Ingenieria

SLC 500™
Instruction Set
Catalog Numbers 1747-L20x,
1747-L30x, 1747-L40x, 1747-L511,
1747-L514, 1747-L524, 1747-L531,
1747-L532, 1747-L541, 1747-L542,
1747-L543, 1747-L551, 1747-L552,
1747-L553

Reference 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
controlequipment 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 andrequirements associated with any particular
installation, Allen-Bradley does not assume responsibility or liability
(to include intellectual property liability) for actual use based upon
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-Bradleyoffice), describes some
important differences between solid-state 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 part, without written permission of Rockwell Automation, is
prohibited.
Throughout this manual we use notes tomake you aware of safety
considerations:

ATTENTION

!

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 a hazard
• recognize the consequences
IMPORTANT

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

PLC-2, PLC-3, and PLC-5 are registered trademarks of Rockwell Automation.
SLC 500, SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04, SLC 5/05 and Data Highway Plus are trademarks of Rockwell Automation.
WINtelligent EMULATE 500, WINtelligent LINX, RSLogix 500, RSLinx, and RSTune are trademarks of Rockwell Software, Inc.
Ethernet is a registered trademark of Digital EquipmentCorporation, Intel, and Xerox Corporation.
MS-DOS and Windows 95 are registered trademarks and Windows NT is a trademark of Microsoft Corporation.
NEC Versa is a trademark of Nippon Electric Company Information Systems, Inc.
Gateway 2000 is a trademark of Gatemway 2000, Inc.

Summary of Changes
The information below summarizes the changes to this manual since
the last printing.
To help you findnew and updated information in this release of the
manual, we have included change bars as shown next to this
paragraph.
The table below lists the sections that document new features and
additional or updated information about existing features.

For this information

See

Removed references to MicroLogix 1000.

Throughout

Created section explaining Data Files and Program FilesChapter 1

Removed Processor Files information. Revisions to the Basic Instructions.

Chapter 2

Revisions to the Comparison Instructions.

Chapter 3

Revisions to the Math Instructions. Added Ramp Instruction (RMP).

Chapter 4

Revisions to the Data Handling Instructins. Added Encode 1 to 16 to 4 Instruction (ENC).

Chapter 5

Revisions to the Program Flow InstructionsChapter 6

Revisions to the Application Specific Instructions. Added the following instructions: Read High-Speed Clock
Instruction (RHC), Compute Time Difference Instruction (TDF), File Bit Comparison Instruction (FBC) and Diagnostic
Detect (DDT).

Chapter 7

Added Remote I/O Block Transfer Instructions (BTR and BTW).

Chapter 8

Revisions to the PID Instruction.

Chapter 9

Revisions...