Rockwell Automation 1766-Lxxxx User Manual

User Manual

MicroLogix 1400 Programmable Controllers

Bulletin 1766 Controllers and 1762 Expansion I/O

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.rockwellautomation.com/literature/) 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: 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.

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

Allen-Bradley, Rockwell Automation, MicroLogix, RSLinx, 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, to be sure that your controller’s firmware is at the

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.

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Summary of Changes

Notes:

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

	Table of Contents
Summary of Changes	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 Overview	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
Install Your Controller	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

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	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	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

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		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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Using Real-Time Clock and

Memory Modules

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

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
Online Editing	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	Specifications for Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	155
	Specifications for Outputs in Hazardous Locations
	(Class 1, Division 2, Groups A, B, C, D) . . . . . . . . . . . . . . . . . . . . . . .	157

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	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	MicroLogix 1400 Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	179
	Lithium Battery (1747-BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	179
	Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	179
	Battery Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	181
	Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	181
	Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	181
	Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	183
	Appendix C
Troubleshooting Your System	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

Using ControlFLASH to Upgrade Your Operating System

Appendix D

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

Connecting to Networks via RS- 232/RS-485 Interface

Appendix E

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

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

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

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Table of Contents

MicroLogix 1400 Distributed

Network Protocol (DNP3)

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

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

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Table of Contents

Connecting to Networks via Ethernet Interface

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

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	System Loading Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	371
Dissipation	System Loading Example Calculations . . . . . . . . . . . . . . . . . . . . . . . .	372
	System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	373

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Table of Contents

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

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

Glossary

Index

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

Preface

Who Should Use this Manual

Purpose of this Manual

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

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, MicroLogix 1400 Programmable Controllers 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.

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	Information on the MicroLogix 1400 Controllers instruction set.
Reference Manual 1766-RM001
MicroLogix 1400 Programmable Controllers Installation	Information on mounting and wiring the MicroLogix 1400 Controllers, including a
Instructions 1766 -IN001	mounting template for easy installation.
Advanced Interface Converter (AIC+) User Manual	A description on how to install and connect an AIC+. This manual also contains
1761-UM004	information on network wiring.
DeviceNet Interface User Manual 1761-UM005	Information on how to install, configure, and commission a DNI.
DF1 Protocol and Command Set Reference Manual 1770-6.5.16	Information on DF1 open protocol.
Modbus Protocol Specifications Available from	Information about the Modbus protocol.
www.modbus.org
Distributed Network Protocol(DNP3) Specifications Available	Information about the Distributed Network Protocol.
from www.dnp.org
Allen-Bradley Programmable Controller Grounding and Wiring	In-depth information on grounding and wiring Allen-Bradley programmable controllers.
Guidelines 1770-4.1
Application Considerations for Solid-State Controls SGI-1.1	A description of important differences between solid-state programmable controller
	products and hard-wired electromechanical devices.
National Electrical Code - Published by the National Fire	An article on wire sizes and types for grounding electrical equipment.
Protection Association of Boston, MA.
Allen-Bradley Publication Index SD499	A complete listing of current documentation, including ordering instructions. Also
	indicates whether the documents are available on CD-ROM or in multi-languages.
Allen-Bradley Industrial Automation Glossary AG-7.1	A glossary of industrial automation terms and abbreviations.

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.

•Numbered lists provide sequential steps or hierarchical information.

•Italic type is used for emphasis.

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

Chapter 1

Hardware Overview

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

44514

Left side view

1	2	3		4		5	6	7
							ESC
							OK
								44515
	13		12	11	10	9		8
					Top view

	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 for instructions on installing the
	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

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Chapter 1 Hardware Overview

Description

11Indicator LED panel

12Comm port 1 - RJ45 connector

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

Controller Input and Output Description

Catalog Number	Description
	Input	User	Embedded			Embedded	Comm. Ports
	Power	Power	Discrete I/O			Analog I/O
1766-L32BWA	100/240V AC	24V DC	12 Fast 24V DC Inputs			None	1 RS232/RS485(1)
			8	Normal 24V DC Inputs			1 Ethernet
			12		Relay Outputs		1 RS232(2)
1766-L32AWA		None	20 120V AC Inputs
			12 Relay Outputs
1766-L32BXB	24V DC		12 Fast 24V DC Inputs
			8	Normal 24V DC Inputs
			6	Relay Outputs
			3	Fast DC Outputs
			3	Normal DC Outputs
1766-L32BWAA	100/240V AC	24V DC	12 Fast 24V DC Inputs			4 Voltage Inputs
			8	Normal 24V DC Inputs		2 Voltage
			12 Relay Outputs			Outputs
1766-L32AWAA		None	20 120V AC Inputs
			12 Relay Outputs
1766-L32BXBA	24V DC		12 Fast 24V DC Inputs
			8	Normal 24V DC Inputs
			6	Relay Outputs
			3	Fast DC Outputs
			3	Normal DC Outputs

(1)Isolated RS-232/RS-485 combo port.

(2)Non-isolated RS-232. Standard D-sub connector

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.

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Hardware Overview	Chapter 1

Figure 1 - 1766-MM1 Memory Module

	ory
em
M		ule
	od
M

44536

1762 Expansion I/O

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

TIP		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.
Figure 2 -	1762 Expansion I/O
1762 Expansion I/O		1762 Expansion I/O Connected to MicroLogix 1400 Controller

44581 44563

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

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

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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

Agency Certifications

Compliance to European Union Directives

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

•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)

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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 Degree 2(1)) to reduce the effects of electrical interference (Over Voltage

Category II(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.

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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).

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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:

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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

Power Considerations

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.

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:

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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.

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.

Preventing Excessive Heat 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

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Install Your Controller	Chapter 2

Master Control Relay

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.

TIP	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.

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.

TIP	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

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Chapter 2 Install Your Controller

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

TIP	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.

TIP	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.

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Install Your Controller Chapter 2

Schematic (Using IEC Symbols)

L1

L2

230V AC

Disconnect

Fuse

MCR

230V AC

I/O

Circuits

Isolation

Operation of either of these contacts will

Transformer

remove power from the external I/O

Master Control Relay (MCR)

circuits, stopping machine motion.

X1

115V AC

X2

Cat. No. 700-PK400A1

or 230V AC

Emergency-Stop

Stop

Start

Suppressor

Fuse

Push Button

Overtravel

Cat. No. 700-N24

Limit Switch

MCR

Suppr.

MCR

MCR

115V AC or

230V AC I/O Circuits

			DC Power Supply.
			Use IEC 950/EN 60950			MCR
		_			+					24V DC
(Lo)	(Hi)
										I/O
Line Terminals: Connect to terminals of Power
		Line Terminals:								Circuits
Supply (1766-L32AWA, 1766-L32AWAA,				Connect to 24V DC terminals of
1766-L32BWA, 1766-L32BWAA).		Power Supply (1766-L32BXB, 1766-L32BXBA)							44564

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15

Chapter 2 Install Your Controller

Schematic (Using ANSI/CSA Symbols)

L1

230V AC L2

Disconnect

Fuse

MCR

230V

AC

Output

Circuits

Isolation

Operation of either of these contacts will

Transformer

remove power from the external I/O

Master Control Relay (MCR)

circuits, stopping machine motion.

X1

115V AC or

X2

Cat. No. 700-PK400A1

Emergency-Stop

230V AC

Suppressor

Fuse

Push Button

Overtravel

Stop

Start

Cat. No. 700-N24

Limit Switch

MCR

Suppr.

MCR

MCR

115V AC or

230V AC

I/O Circuits

DC Power Supply. Use

NEC Class 2 for UL

Listing.

MCR

(Lo)

(Hi)

_

+

24 V DC

I/O

Line Terminals: Connect to terminals of Power

Circuits

Supply (1766-L32AWA, 1766-L32AWAA,

Line Terminals: Connect to 24V DC terminals of

1766-L32BWA, 1766-L32BWAA).

Power Supply (1766-L32BXB, 1766-L32BXBA).

44565

Installing a Memory

Module

1. Remove the memory module port cover.

44534

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