The 5 Most popular PLC programming languages nowadays

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The 5 most popular PLC programming languages
nowadays

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How are PLCs programmed?

• Basically, the PLC program is an intermediate
  link between the input and output devices
  connected to the PLC. The following are the types
  of PLC programming languages
• Ladder diagram (LD)
• Function Block Diagram (FBD)
• Sequential Function Charts (SFC)
• Structural Text (ST)
• Instruction List ( IL)

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Ladder diagram (LD) or the Ladder Logic Programs

• This is the most popular and preferred type of
  PLC programming language. Since PLCs are
  programmed with the basic relay logic, the ladder
  logic uses simple normally open (NO) normally
  closed (NC) and other lines of code instructions.
  
• One can actually witness the process logically
  through the Rungs and data arriving as inputs
  to the components of PLC.

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Function Block Diagram (FBD)

• FBD programming language is used for multiple
  repetitive functions like starters, closed-loop
  control, PID loops, etc. Each component of the
  FBD is connected to the preceding components
  output.
• In this, the data flows in a nested manner from
  one block to the other virtually. The
  identifiers, keywords, variables, and data types
  need to be taken care of in this type of
  programming.

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Sequential Function Charts (SFC)

• The SFC similar to LD and FBD, and one of the
  graphical programming languages for PLC. SFC is
  used to write concurrent programs between steps
  and transitions. These conduct actions based on
  logical conditions.
• This programming language has logic like that of
  a flow chart. The program is divided into steps.
  And, the steps can either be active or inactive.

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Structural Text (ST)

• This programming is very similar to that of
  high-level languages like Basic, Pascal, or C.
  This is a great choice for implementing complex
  algorithms and mathematical logic. It is very
  easy to make modifications in this program as per
  the standard format.
• The common set of instructions in this
  programming language are IF, WHILE, CASE, RETURN,
  FOR, REPEAT, etc.

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Instruction List ( IL)

• This is an assembly language type of PLC
  programming language. It has a high level of
  execution speed. As compared to others, IL has
  very low memory consumption. It makes use of the
  concept STACK. The mnemonic codes are usually
  used for IL-based PLC programming likeANBORB
• LDA
• ANI

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In Conclusion

• PLCs have played a pivotal role in the automation
  of various industries and deserve credit for the
  same. The matter of deciding which PLC
  programming language is the best for you depends
  on the complexity of your problem at hand. Each
  of these programming languages serves its own
  unique purpose.

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Contact Us

• Email info_at_narola.email
• Contact number 1 [phone]
• Website https//www.narolainfotech.com/plc-progra
  mming-services

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