10_Working With SCL

Creating New Blocks with SCL

SCL

CFC

SFC

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V2 Y2 000.0 % V4

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ABLUFT1 F1

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Database

     y      r      a      r        b        i        L

Overview

SCL Definition of the block name, the input parameters and output parameters, including the default values

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High-level language for defining own function blocks PASCAL-type syntax, therefore very powerful Compiler and debugger are system components

 Algorithm description in structured text Block compilation and debugging Inserting into the existing block library Using the block in the CFC Editor 

User Block: Structures FB FC OB DB UDT

IF CASE

Block type Block attribute VAR_INPUT VAR_OUPUT VAR_IN_OUT

FOR WHILE REPEAT

VAR VAR_TEMP  Algorithm

?

CONTINUE EXIT GOTO RETURN

Demonstration: Arithmetic Block

ARIT Arithmetic block 

R X1

Y R

 

R X2 •

SCL source

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Templates

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Variable declaration

R X3

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 Algorithm

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Compile + Load

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Test

Menu Insert

-> Block Template OB FB FC Comment Constant Parameter  DB Instance DB DB Referencing UDT UDT

-> Control Structure IF CASE FOR WHILE REPEAT

Menü Einfügen

User Block: Startup Characteristics

OB n FBx

FBx SFC6 RD_SINFO n

OB

m

OB m FBx

  p   u    t   r   a    t    S

   t   p   u   r   r   e    t   n    i   c    i    l   c   y    C

  e   s   a   c    l   a    i   c   e   p    S

Compiler and Debugger 

Project S7 station

SCL

CPU Symbols 1. Edit block. S7 program 2. Compile.

Sources

3. Load in the CPU. 4. Debug.

Blocks

Appendix: Source Texts

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Simulation block REACTOR

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