User manual MATLAB SIMULINK PLC CODER 1

[. . . ] Simulink® PLC CoderTM 1 User's Guide How to Contact The MathWorks Web Newsgroup www. mathworks. com/contact_TS. html Technical Support www. mathworks. com comp. soft-sys. matlab suggest@mathworks. com bugs@mathworks. com doc@mathworks. com service@mathworks. com info@mathworks. com Product enhancement suggestions Bug reports Documentation error reports Order status, license renewals, passcodes Sales, pricing, and general information 508-647-7000 (Phone) 508-647-7001 (Fax) The MathWorks, Inc. 3 Apple Hill Drive Natick, MA 01760-2098 For contact information about worldwide offices, see the MathWorks Web site. Simulink® PLC CoderTM User's Guide © COPYRIGHT 2010 by The MathWorks, Inc. The software described in this document is furnished under a license agreement. The software may be used or copied only under the terms of the license agreement. [. . . ] The code invokes the outputs per the Simulink execution semantics. 2-5 2 Mapping Simulink® Semantics to Structured Text How Stateflow Subsystem Code Maps to Function Blocks This topic assumes that you have generated structured text code from a Simulink model. If you have not yet done so, see "Generating Structured Text Code from the Model Window" on page 1-20. The example in this topic shows generated code for the CoDeSys Version 2. 3 PLC IDE. Generated code for other IDE platforms looks different. 1 Open the plcdemo_stateflow_controller model. 2 Right-click the ControlModule chart and select PLC Coder > Generate Code for Subsystem. The Simulink PLC Coder software generates structured text code and places it in current_folder/plcsrc/plcdemo_stateflow_controller. exp. 3 If you do not have the plcdemo_stateflow_controller. exp file open, open it now in the MATLAB editor. This figure illustrates the mapping of the generated code for a Simulink Subsystem block that contains a Stateflow chart to structured text components. 2-6 How Stateflow® Subsystem Code Maps to Function Blocks Inlined code for Stateflow chart 4 Examine the generated structured text code. The Simulink PLC Coder software aggressively inlines the generated code for the Stateflow chart. The coder performs this inlining because different functions from Stateflow charts share some global state data. However, function blocks in structured text code do not share state data. As a result, the coder software cannot map these functions onto separate function blocks. Instead, it must inline these functions. 2-7 2 Mapping Simulink® Semantics to Structured Text How Embedded MATLAB Subsystem Code Maps to Function Blocks This topic assumes that you have generated structured text code from a Simulink model. If you have not yet done so, see "Generating Structured Text Code from the Model Window" on page 1-20. The example in this topic shows generated code for the CoDeSys Version 2. 3 PLC IDE. Generated code for other IDE platforms looks different. 1 Open the plcdemo_eml_tankcontrol model. 2 Right-click the TankControl block and select PLC Coder > Generate Code for Subsystem. The Simulink PLC Coder software generates structured text code and places it in current_folder/plcsrc/plcdemo_eml_tankcontrol. exp. 3 If you do not have the plcdemo_eml_tankcontrol. exp file open, open it now in the MATLAB editor. This figure illustrates the mapping of the generated code for a Simulink Subsystem block that contains an Embedded MATLAB Function block to structured text components. The coder tries to perform inline optimization on the generated code for Embedded MATLAB subfunctions. If the coder determines that it is more efficient to leave the subfunction as is, it places the generated code in a structured text construct called FUNCTION. The main difference between a FUNCTION_BLOCK and FUNCTION is that a FUNCTION cannot have states and cannot access global variables. 2-8 How Embedded MATLAB® Subsystem Code Maps to Function Blocks Embedded MATLAB code Generated Embedded MATLAB function code 4 Examine the generated structured text code. 2-9 2 Mapping Simulink® Semantics to Structured Text How Alias Data Types Map in Generated Code The coder maps alias data types to the base data type in the generated code. 2-10 3 Generating Test Bench Code 3 Generating Test Bench Code Working with Generated Structured Text In this section. . . "How Test Bench Verification Works" on page 3-2 "Generating and Importing Structured Text" on page 3-2 "Generated Files" on page 3-4 How Test Bench Verification Works The Simulink PLC Coder software simulates your model and automatically captures the input and output signals for the subsystem that contains your algorithm. This set of input and output signal data is the test bench data. [. . . ] plccoderpref('plctargetide', IDEcodename) sets the default target IDE to the one that you specify in IDEcodename. This command ensures Description that IDEcodename persists as the default target IDE for all future MATLAB sessions. plccoderpref('plctargetide', 'default') sets the default target IDE to the factory default target IDE ('codesys23'). Input Arguments 'plctargetide' String directive that specifies the default target IDE. 'IDEcodename' String that specifies the default target IDE. String must be one of: Name codesys23 codesys33 rslogix5000 Description 3S-Smart Software Solutions CoDeSys Version 2. 3 (default) target IDE 3S-Smart Software Solutions CoDeSys Version 3. 3 target IDE Rockwell Automation RSLogix 5000 Series target IDE 8-3 plccoderpref Name brautomation30 plcopen twincat211 generic 'default' Description B&R Automation Studio 3. 0 target IDE PLCOpen XML target IDE Beckhoff TwinCAT 2. 11 target IDE Generic target IDE String directive that sets 'plctargetide' to factory default ('codesys23'). Example Return the current default target IDE. plccoderpref('plctargetide') Set rslogix5000 as the new default target IDE. plccoderpref('plctargetide', 'rslogix5000') 8-4 plcgeneratecode Purpose Syntax Description Generate structured text for subsystem generatedfiles = plcgeneratecode(subsystem) generatedfiles = plcgeneratecode(subsystem) generates structured text for the specified atomic subsystem in a model. subsystem is the fully qualified path name of the atomic subsystem. [. . . ]