PLC Code Generation Basics

Generate Structured Text

Apps

Simulink PLC CoderGenerate structured text and ladder diagram code from Simulink models, Stateflow charts, and MATLAB functions

Functions

plccoderdemosProduct examples
plccoderprefManage user preferences
plcgeneratecodeGenerate Structured Text or Ladder Diagram (L5X) for the atomic subsystem
plcopenconfigsetOpen Configuration Parameters dialog box for subsystem

Examples and How To

Generate and Examine Structured Text Code

Get started with Structured Text code generation from a simple Simulink® model.

Integrate Generated Code with Custom Code

Call the generated function block with different values of ssMethodType argument for subsystem initialization and computation steps.

Specify Custom Names for Generated Files

Override the default naming convention, which uses the model name for the generated Structured Text code file.

Propagate Block Descriptions to Code Comments

View block descriptions from your model as comments in generated Structured Text code.

Generate Structured Text Code For Simulink Data Dictionary Defined Model Parameters

Configure model to generate structured text code for Simulink.Parameter objects within the model Simulink data dictionary (SLDD).

Structured Text Code Generation Support for Enumerated Data Type Conversion

This example shows how to autogenerate structured text code for the enum to integer conversion model

Use PLC_RemoveSSStep for Distributed Code Generation

This example shows how to generate structured text code for different components of your model, and then allow external integration by keeping ssMethod case names the same.

Structured Text Code Generation for Subsystem Reference Blocks

This example shows how to autogenerate structured text code for subsystem reference blocks.

Concepts

Files Generated with Simulink PLC Coder

Look up the location of files for manually importing the generated Structured Text code to your IDE.

Generated Code Structure for Simple Simulink Subsystems

Map model objects in your Simulink subsystem to constructs in generated Structured Text code.

Generated Code Structure for Reusable Subsystems

Generate Structured Text code from a reusable subsystem and identify the code reuse.

Generated Code Structure for Triggered Subsystems

Generate Structured Text code from a triggered subsystem and identify the trigger event-based execution in the generated code.

Generated Code Structure for Stateflow Charts

Generate Structured Text code from a Stateflow® Chart and identify event-based transitions or absolute time temporal logic in the generated code.

Generated Code Structure for MATLAB Function Block

Generate Structured Text code from a MATLAB Function block and identify the MATLAB® function content in the generated code.

Generated Code Structure for Multirate Models

Generate Structured Text code from a multirate model and identify the multiple execution rates in the generated code.

Generated Code Structure for Subsystem Mask Parameters

Generate Structured Text code from a masked subsystem and identify the mask parameters in the generated code.

Generate Structured Text Code with Logging Instrumentation

Workflow for generating Structured Text code with logging instrumentation.

Global Tunable Parameter Initialization for PC WORX

Learn how global tunable parameters appear in code generated for the PC WORX™ IDE.

Featured Examples

Generating Structured Text for a Simple Simulink® Subsystem without Internal State

Generating Structured Text for a Simple Simulink® Subsystem without Internal State

The code generated for a simple subsystem without internal state.

Open Model
Generating Structured Text for a Reusable Simulink® Subsystem

Generating Structured Text for a Reusable Simulink® Subsystem

The code generated for a reusable subsystem consisting of a few basic Simulink blocks.

Open Model
Generating Structured Text for a Feedforward PID Controller

Generating Structured Text for a Feedforward PID Controller

The code generated for a Feedforward PID Controller implemented using Simulink library blocks.

Open Model
Speed Cruise Control System Using Simulink® and Stateflow®

Speed Cruise Control System Using Simulink® and Stateflow®

Open up the "Controller" subsystem. Notice that this model uses a Triggered Stateflow® Chart to do the "Enable" and "Setpoint" calculation. It uses a discrete PID Controller to compute the "Throttle Command".

Open Model
Speed Cruise Control System Using Variable-Step Continuous Solver

Speed Cruise Control System Using Variable-Step Continuous Solver

In this model, the model solver is set to variable-step continuous (ode45); the sample time of the controller subsystem is set to 0.05. To set the controller sample time, right click on the controller block and select Subsystem Parameters, on the Main tab, set the Sample time parameter. This method allows combined modeling of discrete-time controller and continuous-time plant in the same model with PLC code generation support.

Open Model
Airport Conveyer Belt Control System

Airport Conveyer Belt Control System

Open up the "Controller" subsystem. Open the Stateflow® chart named "Control" chart inside it. This chart implements the control logic for starting and stopping the conveyer belt motor depending on sensor inputs.

Open Model
Generating Structured Text for Simulink® Model with Fixed-Point Data Types

Generating Structured Text for Simulink® Model with Fixed-Point Data Types

Open the subsystem at the top level named 'Subsystem'. Simulate the model and observe the fixed point types displayed on the signals.

Open Model
Generating Structured Text for a Stateflow® Chart

Generating Structured Text for a Stateflow® Chart

The code generated for a Stateflow chart.

Open Model
Generating Structured Text for a MATLAB® Block

Generating Structured Text for a MATLAB® Block

This model shows the code generated for a MATLAB block implementing tank valve control logic.

Open Model
Generating Structured Text for a Simple Simulink® Subsystem Using Multirate

Generating Structured Text for a Simple Simulink® Subsystem Using Multirate

The code generated for a simple subsystem using multirate.

Open Model
Generating Structured Text for Stateflow® Chart with Absolute Time Temporal Logic

Generating Structured Text for Stateflow® Chart with Absolute Time Temporal Logic

The code generated for a Stateflow chart which uses absolute time temporal logic. Simulate the model. Click on the scope to observe the "pulse" output.

Open Model
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