Languages used in RSLogix 5000

KronoTech

PLC

Ladder Logic

RSLogix 5000

Controller Organizer

Programs / Routines

Languages

Structured Text

HMI

Instruments

RSLogix 5000 allows you to use multiple languages in the same project.

Ladder Logic Diagram (LLD)

Ladder Diagrams are one of the most used languages in PLC today. You can do almost anything with this very flexible language. Ladder Logic Diagram is best used for:

  • Boolean operations
  • Complex logical operations
  • Message and communication processing
  • Interlocks
  • Troubleshoot a machine or process

Function Block Diagram (FBD)

Function Block Diagram is a graphical language. In FBD, program elements appear as blocks, which are connected together with lines that represent wires in a way, that look much like a circuit diagram. Function Block Diagram is best used for:

  • Drive control
  • Loop control (PID)
  • Calculation in fluid control

Sequential Function Chart (SFC)

Sequential Function Chart is a graphical language used to organize the flow and control of complex, simultaneous operations. It graphically shows the state and the transition used in a process. SFC is best used for:

  • Simultaneous operations
  • Repetitive sequences of operations
  • Batch process
  • Motion control
  • State machine

Structured Text (ST)

Structured Text is a high-level language that resembles to Pascal or Basic. Programmers trained in those languages often is very easy to learn. ST allows easy modeling and performs loops and conditional branching. ST is best used for:

  • Complex mathematical operations
  • Array and table processing
  • ASCII string handling

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