Rockwell Automation 1766-Lxxxx User Manual

User Manual

MicroLogix 1400 Programmable Controllers

Bulletin 1766 Controllers and 1762 Expansion I/O

Important User Information

IMPORTANT

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
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/
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.

available from

) describes some

WARNING: 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.

ATTENTION: 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, and recognize the
consequence

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
surfaces may reach dangerous temperatures.

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

Allen-Bradley, Rockwell Automation, MicroLogix, RSL inx, RSLogix 500 and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Summary of Changes

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

The table below lists the sections that document new features and additional or
updated information about existing features.

Summary of Changes

Topic Page

Viewing and changing of protocol configuration through LCD 59

MicroLogix 1400 LCD Menu Structure Tree updated with Protocol Configuration 60

Protocol Configuration step-by-step guide 116

Firmware Revision History

Features are added to the controllers through firmware upgrades. See the latest
release notes, 1766-RN001
level you need. Firmware upgrades are not required, except to allow you access to
the new features. You can only upgrade firmware within the same series of
controller.

, to be sure that your controller’s firmware is at the

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 iii

Summary of Changes

Notes:

iv Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Table of Contents

Summary of Changes

Hardware Overview

Install Your Controller

Firmware Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Preface

Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Common Techniques Used in this Manual. . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 1

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Component Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MicroLogix 1400 Memory Module and Built-in Real-Time Clock. . 2

1762 Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 2

Agency Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Disconnecting Main Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Periodic Tests of Master Control Relay Circuit . . . . . . . . . . . . . . . . . 11

Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Isolation Transformers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Power Supply Inrush. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Loss of Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Input States on Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Other Types of Line Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Preventing Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Master Control Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Using Emergency-Stop Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Schematic (Using IEC Symbols) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Schematic (Using ANSI/CSA Symbols). . . . . . . . . . . . . . . . . . . . . . . . 16

Installing a Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Using the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Connecting the Battery Wire Connector . . . . . . . . . . . . . . . . . . . . . . . 19

Controller Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Controller and Expansion I/O Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mounting the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 v

Table of Contents

DIN Rail Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1762 Expansion I/O Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Mounting 1762 Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

DIN Rail Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Connecting Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Chapter 3

Wire Your Controller

Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Wiring Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Wire without Spade Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Wire with Spade Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Using Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Recommended Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Grounding the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Terminal Block Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Sinking and Sourcing Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA,

1766-L32AWAA, 1766-L32BXBA Wiring Diagrams . . . . . . . . . . . 36

Controller I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Minimizing Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Wiring Your Analog Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Analog Channel Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Minimizing Electrical Noise on Analog Channels . . . . . . . . . . . . . . . 41

Grounding Your Analog Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Expansion I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Digital Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Analog Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Chapter 4

Communication Connections

vi Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Supported Communication Protocols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Default Communication Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Using the Communications Toggle Functionality . . . . . . . . . . . . . . . . . . . 60

Changing Communication Configuration . . . . . . . . . . . . . . . . . . . . . . 61

Connecting to the RS-232 Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Making a DF1 Point-to-Point Connection. . . . . . . . . . . . . . . . . . . . . . 64

Using a Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Connecting to a DF1 Half-Duplex Network . . . . . . . . . . . . . . . . . . . . 68

Connecting to a RS-485 Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

DH-485 Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

DH-485 Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Table of Contents

Connecting the Communication Cable to the DH-485 Connector. .
74

Grounding and Terminating the DH-485 Network . . . . . . . . . . . . . 75

Connecting the AIC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Cable Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Recommended User-Supplied Components . . . . . . . . . . . . . . . . . . . . 80

Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Install and Attach the AIC+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Powering the AIC+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Connecting to DeviceNet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Cable Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Connecting to Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Ethernet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Chapter 5

Using the LCD

Operating Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Main Menu and Default Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Operating Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Using Menus to Choose Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Selecting Between Menu Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Cursor Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Setting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Viewing I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Monitor User Defined Target Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Target User Defined File Number (TUF) . . . . . . . . . . . . . . . . . . . . . . 97

Monitoring a Bit File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Monitoring Integer Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Monitoring Double Integer files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Monitor Floating point Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Monitor System Status Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Using the Mode Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Controller Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Changing Mode Switch Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Using a User Defined LCD Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

User Defined LCD Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Configuring Advanced Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Changing Key In Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Key In Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Changing Key In Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Using Communications Toggle Functionality . . . . . . . . . . . . . . . . . . . . . 122

Ethernet Network Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Viewing Ethernet Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Configuring the IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Configuring the Ethernet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

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Table of Contents

Configuring Ethernet Protocol Setup. . . . . . . . . . . . . . . . . . . . . . . . . . 130

Using Trim Pots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Trim Pot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Changing Data Value of a Trim Pot . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Trim Pot Configuration in LCD Function File . . . . . . . . . . . . . . . . 135

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Viewing System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Viewing Fault Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Saving/Loading Communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . 138

Saving Communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Loading communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

LCD setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Configuring contrast value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Configuring the backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Protocol Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Modbus RTU Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Chapter 6

Using Real-Time Clock and
Memory Modules

Online Editing

Real-Time Clock Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Operation at Power-up and Entering a Run or Test Mode. . . . . . . 147

Writing Data to the Real-Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . 147

RTC Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Memory Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

User Program , User Data, Datalog and Recipe Back-up. . . . . . . . . 149

Program Compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Data File Download Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Memory Module Write Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Removal/Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Memory Module Information File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Program /Data Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Program /Data Upload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Chapter 7

Directions and Cautions for MicroLogix 1400 Online

Editing User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

A Download is Required Before Starting Online Editing . . . . . . . . 151

Types of Online Editing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Edit Functions in Runtime Online Editing. . . . . . . . . . . . . . . . . . . . . 153

Edit Functions in Program Online Editing. . . . . . . . . . . . . . . . . . . . . 153

Appendix A

Specifications

viii Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Specifications for Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Specifications for Outputs in Hazardous Locations

(Class 1, Division 2, Groups A, B, C, D) . . . . . . . . . . . . . . . . . . . . . . . 157

Table of Contents

Specifications for Outputs in (Non-Hazardous) Locations only 158

Working Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Expansion I/O Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Digital I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Appendix B

Replacement Parts

Troubleshooting Your System

MicroLogix 1400 Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Lithium Battery (1747-BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Battery Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Appendix C

Understanding the Controller Status Indicators . . . . . . . . . . . . . . . . . . . 185

Controller Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Status Indicators on the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

I/O Status Indicators on the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Controller Error Recovery Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Analog Expansion I/O Diagnostics and Troubleshooting. . . . . . . . . . . 190

Module Operation and Channel Operation . . . . . . . . . . . . . . . . . . . 190

Power-up Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Critical and Non-Critical Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Module Error Definition Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Calling Rockwell Automation for Assistance . . . . . . . . . . . . . . . . . . . . . . 193

Appendix D

Using ControlFLASH to Upgrade
Your Operating System

Preparing for Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Install ControlFLASH Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Prepare the Controller for Firmware Upgrade . . . . . . . . . . . . . . . . . 196

Using ControlFLASH for Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . 197

ControlFLASH Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Missing or Corrupt OS state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Recovering from Missing or Corrupt OS State . . . . . . . . . . . . . . . . . 210

Appendix E

Connecting to Networks via RS­232/RS-485 Interface

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 ix

RS-232 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

RS-485 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

DF1 Full-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Table of Contents

DF1 Half-Duplex Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

DF1 Half-Duplex Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Considerations When Communicating as a DF1 Slave

on a Multi-drop Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Using Modems with MicroLogix Programmable Controllers . . . . 214

DH-485 Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

DH-485 Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Devices that use the DH-485 Network . . . . . . . . . . . . . . . . . . . . . . . . 216

Important DH-485 Network Planning Considerations . . . . . . . . . 217

Example DH-485 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Modbus Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Distributed Network Protocol (DNP3) . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Appendix F

MicroLogix 1400 Distributed
Network Protocol (DNP3)

Channel Configuration for DNP3 Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Channel 0 and Channel 2 Link Layer Configuration. . . . . . . . . . . . 227

Channel 1 Link Layer Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 228

DNP3 Slave Application Layer Configuration . . . . . . . . . . . . . . . . . 230

Channel 0 and Channel 2 Link Layer Configuration Parameters. 232

Channel 1(Ethernet) Link Layer Configuration Parameters . . . . . 236

DNP3 Slave Application Layer Configuration Parameters. . . . . . . 241

DNP3 Slave Application Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Internal Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

DNP3 Objects and MicroLogix 1400 Data Files . . . . . . . . . . . . . . . . . . . 260

DNP3 Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

DNP 3 Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

DNP3 Binary Input Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

DNP3 Binary Output Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

DNP3 Double Bit Binary Input Object. . . . . . . . . . . . . . . . . . . . . . . . 274

DNP3 Counter Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

DNP3 Frozen Counter Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

DNP3 Analog Input Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

DNP3 Analog Output Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

DNP3 BCD Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

DNP3 Data Set Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

Object Quality Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

DNP3 Device Attribute Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Event Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Generating Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Control Generating Event. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Reporting Event By Polled Response . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Reporting Event By Unsolicited Response . . . . . . . . . . . . . . . . . . . . . 313

Collision Avoidance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

x Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Table of Contents

Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Download a User Program via DNP3 Network . . . . . . . . . . . . . . . . . . . . 317

Default Directories and Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

Generating *.IMG files using RSLogix 500/RSLogix Micro . . . . . 318

Rules for File Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

Rules for Downloading a User Program . . . . . . . . . . . . . . . . . . . . . . . 321

Rules for Uploading a User Program . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Rules for Initializing a User Program . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Rules for uploading Communication Status Files. . . . . . . . . . . . . . . 324

Starting and Stopping User Programs (Mode Change) via DNP3

Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Initialize User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Start User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Stop User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Diagnostics for Ethernet Channel (Channel 1). . . . . . . . . . . . . . . . . 332

Diagnostics for Secure Authentication . . . . . . . . . . . . . . . . . . . . . . . . 339

Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Implementation Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Connecting to Networks via
Ethernet Interface

Appendix G

MicroLogix 1400 Controllers and Ethernet Communication . . . . . . . 355

MicroLogix 1400 Performance Considerations . . . . . . . . . . . . . . . . . . . . 356

MicroLogix 1400 and PC Connections to the

Ethernet Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

Ethernet Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

Connecting an Ethernet switch on the Ethernet Network. . . . . . . 357

Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358

Ethernet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360

Duplicate IP address Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361

Configuring the Ethernet Channel on the MicroLogix 1400 . . . . . . . . 362

Configuration Using RSLogix 500/RSLogix Micro Programming

Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

Configuration Via BOOTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

Using the Rockwell Automation BOOTP/DHCP Utility . . . . . . 365

Using a DHCP Server To Configure Your Processor . . . . . . . . . . . . . . . 367

Using Subnet Masks and Gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

Manually Configuring Channel 1 for Controllers on

Subnets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

MicroLogix 1400 Embedded Web Server Capability . . . . . . . . . . . . . . . 369

Appendix H

System Loading and Heat
Dissipation

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 xi

System Loading Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371

System Loading Example Calculations . . . . . . . . . . . . . . . . . . . . . . . . 372

System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Table of Contents

Current Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Calculating Heat Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Glossary

Index

xii Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

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 MicroLogix 1400 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 MicroLogix 1400 controllers and expansion
I/O. It describes the procedures you use to install, wire, and troubleshoot your
controller. This manual:

• explains how to install and wire your controllers

• gives you an overview of the MicroLogix 1400 controller system

Refer to publication 1766-RM001
Instruction Set Reference Manual for the MicroLogix 1400 instruction set and
for application examples to show the instruction set in use. Refer to your
RSLogix 500/RSLogix Micro programming software user documentation for
more information on programming your MicroLogix 1400 controller.

, MicroLogix 1400 Programmable Controllers

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 xv

Preface

Related Documentation

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

Resource Description

MicroLogix 1400 Programmable Controllers Instruction Set
Reference Manual 1766-RM001

MicroLogix 1400 Programmable Controllers Installation
Instructions 1766 -IN001

Information on the MicroLogix 1400 Controllers instruction set.

Information on mounting and wiring the MicroLogix 1400 Controllers, including a
mounting template for easy installation.

Advanced Interface Converter (AIC+) User Manual

1761-UM004

DeviceNet Interface User Manual 1761-UM005

DF1 Protocol and Command Set Reference Manual 1770-6.5.16

Modbus Protocol Specifications Available from

www.modbus.org

Distributed Network Protocol(DNP3) Specifications Available
from www.dnp.org

Allen-Bradley Programmable Controller Grounding and Wiring
Guidelines 1770-4.1

Application Considerations for Solid-State Controls SGI-1.1

National Electrical Code - Published by the National Fire
Protection Association of Boston, MA.

Allen-Bradley Publication Index SD499 A complete listing of current documentation, including ordering instructions. Also

Allen-Bradley Industrial Automation Glossary AG-7.1

Common Techniques Used in this Manual

The following conventions are used throughout this manual:

• Bulleted lists such as this one provide information, not procedural steps.

A description on how to install and connect an AIC+. This manual also contains
information on network wiring.

Information on how to install, configure, and commission a DNI.

Information on DF1 open protocol.

Information about the Modbus protocol.

Information about the Distributed Network Protocol.

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.

indicates whether the documents are available on CD-ROM or in multi-languages.

A glossary of industrial automation terms and abbreviations.

• Numbered lists provide sequential steps or hierarchical information.

• Italic type is used for emphasis.

xvi Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Hardware Overview

1

4451544514

Left side view Top view

Chapter

1

Hardware Features

The Bulletin 1766, MicroLogix 1400 programmable controller contains a power
supply, input and output circuits, a processor, an isolated combination
RS-232/485 communication port, an Ethernet port, and a non-isolated RS-232
communication port. Each controller supports 32 discrete I/O points(20 digital
inputs, 12 discrete outputs) and 6 analog I/O points(4 analog inputs and 2 analog
outputs : 1766-L32BWAA, 1766-AWAA and 1766-BXBA only).

The hardware features of the controller are shown below.

1

256 7

43

ESC

OK

9101113 12

Description

1 Comm port 2 - 9-pin D-Shell RS-232C connector

2 Memory module (refer to MicroLogix 1400 Memory Module Installation Instructions, publication 1766-IN010A

memory module).

3 User 24V (for 1766-BWA and 1766-BWAA only)

4 Input terminal block

5 LCD Display Keypad (ESC, OK, Up, Down, Left, Right)

6 Battery compartment

7 1762 expansion bus connector

8 Battery connector

9 Output terminal block

10 LCD Display

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 1

8

for instructions on installing the

Chapter 1 Hardware Overview

Description

11 Indicator LED panel

12 Comm port 1 - RJ45 connector

13 Comm port 0 - 8-pin mini DIN RS-232C/RS-485 connector

Controller Input and Output Description

Catalog Number Description

Input
Power

1766-L32BWA 100/240V AC 24V DC 12 Fast 24V DC Inputs

1766-L32AWA None 20 120V AC Inputs

1766-L32BXB 24V DC 12 Fast 24V DC Inputs

1766-L32BWAA 100/240V AC 24V DC 12 Fast 24V DC Inputs

1766-L32AWAA None 20 120V AC Inputs

1766-L32BXBA 24V DC 12 Fast 24V DC Inputs

(1)

Isolated RS-232/RS-485 combo port.

(2)

Non-isolated RS-232. Standard D-sub connector

User
Power

Embedded
Discrete I/O

8 Normal 24V DC Inputs
12 Relay Outputs

12 Relay Outputs

8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs

8 Normal 24V DC Inputs
12 Relay Outputs

12 Relay Outputs

8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs

Embedded
Analog I/O

None 1 RS232/RS485

4 Voltage Inputs
2 Voltage
Outputs

Comm. Ports

1 Ethernet

(2)

1 RS232

(1)

Component Descriptions

MicroLogix 1400 Memory Module and Built-in Real-Time Clock

The controller has a built-in real-time clock to provide a reference for
applications that need time-based control.

The controller is shipped with a memory module port cover in place. You can
order a memory module, 1766-MM1, as an accessory. The memory module
provides optional backup of your user program and data, and is a means to
transport your programs between controllers.

The program and data in your MicroLogix 1400 is non-volatile and is stored
when the power is lost to the controller. The memory module provides additional
backup that can be stored separately. The memory module does not increase the
available memory of the controller.

2 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 1 - 1766-MM1 Memory Module

TIP

M

o

d

u

l

e

M

e

m

o

ry

44536

1762 Expansion I/O 1762 Expansion I/O Connected to MicroLogix 1400 Controller

4456344581

1762 Expansion I/O

Hardware Overview Chapter 1

1762 expansion I/O can be connected to the MicroLogix 1400 controller, as
shown below.

Figure 2 - 1762 Expansion I/O

Expansion I/O

Catalog Number Description

Digital

1762-IA8 8-Point 120V AC Input Module

1762-IQ8 8-Point Sink/Source 24V DC Input Module

1762-IQ16 16-Point Sink/Source 24V DC Input Module

1762-IQ32T 32-Point Sink/Source 24V DC Input Module

1762-OA8 8-Point 120/240V AC Triac Output Module

1762-OB8 8-Point Sourcing 24V DC Output Module

A maximum of seven I/O modules, in any combination, can be
connected to a controller. See Appendix H to determine how much
heat a certain combination generates.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 3

Chapter 1 Hardware Overview

Expansion I/O

Catalog Number Description

1762-OB16 16-Point Sourcing 24V DC Output Module

1762-OB32T 32-Point Sourcing 24V DC Output Module

1762-OV32T 32-Point Sinking 24V DC Output Module

1762-OW8 8-Point AC/DC Relay Output Module

1762-OW16 16-Point AC/DC Relay Output Module

1762-OX6I 6-Point Isolated AC/DC Relay Output Module

1762-IQ8OW6 8-Point Sink/Source 24V DC Input and 6-Point AC/DC Relay Output

Module

Analog

1762-IF4 4-Channel Voltage/Current Analog Input Module

1762-OF4 4-Channel Voltage/Current Analog Output Module

1762-IF2OF2 Combination 2-Channel Input 2-Channel Output Voltage/Current

Analog Module

Temperature

1762-IR4 4-Channel RTD/Resistance Input Module

1762-IT4 4-Channel Thermocouple/mV Input Module

Communication Cables

Use only the following communication cables with the MicroLogix 1400
controllers. These cables are required for Class I Div. 2 applications.

• 1761-CBL-AM00 Series C or later

• 1761-CBL-AP00 Series C or later

• 1761-CBL-PM02 Series C or later

• 1761-CBL-HM02 Series C or later

• 2707-NC9 Series C or later

• 1763-NC01 Series A or later

• 1747-CP3 Series A or later

ATTENTION: UNSUPPORTED CONNECTION
Do not connect a MicroLogix 1400 controller to another MicroLogix
family controller such as MicroLogix 1000, MicroLogix 1200,
MicroLogix 1500, or the network port of a 1747-DPS1 Port Splitter
using a 1761-CBL-AM00 (8-pin mini-DIN to 8-pin mini-DIN) cable or
equivalent.
This type of connection will cause damage to the RS-232/485
communication port (Channel 0) of the MicroLogix 1400 and/or the
controller itself. The communication pins used for RS-485
communications on the MicroLogix 1400 are alternately used for
24V power on the other MicroLogix controllers and the network
port of the 1747-DPS1 Port Splitter.

Programming

Programming the MicroLogix 1400 controller is done using
RSLogix 500/RSLogix Micro, Revision 8.10.00 or later for Series A controllers

4 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Hardware Overview Chapter 1

and 8.30.00 or later for Series B controllers. Communication cables for
programming are available separately from the controller and software.

Communication Options

The MicroLogix 1400 controllers provide three communications ports, an
isolated combination RS-232/485 communication port (Channel 0), an
Ethernet port (Channel 1) and a non-isolated RS-232 communication port
(Channel 2).

The Channel 0 and Channel 2 ports on the MicroLogix 1400 can be connected
to the following:

• operator interfaces, personal computers, etc. using DF1 Full Duplex
point-to-point

• a DH-485 network

• a DF1 Radio Modem network

• a DF1 half-duplex network as an RTU Master or RTU Slave

• a Modbus network as an RTU Master or RTU Slave

• an ASCII network

• a DeviceNet network as a slave or peer using a DeviceNet Interface

(catalog number 1761-NET-DNI)

• an Ethernet network using the Ethernet Interface module (catalog number
1761-NET-ENI, or 1761-NET-ENIW)

• a DNP3 network as a Slave

When connecting to RS-485 network using DH-485, DF1 Half-Duplex
Master/Slave, Modbus RTU Master/Slave or DNP3 Slave protocols, the
MicroLogix 1400 can be connected directly via Channel 0 without an Advanced
Interface Converter, catalog number 1761-NET-AIC. The Channel 0 combo
port provides both RS-232 and RS-485 isolated connections. The appropriate
electrical interface is selected through your choice of communication cable. The
existing MicroLogix 1761 communication cables provide an interface to the
RS-232 drivers. The 1763-NC01 cable provides an interface to the RS-485
drivers.

The controller may also be connected to serial devices, such as bar code readers,
weigh scales, serial printers, and other intelligent devices, using ASCII. See
Default Communication Configuration on page 60 for the configuration settings
for Channel 0. MicroLogix 1400 can be connected directly to RS-485 network
via channel 0, using ASCII.

The MicroLogix 1400 supports EtherNet/IP communication via the Ethernet
communication Channel 1. In addition, either Modbus TCP or DNP3 over IP
can be enabled for Channel 1. You can connect your controller to a local area
network that provides communication between various devices at 10 Mbps or
100 Mbps. This port supports CIP explicit messaging (message exchange) only.
The controller cannot be used for CIP implicit messaging (real-time I/O
messaging). The controller also includes an embedded web server which allows

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 5

Chapter 1 Hardware Overview

viewing of not only module information, TCP/IP configuration, and diagnostic
information, but also includes the data table memory map and data table monitor
screen using a standard web browser.

See Chapter 4 for more information on connecting to the available
communication options.

6 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Chapter

2

Install Your Controller

This chapter shows you how to install your controller. The only tools you require
are a flat or Phillips head screwdriver and drill. Topics include:

• agency certifications

• compliance to European Union Directives

• installation considerations

• safety considerations

• power considerations

• preventing excessive heat

• master control relay

• installing a memory module

• using the battery

• controller mounting dimensions

• controller and expansion I/O spacing

• mounting the controller

• mounting 1762 expansion I/O

• connecting 1762 expansion I/O

Agency Certifications

Compliance to European Union Directives

• UL Listed Industrial Control Equipment for use in Class I, Division 2,
Hazardous Locations, Groups A, B, C, D

• CE marked for all applicable directives

• C-Tick marked for all applicable acts

• C-UL Listed Industrial Control Equipment for use in Canada

This product has the CE mark and 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 Council Directive 2004/108/EC Electromagnetic
Compatibility (EMC) and the following standards, in whole or in part,
documented in a technical construction file:

• EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 7

Chapter 2 Install Your Controller

• EN 61131-2; Programmable Controllers (Clause 11)

• EN 61000-6-4

EMC - Part 6-4: Generic Standards - Emission Standard for Industrial
Environments

• EN 61000-6-2
EMC - Part 6-2: Generic Standards - Immunity for Industrial
Environments

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 2006/95/ECLow Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers, Part
2 - Equipment Requirements and Tests.

For specific information required by EN 61131-2, see the appropriate sections in
this publication, as well as the following Allen-Bradley publications:

• Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1

• Guidelines for Handling Lithium Batteries, publication AG-5.4

• Automation Systems Catalog, publication B115

Installation Considerations

Most applications require installation in an industrial enclosure (Pollution

(1)

Degree 2
Category II

) to reduce the effects of electrical interference (Over Voltage

(2)

) and environmental exposure. Locate your controller as far as
possible from power lines, load lines, and other sources of electrical noise such as
hard-contact switches, relays, and AC motor drives. For more information on
proper grounding guidelines, see the Industrial Automation Wiring and
Grounding Guidelines publication 1770-4.1

ATTENTION: Electrostatic discharge can damage semiconductor
devices inside the controller. Do not touch the connector pins or
other sensitive areas.

ATTENTION: Vertical mounting of the controller is not supported
due to heat build-up considerations.

(1)

Pollution Degree 2 is an environment where normally only non-conductive pollution occurs except that
occasionally temporary conductivity caused by condensation shall be expected.

(2)

Overvoltage Category II is the load level section of the electrical distribution system. At this level, transient
voltages are controlled and do not exceed the impulse voltage capability of the products insulation.

.

8 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

ATTENTION: Be careful of metal chips when drilling mounting
holes for your controller or other equipment within the enclosure or
panel. Drilled fragments that fall into the controller or I/O modules
could cause damage. Do not drill holes above a mounted controller
if the protective debris shields are removed or the processor is
installed.

WARNING: Do not place the MicroLogix 1400 Programmable
Controller in direct sunlight. Prolonged exposure to direct sunlight
could degrade the LCD display and have adverse effects on the
controller.
The controller is not designed for outdoor use.

Safety Considerations

Safety considerations are an important element of proper system installation.
Actively thinking about the safety of yourself and others, as well as the condition
of your equipment, is of primary importance. We recommend reviewing the
following safety considerations.

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to
use in hazardous locations.

WARNING: EXPLOSION HAZARD

• Substitution of components may impair suitability for Class I,
Division 2.

• Do not replace components or disconnect equipment unless power
has been switched off.

• Do not connect or disconnect components unless power has been
switched off.

• This product must be installed in an enclosure. All cables
connected to the product must remain in the enclosure or be
protected by conduit or other means.

• All wiring must comply with N.E.C. article 501-4(b).

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 9

Chapter 2 Install Your Controller

Use only the following communication cables in Class I, Division 2 hazardous
locations.

Environment Classification Communication Cables

Class I, Division 2 Hazardous Environment 1761-CBL-AC00 Series C or later

1761-CBL-AM00 Series C or later

1761-CBL-AP00 Series C or later

1761-CBL-PM02 Series C or later

1761-CBL-HM02 Series C or later

2707-NC9 Series C or later

1763-NC01 Series A or later

1747-CP3 Series

Disconnecting Main Power

WARNING: Explosion Hazard

Do not replace components, connect equipment, or disconnect
equipment unless power has been switched off.

The main power disconnect switch should be located where operators and
maintenance personnel have quick and easy access to it. In addition to
disconnecting electrical power, all other sources of power (pneumatic and
hydraulic) should be de-energized before working on a machine or process
controlled by a controller.

Safety Circuits

WARNING: Explosion Hazard

Do not connect or disconnect connectors while circuit is live.

Circuits installed on the machine for safety reasons, like overtravel limit switches,
stop push buttons, and interlocks, should always be hard-wired directly to the
master control relay. These devices must be wired in series so that when any one
device opens, the master control relay is de-energized, thereby removing power to
the machine. Never alter these circuits to defeat their function. Serious injury or
machine damage could result.

Power Distribution

There are some points about power distribution that you should know:

10 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

• The master control relay must be able to inhibit all machine motion by
removing power to the machine I/O devices when the relay is
de-energized. It is recommended that the controller remain powered even
when the master control relay is de-energized.

• If you are using a DC power supply, interrupt the load side rather than the
AC line power. This avoids the additional delay of power supply turn-off.
The DC power supply should be powered directly from the fused
secondary of the transformer. Power to the DC input and output circuits
should be connected through a set of master control relay contacts.

Periodic Tests of Master Control Relay Circuit

Any part can fail, including the switches in a master control relay circuit. The
failure of one of these switches would most likely cause an open circuit, which
would be a safe power-off failure. However, if one of these switches shorts out, it
no longer provides any safety protection. These switches should be tested
periodically to assure they will stop machine motion when needed.

Power Considerations

The following explains power considerations for the micro controllers.

Isolation Transformers

You may want to use an isolation transformer in the AC line to the controller.
This type of transformer provides isolation from your power distribution system
to reduce the electrical noise that enters the controller and is often used as a
step-down transformer to reduce line voltage. Any transformer used with the
controller must have a sufficient power rating for its load. The power rating is
expressed in volt-amperes (VA).

Power Supply Inrush

During power-up, the MicroLogix 1400 power supply allows a brief inrush
current to charge internal capacitors. Many power lines and control transformers
can supply inrush current for a brief time. If the power source cannot supply this
inrush current, the source voltage may sag momentarily.

The only effect of limited inrush current and voltage sag on the MicroLogix 1400
is that the power supply capacitors charge more slowly. However, the effect of a
voltage sag on other equipment should be considered. For example, a deep voltage
sag may reset a computer connected to the same power source. The following
considerations determine whether the power source must be required to supply
high inrush current:

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 11

Chapter 2 Install Your Controller

• The power-up sequence of devices in a system.

• The amount of the power source voltage sag if the inrush current cannot be

supplied.

• The effect of voltage sag on other equipment in the system.

If the entire system is powered-up at the same time, a brief sag in the power source
voltage typically will not affect any equipment.

Loss of Power Source

The power supply is designed to withstand brief power losses without affecting
the operation of the system. The time the system is operational during power loss
is called program scan hold-up time after loss of power. The duration of the
power supply hold-up time depends on the type and state of the I/O, but is
typically between 10 milliseconds and 3 seconds. When the duration of power
loss reaches this limit, the power supply signals the processor that it can no longer
provide adequate DC power to the system. This is referred to as a power supply
shutdown. The processor then performs an orderly shutdown of the controller.

Preventing Excessive Heat

Input States on Power Down

The power supply hold-up time as described above is generally longer than the
turn-on and turn-off times of the inputs. Because of this, the input state change
from “On” to “Off” that occurs when power is removed may be recorded by the
processor before the power supply shuts down the system. Understanding this
concept is important. The user program should be written to take this effect into
account.

Other Types of Line Conditions

Occasionally the power source to the system can be temporarily interrupted. It is
also possible that the voltage level may drop substantially below the normal line
voltage range for a period of time. Both of these conditions are considered to be a
loss of power for the system.

For most applications, normal convective cooling keeps the controller within the
specified operating range. Ensure that the specified temperature range is
maintained. Proper spacing of components within an enclosure is usually
sufficient for heat dissipation.

In some applications, a substantial amount of heat is produced by other
equipment inside or outside the enclosure. In this case, place blower fans inside

12 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

TIP

TIP

the enclosure to assist in air circulation and to reduce “hot spots” near the
controller.

Additional cooling provisions might be necessary when high ambient
temperatures are encountered.

Do not bring in unfiltered outside air. Place the controller in an
enclosure to protect it from a corrosive atmosphere. Harmful
contaminants or dirt could cause improper operation or damage to
components. In extreme cases, you may need to use air conditioning to
protect against heat build-up within the enclosure.

Master Control Relay

A hard-wired master control relay (MCR) provides a reliable means for
emergency machine shutdown. Since the master control relay allows the
placement of several emergency-stop switches in different locations, its
installation is important from a safety standpoint. Overtravel limit switches or
mushroom-head push buttons are wired in series so that when any of them opens,
the master control relay is de-energized. This removes power to input and output
device circuits. Refer to the figures on pages 15 and 16.

ATTENTION: Never alter these circuits to defeat their function
since serious injury and/or machine damage could result.

If you are using an external DC power supply, interrupt the DC output
side rather than the AC line side of the supply to avoid the additional
delay of power supply turn-off.

The AC line of the DC output power supply should be fused.

Connect a set of master control relays in series with the DC power
supplying the input and output circuits.

Place the main power disconnect switch where operators and maintenance
personnel have quick and easy access to it. If you mount a disconnect switch
inside the controller enclosure, place the switch operating handle on the outside
of the enclosure, so that you can disconnect power without opening the
enclosure.

Whenever any of the emergency-stop switches are opened, power to input and
output devices should be removed.

When you use the master control relay to remove power from the external I/O
circuits, power continues to be provided to the controller’s power supply so that
diagnostic indicators on the processor can still be observed.

The master control relay is not a substitute for a disconnect to the controller. It is
intended for any situation where the operator must quickly de-energize I/O
devices only. When inspecting or installing terminal connections, replacing

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 13

Chapter 2 Install Your Controller

TIP

TIP

output fuses, or working on equipment within the enclosure, use the disconnect
to shut off power to the rest of the system.

Do not control the master control relay with the controller. Provide
the operator with the safety of a direct connection between an
emergency-stop switch and the master control relay.

Using Emergency-Stop Switches

When using emergency-stop switches, adhere to the following points:

• Do not program emergency-stop switches in the controller program. Any
emergency-stop switch should turn off all machine power by turning off
the master control relay.

• Observe all applicable local codes concerning the placement and labeling
of emergency-stop switches.

• Install emergency-stop switches and the master control relay in your
system. Make certain that relay contacts have a sufficient rating for your
application. Emergency-stop switches must be easy to reach.

• In the following illustration, input and output circuits are shown with
MCR protection. However, in most applications, only output circuits
require MCR protection.

The following illustrations show the Master Control Relay wired in a grounded
system.

In most applications input circuits do not require MCR protection;
however, if you need to remove power from all field devices, you must
include MCR contacts in series with input power wiring.

14 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Schematic (Using IEC Symbols)

Disconnect

Isolation
Tr an sf or me r

Emergency-Stop
Push Button

Fuse MCR

230V AC
I/O
Circuits

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.

Fuse

Overtravel
Limit Switch

MCR

MCR

MCR

Stop Start

Line Terminals: Connect to terminals of Power
Supply (1766-L32AWA, 1766-L32AWAA,
1766-L32BWA, 1766-L32BWAA).

115V AC or
230V AC
I/O Circuits

L1

L2

230V AC

Master Control Relay (MCR)
Cat. No. 700-PK400A1

Suppressor
Cat. No. 700-N24

MCR

Suppr.

24V DC
I/O
Circuits

(Lo)

(Hi)

DC Power Supply.
Use IEC 950/EN 60950

X1 X2

115V AC
or 230V AC

Line Terminals: Connect to 24V DC terminals of
Power Supply (1766-L32BXB, 1766-L32BXBA)

_

+

44564

Install Your Controller Chapter 2

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 15

Chapter 2 Install Your Controller

Emergency-Stop
Push Button

230V AC

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.

Fuse MCR

Fuse

MCR

MCR

MCR

Stop

Start

Line Terminals: Connect to terminals of Power
Supply (1766-L32AWA, 1766-L32AWAA,
1766-L32BWA, 1766-L32BWAA).

Line Terminals: Connect to 24V DC terminals of
Power Supply (1766-L32BXB, 1766-L32BXBA).

230V AC
Output
Circuits

Disconnect

Isolation
Transformer

115V AC or
230V AC
I/O Circuits

L1

L2

Master Control Relay (MCR)
Cat. No. 700-PK400A1

Suppressor
Cat. No. 700-N24

(Lo)

(Hi)

DC Power Supply. Use
NEC Class 2 for UL
Listing

.

X1 X2

115V AC or
230V AC

_

+

MCR

24 V DC
I/O
Circuits

Suppr.

Overtravel
Limit Switch

44565

44534

Schematic (Using ANSI/CSA Symbols)

Installing a Memory Module

16 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

1. Remove the memory module port cover.