Allen-Bradley ProcessLogix 1757 Series User manual

ProcessLogix

Function Blocks

1757 Series

Reference Manual

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Important User Information

Because of the variety of uses for the products described in this

publication, those responsible for the application and use of these

products 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. In no event will Allen-Bradley be responsible

or liable for indirect or consequential damage resulting from the use

or application of these products.

Any illustrations, charts, sample programs, and layout examples

shown in this publication 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 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-Bradley office), 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 publication, notes may be used to make you aware

of safety considerations. The following annotations and their

accompanying statements help you to identify a potential hazard,

avoid a potential hazard, and recognize the consequences of a

potential hazard:

Allen-Bradley is a trademark of Rockwell Automation

WARNING

Identifies information about practices or

circumstances that can cause an explosion in a

hazardous environment, which may lead to personal

injury or death, property damage, or economic loss.

ATTENTION

Identifies information about practices or

circumstances that can lead to personal injury or

death, property damage, or economic loss.

IMPORTANT Identifies information that is critical for successful

application and understanding of the product.

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Rockwell Automation

Support

Rockwell Automation 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

Rockwell Automation representatives in every major country in the

world.

Local Product Support

Contact your local Rockwell Automation representative for:

•sales and order support

•product technical training

•warranty support

•support service agreements

Technical Product Assistance

If you need to contact Rockwell Automation for technical assistance,

first call your local Rockwell Automation representative, then:

•Technical Support, 440.646.5800

•Web Links, http://www.ab.com

Your Questions or Comments on this Manual

If you find a problem with this manual, please notify us of it on the

How Are We Doing? form at the back of this manual.

vPublication 1757-RM810A-EN-P - May 2002

Table of Contents

Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . iii

Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . iv

Local Product Support . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Technical Product Assistance . . . . . . . . . . . . . . . . . . . . . iv

Your Questions or Comments on this Manual . . . . . . . . . iv

Chapter 1

Introduction to Control Builder

Components

Component Categories and Types . . . . . . . . . . . . . . . . . . . 1-1

Hardware relation category . . . . . . . . . . . . . . . . . . . . . 1-1

Functional relation category . . . . . . . . . . . . . . . . . . . . . 1-5

Component Libraries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

System (SYSTEM) Library . . . . . . . . . . . . . . . . . . . . . . . 1-7

Auxiliary (AUXILIARY) Library . . . . . . . . . . . . . . . . . . . 1-7

Device Control (DEVCTL) Library . . . . . . . . . . . . . . . . . 1-7

Data Acquisition (DATAACQ) Library . . . . . . . . . . . . . . 1-7

Input/Output Module (IO) Library . . . . . . . . . . . . . . . . 1-8

Input/Output Channel (IOCHANNEL) Library . . . . . . . . 1-9

Logic (LOGIC) Library . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Regulatory Control (REGCTL) library. . . . . . . . . . . . . . . 1-10

Sequential Control Module (SCM) library . . . . . . . . . . . 1-10

Utility (UTILITY) Library. . . . . . . . . . . . . . . . . . . . . . . . 1-10

ControlNet Interoperability (Exchange) Library . . . . . . . 1-11

Pulse Input Channel/Module (PULSEINPUT) Library . . . 1-11

1797 FLEX Ex Modules (RAIL_IO_HAZ) . . . . . . . . . . . . 1-11

Profibus Interface (PBUSIF) Library. . . . . . . . . . . . . . . . 1-11

1794 FLEX I/O Modules (RAIL_IO) . . . . . . . . . . . . . . . . 1-12

Fieldbus Interface (FBUSIF) Library . . . . . . . . . . . . . . . 1-12

Chapter 2

Physical Equipment Blocks

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Control Processor Module (CPM) . . . . . . . . . . . . . . . . . 2-1

Control Execution Environment (CEE) . . . . . . . . . . . . . 2-2

Redundancy Module (RM) . . . . . . . . . . . . . . . . . . . . . . 2-3

Input Module Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

1756-IA16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

1756-IA16I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

1756-IA8D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

1756-IB16D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

1756-IB16I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

1756-IB32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

1756-IF6I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

1756-IF16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

1756-IM16I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

1756-IR6I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

1756-IT6I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

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Publication 1757-RM810A-EN-P - May 2002

Output Module Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

1756-OA16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

1756-OA16I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

1756-OA8D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

1756-OB16D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

1756-OB16I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

1756-OB32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

1756-OF6CI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

1756-OF6VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

1756-OF8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Serial Interface Module (SIM) TC-MUX021 . . . . . . . . . . 2-19

Chapter 3

Functional Blocks

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

System Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

CONTROLMODULE (Continuous Control). . . . . . . . . . . 3-1

SCM (Sequential Control) . . . . . . . . . . . . . . . . . . . . . . . 3-2

Auxiliary Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

AUXCALC (Auxiliary Calculation) . . . . . . . . . . . . . . . . . 3-3

DEADTIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

GENLIN (General Linearization) . . . . . . . . . . . . . . . . . . 3-6

LEADLAG (Lead Lag) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

TOTALIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Device Control Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

DEVCTL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Data Acquisition Block . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

DATAACQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

IO Channel Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

AICHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

AOCHANNEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

DICHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

DOCHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

PWMCHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

SIFLAGARRCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

SINUMARRCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

SITEXTARRCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Logic Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

2OO3 (2 out of 3 voting) . . . . . . . . . . . . . . . . . . . . . . . 3-16

AND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

CHECKBAD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

DELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

EQ (Equal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

FTRIG (Falling-edge Trigger) . . . . . . . . . . . . . . . . . . . . 3-18

GE (Greater than or Equal to). . . . . . . . . . . . . . . . . . . . 3-18

GT (Greater Than) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

LE (Less than or Equal to) . . . . . . . . . . . . . . . . . . . . . . 3-19

Publication 1757-RM810A-EN-P - May 2002

vii

LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

LT (Less Than). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

MAX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

MAXPULSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

MIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

MINPULSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

MUX (Multiplexer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

MUXREAL (Real Multiplexer) . . . . . . . . . . . . . . . . . . . . 3-22

MVOTE (Majority Voting). . . . . . . . . . . . . . . . . . . . . . . 3-22

NAND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

NE (Not Equal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

nOON (n out of N voting) . . . . . . . . . . . . . . . . . . . . . . 3-24

NOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

NOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

OFFDELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

ONDELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

OR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

PULSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

QOR (Qualified OR) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

ROL (Rotate Output Left) . . . . . . . . . . . . . . . . . . . . . . . 3-27

ROR (Rotate Output Right) . . . . . . . . . . . . . . . . . . . . . . 3-27

RS (Reset dominant SR-FLIP-FLOP) . . . . . . . . . . . . . . . . 3-28

RTRIG (Rising edge Trigger). . . . . . . . . . . . . . . . . . . . . 3-28

SEL (Binary Selection) . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

SELREAL (Real Selection) . . . . . . . . . . . . . . . . . . . . . . . 3-29

SHL (Shift Output Left). . . . . . . . . . . . . . . . . . . . . . . . . 3-29

SHR (Shift Output Right) . . . . . . . . . . . . . . . . . . . . . . . 3-29

SR (Set dominant SR-FLIP-FLOP). . . . . . . . . . . . . . . . . . 3-30

TRIG (Rising or Falling edge Trigger) . . . . . . . . . . . . . . 3-30

WATCHDOG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

XOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Regulatory Control Blocks . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

AUTOMAN (Auto Manual) . . . . . . . . . . . . . . . . . . . . . . 3-31

FANOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

OVRDSEL(Override Selector) . . . . . . . . . . . . . . . . . . . . 3-35

PID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

PIDFF (PID Feedforward). . . . . . . . . . . . . . . . . . . . . . . 3-39

POSPROP (Position Proportional) . . . . . . . . . . . . . . . . . 3-42

PULSECOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45

PULSELENGTH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46

RAMPSOAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47

RATIOBIAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-49

REGCALC (Regulatory Control Calculator). . . . . . . . . . . 3-52

REMCAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55

SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57

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Publication 1757-RM810A-EN-P - May 2002

viii

Sequential Control Module Blocks . . . . . . . . . . . . . . . . . . . 3-59

HANDLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-59

STEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60

TRANSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-61

Utility Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62

FLAG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62

FLAGARRAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62

MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63

NUMERIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63

NUMERICARRAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64

PUSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64

TEXTARRAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-68

TIMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-68

TYPECONVERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-69

Exchange Blocks (ControlNet Interoperability) . . . . . . . . . . 3-70

REQFLAGARRAY (Request Flag Array) . . . . . . . . . . . . . 3-70

REQNUMARRAY (Request Number Array). . . . . . . . . . . 3-70

REQTEXTARRAY (Request Text Array) . . . . . . . . . . . . . 3-71

RSPFLAGARRAY (Response Flag Array) . . . . . . . . . . . . 3-71

RSPNUMARRAY (Response Number Array) . . . . . . . . . . 3-72

RSPTEXTARRAY (Response Text Array) . . . . . . . . . . . . 3-72

Pulse Input Channel/Module Blocks . . . . . . . . . . . . . . . . . 3-73

PICFASTCUTOFF

(Pulse Input Channel with Fast Cutoff) . . . . . . . . . . . . . 3-73

PICHANNEL (Pulse Input Channel). . . . . . . . . . . . . . . . 3-74

PITOTALIZER (Pulse Input Totalizer) . . . . . . . . . . . . . . 3-74

1757-PIM (Pulse Input Module Block). . . . . . . . . . . . . . 3-75

1Publication 1757-RM810A-EN-P - May 2002

Chapter

Introduction to Control Builder Components

Component Categories and

Types

We divide the Control Builder components into these two major

categories:

•Hardware Relation Category (physical equipment)

•Functional Relation Category

Hardware relation category

The hardware relation category includes the physical equipment

blocks provided in Control Builder. These blocks let you quickly

integrate the related control hardware into your control strategy.

Figure 1.1 on page 1-2 shows the physical equipment that relates to

the corresponding hardware relations covered in this document for a

typical non-redundant system. Figure 1.2 on page 1-3 shows the

physical equipment that relates to the corresponding hardware

relations for a typical redundant system.

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Publication 1757-RM810A-EN-P - May 2002

1-2 Introduction to Control Builder Components

Figure 1.1 Physical Equipment reference for corresponding hardware component

in typical non-redundant system architecture.

42778

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