Copyright © 2002 Delmar Thomson Learning Chapter 17 Sequencer Instructions.

Chapter 17

Sequencer Instructions

Objectives

Describe the function of a sequencer.

Describe the operation of the SLC 500 sequencer output (SQO) instruction.

Explain the function of each SQO status bit.

Objectives (cont’d.)

Explain the role of the control (R6) file.Explain the role of the bit file while

programming a sequencer instruction.Explain what a mask is and why it is

used.Determine the appropriate hexadecimal

mask for your application.

Sequencer Instructions

Sequencer Output Instruction (SQO)

SQO is an output instruction.Each false to true transition causes

the SQO instruction to increment to the next sequence step.

Sequencer steps are stored in a reference data file.

SLC 500 PLC Sequencer Output

Instruction

Bit File Containing Sequencer Step Data

Sequencer Operation

Sequencer Reference File #B3:0

SQO Control File

Sequencer instructions do not have designated data files like timers or counters.

Use R6 control file.Control file will store sequencer

status bits, length, and position data.

Three-Word Control Element for the SQO

SQO and Associated Status Bits

SQO and Hexadecimal Masking

Sequencers use hexadecimal masks similar to the MVM instruction to filter data from the sequencer reference file to the output destination.

Only Bits 0 through 7 Will Be Allowed to Pass through the

Only Bits Set to a 1 Will Allow Data to Pass

Bit Pattern Translated to Hexadecimal

Only Bits 8 through 11 Will Be Allowed to Pass through the

Selected Single Mask Bits Set to a 1

Bit Pattern Translated to Hexadecimal

Binary Bit Pattern and Hex Correlations

Copyright © 2002 Delmar Thomson Learning Chapter 17 Sequencer Instructions.

Documents

Transcript of Copyright © 2002 Delmar Thomson Learning Chapter 17 Sequencer Instructions.

California © 2007 Thomson Delmar Learning. All Rights Reserved. Chapter 10.

Copyright 2002, Delmar, A division of Thomson Learning Chapter 23 Pregnant Patient.

Copyright 2005 Thomson Delmar Learning. Thomson and Delmar Learning are trademarks used herein under license. PRENATAL CARE CHAPTER 50.

The Legal Team, Law Practices, and Law Firm Governance Practical Law Office Management, 3 rd Edition, Thomson Delmar Learning ©2007 Thomson Delmar Learning.

Copyright 2002, Delmar, A division of Thomson Learning Chapter 7 Nutritional Assessment.

Unit 6: Legal Fees, Timekeeping, and Billing Chapter 5 Practical Law Office Management, 3 rd Edition, Thomson Delmar Learning ©2007 Thomson Delmar Learning.

Germany © 2007 Thomson Delmar Learning. All Rights Reserved. Chapter 8.

© 2006 Thomson Delmar Learning. All Right Reserved. CHAPTER 9 CHILD CUSTODY.

Copyright 2002, Delmar, A division of Thomson Learning Chapter 12 Eyes.

Copyright © 2002 Delmar Thomson Learning Chapter 6 Introduction to Logic.

Copyright 2002, Delmar, A division of Thomson Learning Chapter 4 Developmental Assessment.

© 2006 Thomson Delmar Learning. All Right Reserved. CHAPTER 10 CHILD SUPPORT.

Copyright 2002, Delmar, A division of Thomson Learning Chapter 21 Male Genitalia.

Copyright © 2002 Delmar Thomson Learning Chapter 4 Number Systems.

Copyright © 2008 Thomson Delmar Learning CHAPTER 8 Ventilation-Perfusion Relationships.

Meat © 2007 Thomson Delmar Learning. All Rights Reserved. Chapter 9.

FIRE BEHAVIOR Copyright© 2000. Delmar is a division of Thomson Learning.

Copyright 2002, Delmar, A division of Thomson Learning.

CHAPTER 8 Copyright © 2007 Thomson Delmar Learning 8.1 Portable Fire Extinguishers.

South Africa © 2007 Thomson Delmar Learning. All Rights Reserved. Chapter 15.