ISA Interchange

Welcome to the official blog of the International Society of Automation (ISA).

All Posts

IEC 6-1131-3

The IEC (International Electrotechnical Commission) 6-1131-3 Standard is a widely recognized international standard for the programming of a PLC.

How many ‘Graphical languages’ are there in the IEC  6-1131-3  ?

a.  2

b.  3

c.  4

d.  5

The correct answer is A.
They are Ladder Diagram (LD) and  Function Block Diagram (FBD).

Ladder Diagram

 

Function Block Diagram

 

Programming Languages

1. Graphical

1. Ladder Diagram (LD)

2. Function Block Diagram(FBD)

 

2. Textual

1. Instruction List (IL)

2. Structured Text (ST)

 

3. Program Control Flow

1. Sequential Function Charts (SFC)

Sequential Function Charts are considered by many to be a graphical language.

IEC 61131-3 is the third part of the IEC 61131 family. This consists of:

•Part 1: General Overview

•Part 2 Hardware

•Part 3 Programming Languages

•Part 4 User Guidelines

•Part 5 Communication

•Part 7 Fuzzy Logic

• Part 8 Application Guidelines

Benefits

  • Standard will provide greater uniformity between PLCs
  • Does for the process world what OPC (OLE2) did for the computer world
  • Reuse work
  • Reduce amount of retraining
  • Enables programmers to integrate multiple languages within the same application
  • Does not…–
    Specify physical I/O–
    Memory  address mapping
Mark Weisner
Mark Weisner
Mark Weisner is a technical specialist at ISA.

Related Posts

Coding for Automation Projects Is More Than Writing Code

Translating mathematical equations into code is part of, but also removed from, the development of automa...
Ed Farmer Sep 22, 2020 5:00:00 AM

Advancing Technology in the New Work Scenario

Technological developments have steadily changed the work scenario since the First Industrial Revolution....
Contributing Author Sep 18, 2020 5:00:00 AM

ISA President's Column: Coach, Share, Learn, and Grow

Working Together to Strengthen ISA for Our Members The International Society of Automation (ISA) Presiden...
ISA President Sep 15, 2020 5:30:00 AM