circuit Diagram with Pico

The trigger input starts the time (t). If the trigger input is disabled after the time has elapsed, timer is reset and the output is turned off (A). If the trigger coil drops out before the time has elapsed, the contact is not turned on (B). The reset coil has priority over the trigger coil and always resets the timer and turns the output off (C). If the preset is set to zero, the output follows immediately after the trigger signal.

Typical applications include:

• Switching conveyor belts on or off after a delay

• Detecting gaps in the switching of sensors in the event of a fault

• Automatic window shutter control with random switching times

Timing Relays, Off-Delayed With and Without Random Switching

The relay switches a contact immediately and then resets it after the setpoint delay has elapsed. With random switching, the relay contact switches randomly at any time up to the specified time value (shown

?

shaded in figure).

Timing Diagram

Tri gg er

Reset

Output

On

On

On

tt

ABC

The trigger coil switches the contact. If the trigger coil (A) drops out, the setpoint time starts and resets the contact after the time has elapsed. The reset coil has priority over the trigger coil and always resets the relay contact (B, C). If the time is set to zero, the contact follows immediately after the trigger signal.

Typical applications include:

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• Activating the deceleration of motors or fans

• Automatic lighting control for vacant buildings with random

switching times

Draw a Circuit Diagram with Pico 4-31

Timing Relays, Single Pulse

The relay switches a contact for a time equal to the delay time set, regardless of the length of the trigger signal.

Signal Diagram:

Trigger

Reset

Output

On

On

On

tt

The reset coil has priority over the trigger coil and resets the relay contact before the time has elapsed. If the time is set to zero, the contact is set for the duration of one program scan.

The cycle time varies according to the length of the circuit diagram.

Typical applications include:

• Adjusting switching signals to a defined pulse length

• Shortening pulses to the duration of a cycle (one-shot)

= flash

Timing Relays, Flashing

The relay closes and opens the relay contact alternately with the flashing frequency.

Flash Frequency

EXAMPLE

Set Time: 0.2s, Flash Frequency

----------------------- ---------= 2Set Time×

1

1

----------2.5 Hz==

0.4s

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4-32 Draw a Circuit Diagram with Pico

Signal Diagram:

Tri gg er

Reset

Output

On

OnOn

On

ttt

The trigger coil enables the flashing on and off. The flashing period starts with switch position ‘off’. The reset coil has priority over the trigger coil and always resets the relay contact.

If the time is set to zero, the flash frequency changes with the cycle time. The cycle time varies according to the length of the circuit diagram.

A typical application is activating warning lamps.

Counter Relays

DC

Pico works with counter relays C1 to C16.

The counter relay adds or subtracts pulses and switches if the actual value is greater than or equal to the setpoint value. Values between

R

0000 and 9999 are possible.

A counter relay can be controlled via the counting pulse CCx, counting direction DCx and reset RCx relay functions.

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Signal Diagram:

Draw a Circuit Diagram with Pico 4-33

Count

Direction

Reset

Output

CCx

DCx

RCx

On

On

BACD

OnOn

8

7

6

5

4

3

2

1

0

On

The relay contact of a counter with setpoint value 6 switches when the actual value is 6 (A). If the counting direction is reversed (B), the contact switches off when the actual value is 5. Without a counting pulse, the actual value is retained (C). The reset coil resets the counter to 0 (D).

Possible applications include the counting of components, lengths or event frequency.

Program a Counter Relay

You can integrate a counter relay into your program in the form of a contact and coil. Counter relay C1 receives counting pulses via the count coil CC1. The counting direction can be changed via the direction coil DC1:

• If DC1 = 0, relay C1 counts up.

• If DC1 = 1, relay C1 counts down.

The Reset coil RC1 is used to reset the counter to 0.

Contact C1 is used to process the result of the counter in the circuit diagram. To prevent unpredictable operation, use each coil of a relay only once in the circuit diagram.

Enter at least one contact and a coil in your circuit diagram:

• A relay contact in the contact field, in this case C1

• A count coil in the coil field, in this case CC1

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4-34 Draw a Circuit Diagram with Pico

z

I1---------CC1 I3---------DC1 I2---------RC1

--------{Q1

C

1

You can wire up coils RC1 and DC1 as required. Select relay contact C1, move the cursor to 1 and press Ok.

The parameter set for counter relay C1 is displayed.

Determine Counter Frequency

0005 DIR

CNT

{

RES

{

The maximum counter frequency depends on the length of the circuit diagram in Pico. The number of contacts, coils and circuit connections used determines the scan time (cycle time) required to process the

C1

Pico circuit diagram.

+

EXAMPLE

When using a Pico with only three circuit connections for counting, resetting and outputting the result via the output, the counter frequency may be 100 Hz.

To determine the scan time refer to Determine Cycle Time of Circuit Diagrams on page 8-3.

The maximum counter frequency depends on the maximum scan time.

Use the following formula to determine the maximum counter frequency:

1

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

f

c

2t

×

0.8×=

c

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f

= maximum counter frequency

c

t

= maximum scan time

c

0.8 = correction factor

EXAMPLE

The maximum scan time is t

1

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

f

c

24 ms×

=×=

0.8 100 H

= 4000 µs (4 ms).

c

C2 N + S

00.000

Draw a Circuit Diagram with Pico 4-35

Parameters for Counters

The parameter display for counters is used to change the counter setpoint value and to enable or disable parameter access.

C2 Counter function relay number 2

N • Mode N: up/down counter

• Mode H: high-speed up/down counter

• Mode F: frequency counter

+ • + appears in the Parameter menu

• - does not appear in the Parameter

menu.

S Setpoint, constant from 00000 to 32000

Parameter Coil Function Meaning

DIR DC1 to DC16 Counting direction

Coil not triggered: count up Coil triggered: count down

CNT CC1 to CC16 Counting pulse

RES RC1 to RC16 Reset, coil triggered: actual value reset to

00000

The symbol ‘

{‘ before DIR, CNT and RES indicates whether the coil

function is programmed in the circuit diagram.

Parameters Displayed via the PARAMETER Menu Option

+ Access enabled - Access disabled

The actual value is only displayed in Run mode. The parameter display can then be called via the power flow display or via the PARAMETER option from the main menu.

The coil symbol is not displayed if you select the parameter display via the PARAMETER menu option.

The counter relay counts between 0 and 32000.

When the Pico is in Run mode and the value of 32000 is reached, this value is retained until the count direction is changed. If the value of

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4-36 Draw a Circuit Diagram with Pico

00000 is reached, this value is retained until the count direction is changed.

Compatibility between Pico Series A Controllers and Pico Series B Controllers

High Speed Counters

0230

DIR

{

CNT

{

RES

{

0000

C1

+

AAAA = S AAAAA C1 = C1 +=+

C1 N +

S

AAAAA

Pico provides various high-speed counter functions. These counter function blocks are coupled directly to digital inputs. The following functions are possible:

• Frequency counters: C15 and C16

• High-speed counters: C13 and C14

Frequency Counters

Pico provides two frequency counters, C15 and C16, for use as required. The frequency counters can be used for measuring frequencies. The high-speed frequency counters are permanently connected to the digital inputs I3 and I4.

Publication 1760-UM001D-EN-P - September 2005

Frequency counters C15 and C16 can be used for determining motor speeds, volume measurement using volume meters or the running of a motor.

The frequency counter allows you to enter an upper threshold value as a comparison value. The C15 and C16 frequency counters are not dependent on the cycle time.

Counter Frequency and Pulse Shape

The maximum counter frequency is 1 kHz and the minimum counter frequency is 4 Hz. The signals must be square waves with a mark-to-space ratio of 1:1. If this is not the case, then the minimum mark-to-space ratio is 0.5 ms.

t

t

min

0.5

1

---------

×=

f

max

= minimum time of the pulse or pause duration

min

= maximum count frequency (1 kHz)

f

max

Draw a Circuit Diagram with Pico 4-37

IMPORTANT

Frequency counters operate independently of the program cycle time. The result of the actual value setpoint comparison is only transferred once every program cycle for processing in the circuit diagram.

The reaction time in relation to the setpoint/actual value comparison can therefore be up to one cycle.

Measurement Method

The pulses on the input are counted for one second regardless of the cycle time, and the frequency is determined. The measurement result is provided as an actual value.

Wire a Frequency Counter

The following assignment of the digital inputs apply.

• I3 counter input for frequency counter C15.

• I4 counter input for frequency counter C16.

-----------CC15

CC15--------SQ3

I8-----------

RC15

IMPORTANT

If you use C15 or C16 as frequency counters, coils DC15 or DC16 will have no function. The counter signals are transferred directly from the digital inputs I3 and I4 to the counters. A frequency counter measures the actual value and does not measure a direction.

You only integrate a frequency counter into your circuit in the form of a contact and enable coil. The coils and contacts have the following meanings:

Contact Coil Description

C15 to C16 The contact switches if the actual

value is greater than or equal to the setpoint.

CC15, CC16 Enable of the frequency counter on ’1’

state, coil activated.

RC15, RC16 Reset, coil triggered: actual value reset

to 00000.

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4-38 Draw a Circuit Diagram with Pico

C15 F +

S

00200

IMPORTANT

The frequency counter can also be enabled specifically for a special operating state. This has the advantage that the cycle time of the device is only burdened with the frequency measurement when it is taking place. If the frequency counter is not enabled, the cycle time of the device is shorter.

Parameter Display and Parameter Set for Frequency Counter

C15 Counter function relay number 15

F Mode F: frequency counter

+ • + appears in the Parameter menu.

• - does not appear in Parameter menu.

S Setpoint, constant from 00000 to 01000 (32000 is a possible setting, the

maximum frequency is 1 kHz).

In the parameter display of a counter relay you change the mode, the setpoint and the enable of the parameter display.

Value Range

The counter relay counts between 4 and 1000 (Hz).

Parameter display in Run mode:

C15 F + S

00200

C:00153

Current setpoint, constant

Contact has not switched. Contact has switched. Actual value (0153)

Retention

Setting retention on the frequency counter serves no purpose since the frequency is continuously measured.

Publication 1760-UM001D-EN-P - September 2005

Function of the Frequency Counter

1: Counter input I3 or I4. 2: Upper Setpoint. 3: Enable coil CC... 4: Reset coil RC... 5: Contact (make contact) C... upper setpoint value reached. tg: Gate time for the frequency measurement.

• Range A: The counter is enabled. Contact C15 (C16) switches after a frequency above the setpoint was measured for the first time.

• Range B: If the actual value falls below the setpoint, the contact is reset. The removal of the enable signal resets the actual value to zero.

• Range C: The counter is enabled. After a frequency above the setpoint was measured for the first time, contact C15 (C16) switches.

• Range D: The reset coil resets the actual value to zero.

Draw a Circuit Diagram with Pico 4-39

1

2

A

3

4

5

t

t

g

t

g

t

g

g

BC

t

t

g

g

D

t

t

g

t

g

g

High Speed Counter

You can use the high-speed counters to count high frequency signals reliably.

Pico provides two high-speed up/down counters, C13 and C14, for use as required. The high-speed counter inputs are permanently connected to the digital inputs I1 and I2. These counter relays allow you to count events independently of the cycle time.

The high-speed counters allow you to enter an upper threshold value as a comparison value. The C13 and C14 high-speed counters are not dependent on the cycle time.

Counter Frequency and Pulse Shape

The maximum counter frequency is 1 kHz.

The signals must be square waves. We recommend a mark-to-space ratio of 1:1.

If this is not the case: The minimum mark-to-space ratio is 0.5 ms.

t

min

0.5

t

1

---------

×=

f

max

= minimum time of the pulse or pause duration

min

f

= maximum count frequency (1 kHz)

max

Publication 1760-UM001D-EN-P - September 2005

4-40 Draw a Circuit Diagram with Pico

-----------CC13

C13--------SN3

I6---------DC13

I8-C13-----RC13

IMPORTANT

High-speed counters operate independently of the program cycle time. The results of the actual value setpoint comparison is only transferred once every program cycle for processing in the circuit diagram. The reaction time in relation to the setpoint/actual value comparison can therefore be up to one cycle in length.

Wire a High-Speed Counter

The following assignment of the digital inputs apply.

• I1: High-speed counter input for counter C13.

• I2: High-speed counter input for counter C14.

IMPORTANT

You integrate a high-speed counter into your circuit in the form of a contact and coil.

The coils and contacts have the following meanings:

If you use C13 or C14 as high-speed counters you must enable them with the coil CC13 or CC14 accordingly.

Publication 1760-UM001D-EN-P - September 2005

Contact Coil

C13 to C14 The contact switches if the actual value is greater than

or equal to the setpoint.

CC13, CC14 Enable of the high-speed counter on 1 signal coil

activated.

DC13, DC14 Counting direction:

• Status 0, not activated, up counting.

• Status 1, activated, down counting.

RC13, RC14 Reset, coil triggered: Actual value reset to 00000.

IMPORTANT

The high-speed counter can also be enabled specifically for a special operating state. This has the advantage that the cycle time of the device is only burdened with the counting when it is taking place. If the high-speed counter is not enabled, the cycle time of the device is shorter.

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