[PDF] SCL - Professional Control Corporation PDF S17-SCL.pdf

2 oct 2019 · PLC programming > SCL (Structured Control Language) STEP 7 Basic/ Professional V15 1 and SIMATIC WinCC V15 1 System Manual

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[PDF] SCL - Professional Control Corporation

2 oct 2019 · PLC programming > SCL (Structured Control Language) STEP 7 Basic/ Professional V15 1 and SIMATIC WinCC V15 1 System Manual

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Application Examples and other Siemens publications – e g Catalogs – the contents of tags and block names right up to clear programming in SCL You can

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[PDF] SCL - Professional Control Corporation

[PDF] SCL - Professional Control Corporation

Siemens

Kelly Anton | 10-24-2019

Agenda

Brief Overview of SCL

SCL Editor

Create simple SCL block

Debugging SCL

Data types

Program Control

Math, Strings and Arrays

Live Demos

SCL (Structured Control Language) - Defined

High-level programming language based on PASCAL

Text based language

SCL - Common Uses

Math

String Operations

Array Operations

Communication

Program Flow

SCL - Options > Settings (Editor Settings)

General > Script/text editors Font size

PLC programming > SCL (Structured Control Language)

SCL - FC/FB Blocks

Add New SCL FC/FB Block

SCL - FC/FB Block Parameters

Create parameters in interface area just like LAD

Step 7 5.x parameters

in code. Easier in TIA. SCL - FC/FB Block Parameters New Option with V15.1 Interface area setting for Table view or Textual view Options > Settings > PLC Programming > SCL > Interface

SCL - Calling FC's and FB's

Call FC/FB from LAD

Call FC from SCL

Call FB from SCL

SCL - SCL Network Embedded in Ladder (LAD)

Insert SCL Network in LAD...

SCL - General Rules

Instructions can span several lines

Each instruction ends with a semicolon ;

Not case sensitive

SCL - Comments

Document your code

Comments do not affect program execution

SCL - Regions

Used for readability of code

SCL - Built-in functions

Ctrl + Space brings up a list of functions & tags

Use Instructions tab and drag into code

Start typing ... to use intellisense

SCL - Surround with

Quickly wrap selected lines of code with statement

SCL - Debugging Syntax Errors

Missing ; at end of statement

Used = instead of := for assignment

Start with first error because it could be causing other errors

SCL - Debugging Logic Errors

Syntactically correct, but logic is incorrect

Monitor all logic or monitor from selected line on

Use Watch Tables

SCL - Debugging Logic with Breakpoints

As of V15 the following CPU's support breakpoints

S7300/400 and S7-1500 (firmware 2.5 or later)

Single step

Run to cursor

Breakpoint

not allowed.

SCL - Data types and conversion

Implicit conversion will take place or use CONVERT

SCL - Typed and non-typed constants

Implicit conversion will take place

It is best to type the constants, eliminates yellow warnings

INT#, DINT#, REAL# etc.

SCL - Result data Type of Arithmetic functions

Two fixed-point numbers with sign, result receives larger type

INT + DINT = DINT

Two fixed-point numbers without sign, result receives larger type

USINT + UDINT = UDINT

One fixed-point number with sign and the other does not, result receives next larger type with sign

SINT + USINT = INT

One fixed-point number and floating point, result receives floating point type

INT + REAL = REAL

Two floating-point types, result receives larger floating point type

REAL + LREAL = LREAL

SCL - Arithmetic, Logical and Relational expressions

SCL - Program Control with If ... Then ...

Basic Instructions - Drag into SCL code

SCL - Program Control with CASE ... OF ...

SCL - Program Control with For, While and Repeat loops

Tip: Enable Monitor Loops

SCL - Program Control with For, While and Repeat loops SCL - Program Control with For, While and Repeat loops

CONTINUE

Finishes current execution of FOR, WHILE, or REPEAT loop Skips remaining lines and jumps to loop check condition EXIT Leaves a FOR, WHILE, or REPEAT at any point in loop

Skips remaining lines while exiting loop

SCL - Math compared to CALCULATE LAD Block

CALCULATE block uses INx parameters in expressions SCL expression uses actual tag names including constants

[PDF] [PDF] SCL - Professional Control Corporation