Import ladder diagram into a Simulink subsystem
Simulate, test, and validate your
.L5X ladder diagram files by importing your ladder diagram files into Simulink®. Use the
plcimportladder function to import your ladder diagram files into Simulink. Simulink PLC Coder™ supports only import of ladder diagram files created by using Rockwell Automation® RSLogix 5000® and Studio 5000 ® integrated development environments (IDEs).
The ladder diagram in the
simple_timer.L5X file controls a motor by using an input switch (
Switch_A) and a timer (
Motor_timer). This ladder diagram was created using the Studio 5000 IDE.
Light1, Light2, and Motor are the outputs of this ladder diagram.
Before using the
plcimportladder function to import your ladder diagram files into Simulink:
Verify that your .
L5X ladder diagram
Verify that the
.L5X ladder diagram file uses blocks that are supported by Simulink PLC Coder. For a list of supported blocks, see Simulink PLC Coder Ladder Diagram Blocks. If your ladder diagram contains custom instructions that are not supported use the
Custom Instruction block to create your instructions in Simulink. For more information, see Custom Instruction. To create a custom instruction, see Create Custom Instruction in PLC Ladder Diagram Models.
To import the
simple_timer.L5X ladder diagram file into Simulink, use the
The ladder diagram is imported into Simulink and a
simple_timer.slx file is created. The current folder also contains a
simple_timer_value.mat file that loads the initial values for
Motor_timer into the model data store memory. The data store memory also contains state information of elements of the ladder diagram. This state information is updated by the model during simulation.
During the ladder diagram import, Simulink PLC Coder:
Imports rung comments. For example, rung two of
simple_timer.L5X has the comment
Motor On Delay Timer. This comment also appears in the Simulink model as well.
Imports Add On Instruction (AOI) with mixed-order arguments, while preserving the order of the arguments. This order argument is preserved during ladder diagram code generation as well.
simple_timer.L5X ladder diagram file is located in Controller simple_timer > MainTask > MainProgram > MainRoutine.
simple_timer.slx ladder diagram is located in
simple_timer > MainTask > MainProgram > _Logic. This structure is similar to the structure in the Rockwell Automation IDE.
To verify the imported ladder diagram:
Signal Builder block to
Scope block to the
Scope block and click the
This image shows the
Scope block output for the model simulation. The
Motor (simple_timer) output turns on three seconds after
Switch_A is turned on and turns off as soon as
Switch_A is turned off. This behavior is the expected behavior of the ladder diagram.
filename— Name of the ladder file
Specifies the name of the ladder file to read. Depending on the location of your file, you can either specify the name of the file or provide the full or relative path. name.
comma-separated pairs of
the argument name and
Value is the corresponding value.
Name must appear inside quotes. You can specify several name and value
pair arguments in any order as
[mdlName,mdlLib,genBusScript] = plcimportladder('sampleLadder.L5X','OpenModel','on','TopAOI','sampleAOI')
OpenModel— Keep the model open
At the end of import process, the model is hidden by default. To keep the model open at the end of import, set the value of
TopAOI— Top AOI name
Specify the function blocks that is to be imported. The software imports it into a ladder diagram 'runner' block.
mdlname— Simulink model name
Specifies the name of the generated Simulink model.
mdllib— Simulink library name
Specifies the name of the generated Simulink model library.
genbusscript— Name of the bus script
Specifies the name of the generated bus script.