Rockwell Automation 1761 User Manual

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Allen-Bradley

MicroLogix 1000 Programmable Controllers

(Bulletin

1761 Controllers)

User Manual

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes, and standards.

The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based on the examples shown in this publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Control (available from your local Allen-Bradley office), describes some important dif equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc., is prohibited.

Throughout this manual, we use notes to make you aware of safety considerations:

ferences between solid-state

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

Attention statements help you to:

• identify a hazard

• avoid the hazard

•

recognize the consequences

Note Identifies information that is critical for successful application and

understanding of the product.

SLC 500, SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04, MicroLogix, DTAM, DTAM Micro, PanelView, RediPANEL, Dataliner, DH+, and Data Highway Plus are trademarks of Rockwell Automation. PLC-2, PLC-5 are registered trademarks of Rockwell Automation. A.I. Series and WINtelligent LINX are trademarks of Rockwell Software Inc.

able of Contents

Preface P–1.

1 Installing Your Controller 1–1.

2 Wiring Your Controller 2–1.

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

Who

Should Use this Manual Purpose of this Manual Common T

Allen-Bradley Support P–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Compliance to European Union Directives 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Overview 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Master Control Relay Using Sur Safety Considerations Power Considerations Preventing Excessive Heat

Controller Spacing 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting the Controller 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Grounding

Sinking and Sourcing Circuits 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iring Recommendations

W Wiring Diagrams, Discrete Input and Output V Analog Cable Recommendation

Minimizing Electrical Noise on Analog Controllers 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Y

Analog Voltage and Current Input and Output Ranges 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Your Controller for High–Speed Counter Applications 2–24. . . . . . . . . . . . . . . . . . . .

echniques Used in this Manual

ge Suppressors

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

Guidelines

our Analog Channels

P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

P–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware

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

1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

oltage Ranges

2–7. . . . . . . . . . . . . . . . . . . . . .

2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Connecting the System 3–1.

Connecting the DF1 Protocol 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting to a DH-485 Network 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting the AIC+

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

3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

toc–i

MicroLogix 1000 Programmable Controllers User Manual

Preface

Establishing Communication 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DeviceNet Communications

Programming

3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Programming Overview 4–1.

Principles of Machine Control 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understanding File Organization 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understanding How Processor Files are Stored and Accessed Addressing Data Files

Applying Ladder Logics to Your Schematics 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Developing Your Logic Program – A Model 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Using Analog 5–1.

I/O Image 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O Configuration 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Filter and Update Times 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Converting Analog Data 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Using Basic Instructions 6–1.

About

the Basic Instructions

Bit Instructions Overview 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Examine if Closed (XIC) 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Examine if Open (XIO) 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Energize (OTE) 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Latch (OTL) and Output Unlatch (OTU) 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

One-Shot Rising (OSR) 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Timer Instructions Overview 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Timer On-Delay (TON) 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Timer Off-Delay (TOF) 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Retentive Timer (RTO) 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Counter Instructions Overview 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Count Up (CTU) 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Count Down (CTD) 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reset (RES) 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic Instructions in the Paper Drilling Machine Application Example 6–21. . . . . . . . . . . . .

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

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

4–6. . . . . . . . . . . . . . . . . . . . . .

4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Using Comparison Instructions 7–1.

About the Comparison Instructions 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Comparison Instructions Overview 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

toc–ii

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

able of Contents

Equal (EQU) 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Not Equal (NEQ) 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Less Than (LES) 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Less Than or Equal (LEQ) 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Greater Than (GRT) 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Greater Than or Equal (GEQ) 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Masked Comparison for Equal (MEQ) 7–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Limit Test (LIM) 7–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Comparison Instructions in the Paper Drilling Machine Application Example 7–8. . . . . . . . .

8 Using Math Instructions 8–1.

About

the Math Instructions

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

Math Instructions Overview 8–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Add (ADD) 8–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Subtract (SUB) 8–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32-Bit Addition and Subtraction 8–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Multiply (MUL) 8–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Divide (DIV) 8–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Double Divide (DDV) 8–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clear (CLR) 8–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Square Root (SQR) 8–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scale Data (SCL) 8–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Math Instructions in the Paper Drilling Machine Application Example 8–14. . . . . . . . . . . . .

9 Using Data Handling Instructions 9–1.

About the Data Handling Instructions 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Convert to BCD (TOD) 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Convert from BCD (FRD) 9–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Decode 4 to 1 of 16 (DCD) 9–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Encode 1 of 16 to 4 (ENC) 9–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copy File (COP) and Fill File (FLL) Instructions 9–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Move and Logical Instructions Overview 9–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Move (MOV) Masked Move (MVM)

And (AND) 9–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Or (OR) 9–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exclusive Or (XOR) 9–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Not (NOT) 9–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Negate (NEG) 9–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FIFO and LIFO Instructions Overview 9–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FIFO Load (FFL) and FIFO Unload (FFU) 9–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIFO Load (LFL) and LIFO Unload (LFU) 9–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

9–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

toc–iii

MicroLogix 1000 Programmable Controllers User Manual

Preface

Data Handling Instructions in the Paper Drilling Machine Application Example 9–28. . . . . .

10 Using Program Flow Control Instructions 10–1.

About the Program Flow Control Instructions 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jump (JMP) and Label (LBL) 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jump to Subroutine (JSR), Subroutine (SBR), and Return (RET) 10–4. . . . . . . . . . . . . . . . . .

Master Control Reset (MCR)

Temporary End (TND) 10–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Suspend (SUS) 10–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Immediate Input with Mask (IIM) 10–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Immediate Output with Mask (IOM) 10–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

w C

Program Flo A

pplication Example 10–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ontrol Instruction

11 Using Application Specific Instructions 11–1.

s i

n the Paper Drillin

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

About the Application Specific Instructions 11–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit Shift Instructions Overview 11–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit Shift Left (BSL) 11–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit Shift Right (BSR) 11–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sequencer Instructions Overview 11–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sequencer Output (SQO) and Sequencer Compare (SQC) 11–7. . . . . . . . . . . . . . . . . . . . . . . .

Sequencer Load (SQL) 11-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selectable Timed Interrupt (STI) Function Overview 11–15. . . . . . . . . . . . . . . . . . . . . . . . . .

Selectable Timed Disable (STD) and Enable (STE) 11–18. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selectable Timed Start (STS) 11–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interrupt Subroutine (INT) 11–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Specific Instructions in the Paper Drilling Machine

Application Example 11–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

10–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

g M

achine

12 Using High-Speed Counter Instructions 12–1.

About the High-Speed Counter Instructions 12–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter Instructions Overview 12–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter (HSC) 12–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter Load (HSL) 12-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter Reset (RES) 12–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter Reset Accumulator (RAC) 12–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-Speed Counter Interrupt Enable (HSE) and Disable (HSD) 12–23. . . . . . . . . . . . . . . . .

Update High-Speed Counter Image Accumulator (OTE) 12–24. . . . . . . . . . . . . . . . . . . . . . . .

What Happens to the HSC When Going to REM Run Mode High-Speed Counter Instructions in the Paper Drilling Machine

Application Example 12–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

toc–iv

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

12–25. . . . . . . . . . . . . . . . . . . . .

able of Contents

13 Using the Message Instruction 13–1.

Types of Communication 13–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Message Instruction (MSG)

Timing Diagram for a Successful MSG Instruction 13–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MSG Instruction Error Codes 13–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Examples that Use the MSG Instruction 13–12. . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting

14 Troubleshooting Your System 14–1.

Understanding the Controller LED Status 14–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Controller Error Recovery Model 14–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identifying Controller Faults 14–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calling Allen-Bradley for Assistance

Reference

A Hardware Reference A–1.

Controller Specifications A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Controller Dimensions A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacement Parts

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

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

13–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

14–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Programming Reference B–1.

Controller Status File B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Instruction Execution T

C Valid Addressing Modes and File Types for Instruction Parameters C–1.

Available File Types C–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vailable Addressing Modes

D Understanding the Communication Protocols D–1.

RS-232 Communication Interface D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DF1 Full-Duplex Protocol D–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DF1 Half-Duplex Slave Protocol D–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DH-485 Communication Protocol D–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

imes and Memory Usage

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

B–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . .

C–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

toc–v

MicroLogix 1000 Programmable Controllers User Manual

Preface

E Application Example Programs E–1.

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

Paper Drilling Machine Application Example E–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Driven Sequencer Application Example E–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Event Driven Sequencer Application Example E–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bottle Line Example E–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pick and Place Machine Example E–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RPM Calculation Application Example

On/Off Circuit Application Example E–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spray Booth Application Example E–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustable Timer Application Example E–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F Optional Analog Input Software Calibration F–1.

Calibrating an Analog Input Channel F–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary G–1.

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

E–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

toc–vi

Summary of Changes

The

information below summarizes the changes to this manual since the last

printing as Publication 1761-6.3 — December 1997.

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

New Information

The

table below lists sections that document new features and additional

information about existing features, and shows where to find this new information.

For This New Information See

Power supply inrush page 1–13

Summary of Changes

Updated Information

Changes from the previous release of this manual that require you to reference information differently are as follows:

• The DeviceNet communications information has been updated; see chapter 3,

Connecting the System.

• For updated information on automatic protocol switching, see chapter 3,

Connecting the System.

• The MicroLogix 1000 programmable controllers’ VA ratings and power supply

inrush specifications have been updated; see appendix A, Hardware Reference.

• The DF1 Full-Duplex and DH-485 configuration parameters have been updated;

see appendix D, Understanding Communication Protocols.

soc–i

MicroLogix 1000 Programmable Controllers User Manual

Preface

Notes:

soc–ii

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

•

conventions used in this manual

• Allen-Bradley support

P–1

MicroLogix 1000 Programmable Controllers User Manual

Preface

Who Should Use this Manual

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use MicroLogix 1000 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.

Purpose of this Manual

This manual is a reference guide for MicroLogix 1000 controllers. It describes the procedures you use to install, wire, program, and troubleshoot your controller. This manual:

• explains how to install and wire your controllers

• gives you an overview of the MicroLogix 1000 controller system

• provides the MicroLogix 1000 controllers’ instruction set

•

contains application examples to show the instruction set in use

P–2

See your programming software user manual for information on programming your MicroLogix 1000 controller. For information on using the Hand-Held Programmer with the MicroLogix 1000 controllers, see the MicroLogix 1000 with Hand-Held Programmer (HHP) User Manual, Publication 1761-6.2.

Contents of this Manual

Tab Chapter Title Contents

Preface

Describes the purpose, background, and scope of this manual. Also specifies the audience for whom this manual is intended.

Hardware

Programming

1 2 3 Connecting the System

4 Programming Overview

5 Using Analog

6 Using Basic Instructions

Installing Your Controller

Wiring Your Controller Provides wiring guidelines and diagrams.

Using Comparison Instructions

Using Math Instructions

Using Data Handling Instructions

Using Program Flow Control Instructions

Using Application Specific Instructions

Using High-Speed Counter Instructions

Using the Message Instruction

Provides controller installation procedures and system safety considerations.

Gives information on wiring your controller system for the DF1 protocol or DH-485 network.

Provides an overview of principles of machine control, a section on file organization and addressing, and a program development model.

Provides information on I/O image file format, I/O configuration, input filter and update times, and conversion of analog data.

Describes how to use ladder logic instructions for relay replacement functions, counting, and timing.

Describes how to use the instructions to compare values of data in your ladder logic program.

Describes how to use the ladder logic instructions that perform basic math functions.

Describes how to perform data handling instructions, including move and logical instructions and FIFO and LIFO instructions.

Describes the ladder logic instructions that affect program flow and execution.

Describes the bit shift, sequencer and STI related instructions.

Describes the four modes of the high-speed counter and its related instructions.

Provides a general overview of the types of communication, and explains how to establish network communication using the message instruction.

Troubleshooting 14

Troubleshooting Your System

Explains how to interpret and correct problems with your MicroLogix 1000 controller system.

P–3

MicroLogix 1000 Programmable Controllers User Manual

Rf c

Preface

Tab ContentsTitleChapter

Appendix A Hardware Reference

Appendix B

Appendix C

Reference

Appendix D

Programming Reference

Valid Addressing Modes and File Types for Instruction Parameters

Understanding the Communication Protocols

Provides physical, electrical, environmental, and functional specifications.

Explains the system status file and provides instruction execution times.

Provides a listing of the instructions along with their parameters and valid file types.

Contains descriptions of the DF1 protocol and DH-485 network.

Appendix E

Appendix F

Application Example Programs

Optional Analog Input Software Calibration

Glossary

Provides advanced application examples for the high-speed counter, sequencer, bit shift, and message instructions.

Explains how to calibrate your controller using software offsets.

Contains definitions for terms and abbreviations that are specific to this product.

P–4

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.

Allen-Bradley Support

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

Local Product Support

Contact your local Allen-Bradley representative for:

•

sales and order support

• product technical training

• warranty support

•

support service agreements

Technical Product Assistance

you need to contact Allen-Bradley for technical assistance, please review the information in the Tr representative.

oubleshooting

chapter first. Then call your local Allen-Bradley

Your Questions or Comments on this Manual

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

Allen-Bradley Company, Inc. Control and Information Group T

echnical Communication, Dept. 602V

.O. Box 2086

Milwaukee, WI 53201-2086 or visit our internet page at:

http://www.ab.com/micrologix

P–6

, T122

Installing Your Controller

This chapter shows you how to install your controller system. The only tools you require are a Flat head or Phillips head screwdriver and drill. T

• compliance to European Union Directives

• hardware overview

• master control relay

• sur

•

• controller spacing

• mounting the controller

ge suppressors safety considerations power considerations preventing excessive heat

opics include:

Hardware

1–1

MicroLogix 1000 Programmable Controllers User Manual

Preface

Compliance to European Union Directives

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

EMC Directive

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

• EN 50081-2

EMC – Generic Emission Standard, Part 2 – Industrial Environment

• EN 50082-2

EMC – Generic Immunity Standard, Part 2 – Industrial Environment

This product is intended for use in an industrial environment.

1–2

Hardware Overview

The MicroLogix 1000 programmable controller is a packaged controller containing a power supply, input circuits, output circuits, and a processor. The controller is available in 10 I/O, 16 I/O and 32 I/O configurations, as well as an analog version with 20 discrete I/O and 5 analog I/O.

The catalog number for the controller is composed of the following:

Installing Your Controller

Bulletin Number

Base Unit

Unit I/O Count: 20

Input Signal: A = 120V ac B = 24V dc

1761-L20AWA-5A

Analog I/O

Analog Circuits: Inputs = 4

Outputs = 1

Power Supply: A = 120/240V ac B = 24V dc

Output Type: W = Relay B = MOSFET

A = Triac

Hardware

The hardware features of the controller are:

1 2 3

4 5

8 9

POWER RUN FAULT FORCE

OUT

Input terminals

dc output terminals (or not used)

Mounting hole Input LEDs

Status LEDs

5 6

RS-232 communication channel

Output LEDs

Power supply line power

Ground screw Output terminals

20142

1–3

MicroLogix 1000 Programmable Controllers User Manual

Preface

Master Control Relay

A hard-wired master control relay (MCR) provides a reliable means for emergency controller shutdown. Since the master control relay allows the placement of several emer

gency-stop switches in dif 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 figure on page 1–6.

ferent locations, its installation is important from a

Note If

Never alter these cir machine damage could result.

you ar

e using an external dc output power supply rather than the ac line side of the supply to avoid the additional delay of power supply turn-off.

The external ac line of the dc output power supply should be fused.

Connect a set of master contr 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 emer 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’ diagnostic indicators on the processor can still be observed.

cuits to defeat their function, since serious injury and/or

, interrupt the dc output side

ol r

elays in series with the dc power supplying the

gency-stop switches are opened, power to input and

s power supply so that

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-ener only. When inspecting or installing terminal connections, replacing output fuses, or working on equipment within the enclosure, use the disconnect to shut off power to the rest of the system.

Note Do

with the safety of a dir master contr

1–4

not contr

ol the master contr

ect connection between an emer

ol r

elay.

ol r

elay with the contr

gize I/O devices

oller. Pr

gency-stop switch and the

ovide the operator

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 emer

gency-stop switches.

• Install emer

Make certain that relay contacts have a suf Emer

gency-stop switches and the master control relay in your system.

gency-stop switches must be easy to reach.

• In the following illustration, input and output circuits are shown with MCR

protection. However protection.

Installing Your Controller

ficient rating for your application.

, in most applications, only output circuits require MCR

Hardware

1–5

MicroLogix 1000 Programmable Controllers User Manual

L1 L2

Preface

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

Note The

illustrations only show output cir applications input cir r

emove power fr

om all field devices, you must include MCR contacts in series with

input power wiring.

Schematic (Using IEC Symbols)

230V ac

Disconnect

Isolation Transformer

230V ac

Fuse

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

Emergency-Stop Push Button

cuits do not r

Overtravel Limit Switch

cuits with MCR pr

equire MCR pr

Stop

otection. In most

otection; however

Fuse

Master Control Relay (MCR)

Start

Cat. No. 700-PK400A1

, if you need to

MCR

Suppressor Cat. No. 700-N24

MCR

230V ac I/O Circuits

1–6

(Lo) (Hi)

erminals: Connect to 230V ac

Line T terminals of Power Supply

MCR

Suppr.

230V ac I/O Circuits

24V dc I/O Circuits

MCR

dc Power Supply Use IEC 950/EN 60950

—

Line terminals: Connect to 24V dc terminals of Power Supply

Schematic (Using ANSI/CSA Symbols)

L1 L2

230V ac

Disconnect

Fuse

Installing Your Controller

MCR

230V ac Output Circuits

Isolation Transformer

115V ac

Fuse

Operation of either of these contacts will remove power from the adapter external I/O

circuits, stopping machine motion.

(Lo) (Hi)

Line T terminals of Power Supply

Emergency-Stop Push Button

erminals: Connect to 1

Overtravel Limit Switch

15V ac

Stop

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

Suppressor Cat. No. 700-N24

15V ac Output Circuits

MCR

Start

MCR

dc Power Supply Use N.E.C. Class 2 for UL Listing.

—

Line terminals: Connect to 24V dc terminals of Power Supply

MCR

Suppr.

24V dc Output Circuits

Hardware

1–7

MicroLogix 1000 Programmable Controllers User Manual

Preface

Using Surge Suppressors

Inductive

load devices such as motor starters and solenoids require the use of some type of surge suppression to protect the controller output contacts. Switching inductive loads without sur

ge suppression can

significantly reduce the lifetime of relay contacts. By adding a suppression device directly across the coil of an inductive device, you will prolong the life of the switch contacts. Y

ou will also reduce the effects of voltage transients caused by interrupting the current to that inductive device, and will prevent electrical noise from radiating into system wiring.

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

dc or L1

or dc

Outputs

VAC/VDC

OUT 0

OUT OUT 2 OUT 3 OUT OUT 5

OUT 6 OUT 7

COM

Snubber

dc COM or L2

If you connect a micro controller FET output to an inductive load, we recommend that you use an 1N4004 diode for sur

ge suppression, as shown in the illustration that

follows.

1–8

Relay

or Solid State

dc Outputs

VAC/VDC

OUT 0

OUT OUT 2 OUT 3 OUT OUT 5

OUT 6 OUT 7

COM

+24V

24V dc common

IN4004 Diode

Installing Your Controller

Suitable sur an RC network, or an Allen-Bradley sur components must be appropriately rated to suppress the switching transient characteristic of the particular inductive device. See the table on page 1–10 for recommended suppressors.

Output Device

Varistor

If you connect a micro controller triac output to control an inductive load, we recommend that you use varistors to suppress noise. Choose a varistor that is appropriate for the application. The suppressors we recommend for triac outputs when switching 120V ac inductive loads are a Harris MOV LA10A, or an Allen-Bradley MOV, catalog number 599-K04 or 599-KA04. Consult the varistor manufacturer’s data sheet when selecting a varistor for your application.

For inductive dc load devices, a diode is suitable. An 1N4004 diode is acceptable for most applications. A sur page 1–10 for recommended suppressors.

ge suppression methods for inductive ac load devices include a varistor

ge suppressor

Surge Suppression for Inductive ac Load Devices

Output DeviceOutput Device Output Device

RC Network

, all shown below. These

Surge

Suppressor

, part number V175

ge suppressor can also be used. See the table on

Hardware

As shown in the illustration below

, these sur

ge suppression circuits connect directly across the load device. This reduces arcing of the output contacts. (High transient can cause arcing that occurs when switching of

Surge Suppression for Inductive dc Load Devices

—

Output Device

(A surge suppressor can also be used.)

Diode

f an inductive device.)

1–9

MicroLogix 1000 Programmable Controllers User Manual

Preface

Recommended Surge Suppressors

We recommend the Allen-Bradley sur

ge suppressors shown in the following table

for use with Allen-Bradley relays, contactors, and starters.

Device Coil Voltage

Bulletin 509 Motor Starter Bulletin 509 Motor Starter

Bulletin 100 Contactor Bulletin 100 Contactor

Bulletin 709 Motor Starter 120V ac 1401-N10 Bulletin 700 Type R, RM Relays ac coil None Required Bulletin 700 Type R Relay

Bulletin 700 Type RM Relay Bulletin 700 Type R Relay

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

120V ac 240V ac

12V dc 12V dc

24V dc 24V dc

48V dc 48V dc

115-125V dc 115-125V dc

230-250V dc 230-250V dc

Suppressor Catalog

599-K04 599-KA04

199-FSMA1 199-FSMA2

700-N22 700-N28

700-N10 700-N13

700-N16 700-N17

700-N11 700-N14

700-N12 700-N15

Number

1–10

Miscellaneous electromagnetic devices limited to 35 sealed VA

150V max, ac or DC 700-N24

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.

Disconnecting Main Power

Explosion Hazard — Do not replace components or disconnect equipment unless power has been switched off and the area is known to be non-hazardous.

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.

Installing Your Controller

Hardware

Safety Circuits

Explosion Hazard — Do not connect or disconnect connectors while circuit is live unless ar

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 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.

ea is known to be non-hazardous.

. These devices must be wired in series so that when any one device

1–11

MicroLogix 1000 Programmable Controllers User Manual

Preface

Power Distribution

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

• 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.

• 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 is 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 no longer provides any safety protection. These switches should be tested periodically to assure they will stop machine motion when needed.

, if one of these switches shorts out, it

1–12

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 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

The MicroLogix power supply does not require or need a high inrush current. However, if the power source can supply a high inrush current, the MicroLogix power supply will accept it. There is a high level of inrush current when a large capacitor on the input of the MicroLogix is charged up quickly.

If the power source cannot supply high inrush current, the only effect is that the MicroLogix input capacitor char determine whether the power source needs to supply a high inrush current:

• power

• power source sag if it cannot source inrush current

• the effect of the voltage sag on other equipment

-up sequence of devices in system

ges up more slowly

Installing Your Controller

. The following considerations

If the power source cannot provide high inrush current when the entire system in an application is powered, the MicroLogix powers-up more slowly. If part of an application’ powered, the source voltage may sag while the MicroLogix input capacitor is charging. A power source voltage sag can affect other equipment connected to the same power source. For example, a voltage sag may reset a computer connected to the same power source.

s system is already powered and operating when the MicroLogix is

1–13

MicroLogix 1000 Programmable Controllers User Manual

Preface

Loss of Power Source

The

power supply is designed to withstand brief power losses without af 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 20 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.

fecting the

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.

Hardware

1–14

Preventing Excessive Heat

For most applications, normal convective cooling keeps the controller within the specified operating range. Ensure that the specified operating 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 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.

Installing Your Controller

Note Do

it fr operation or damage to components. In extr conditioning to pr

not bring in unfilter

om a corr

osive atmospher

otect against heat build-up within the enclosur

ed outside air

. Place the contr

e. Harmful contaminants or dirt could cause impr

eme cases, you may need to use air

oller in an enclosure to pr

otect oper

1–15

MicroLogix 1000 Programmable Controllers User Manual

Preface

Controller Spacing

The following figure shows the recommended minimum spacing for the controller. (Refer to appendix A for controller dimensions.)

Explosion Hazard — For Class I, Division 2 applications, this product must be installed in an enclosure. All cables connected to the product must remain in the enclosur

e or be pr

otected by conduit or other means.

Top

Bottom

Mounting the Controller

This

equipment is suitable for Class I, Division 2, Groups A, B, C, D or

non-hazardous locations only, when product or packaging is marked.

Explosion Hazard:

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

•

Be car

eful of metal chips when drilling mounting holes for your controller. Drilled fragments that fall into the controller could cause damage. Do not drill holes above a mounted controller if the protective wrap is removed.

The controller should be mounted horizontally within an enclosure, using a DIN rail or mounting screws.

A. Greater than or equal to 50.8 mm (2 in.).

SideSide

B. Greater than or equal to 50.8 mm (2 in.).

20142

1–16

Using a DIN Rail

Installing Your Controller

Use 35 mm (1.38 in.) DIN rails, such as item number 199-DR1 or 1492-DR5 from Bulletin 1492.

To install your controller on the DIN rail:

1.Mount your DIN rail. (Make sure that the placement of the controller on the DIN rail meets the recommended spacing requirements. Refer to controller dimensions in appendix A.)

2.Hook the top slot over the DIN rail.

3.While pressing the controller against the rail, snap the controller into position.

4.Leave the protective wrap attached until you are finished wiring the controller.

To remove your controller from the DIN rail:

e a screwdriver in the DIN rail latch at

1.Pla the bottom of the controller.

2.Holding the controller, pry downward on the latch until the controller is released from the DIN rail.

DIN Rail

Side View

Protective Wrap

DIN Rail

Call-out Dimension

84 mm (3.3 in.)

33 mm (1.3 in.)

16 mm (.63 in.)

Mounting Template

20146

Hardware

DIN Rail

20147

1–17

MicroLogix 1000 Programmable Controllers User Manual

Preface

Using Mounting Screws

To install your controller using mounting screws:

Note Leave the protective wrap attached

until you are finished wiring the controller.

1.Use the mounting template from the MicroLogix 1000

Programmable Controllers Installation Instructions,

publication 1761-5.1.2 or

MicroLogix 1000 (Analog) Programmable Controllers Installation Instructions,

publication 1761-5.1.3, that was shipped with your controller.

2.Secure the template to the mounting surface. (Make sure your controller is spaced properly.)

3.Drill holes through the template.

4.Remove the mounting template.

5.Mount the controller.

Mounting Your Controller Vertically

Mounting Template

Protective Wrap (remove after wiring)

1–18

Your controller can also be mounted vertically within an enclosure using mounting screws or a DIN rail. To insure the stability of your controller, we recommend using mounting screws.

To insure the controller’s reliability, the following environmental specifications must not be exceeded.

Top

Bottom

Greater than or equal

to 50.8 mm (2 in.).

SideSide

Description: Specification:

Operating Temperature

Operating Shock (Panel mounted)

Operating Shock (DIN rail mounted)

➀

DC input voltage derated linearly from +30°C (30V to 26.4V).

Discrete:

0°C to +45°C (+32

Analog: 0°C to +40°C (+32

9.0g peak acceleration (11±1 ms duration) 3 times each direction, each axis

7.0g peak acceleration (11±1 ms duration) 3 times each direction, each axis

°F to +113°F) °F to +113°F)

➀ ➀

Note: When mounting your controller vertically, the nameplate should be facing downward.

Wiring Your Controller

This chapter describes how to wire your controller. T

• grounding guidelines

•

sinking and sourcing circuits

• wiring recommendations

• wiring diagrams, input voltage ranges, and output voltage ranges

opics include:

Hardware

2–1

MicroLogix 1000 Programmable Controllers User Manual

Preface

Grounding Guidelines

In solid-state control systems, grounding helps limit the effects of noise due to electromagnetic interference (EMI). Use the heaviest wire gauge listed for wiring your controller with a maximum length of 152.4 mm (6 in.). Run the ground connection from the ground screw of the controller (third screw from left on output terminal rung) to the ground bus.

Note

This symbol denotes a functional earth ground terminal which pr impedance path between electrical cir as noise immunity impr

All devices that connect to the user 24V power supply or to the RS-232 channel must be refer procedure may result in property damage or personal injury.

Chassis gr connected. You must connect the chassis ground terminal scr ground prior to connecting any devices.

On the 1761-L10BWB, 1761-L16BWB, 1761-L16BBB, 1761-L20BWB-5A, 1761-L32BBB, and 1761-L32BWB controllers, the user supply 24 V dc IN and chassis gr

enced to chassis gr

ound, user 24V ground, and RS-232 ground are internally

ound are internally connected.

ovement.

cuits and earth for

ound or floating. Failure to follow this

non-safety

Protective Wrap (remove after wiring)

ovides a low

purposes, such

ew to chassis

2–2

You must also provide an acceptable grounding path for each device in your application. For more information on proper grounding guidelines, see the

Industrial Automation W

Remove the protective wrap before applying power to the controller. Failure to remove the wrap may cause the controller to overheat.

iring and Gr

ounding Guidelines

publication 1770-4.1.

Sinking and Sourcing Circuits

Any of the MicroLogix 1000 DC inputs can be configured as sinking or sourcing depending on how the DC COM is wired on the MicroLogix.

Type Definition

The input energizes when high-level voltage is applied to the input terminal

Sinking Input

Sourcing Input

Sinking and Sourcing Wiring Examples

1761-L32BWA (Wiring diagrams also apply to 1761-L20BWA-5A,

-L16BWA, -L10BWA.)

(active high). Connect the power supply VDC (–) to the MicroLogix DC COM terminal.

The input energizes when low-level voltage is applied to the input terminal (active low). Connect the power supply VDC (+) to the MicroLogix DC COM terminal.

Wiring Your Controller

Sinking Inputs

VDC (–) for Sinking

24V –

COM

DC OUT

Sourcing Inputs

VDC (+) for Sourcing

24V –

COM

DC OUT

Sourcing Inputs

14–30

VDC (+) for Sinking

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18 I/19

VDC (+) for Sourcing

DC COM

I/9 I/10

Sinking

VDC (–) for Sourcing

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18 I/19

VDC (–) for Sinking

DC COM

I/9 I/10

VDC

Inputs

14–30 VDC

VDC (–) for Sourcing

VDC (+) for Sinking

2–3

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L32BWB, -L32BBB (Wiring Diagrams also apply to 1761-L20BWB-5A,

-L16BWB, -L10BWB, -L16BBB.)

Sinking

Inputs

Sourcing Inputs

14–30 VDC

VDC

(+) for Sinking

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

NOT USED

VDC (–) for Sinking

NOT

USED

COM

Sourcing Inputs

14–30 VDC

VDC (–) for Sourcing

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

COM

NOT USED

VDC (+) for Sourcing

NOT USED

Wiring Recommendations

VDC (+) for Sourcing

DC COM

VDC (–) for Sinking

DC COM

14–30 VDC

I/9 I/10

Sinking Inputs

14–30 VDC

I/9 I/10

VDC (–) for Sourcing

I/19

VDC (+) for Sinking

I/19

2–4

Before you install and wire any device, disconnect power to the controller system.

The following are general recommendations for wiring your controller system.

• Each wire terminal accepts 2 wires of the size listed below:

Wire Type Wire Size (2 wire maximum per terminal screw)

Solid #14 to #22 AWG Stranded #16 to #22 AWG

Refer to page 2–24 for wiring your high-speed counter.

Wiring Your Controller

Note The

output terminals of the micr

We recommend using either of the following AMP spade lugs: part number 53120-1, if using 22–16 AWG, or part number 53123-1, if using 16–14 AWG.

Note If

you use wir pressur wher

diameter of the terminal scr

es without lugs, make sur

ew heads is 5.5 mm (0.220 in.). The input and

o contr

oller ar

e designed for the following spade lugs:

Call-out Dimension

C E L W X C+X

6.35 mm (0.250 in.)

10.95 mm (0.431 in.) maximum

14.63 mm (0.576 in.) maximum

6.35 mm (0.250 in.)

3.56 mm (0.140 in.)

9.91 mm (0.390 in.) maximum

e the wir

es ar

e secur

ely captur

ed by the

e plate. This is particularly important at the four end terminal positions

e the pr

essur

e plate does not touch the outside wall.

Hardware

20148i

Be car

eful when stripping wir

es. W

ire fragments that fall into the controller could cause damage. Do not strip wires above a mounted controller if the protective wrap is removed.

Protective Wrap (remove after wiring)

2–5

MicroLogix 1000 Programmable Controllers User Manual

Preface

Remove the protective wrap before applying power to the controller. Failure to remove the wrap may cause the controller to overheat.

Calculate the maximum possible current in each power and common wire. Observe all electrical codes dictating the maximum current allowable for each wir overheat, which can cause damage.

e size. Curr

ent above the maximum ratings may cause wiring to

United States Only: If the controller is installed within a potentially hazardous environment, all wiring must comply with the requirements stated in the National Electrical Code 501-4 (b).

• Allow for at least 50 mm (2 in.) between I/O wiring ducts or terminal strips and

the controller.

• Route incoming power to the controller by a path separate from the device

wiring. Where paths must cross, their intersection should be perpendicular.

Note Do

conduit. Wir paths.

• Separate wiring by signal type. Bundle wiring with similar electrical

characteristics together.

• Separate input wiring from output wiring.

• Label wiring to all devices in the system. Use tape, shrink-tubing, or other

dependable means for labeling purposes. In addition to labeling, use colored insulation to identify wiring based on signal characteristics. For example, you may use blue for dc wiring and red for ac wiring.

not run signal or communications wiring and power wiring in the same

es with different signal characteristics should be r

outed by separate

Hardware

2–6

Wiring Your Controller

Wiring Diagrams, Discrete Input and Output Voltage Ranges

The following pages show the wiring diagrams, discrete input voltage ranges, and discrete output voltage ranges. Controllers with dc inputs can be wired as either sinking or sourcing configurations. (Sinking and sourcing does not apply to ac inputs.)

Note

This symbol denotes a functional earth ground terminal which pr impedance path between electrical cir as noise immunity impr

ovement.

cuits and earth for non-safety purposes, such

ovides a low

The 24V dc sensor power sour circuits. It should only be used to power input devices (e.g. sensors, switches). Refer to page 1–4 for information on MCR wiring in output circuits.

1761-L16AWA Wiring Diagram

79–132V

L2/N

85–264 VAC

NOT USED

L2/N

AC COM

VAC

O/0

VDC

CR CR

VAC V

COM

AC 1

NOT USED

1761-L16AWA Input Voltage Range

0V ac 20V ac

ce should not be used to power output

L2/N L1

AC COM

VAC VDC

AC 2

O/1

V COM

AC 2

VAC VDC

VDC 1

79–132V ac

VAC

O/2 O/3

VDC

VDC 2

VDC 1

VDC 2

COM

I/9I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8

VAC

O/4

VDC

VDC 3

79V ac

O/5

VDC 3 COM

132V ac

Off

1761-L16AWA Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

2–7

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L32AWA Wiring Diagram

79–132V

L1 L2/N L1

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

AC COM

NOT USED

AC COM

L2/N

I/9 I/10

79–132V ac

I/19

85–264 VAC

L1 L2/N

VAC

V COM

AC 1

VAC

O/0

VDC

CR CR CRCR CR

AC 2

O/1

V COM

AC 2

VAC VDC

VDC 1

O/2 O/3

VDC 1 COM

VAC VDC

VDC 2

1761-L32AWA Input Voltage Range

0V ac 20V ac

Off

1761-L32AWA Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

O/4 O/5 O/6

VAC

O/8O/7 O/9 O/10 O/11

VDC

CR CRCR CR

VDC 3 VDC 2 COM

79V ac

VDC 3 COM

132V ac

2–8

Operating

Range

1761-L10BWA Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–3 for additional configuration options.

14–30V dc

VDC Com

VDC +

VDC Com

VDC +

Wiring Your Controller

24V –

I/0 I/1 I/2 I/3 I/4 I/5

COM

DC OUT

V V

COM

AC 1 AC 1

85–264 VAC

L2/N

VAC

O/0

VDC

CR CR CR

1761-L10BWA Input Voltage Range

0V dc 5V dc 0V dc 5V dc

Off

VAC VDC

VAC

DC COM

VAC

O/1

VDC

VDC 1

AC 2

COM

NOT USED

VAC

O/2 O/3

VDC

VDC 2

VDC 2 COM

14V dc 14V dc

NOT USED

VDC 3

NOT USED

VDC 3 COM

26.4V dc @ 55° C (131° F) 30V dc @ 30° C (86° F)

HardwareHardware

1761-L10BWA Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

2–9

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L16BWA Wiring Diagrams (Sinking Input Configuration)

Note: Refer to page 2–3 for additional configuration options.

14–30V dc

VDC +

I/9

24V –

DC OUT

VDC +

VDC Com

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8

COM

DC COM

VDC Com

HardwareHardware

V V

COM

AC 1 AC 1

85–264 VAC

L2/N

VAC

O/0

VDC

CR CR CR

VAC

1761-L16BWA Input Voltage Range

0V dc 5V dc 0V dc 5V dc

Off

1761-L16BWA Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

O/1

V COM

AC 2

VAC VDC

VDC 1

VDC 1 COM

14V dc 14V dc

VAC

O/2 O/3

VDC

VDC 2

VDC 2 COM

VAC VDC

VDC 3

O/4

O/5

VDC 3 COM

26.4V dc @ 55° C (131° F) 30V dc @ 30° C (86° F)

2–10

Operating

Range

1761-L32BWA Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–3 for additional configuration options.

14-30 V dc

VDC Com

VDC

VDC Com

Wiring Your Controller

VDC +

24V –

DC OUT

85–264 VAC

L1 L2/N

VAC

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18 I/19

COM

VAC

O/0

VDC

CR CR CRCR CR

AC 1

COM

VAC VDC

AC 2

O/1

V COM

AC 2

DC COM

VAC VDC

VDC 1

O/2 O/3

VDC 1 COM

VAC VDC

VDC 2

1761-L32BWA Input Voltage Range

0V dc 5V dc 0V dc 5V dc 14V dc

Off

1761-L32BWA Output Voltage Range

I/9 I/10

O/4 O/5 O/6

14V dc

VAC

O/8O/7 O/9 O/10 O/11

VDC

CR CRCR CR

VDC 3 VDC 2 COM

VDC 3 COM

26.4V dc @ 55° C (131° F) 30V dc @ 30° C (86° F)

HardwareHardware

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

2–11

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L10BWB Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–4 for additional configuration options.

14–30 VDC

VDC Com

VDC +

VDC Com

14–30 VDC

VDC +

NOT USED

24V –

I/0 I/1 I/2 I/3 I/4 I/5

COM

VAC

O/0

VDC

VDC 1 VDC 1

COM

NOT USED

1761-L10BWB Input Voltage Range

0V dc 5V dc 14V dc

Off

1761-L10BWB Output Voltage Range

VAC VDC

AC 1

O/1

V COM

AC 1

VAC VDC

DC COM

VDC 2

NOT USED

VAC

O/2 O/3

VDC

VDC 3 VDC 2 COM

VDC 3 COM

NOT USED

NOT

USED

NOT

USED

26.4V dc @ 55° C (131° F)

Hardware

2–12

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

1761-L16BWB Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–4 for additional configuration options.

VDC Com

14–30V dc

VDC +

VDC Com

14–30V dc

VDC +

Wiring Your Controller

NOT USED

24V –

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8

COM

VAC

O/0

VDC

CR CR CR

AC 1

VDC 1 VDC 1

COM

NOT USED

1761-L16BWB Input Voltage Range

0V dc 5V dc 14V dc

Off

1761-L16BWB Output Voltage Range

O/1

V COM

AC 1

DC COM

VAC VDC

VDC 2

VDC 2 COM

VAC

O/2 O/3

VDC

VDC 3

VDC 3 COM

VAC VDC

VDC 4

O/4 O/5

VDC 4 COM

I/9

Hardware

26.4V dc @ 55° C (131° F)

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

2–13

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L32BWB Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–4 for additional configuration options.

NOT USED

Sinking Configuration

14–30V dc

VDC Com

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

COM

VDC +

DC COM

VDC +

Sourcing Configuration

I/9 I/10

14–30V dc

VDC Com

I/19

Hardware

DC IN

24V –

VDC 1

VDC 1 COM

VAC VDC

VAC

O/0

VDC

CR CR CRCR CR

AC 1

O/1

V COM

AC 1

VAC VDC

VDC 2

O/2 O/3

VDC 2 COM

1761-L32BWB Input Voltage Range

0V dc 5V dc 14V dc

Off

1761-L32BWB Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

VAC

O/4 O/5 O/6

VDC

VDC 3

VAC

O/8O/7 O/9 O/10 O/11

VDC

CR CRCR CR

VDC 4 VDC 3 COM

VDC 4 COM

26.4V dc @ 55° C (131° F)

2–14

Operating

Range

1761-L32AAA Wiring Diagram

79–132V

L1 L2/N L1

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

NOT USED

AC COM

L2/N

AC COM

I/9 I/10

Wiring Your Controller

79–132V ac

I/19

85–264 VAC

L1 L2/N

VAC

V COM

AC 0

VAC VDC

VAC

O/0

VDC

CR CR CRCR CR

AC 1

O/1

V COM

AC 1

VAC

O/2 O/3

AC 2

1761-L32AAA Input Voltage Range

0V ac 20V ac

Off

1761-L32AAA Output Voltage Range

0V ac 264V ac85V ac

V COM

AC 2

VAC

O/4 O/5 O/6

AC 3

VAC

O/8O/7 O/9 O/10 O/11

CR CRCR CR

AC 4

AC 3

COM

79V ac

Operating

Range

V COM

AC 4

132V ac

2–15

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L16BBB Wiring Diagrams (Sinking Input Configuration)

Note: Refer to page 2–4 for additional configuration options.

VDC Com

14–30V dc

VDC +

VDC Com

14–30V dc

VDC +

DC IN

24V –

VDC 1 COM

NOT USED

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8

COM

VAC

O/0

VDC

AC 1

V COM

AC 1

AC 2

VDC 1

NOT USED

1761-L16BBB Input Voltage Range

0V dc 5V dc 14V dc

Off

1761-L16BBB Output Voltage Range

O/1

V COM

AC 2

DC COM

DC 24V+

VDC 2

Sourcing Outputs

O/2 O/3 O/4 O/5

VDC 2 COM

DC 24V–

I/9

NOT USED

26.4V dc @ 55° C (131° F)

Hardware

2–16

0V dc 26.4V dc20.4V dc

Operating

Range

1761-L32BBB Wiring Diagram (Sinking Input Configuration)

ЙЙЙЙЙЙЙЙЙ

Note: Refer to page 2–4 for additional configuration options.

NOT USED

DC IN

24V –

VDC 1

NOT USED

Sinking Configuration

14–30V dc

VDC Com

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11 I/12 I/13 I/14 I/15 I/16 I/17 I/18

COM

VAC VDC

AC 1

VDC 1 COM

V COM

AC 1

VDC +

VAC

O/0

VDC

AC 2

V COM

VDC +

DC COM

O/1

O/2 O/3 O/4 O/5 O/6

24V+

VDC 2

AC 2

VDC 2 COM

I/9 I/10

Sourcing Outputs

Sourcing Configuration

14–30V dc

O/8O/7 O/9 O/10 O/11

Wiring Your Controller

NOT

24V–

USED

VDC Com

I/19

1761-L32BBB Input Voltage Range

0V dc 5V dc

Off

1761-L32BBB Output Voltage Range

0V dc 26.4V dc20.4V dc

14V dc

26.4V dc @ 55° C (131° F)

Operating

Range

2–17

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L20AWA-5A Wiring Diagram

Note: Refer to pages 2–21 through 2–23 for additional information on analog

wiring.

79–132V

L1 L2/N L1

VAC VDC

AC 2

O/1

V COM

AC 2

AC COM

VAC VDC

VDC 1

O/2 O/3

VDC 1 COM

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11

VAC

O/0

VDC

CR CR CRCR CR

NOT USED

85–264 VAC

L1 L2/N

L2/N

NOT

USED

COM

VAC

AC 1

COM

1761-L20AWA-5A Input Voltage Range

0V ac 20V ac

Off

79–132V ac

VAC VDC

VDC 2

I/9 I/10

O/4 O/5 O/6

O/7

VDC 2 COM

79V ac

NOT USED

IA SHD

OA SHD

IA/0 V (+)

OA/0 V (+)

IA/1 V (+)

Analog Channel

Analog Channels

OA/0 I (+)

IA (–)

I (+)

SHD

OA (–)

(–)

I (+)

IA/3

IA/2

132V ac

1761-L20AWA-5A Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

2–18

Operating

Range

1761-L20BWA-5A Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–3 for additional discrete configuration options.

Refer to pages 2–21 through 2–23 for additional information on analog wiring.

Analog Channels

VDC (–)

VDC (+)

VDC (–)

14–30V dc

VDC (+)

Wiring Your Controller

24V –

DC OUT

85–264 VAC

L1 L2/N

VAC

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11

COM

VAC

O/0

VDC

CR CR CRCR CR

AC 1

COM

VAC VDC

DC COM

VAC

O/1

VDC

AC 2

V COM

AC 2

VDC 1

O/2 O/3

VDC 1 COM

VAC VDC

VDC 2

I/9 I/10

O/4 O/5 O/6

O/7

VDC 2 COM

1761-L20BWA-5A Discrete Input Voltage Range

0V dc 5V dc 0V dc 5V dc

Off

14V dc 14V dc

1761-L20BWA-5A Relay Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

NOT USED

OA SHD

IA/0 V (+)

OA/0 V (+)

IA/1 V (+)

OA/0 I (+)

Analog Channel

(–)

OA (–)

IA SHD

26.4V dc @ 55° C (131° F) 30V dc @ 30° C (86° F)

IA SHD

I (+)

(–)

IA/3

IA/2

I (+)

Operating

Range

2–19

MicroLogix 1000 Programmable Controllers User Manual

Preface

1761-L20BWB-5A Wiring Diagram (Sinking Input Configuration)

Note: Refer to page 2–4 for additional discrete configuration options.

Refer to pages 2–21 through 2–23 for additional information on analog wiring.

NOT USED

14–30V dc

(–)

I/0 I/1 I/2 I/3 I/4 I/5 I/6 I/7 I/8 I/11

DC COM

VDC

VDC +

VDC (–)

DC COM

14–30V dc

I/9 I/10

VDC (+)

IA SHD

IA/0 V (+)

IA/1 V (+)

Analog Channels

IA (–)

IA SHD

IA/2 I (+)

IA/3

(–)

I (+)

DC IN

24V –

VDC 1

VDC 1 COM

VAC

O/0

VDC

CR CR CRCR CR

AC 1

O/1

V COM

AC 1

VAC VDC

VDC 2

O/2 O/3

VDC 2 COM

VAC VDC

VDC 3

O/4 O/5 O/6

O/7

VDC 3 COM

NOT USED

1761-L20BWB-5A Discrete Input Voltage Range

0V dc 5V dc 14V dc

Off

1761-L20BWB-5A Relay Output Voltage Range

0V ac 264V ac5V ac 0V dc 125V dc5V dc

Operating

Range

OA SHD

V (+)

Analog Channel

(–)

I (+)

OA/0

26.4V dc @ 55° C (131° F)

2–20

Wiring Your Controller

Minimizing Electrical Noise on Analog Controllers

Inputs on analog employ digital high frequency filters that significantly reduce the ef

fects of electrical noise on input signals. However applications and environments where analog controllers are installed and operating, it is impossible to ensure that all environmental noise will be removed by the input filters.

, because of the variety of

Several specific steps can be taken to help reduce the ef on analog signals:

• install the MicroLogix 1000 system in a properly rated (i.e., NEMA) enclosure.

Make sure that the MicroLogix 1000 system is properly grounded.

• use Belden cable #8761 for wiring the analog channels making sure that the

drain wire and foil shield are properly earth grounded at one end of the cable.

• route the Belden cable separate from any other wiring. Additional noise

immunity can be obtained by routing the cables in grounded conduit.

A system may malfunction due to a change in the operating environment after a period of time. We recommend periodically checking system operation, particularly when new machinery or other noise sources are installed near the MicroLogix 1000 system.

Grounding Your Analog Cable

Use

shielded communication cable (Belden #8761). The Belden cable has two signal wires (black and clear), one drain wire and a foil shield. The drain wire and foil shield must be grounded at one end of the cable. Do not earth ground the drain wire and foil shield at both

ends of the cable.

fects of environmental noise

Foil Shield

Insulation

Clear Wire

Black Wire

Drain Wire

2–21

MicroLogix 1000 Programmable Controllers User Manual

Preface

Wiring Your Analog Channels

Analog input circuits can monitor current and voltage signals and convert them to serial digital data. The analog output can support either a voltage or a current function.

Sensor 3

(I) Current

Sensor 4

(I) Current

Sensor 1

(V) V

oltage

Sensor 2

(V) Voltage

Jumper unused inputs.

I/10 I/11

VAC

O/4 O/5 O/6

VDC

IA SHD

IA/0 V (+)

IA/1 V (+)

O/7

IA (–)

NOT USED

You can configure either voltage or current output operation.

IA SHD

OA SHD

IA/2 I (+)

OA/0 V (+)

– OR –

IA/3 I

(+)

OA/0 I (+)

IA (–)

OA (–)

meter

For increased noise immunity, connect a ground wire directly from the shield terminals to chassis ground.

Important: The controller does not provide loop power for analog inputs.

2-Wire Transmitter

Use a power supply that matches the transmitter specifications.

Transmitter

+–

+Power

Supply

–

Transmitter

3-Wire Transmitter

Power Supply

–

Supply Signal

GND

IA/0 – 3 (+)

IA (–)

Controller

IA/0 – 3 (+) IA (–)

Controller

2–22

4-Wire Transmitter

Power Supply

–

Transmitter

Supply Signal

+–+

–

Controller IA/0 – 3 (+) IA (–)

Wiring Your Controller

Analog Voltage and Current Input and Output Ranges

Analog Voltage Input Range

–24V dc

Underrange

–10.5V dc 10.5V dc

Analog Current Input Range

–50 mA 50 mA

Underrange

Note The

without damage to the contr withstand the application of 50 mA without damage.

–21 mA 21 mA

analog voltage inputs ar

Analog Voltage Output Range

0V dc 10V dc

Operating

Analog Current Output Range

Range

e pr

otected to

Overrange

Operating

Range

Operating

Range

e pr

otected to withstand the application of 24V dc

oller

. The analog curr

ent inputs ar

24V dc

4 mA

Note The

curr

For information on analog signal and data word values using the nominal transfer function formula, see page 5–5.

20 mA

Operating

Range

analog outputs ar

e pr

otected to withstand the short cir

ent outputs without damage to the contr

cuiting of the voltage or

oller.

2–23

MicroLogix 1000 Programmable Controllers User Manual

Preface

Wiring Your Controller for High-Speed Counter Applications

To wire the controller for high-speed counter applications use input terminals I/0, I/1, I/2, and I/3. Refer to chapter 12 for information on using the high-speed counter.

Shielded cable is required for high-speed input signals 0–3 when the filter setting is set to either 0.10 ms or 0.075 ms. We recommend Belden #9503 or equivalent for lengths up to 305 m (1000 ft). Shields should be grounded only at the signal source end of the cable. Ground the shield to the case of the signal source, so ener coupled to the shield will not be delivered to signal source’

s electronics.

Hardware

2–24

Connecting the System

This chapter describes how to wire your controller system. The method you use and cabling required to connect your controller depends on what type of system you are employing. This chapter also describes how the controller establishes communication with the appropriate network.

For information on: See page:

DF1 protocol connections 3–2 DH-485 network connections 3–5 Establishing communication 3–17

Hardware

3–1

MicroLogix 1000 Programmable Controllers User Manual

Preface

Connecting the DF1 Protocol

There are two ways to connect the MicroLogix 1000 programmable controller to your personal computer using the DF1 protocol: using an isolated point-to-point connection, or using a modem. Descriptions of these methods follow.

Chassis gr

ound, user 24V ground, and RS-232 ground are internally connected. You must connect the chassis ground terminal scr ground prior to connecting any devices. It is important that you understand

s gr

your personal computer’

ounding system before connecting to the controller. An optical isolator is recommended between the controller and your personal computer.

Making an Isolated Point-to-Point Connection

You can connect the MicroLogix 1000 programmable controller to your personal computer using a serial cable from your personal computer’s serial port to the micro controller.

Optical Isolator

(recommended)

Personal Computer

➀ We

recommend using an AIC+, catalog number 1761-NET

specific AIC+ cabling information.

➀

1761-CBL-PM02

Micro Controller

-AIC, as your optical isolator

ew to chassis

. See page 3–1

1 for

3–2

1761-CBL-PM02 Series B Cable

Connecting the System

9 8 7 6

9-pin D-shell

Programming Device

9-Pin

9 8 7 6 5 4 3 2 1

5 4

3 2 1

8-pin Mini Din

678

Hardware

RI CTS RTS DSR GND DTR TXD RXD DCD

24V GND RTS RXD DCD CTS TXD GND

Controller

8-Pin

1 2 3 4 5 6 7 8

20187

Using a Modem

You

can also use modems to connect a personal computer to one MicroLogix 1000 controller (using DF1 full-duplex protocol) or to multiple controllers (using DF1 half-duplex protocol), as shown in the illustration that follows. Do not attempt to use DH-485 protocol through modems under any circumstance. (For information on types of modems you can use with the micro controllers, see page D–9.)

3–3

MicroLogix 1000 Programmable Controllers User Manual

Preface

Modem Cable

Personal

Computer

DF1

full-duplex protocol (to 1 controller)

Modem

DF1 half-duplex master protocol (to multiple controllers)

Optical Isolator

(recommended)

➀

Micro Controller

Programming Device

Modem Cable

Modem

➀ We

recommend using an AIC+, catalog number 1761-NET

Null Modem

specific AIC+ cabling information.

Constructing Your Own Null Modem Cable

If you construct your own null modem cable, the maximum cable length is 15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical pinout:

Optical Isolator

9-Pin

TXD

RXD

GND

DTR

DSR

CTS

8 7

RTS

Modem

Optical Isolator

Modem

1761-CBL-PM02

1761-CBL-PM02 Cable

➀

9-pin 8-pin Mini Din

-AIC, as your optical isolator

Modem

25-Pin

9-Pin

TXD RXD GND CD DTR DSR CTS RTS

2 3 7 8 20 6 5 4

DF1 full-duplex protocol or DF1 half-duplex slave protocol

Controller

. See page 3–1

3 2 5 1 4 6 8 7

1 for

3–4

Connecting to a DH-485 Network

Connecting the System

Note Only

1000 analog contr

MicroLogix

discrete or MicroLogix 1000 analog)

1761-CBL-AM00

1761-CBL-

AIC+

(1761-NET-AIC)

MicroLogix







24V dc (user supply needed if not connected to a MicroLogix 1000 controller)

DH-485 Network



DB-9



mini-DIN 8 RS-232 port



DH-485 port

Series C or later Micr

ollers support DH-485 network connections.

1000 (Series C or later

connection

from port 1 or port 2 to MicroLogix

HM02

1761-CBL-AP00 or 1761-CBL-PM02

RS-232 port

oLogix 1000 discr

AIC+

(1761-NET-AIC)



ete contr

APS

1761-CBL-AP00

1761-CBL-PM02



24V dc (user supplied)

ollers and all Micr

to port 1

or port 2

1747-CP3

1761-CBL-AC00

oLogix

Hardware

Recommended Tools

To connect a DH-485 network, you need tools to strip the shielded cable and to attach the cable and terminators to the AIC+ Advanced Interface Converter recommend the following equipment (or equivalent):

Shielded Twisted Pair Cable #3106A or #9842 Belden Stripping Tool 45-164 Ideal Industries 1/8 ” Slotted Screwdriver Not Applicable Not Applicable

Description Part Number Manufacturer

. W

3–5

MicroLogix 1000 Programmable Controllers User Manual

Preface

DH-485 Communication Cable

The suggested DH-485 communication cable is either Belden #3106A or #9842. The cable is jacketed and shielded with one or two twisted wire pairs and a drain wire.

One pair provides a balanced signal line, and one additional wire is used for a common reference line between all nodes on the network. The shield reduces the effect of electrostatic noise from the industrial environment on network communication.

The communication cable consists of a number of cable segments daisy-chained together. The total length of the cable segments cannot exceed 1219 m (4000 ft).

When cutting cable segments, make them long enough to route them from one AIC+ to the next with sufficient slack to prevent strain on the connector. Allow enough extra cable to prevent chafing and kinking in the cable.

Use these instructions for wiring the Belden #3106A or #9842 cable. (If you are using standard Allen-Bradley cables, see the Cable Selection Guide on page 3–12.)

3–6

Connecting the System

Connecting the Communication Cable to the DH-485 Connector

Note A

daisy-chained network is r

Single Cable Connection

Shrink Tubing Recommended

Belden #3106A or #9842

Connector

Incorrect

Orange with White Stripes

White with Orange Stripes

Blue (#3106A) or Blue with White Stripes (#9842)

ecommended. W

Belden #3106A

#9842

Connector

Drain Wire

e do

not recommend the following:

Belden #3106A or #9842

6 Termination 5A

Common

3 2 Shield

Chassis Ground

Hardware

Multiple Cable Connection

to Successive Device

to Previous Device

3–7

MicroLogix 1000 Programmable Controllers User Manual

Preface

The

table below shows connections for Belden #3106A.

For

this W

ire/Pair

Shield/Drain Non-jacketed T Blue Blue T

White/Orange

The

table below shows connections for Belden #9842.

For

this W

ire/Pair

Shield/Drain Non-jacketed T

Blue/White

White/Orange

➀

o prevent confusion when installing the communication cable, cut back the white with blue stripe wire

immediately after the the insulation jacket is removed. This wire is not used by DH-485.

Connect this W

White with Orange Stripe Orange with White Stripe

Connect this W

White with Blue Stripe Blue with White Stripe White with Orange Stripe

Orange with White Stripe

ire To this Terminal

erminal 2 – Shield erminal 3 – (Common)

erminal 4 – (Data B)

erminal 5 – (Data A)

ire To this Terminal

erminal 2 – Shield

Cut back – no connection T

erminal 3 – (Common)

erminal 4 – (Data B)

erminal 5 – (Data A)

➀

Grounding and Terminating the DH-485 Network

Only one connector at the end of the link must have Terminals 1 and 2 jumpered together. This provides an earth ground connection for the shield of the communication cable.

Both ends of the network must have Terminals 5 and 6 jumpered together. This connects the termination impedance (of 120Ω required by the DH-485 specification.

End-of-Line Termination

3–8

Jumper

Belden

#3106A or #9842 Cable

1219 m (4000 ft) Maximum

Jumper

) that is built into each AIC+ as

Connecting the AIC+

Connecting the System

Note Only

1000 analog contr

You can connect an unpowered AIC+, catalog number 1761-NET-AIC, to the network without disrupting network activity. In addition, if a MicroLogix 1000 controller powers an AIC+ that is connected to the network, network activity will not be disrupted should the MicroLogix 1000 controller be removed from the AIC+.

The figure that follows shows the external wiring connections and specifications of the AIC+.

Series C or later Micr

ollers support DH-485 connections with the AIC+.

AIC+ Advanced Interface Converter

oLogix 1000 discr

(1761-NET-AIC)

ete contr

ollers and all Micr

oLogix

Hardware

Item Description

Port











1 – DB-9 RS-232, DTE Port 2 – mini-DIN 8 RS-232 Port 3 – DH-485 Phoenix plug DC Power Source selector switch

(cable = port 2 power source, external = external power source connected to item 5) T

erminals for external 24V dc power supply and chassis ground

For additional information on connecting the AIC+, see the Advanced Interface Converter (AIC+) and DeviceNet Interface (DNI) Installation Instructions,

Publication 1761-5.11.

3–9

MicroLogix 1000 Programmable Controllers User Manual

Preface

DF1 Isolated Point-to-Point Connection

AIC+

(1761-NET-AIC)

1761-CBL-AM00 1761-CBL-HM02







Selection Switch Up

24V

dc (Not needed in this configuration since the MicroLogix 1000 provides power to the AIC+ via port 2.)

DH-485 Network Connection

MicroLogix

1000 (Series C or later discrete and all analog)

connection port 1 or port 2

1761-CBL-AM00

1761-CBL-

AIC+

(1761-NET-AIC)



HM02





24V dc (user supply needed if not connected to a MicroLogix 1000 controller)

MicroLogix

DH-485 Network

to MicroLogix

MicroLogix 1000

from

1761-CBL-AP00 or 1761-CBL-PM02

(1761-NET-AIC)

1747-CP3 or 1761-CBL-AC00

AIC+



24V dc (user supplied)

APS

1761-CBL-AP00

1761-CBL-PM02



to port 1

or port 2

1761-CBL-AC00

1747-CP3

3–10



DB-9

RS-232 port



mini-DIN 8 RS-232 port



DH-485 port

DF1 Isolated Modem Connection

Connecting the System

Constructing

1761-CBL-AM00 1761-CBL-HM02



AIC+

(1761-NET-AIC)



24V (Not needed in this configuration since the MicroLogix 1000 provides power to the AIC+ via port 2.)

For additional information on connections using the AIC+, see the Advanced Interface Converter (AIC+) and DeviceNet Interface (DNI) Installation Instructions,

Publication 1761-5.11.

our Own Modem Cable

If you construct your own modem cable, the maximum cable length is 15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical pinout:

AIC+

Optical Isolator

9-Pin

3 2 5 1 4 6 8 7



Selection Switch Up

TXD RXD GND CD DTR DSR CTS RTS

MicroLogix 1000

Modem

User supplied modem cable

Modem

25-Pin

TXD RXD GND CD DTR DSR CTS RTS

2 3 7 8 20 6 5 4

9-Pin

3 2 5 1 4 6 8 7

3–11

MicroLogix 1000 Programmable Controllers User Manual

77C

76 C C00 761-C

76 C 00

c77

Preface

Cable Selection Guide

1761-CBL-AC00

1747-CP3

Cable Length Connections from

1747-CP3 1761-CBL-AC00

Cable Length Connections from

1761-CBL-AS03

BL-AS

1761-CBL-AS

1761-CBL-AM00

3m (9.8 ft)

➀

45 cm (17.7 in)

1761-CBL-AS03

3m (9.8 ft)

.5m (31.17 ft)

SLC 5/03 or SLC 5/04 processor PC COM port PanelV

iew 550 through NULL modem adapter DTAM Plus / DT Port 1 on another AIC+

SLC 500 Fixed, SLC 5/01, SLC 5/02, and SLC 5/03 processors

PanelV

AM Micro

iew 550 RJ45 port



1761-CBL-HM02

, channel 0

1761-CBL-AS09

External

to AIC+

port 1 port 1 port 1 port 1 port 1

to AIC+

port 3

➁

Power Supply

Required

yes external yes external yes external yes external yes external

External

Power Supply

Required

yes external

➁

➀

Power Selection Switch Setting

Power Selection

Switch Setting

➁

Hardware

➀

1761-CBL-AM00 1761-CBL-HM02

3–12

Cable Length Connections from

45 cm (17.7 in)

➁

2m (6.5 ft)

➀

MicroLogix 1000 to port 2 on another AIC+

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

➁

Series B or higher cables are required for hardware handshaking.

to AIC+

port 2 port 2

External

Power Supply

Required

no cable yes external

Power Selection

Switch Setting

Connecting the System

76 C 00

c77

1761-CBL-AP00

Cable Length Connections from

1761-CBL-AP00 1761-CBL-PM02

45 cm (17.7 in)

➁

2m (6.5 ft)

SLC 5/03 or SLC 5/04 processors, channel 0 MicroLogix 1000

PanelV

iew 550 through NULL modem adapter DTAM Plus / DT

AM Micro

PC COM port

user

supplied cable

Cable Length Connections from

straight 9–25 pin

––

➀

modem or other communication device

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

➁

Series B or higher cables are required for hardware handshaking.

1761-CBL-PM02

➁

to AIC+

port 2 port 1

port 2 port 2 port 2

to AIC+

port 1

External

Power Supply

Required

yes external

➀

yes yes external yes external yes external

External

Power Supply

Required

➀

yes

Power Selection

Switch Setting

➀

external

Power Selection

Switch Setting

➀

external

3–13

MicroLogix 1000 Programmable Controllers User Manual

Preface

Recommended User-Supplied Components

These components can be purchased from your local electronics supplier.

Component Recommended Model

external power supply and chassis ground

NULL modem adapter straight 9–25 pin RS-232 cable

power supply rated for 20.4–28.8V dc

standard A see table below for port information if making own cables

DH-485







 



Port 2

s DCD signal

➂

TS)

connector Port 3

➀

DB-9 RS-232 Port 1







 





received line signal detector (DCD) same state as port 1’



received data (RxD) received data (RxD)



transmitted data (TxD) transmitted data (TxD)





DTE ready (DTR) signal common (GRD) signal common (GRD)





DCE ready (DSR) request to send (R



clear to send (CTS) clear to send (CTS)



not applicable not applicable not applicable







DB-9 RS-232

➁

TS)

➀

1761-CBL-AP00 or 1761-CBL-PM02

cable straight D connector







 

Port









(1761-CBL-PM02 cable)

DTE ready (DTR)

DCE ready (DSR) request to send (R

➂

An 8-pin mini DIN connector is used for making connections to port 2. This connector is not commercially available. If you are making a cable to connect to port 2, you must configure your cable to connect to the Allen-Bradley cable shown above.

➁

On port 1, pin 4 is electronically jumpered to pin 6. Whenever the AIC+ is powered on, pin 4 will match the state of pin 6.

➂

In the 1761-CBL-PM02 cable, pins 4 and 6 are jumpered together within the DB-9 connector.

Port 3

DH-485 Connector

chassis ground cable shield signal ground DH-485 data B DH-485 data A termination not applicable not applicable

Hardware

3–14

Powering the AIC+

If you use an external power supply, it must be 24V dc. Permanent damage will result if miswired with the wr

Set the DC Power Source selector switch to EXTERNAL before connecting the power supply to the AIC+.

ong power sour

Connecting the System

ce.

Bottom View

24VDC

NEUT

CHS

GND

Always connect the CHS GND (chassis ground) terminal to the nearest earth ground. This connection must be made whether or not an external 24V dc supply is used.

In normal operation with the MicroLogix 1000 programmable controller connected to port 2 of the AIC+, the controller powers the AIC+. Any AIC+ not connected to a controller requires a 24V dc power supply. The AIC+ requires 104 mA at 24V dc.

If both the controller and external power are connected to the AIC+, the power selection switch determines what device powers the AIC+.

3–15

MicroLogix 1000 Programmable Controllers User Manual

Preface

Power Options

Below are two options for powering the AIC+:

• Use the 24V dc user power supply (200 mA maximum) built into the

MicroLogix controller. The AIC+ is powered through a hard-wired connection using a communication cable (1761-CBL-HM02, or equivalent) connected to port 2.

• Use an external DC power supply with the following specifications:

– operating voltage: 24V dc +20% / –15% – output current: 200 mA maximum – rated NEC

Make a hard-wired connection from the external supply to the screw terminals on the bottom of the AIC+.

If you use an external power supply, it must be 24V dc. Permanent damage will result if miswired with the wr

ong power sour

Hardware

ce.

Installing and Attaching the AIC+

1. Take

2. Carefully plug the terminal block into the DH-485 port on the AIC+ you are

3. Provide strain relief for the Belden cable after it is wired to the terminal block.

3–16

care when installing the AIC+ in an enclosure so that the cable connecting the MicroLogix 1000 controller to the AIC+ does not interfere with the enclosure door.

putting on the network. Allow enough cable slack to prevent stress on the plug.

This guards against breakage of the Belden cable wires.

Establishing Communication

When you connect a MicroLogix 1000 controller to a network, it automatically finds which protocol is active (DF1 or DH-485), and establishes communication accordingly. Therefore, no special configuration is required to connect to either network.

However, to shorten the connection time, you can specify which protocol the controller should attempt to establish communication with first. This is done using the Primary Protocol bit, S:0/10. The default setting for this bit is DF1 (0). If the primary protocol bit is set to DF1, the MicroLogix 1000 controller will attempt to connect using the configured DF1 protocol; either full-duplex or half-duplex slave. To have the controller first attempt DH-485 communication, set this bit to 1.

For DH-485 networks that will only contain MicroLogix controllers, at least one controller must have its primary protocol bit set to 1 so that the network can be initialized.

Automatic Protocol Switching

The MicroLogix 1000 Series D or later discrete and all MicroLogix 1000 analog controllers perform automatic protocol switching between DH-485 and the configured DF1 protocol. (The controller cannot automatically switch between DF1 full-duplex and DF1 half-duplex slave.) This feature allows you to switch from active communication on a DF1 half-duplex network to the DH-485 protocol to make program changes.

Connecting the System

Simply disconnect the MicroLogix controller from the DF1 half-duplex network and connect it to your personal computer. The controller recognizes the computer is attempting to communicate using the DH-485 protocol and automatically switches to it. When your program changes are complete, you can disconnect your computer, reconnect the modem, and the controller automatically switches back to the configured DF1 protocol. For example, if you are using the DH-485 protocol to make program changes and you connect an HHP communication on a DF1 full-duplex network.

The following baud rate limitations affect autoswitching:

, you can switch to active

• If the configured DH-485 baud rate is 19200, the configured DF1 baud rate

must be 4800 or greater.

• If the configured DH-485 baud rate is 9600, the configured DF1 baud rate must

be 2400 or greater.

3–17

MicroLogix 1000 Programmable Controllers User Manual

76 C 00

c77

76 C 00

c77

Preface

DeviceNet Communications

You

can also connect a MicroLogix to a DeviceNet network using the DeviceNet Interface (DNI), catalog number 1761-NET-DNI. For additional information on connecting the DNI, see the Advanced Interface Converter (AIC+) and DeviceNet Interface (DNI) Installation Instructions, Publication 1761-5.11. For information on how to configure and commission a DNI, see the Publication 1761-6.5.

DeviceNet Interface User Manual,

The figure that follows identifies the ports of the DNI.

Use

this write–on area to mark the DeviceNet node Address.

Cable Selection Guide

Cable Length Connections from

1761-CBL-AM00 1761-CBL-HM02

DNI DeviceNet Interface

(1761-NET-DNI)

1761-CBL-AM00

45 cm (17.7 in)

➀

2m (6.5 ft)

NODE

DANGER

GND

V– CAN_L

NET

CAN_H

V+

TX/RX

MOD

DeviceNet (Port 1) (Replacement connector part no. 1761–RPL–

–

RS–232

(

Port 2)

SHIEL D

MicroLogix 1000 (all series) MicroLogix 1000 (all series)

Hardware

0000)

1761-CBL-HM02

to DNI

port 2 port 2

3–18

1761-CBL-AP00

Cable Length Connections from

1761-CBL-APM00 1761-CBL-PM02

➀

Series B cables or higher are required for hardware handshaking.

45 cm (17.7 in)

➀

2m (6.5 ft)

SLC 5/03 or SLC 5/04 processors, channel 0 PC COM port

1761-CBL-PM02

to DNI

port 2 port 2

Programming Overview

This chapter explains how to program the MicroLogix 1000 programmable controller. Read this chapter for basic information about:

• principles of machine control

• understanding file or

•

understanding how processor files are stored and accessed

• applying ladder logic to your schematics

• a model for developing your program

ganization and addressing

Programming

4–1

MicroLogix 1000 Programmable Controllers User Manual

Preface

Principles of Machine Control

The controller consists of a built-in power supply, central processing unit (CPU), inputs, which you wire to input devices (such as pushbuttons, proximity sensors, limit switches), and outputs, which you wire to output devices (such as motor starters, solid-state relays, and indicator lights).

Programming

Device

User Input Devices

Memory

Inputs

MicroLogix 1000 Programmable Controller

(Programs and Data)

CPU

Processor

Power Supply

Outputs

User Output Devices

4–2

Programming Overview

With the logic program entered into the controller, placing the controller in the Run mode initiates an operating cycle. The controller’

s operating cycle consists of a series of operations performed sequentially and repeatedly, unless altered by your program logic.

input

overhead





scan

service

comms



output

scan



input

scan – the time required for the controller to scan and read all input data;

typically accomplished within µseconds.

 program scan – the time required for the processor to execute the instructions in the

program. The program scan time varies depending on the instructions used and each instruction’

Note Subroutine

deviations in the way the operating cycle is sequenced.

 output scan – the time required for the controller to scan and write all output data;

typically accomplished within µseconds.



program

scan

Operating Cycle



s status during the scan time.

and interrupt instructions within your logic pr

Programming

ogram may cause

 service communications – the part of the operating cycle in which communication

takes place with other devices, such as an HHP or personal computer

 housekeeping and overhead – time spent on memory management and updating

timers and internal registers.

You enter a logic program into the controller using a programming device. The logic program is based on your electrical relay print diagrams. It contains instructions that direct control of your application.

4–3

MicroLogix 1000 Programmable Controllers User Manual

Preface

Understanding File Organization

The processor provides control through the use of a program you create, called a processor file. This file contains other files that break your program down into more manageable parts.

Processor File Overview

Most of the operations you perform with the programming device involve the processor file and the two components created with it: program files and data files.

Processor

Program Files

(14

Maximum)

The programming device stores processor files on har

File

Data Files

(8 Maximum)

d disk (or floppy disk)

. Monitoring and editing of processor files is done in the workspace of the computer. After you select a file from disk and edit it, you then save the file hard to disk, replacing the original disk version with the edited version. The hard disk is the recommended location for a processor file.

PROGRAMMING DEVICE

Workspace

Hard Disk

Uniquely named

processor files

4–4

Processor files are created in the offline mode using the programming device. These files are then restored (downloaded), to the processor for online operation.

Program Files

Programming Overview

Program files contain controller information, the main ladder program, interrupt subroutines, and any subroutine programs. These files are:

• System Program (file 0) – This file contains various system related

information and user-programmed information such as processor type, I/O configuration, processor file name, and password.

• Reserved (file 1) – This file is reserved.

• Main Ladder Program (file 2) – This file contains user-programmed

instructions defining how the controller is to operate.

•

User Err

fault occurs.

or Fault Routine (file 3) – This file is executed when a recoverable

• High-Speed Counter Interrupt (file 4) – This file is executed when an HSC

interrupt occurs. It can also be used for a subroutine ladder program.

• Selectable Timed Interrupt (file 5) – This file is executed when an STI occurs.

It can also be used for a subroutine ladder program.

• Subroutine Ladder Program (files 6 – 15) – These are used according to

subroutine instructions residing in the main ladder program file or other subroutine files.

Programming

Data Files

Data files contain the status information associated with external I/O and all other instructions you use in your main and subroutine ladder program files. In addition, these files store information concerning processor operation. Y files to store “recipes” and look-up tables if needed.

These files are organized by the type of data they contain. The data file types are:

ou can also use the

• Output (file 0) – This file stores the state of the output terminals for the

controller.

• Input (file 1) – This file stores the status of the input terminals for the

controller.

• Status (file 2) – This file stores controller operation information. This file is

useful for troubleshooting controller and program operation.

• Bit (file 3) – This file is used for internal relay logic storage.

• Timer (file 4) – This file stores the timer accumulator and preset values and

status bits.

4–5

MicroLogix 1000 Programmable Controllers User Manual

Preface

• Counter (file 5) – This file stores the counter accumulator and preset values

and the status bits.

• Control (file 6) – This file stores the length, pointer position, and status bits for

specific instructions such as shift registers and sequencers.

• Integer (file 7) – This file is used to store numeric values or bit information.

Understanding How Processor Files are Stored and Accessed

The MicroLogix 1000 programmable controller uses two devices for storing processor files: RAM and EEPROM. The RAM provides easy access storage (i.e., its data is lost on a power down), while the EEPROM provides long-term storage (i.e., its data is not lost on a power down). The diagram below shows how the memory is allocated in the micro controller’

s processor

EEPROM

Backup Data

Retentive Data

Program Files

The memory device that is used depends on the operation being performed. This section describes how memory is stored and accessed during the following operations:

RAM CPU Workspace

Retentive Data Program Files

CPU

• download

• normal operation

• power down

• power up

4–6

Download

Programming Overview

When the processor file is downloaded to the micro controller, it is first stored in the volatile RAM. It is then transferred to the non-volatile EEPROM, where it is stored as both backup data and retentive data.

Note If

Normal Operation

EEPROM

Backup Data

Retentive Data

Program Files

RAM CPU Workspace

Retentive Data Program Files

CPU

Programming Device

you want to ensur

e using, save the pr

During normal operation, both the micro controller and your programming device can access the processor files stored in the RAM. Any changes to retentive data that occur due to program execution or programming commands affect only the retentive data in the RAM.

The program files are never modified during normal operation. However, both the CPU and your programming device can read the program files stored in RAM.

e that the backup data is the same for every micro controller you

ogram to disk befor

e downloading it to a micr

o contr

oller.

Programming

EEPROM

Backup Data

Retentive Data

Program Files

RAM CPU Workspace

Retentive Data Program Files

CPU

Programming Device

4–7

MicroLogix 1000 Programmable Controllers User Manual

Preface

Power Down

When a power down occurs, only the retentive data is transferred from the RAM to the EEPROM. (The program files do not need to be saved to the EEPROM since they cannot be modified during normal operation.) If for some reason power is lost before all of the retentive data is saved to the EEPROM, the retentive data is lost. This may occur due to an unexpected reset or a hardware problem.

Power Up

EEPROM

Backup Data

Retentive Data

Program Files

RAM CPU Workspace

Retentive Data Program Files

CPU

Programming Device

During power up, the micro controller transfers the program files from the EEPROM to the RAM. The retentive data is also transferred to the RAM, provided it was not lost on power down, and normal operation begins.

EEPROM

Backup Data

Retentive Data

Program Files

RAM CPU Workspace

Retentive Data Program Files

CPU

Programming Device

4–8

Programming Overview

If retentive data was lost on power down, the backup data from the EEPROM is transferred to the RAM and used as the retentive data. In addition, status file bit S2:5/8 (retentive data lost) is set and a recoverable major error occurs when going to run.

EEPROM

Backup Data

Retentive Data

Program Files

RAM CPU Workspace

Retentive Data Program Files

CPU

Programming Device

Programming

4–9

MicroLogix 1000 Programmable Controllers User Manual

Preface

Addressing Data Files

For the purposes of addressing, each data file type is identified by a letter (identifier) and a file number.

File

Type

Output

Input

Status

Bit

Timer

Counter

Control Integer

The addresses are made up of alphanumeric characters separated by delimiters. Delimiters include the colon, slash, and period.

Specifying Logical Addresses

The format of a logical address, xf:e, corresponds directly to the location in data storage.

Where: Is the:

File type: O—output T—timer

File #: 0—output 4—timer

File delimiter: Colon or semicolon delimiter separates file and structure/word numbers. Element number: 0 to: 0—output 39—timer

Identifier

I S B T

C R N

I—input C—counter S—status R—control B—binary N—integer

1—input 5—counter 2—status 6—control 3—binary 7—integer

1—input 31—counter 32—status 15—control 31—binary 104—integer

File

Number

0 1 2 3 4 5 6 7

4–10

Programming Overview

You

assign logical addresses to instructions from the highest level (element) to the

lowest level (bit). Addressing examples are shown in the table below

To specify the

address of a:

Word within an integer file

Word within a structure file (e.g., a timer file)

Bit within an integer file

Bit within a bit file

Use these parameters:

➀

File Type File Number File Delimiter Word Number

T4:7.

File Type File Number File Delimiter Structure Number Delimiter Word

7N : 2 / 5

File Type File Number File Delimiter Word Number Bit Delimiter Bit Number

File Type File Number Bit Delimiter Bit Number

Bit files are bit stream continuous files, and therefore you can address them in two ways: by word and bit, or by bit alone.

7N:2

ACC

Programming

B3 /31

Bit within a structure file (e.g., a control file)

File Type File Number File Delimiter Structure Number Delimiter Mnemonic

➀

Some

programming devices support short addressing. This allows you to eliminate the file number and file delimiter from addresses. (For example: N7:2=N2, T4:12.ACC=T12.ACC, B3:2/12=B2/12 programming device’s user manual for information on addressing capabilities.

R6:7 /DN

)

Consult

your

4–11

MicroLogix 1000 Programmable Controllers User Manual

Preface

You can also address at the bit level using mnemonics for timer, counter, or control data types. The available mnemonics depend on the type of data. See chapters 6 through 13 for more information.

Specifying Indexed Addresses

The

indexed address symbol is the # character before the file-type identifier in a logical address. Y indexed address in your ladder program.

Enter the offset value in word 24 of the status file (S:24). All indexed instructions use the same word S:24 to store the offset value. The processor starts operation at the base address plus the of logic before each indexed address operation.

When you specify indexed addresses, follow these guidelines:

•

Make sure the index value (positive or negative) does not cause the indexed address to exceed the file type boundary.

•

When an instruction uses more than two indexed addresses, the processor uses the same index value for each indexed address.

• Set the index word to the offset value you want immediately before enabling an

instruction that uses an indexed address.

. Place the # character immediately

ou can use more than one

fset. Y

ou can manipulate the offset value in your ladder

Instructions with a # sign in an address manipulate the offset value stored at S:24. Make sure you monitor or load the offset value you want prior to using an indexed addr with possible damage to equipment and/or injury to personnel.

Example of Indexed Addressing

The

following Masked Move (MVM) example uses an indexed address in the source and destination addresses. If the of processor manipulates the data stored at the base address plus the of

4–12

ess. Otherwise unpr

MVM

MASKED MOVE Source #N7:10

Mask 0033

Dest #N7:50

edictable machine operation could occur

fset value is 10 (stored in S:24), the

fset.

this example, the processor uses the following addresses:

Value: Base Address: Offset Value in S:24 Offset Address:

Source N7:10 10 N7:20 Destination N7:50 10 N7:60

Addressing File Instructions – Using the File Indicator (#)

The

file instructions below manipulate data table files. These files are addressed with the # sign. They store an offset value in word S:24 (index register), just as with indexed addressing discussed in the last section.

(LIFO Load)

Copy File

COP

Fill File

FLL

Bit Shift Left

BSL

Bit Shift Right

BSR

(FIFO Load)

FFL

(FIFO Unload)

FFU

If you are using file instructions and also indexed addr you monitor and/or load the correct offset value prior to using an indexed addr

ess. Otherwise, unpr

edictable operation could occur

personal injury and/or damage to equipment.

LFL

(LIFO Unload)

LFU

Sequencer Output

SQO

Sequencer Compare

SQC

Sequencer Load

SQL

Programming Overview

essing, make sur

, r

esulting in possible

Programming

e that

Numeric Constants

You can enter numeric constants directly into many of the instructions you program. The range of values for most instructions is –32,768 through +32,767. These values can be displayed or entered in several radixes. The radixes that can be displayed are:

• Integer

• Binary

• ASCII

• Hexadecimal

4–13

MicroLogix 1000 Programmable Controllers User Manual

Preface

When

entering values into an instruction or data table element, you can specify the radix of your entry using the “&” special operator enter data into an instruction or data table element are:

. The radixes that can be used to

• Integer (&N)

• Binary (&B)

• ASCII (&A)

• Hexadecimal (&H)

• BCD (&D)

• Octal (&O)

Numeric constants are used in place of data file elements. They cannot be manipulated by the user program. You must enter the offline program editor to change the value of a constant.

Applying Ladder Logics to Your Schematics

The logic you enter into the micro controller makes up a ladder program. A ladder program consists of a set of instructions used to control a machine or a process.

4–14

Ladder logic is a graphical programming language based on electrical relay diagrams. Instead of having electrical rung continuity, ladder logic is looking for logical rung continuity. A ladder diagram identifies each of the elements in an electromechanical circuit and represents them graphically how your control circuit operates before you actually start the physical operation of your system.

] [

input instructions output instruction

In a ladder diagram each of the input devices are represented in series or parallel combinations across the rung of the ladder. The last element on the rung is the output that receives the action as a result of the conditional state of the inputs on the rung.

Each output instruction is executed by the controller when the rung is scanned and the conditions on the rung are true. When the rung is not scanned or the logic conditions on the rung do not create a true logic path, the output is not executed.

]/[

. This allows you to see

( )

Programming Overview

The programming device allows you to enter a ladder logic program into the micro controller.

In the following illustration, the electromechanical circuit shows PB1 and PB2, two pushbuttons, wired in series with an alarm horn. PB1 is a normally open pushbutton, and PB2 is normally closed. This same circuit is shown in ladder logic by two contacts wired in series with an output. Contact I/0 and I/1 are examine-if-closed instructions.➀ (For more information on this instruction, refer to page 6–4.)

Electromechanical Circuit

PB1 PB2

➀

Contact

I1 would be an examine-if-open instruction ( ]/[ ) if PB2 was a normally open electromechanical circuit.

The

table below shows how these circuits operate. The table shows all possible

Alarm

Horn

Ladder Logic Program

] [] [

conditions for the electromechanical circuit, the equivalent state of the ladder logic instructions, and the resulting output state.

If PB1 is: I/0 state is: And PB2 is: I/1 state is: Then the Alarm Horn (O/1) is:

not pushed 0 not pushed 1 silent not pushed 0 pushed 0 silent pushed 1 not pushed 1 alarm pushed 1 pushed 0 silent

Developing Your Logic Program – A Model

( )

Programming

The following diagram can help you develop your application program. Each process block represents one phase of program development. Use the checklist at the right of the process block to help you identify the tasks involved with each process.

4–15

MicroLogix 1000 Programmable Controllers User Manual

Preface

Program

Development

Process

Design

Functional Specification

Detailed Analysis

Determine if Special

Features are Needed

Perform

Programming

Create Logic

Program

Confirm I/O

Addresses

Enter/Edit

Program

Program Development

Checklist

❏

Prepare a general description of how you want your automated process to operate.

❏

Identify the hardware requirements.

❏

Match inputs and outputs with actions of the process.

❏

Add these actions to the functional specifications. Do you need:

❏

Special interrupt routines?

❏

High-speed counting features?

❏

Sequencing Operations?

❏

FIFO or LIFO stack operations?

❏

Use worksheets if necessary to create program.

❏

Make sure I/O addresses match correct input and output devices.

❏

Enter program using the programming device.

4–16

Check for

Completeness

Monitor/Troubleshoot

Program

Run program.

❏

Review your functional specification and detailed analysis for missing or incomplete information.

❏

Monitor and, if necessary program that you entered.

❏

Resulting programs should match functional specifications.

, troubleshoot the

Using Analog

This chapter describes the operation of the MicroLogix 1000 analog controllers. T

opics include:

• I/O Image

• I/O Configuration

• Input Filter and Update Times

• Converting Analog Data

5–1

Programming

MicroLogix 1000 Programmable Controllers User Manual

Preface

I/O Image

The input and output image files of the MicroLogix 1000 analog controllers have the following format:

Address Input Image Output Image Address

I:0.0 Discrete Input Word 0 Discrete Output Word 0 O:0.0 I:0.1 Discrete Input Word 1 Reserved O:0.1 I:0.2 Reserved Reserved O:0.2 I:0.3 Reserved Reserved O:0.3

I:0.4 Analog Input 0 (Voltage) I:0.5 Analog Input 1 (Voltage)

I:0.6 Analog Input 2 (Current) I:0.7 Analog Input 3 (Current)

Input

words 0 and 1 contain discrete input data. Unused inputs in the discrete inputs

Analog Output 0 (Voltage or Current)

O:0.4

image space are reset during each input scan. Input words 2 and 3 are reserved and are not updated by the controller. These inputs have no direct effect on controller operation, but they can be modified like other data bits.

Input words 4–7 contain the status of the four analog input channels respectively. Analog input image words are cleared at Going To Run (GTR). For enabled channels, the analog input image is updated on a cyclical basis.

Output word 0 contains discrete output data. Output words 1–3 are reserved output image space. Unused outputs in both the discrete output image space and the reserved output image space have no direct effect on controller operation. But these outputs can be modified like other data bits. Output word 4 holds the value of the analog output channel.

5–2

I/O Configuration

The analog input channels are single-ended (unipolar) circuits and can be individually enabled or disabled. The default is all input channels enabled. The two voltage inputs accept

The analog output channel is also a single-ended circuit. You can configure either voltage (0V dc to +10V dc) or current (+4 to +20 mA) output operation. The default is voltage output.

Using Analog

"10.5V dc, and the two current inputs accept "21 mA.

The output must be configured for either voltage or current, not both determined by the output configuration. When in the Run mode and the output is configured for voltage, the voltage output terminal is active and the current output terminal is inactive. Similarly, when in the Run mode and the output is configured for current, the current output terminal is active and the voltage output terminal is inactive. When the system is not in Run mode, both the voltage and current outputs are inactive.

Input Filter and Update Times

The MicroLogix analog input filter is programmable. The slower the filter setting, the more immune the analog inputs are to electrical noise. The more immune the analog inputs are to electrical noise, the slower the inputs will be to update. Similarly, the faster the filter setting, the less immune the analog inputs are to electrical noise. The less immune the analog inputs are to electrical noise, the faster the inputs will be to update.

Programmable Filter Characteristics

1st Notch Freq

(Hz)

10 2.62 100.00 400.00 16 50 13.10 20.00 80.00 16

➀

60 250 65.50 4.00 16.00 15

➀

Hz is the default setting.

Filter

Bandwidth

(-3 dB Freq Hz)

15.72 16.67 66.67 16

Update Time

(mSec)

Settling Time

(mSec)

. This is

Resolution

(Bits)

5–3

MicroLogix 1000 Programmable Controllers User Manual

Preface

The total update time for each channel is a combination of the Update Time and the Settling Time. When more than one analog input channel is enabled, the maximum update for each channel is equal to one ladder scan time plus the channel’ Time plus Settling T

ime. When only one analog input channel is enabled, the maximum update for the channel is equal to the Update T time.

Update Examples

Example 1 – All (4) channels enabled with 60 Hz filter selected (default settings).

Maximum Update Time = (4) x ladder scan time

(Each channel will be updated approximately three times per second.)

Example 2 – 1 channel enabled with 250 Hz filter selected.

s Update

ime plus one ladder scan

+ (4) x 16.67 ms + (4) x 66.67 ms = 333.36 ms + (4) x ladder scan times

Maximum Update Time = ladder scan time + 4 ms

Input Channel Filtering

The analog input channels incorporate on-board signal conditioning. The purpose of this conditioning is to reject the AC power line noise that can couple into an analog input signal while passing the normal variations of the input signal.

Frequency components of the input signal at the filter frequency are rejected. Frequency components below the filter bandwidth (–3 dB frequency) are passed with under 3 dB of attenuation. This pass band allows the normal variation of sensor inputs such as temperature, pressure and flow transducers to be input data to the processor

Noise signals coupled in at frequencies above the pass band are sharply rejected. An area of particular concern is the 50/60 Hz region, where pick-up from power lines can occur

5–4

Converting Analog Data

The analog input circuits are able to monitor current and voltage signals and convert them to digital data. There are six terminals assigned to the input channels that provide two voltage inputs, two current inputs and two return signals (commons).

Using Analog

The analog outputs can support either a current

voltage function. There are three terminals assigned to the output channels that provide one voltage output, one current output and a common (shared) terminal.

The following table shows sample Analog Signal and Data W

ord values using the

nominal transfer function formula:

N=Iin x 32767/21 where Iin (analog signal) is in milliamperes (mA)

x 32767/10.5 where Vin (analog signal) is in volts (V)

N=V

N=(I

– 4 mA) x 32767/16 mA where I

out

(analog signal) is in

out

milliamperes (mA) N=V

Analog Signal Data Word

0V 0 0 5V 15603 16384 10V 31207 32767 4

1 mA

20 mA

x 32767/10V where V

out

6241 0 17164 14336 31207 32767

Input Output

(analog signal) is in volts (V)

out

Converting Analog Input Data

Analog inputs convert current and voltage signals into 16-bit two’ binary values. To determine an approximate voltage that an input value represents,

use one of the equations shown on the following page.

s complement

5–5

MicroLogix 1000 Programmable Controllers User Manual

767

Preface

10.5V

32,767

➀

The Input Value is the decimal value of the word in the

input image for the corresponding analog input.

For example, if an input value of 16,021 is in the input image, the calculated value is:

10.5V

32,767

It should be noted that the actual value may vary within the accuracy limitations of the module.

 16,201 = 5.1915(V)

 input value➀ = input voltage(V)

To determine an approximate current that an input value represents, you can use the following equation:

1 mA

32,767

➁

The Input Value is the decimal value of the word in the

input image for the corresponding analog input. For example, if an input value of 4096 is in the input image,

the calculated value is:

21 mA

 4096 = 2.625 (mA)

32,767

It should be noted that the actual value may vary within the accuracy limitations of the module.

 input value➁ = input current (mA)

Converting Analog Output Data

Use the following equation to determine the decimal value for the current output:

5–6

32,767 16 mA

For example, if an output value of 8 mA is desired, the value to be put in the corresponding word in the output image can be calculated as follows:

32,767 16 mA

Use the following equation to determine the decimal value for the voltage output:

32, 10V dc

For example, if an output value of 1V dc is desired, the value to be put in the corresponding word in the output image can be calculated as follows:

32,767

10V dc

 [Desired Current Output (mA) – 4 mA] = Output Decimal Value

 (8 mA – 4 mA) = 8192

 Desired Voltage Output (V dc) = Output Decimal Value

 1V dc = 3277

Using Basic Instructions

Purpose

Page

Bit Instructions

Using Basic Instructions

This chapter contains general information about the basic instructions and explains how they function in your application program. Each of the basic instructions includes information on:

• what the instruction symbol looks like

• typical execution time for the instruction

• how to use the instruction

In addition, the last section contains an application example for a paper drilling machine that shows the basic instructions in use.

Instruction

Mnemonic Name

XIC XIO Examine if Open Examines a bit for an Off condition. 6–4

Examine if Closed Examines a bit for an On condition. 6–4

Programming

OTE Output Energize Turns a bit On or Off. 6–5 OTL and

OTU

OSR One-Shot Rising Triggers a one time event. 6–7

Output Latch and Output Unlatch

OTL turns a bit on when the rung is executed, and this bit retains its state when the rung is not executed or a power cycle occurs. OTU turns a bit off when the rung is executed, and this bit retains its state when the rung is not executed or when power cycle occurs.

6–5

6–1

MicroLogix 1000 Programmable Controllers User Manual

Purpose

Page

Preface

Timer/Counter Instructions

Instruction

Mnemonic Name

TON Timer On-Delay Counts timebase intervals when the instruction is

TOF Timer Off-Delay Counts timebase intervals when the instruction is

RTO Retentive Timer Counts timebase intervals when the instruction is

CTU Count Up Increments the accumulated value at each false-to-

CTD Count Down Decrements the accumulate value at each false-to-

RES Reset Resets the accumulated value and status bits of a

About the Basic Instructions

These instructions, when used in ladder programs represent hardwired logic circuits used for the control of a machine or equipment.

true.

6–11

6–12

false.

6–14

true and retains the accumulated value when the instruction goes false or when power cycle occurs.

6–18

true transition and retains the accumulated value when the instruction goes false or when power cycle occurs.

6–19

true transition and retains the accumulated value when the instruction goes false or when power cycle occurs.

6–20

timer or counter. Do not use with TOF timers.

The basic instructions are separated into three groups: bit, timer, and counter. Before you learn about the instructions in each of these groups, we suggest that you read the overview that precedes the group:

• Bit Instructions Overview

• Timer Instructions Overview

• Counter Instructions Overview

6–2

Rockwell Automation 1761 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Table of Contents

Summary of Changes

New Information

Updated Information

Preface

Who Should Use this Manual

Purpose of this Manual

Common Techniques Used in this Manual

Allen-Bradley Support

Compliance to European Union Directives

Hardware Overview

Master Control Relay

Using Surge Suppressors

Safety Considerations

Power Considerations

Preventing Excessive Heat

Controller Spacing

Mounting the Controller

Grounding Guidelines

Sinking and Sourcing Circuits

Wiring Recommendations

Wiring Diagrams, Discrete Input and Output Voltage Ranges

Minimizing Electrical Noise on Analog Controllers

Grounding Your Analog Cable

Analog Voltage and Current Input and Output Ranges

Wiring Your Controller for High-Speed Counter Applications

Connecting the DF1 Protocol

Connecting to a DH-485 Network

Connecting the AIC+

Establishing Communication

DeviceNet Communications

Principles of Machine Control

Understanding File Organization

Understanding How Processor Files are Stored and Accessed

Addressing Data Files

Applying Ladder Logics to Your Schematics

I/O Image

I/O Configuration

Input Filter and Update Times

Converting Analog Data

About the Basic Instructions