Supported Blocks

For Simulink^®semantics not supported bySimulink PLC Coder™, seeStructured Text Code Generation Limitations.

View Supported Blocks Library

To view a Simulink library of blocks that theSimulink PLC Codersoftware supports, typeplclibin the Command Window. The coder can generate Structured Text code for subsystems that contain these blocks. The library window is displayed.

This library contains two sublibraries, Simulink and Stateflow^®. Each sublibrary contains the blocks that you can include in aSimulink PLC Codermodel.

SupportedSimulinkBlocks

The coder supports the following Simulink blocks.

Additional Math & Discrete/Additional Discrete

Transfer Fcn Direct Form II

Transfer Fcn Direct Form II Time Varying

Unit Delay Enabled (Obsolete)

Unit Delay Enabled External IC (Obsolete)

Unit Delay Enabled Resettable (Obsolete)

Unit Delay Enabled Resettable External IC (Obsolete)

Unit Delay External IC (Obsolete)

Unit Delay Resettable (Obsolete)

Unit Delay Resettable External IC (Obsolete)

Unit Delay With Preview Enabled (Obsolete)

Unit Delay With Preview Enabled Resettable (Obsolete)

Unit Delay With Preview Enabled Resettable External RV (Obsolete)

Unit Delay With Preview Resettable (Obsolete)

Unit Delay With Preview Resettable External RV (Obsolete)

Discrete-Time Integrator

Coulomb and Viscous Friction

Discrete Transfer Fcn

Discrete Derivative

Discrete FIR Filter

Discrete Filter

Discrete PID Controller

Discrete PID Controller (2 DOF)

Discrete State-Space

Discrete-Time Integrator

FIR Interpolation(DSP System Toolbox)

Integer Delay

内存

Tapped Delay

Transfer Fcn First Order

Transfer Fcn Lead or Lag

Transfer Fcn Real Zero

Unit Delay

Zero-Order Hold

Logic and Bit Operations

Detect Fall Nonpositive

Detect Rise Nonnegative

Detect Rise Positive

Extract Bits

Interval Test

Interval Test Dynamic

Logical Operator

Shift Arithmetic

Lookup Tables

Dynamic-Lookup

Interpolation Using Prelookup

MinMax Running Resettable

Trigonometric Function

Check Discrete Gradient

Check Dynamic Lower Bound

Check Dynamic Upper Bound

Check Input Resolution

Check Static Lower Bound

Check Static Upper Bound

Function-Call Subsystem

Repeating Sequence Interpolated

Repeating Sequence Stair

User-Defined Functions

MATLAB Function(MATLAB Function Block)

SupportedStateflowBlocks

The coder supports the following Stateflow blocks.

Stateflow

Chart(Stateflow)

State Transition Table(Stateflow)

Truth Table(Stateflow)

Blocks with Restricted Support

SimulinkBlock Support Exceptions

TheSimulink PLC Codersoftware supports theplclibblocks with the following exceptions. Also, seeStructured Text Code Generation Limitationsfor a list of limitations of the software.

If you get unsupported fixed-point type messages during code generation, update the block parameter. Open the block parameter dialog box. Navigate to theSignal AttributesandParameter Attributestabs. Check that theOutput data typeandParameter data typeparameters are notInherit: Inherit via internal rule. Set these parameters to eitherInherit: Same as inputor a desired non-fixed-point data type, such asdoubleorint8.

StateflowChart Exceptions

If you receive a message about consistency between the original subsystem and the S-function generated from the subsystem build, and the model contains a Stateflow chart that contains one or more Simulink functions, use the following procedure to address the issue:

Open the model and double-click the Stateflow chart that causes the issue.
The chart Stateflow Editor dialog box is displayed.
Right-click in this dialog box.
In the context-sensitive menu, selectProperties.
The Chart dialog box is displayed.
In the Chart dialog box, navigate to theStates When Enablingparameter and selectHeld.
ClickApplyandOKand save the model.

Data Store Memory Block

To generate PLC code for a model that uses aData Store Memoryblock, first define aSimulink.Signalobject in the base workspace. Then, in theSignal Attributestab of the block parameters, set the data store name to resolve to thatSimulink.Signalobject.

For more information, seeData Stores with Data Store Memory Blocks.

Reciprocal Sqrt Block

TheSimulink PLC Codersoftware does not support the SimulinkReciprocal SqrtblocksignedSqrtandrSqrtfunctions.

Lookup Table Blocks

Simulink PLC Coderhas limited support for lookup table blocks. The coder does not support:

Number of dimensions greater than 2
Cubic spline interpolation method
Begin index search using a previous index mode
Cubic spline extrapolation method

Note

TheSimulink PLC Coder软件不支持仿真软件查找Table Dynamic block. For your convenience, the plclib/Simulink/Lookup Tables library contains an implementation of a dynamic table lookup block using the Prelookup and Interpolation Using Prelookup blocks.

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