Shcneider Electric. Reference manual. PL7 Micro/Junior/Pro. Description of the PL7 software

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About the Book

At a Glance

Document Scope This manual describes the instructions and objects that can be addressed in

programmable Micro, Premium and Atrium PL7 programming languages.

Validity Note The updating of this publication takes into account the functions of PL7V4.5.

Nevertheless it can be used to set up earlier PL7 versions.

User Comments We welcome your comments about this document. You can reach us by e-mail at

techpub@schneider-electric.com

About the Book

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Description of PL7 software

Presentation

Aim of this part This part introduces the PL7 software. It describes the basic elementary ideas for

programming Micro and Premium PL7s.

What's in this

Part?

This part contains the following chapters:

Chapter Chapter Name Page

1 Introducing PL7 software 15

2 Description of PL7 object language 25

3 User memory 57

4 Operating modes 75

5 Software structure 85

Description of PL7 software

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Introducing PL7 software

Presentation

Subject of this

chapter

This chapter introduces the main characteristics of PL7 software.

What's in this

Chapter?

This chapter contains the following topics:

Topic Page

Presentation of PL7 Software 16

Presenting PL7 languages 17

PL7 software structure 21

Function modules 23

Introducing PL7 software

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Presentation of PL7 Software

General Points Designing and setting up applications for Micro and Premium PLCs is done using

PL7 software.

3 types of PL7 software are available:

z PL7 Micro

z PL7 Junior

z PL7 Pro

PL7 Software The following table shows the differences between the 3 types of software.

Key:

A = Atrium PLCs

M = Micro PL7s

P = Premium PL7s

- = not available

Writing

Conventions

In the continuation of the document:

z the notation PL7 or PL7 software is used to refer to any of the 3 types of PL7

software, Micro, Junior and Pro.

z the Premium notation is used to refer to any of the processors TSX 57, PMX 57

and PCX 57.

Services PL7 Micro PL7 Junior PL7 Pro

Programming/Debugging/Use M M/P/A M/P/A

User function blocks Creation - - P/A

Use - P/A P/A

Operating screens Creation - - M/P/A

Use - M/P/A M/P/A

Function modules - - P/A

Diagnostic DFB function block - - P/A

Introducing PL7 software

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Presenting PL7 languages

General points The PL7 software has 4 programming languages:

z ladder

z instruction list

z structured text

z Grafcet

The following table gives the possible uses of the languages according to the type

of PL7.

Key:

X = available

- = not available

These languages can be mixed within the same application. One section of program

can be written in ladder, another in text…

These languages set up:

z pre-defined function blocks (Timing, counters,….),

z application specific functions (analogue, communication, counting…),

z specific functions (time management, character strings…),

Language objects can be symbolized using the variables editor or on-line in the

program editors.

The PL7 software complies with the IEC 1131-3 standard (See Reference Manual,

Volumes 2 and 3).

Language Micro PL7 Premium PL7

Ladder X X

Instruction list X X

Structured text X X

Grafcet X (except for macro steps) X

Introducing PL7 software

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Ladder Ladder (LD) is a graphic language. It is used to transcribe diagrams to relays. It is

adapted in the combination process.

It offers basic graphic symbols: contacts, coils, blocks.

Writing numerical calculations is possible within the operation blocks.

Example of a contact network

LD : MAST - CHART

S.F3

S.F4

S.F5 S.F6 S.F7 S.F8S.F2S.F1F12F11 F9 F10 F8 F7 F6 F4 F3 F2

OPER

COHP

F (...)

(*Awaiting drying*)

%L100

%I1.0 %M12 %I1.7

%MT4.Q

%M17

%I1.10 %Q2.3 %M27 %MT0 %M25 %MW0.X

%M2 %I1.4

%MW15:=%MW18+500

IN MT Q

SOUND MODE

TB: 1 mn

TMP: 9999

MODIF: Y

OPERATE

%Q2.5

SR2

Introducing PL7 software

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Instruction list

language

Instruction list language (IL) is a Boolean "machine" language used to write logic and

numeric processes.

Example of how to program in instruction list language

Structured text

language

Structured text language (ST) is an "IT" type language used to write structured logic

and numeric processes.

Example of how to program in structured text language

IL : MAST - SR1

! %L0:

ANDN

OR (

AND

)

AND

%I1.0

%M12

%MT4.Q

%M17

%I1.7

%Q2.5

! %L5:

ANDN

AND

[ %MW15 :=

%I1.10

%Q2.3

%M27

%MT0

%MT0.Q

%M25

%MW0:X5

%MW18+500]

! %L10:

AND

SR2

%I1.2

%I1.4

ST : MAST - SR10

( * Searching for the first element which is not zero in a table of 32 words

Determining its value (%MW10 ) , its rank (%MW11)

This search is done if %M0 is set to 1

%M1 is set to 1 if an element without a nought exists, unless it is set to 0 *)

IF %M0 THEN

FOR %MW 99 := 0 TO 31 DO

IF %MW100 [%MW99]< > 0 THEN

%MW 10 : =%MW100 [%MW99];

%MW 11 : =%MW 99;

%M1 : = TRUE;

EXIT; (*Exiting the loop FOR*)

ELSE

%M1 : = FALSE;

END_IF;

END_FOR;

ELSE

%M1 : = FALSE;

END_ IF;

Introducing PL7 software

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Grafcet language Grafcet language is used to represent the operation of a sequential automatic

system in a structured and graphic form.

Example of how to program in Grafcet language.

GRAFCET : MAST - CHART

F11

F8 F9

F5F4

F10

F12