Block Parameters in Generated Code

To control how the block parameters appear in the generated code, you can either define the parameters as Simulink.Parameter objects in the MATLAB^® workspace or use the Model Parameter Configuration dialog box. For more information, see Control Appearance of Block Parameters in Generated Code.

Simulink^® PLC Coder™ exports tunable parameters as exported symbols and preserves the names of these parameters in the generated code. It does not mangle these names. As a result, if you use a reserved IDE keyword as a tunable parameter name, the code generation can cause compilation errors in the IDE. As a best practice, do not use IDE keywords as tunable parameter names.

The coder maps tunable parameters in the generated code as listed in the following table:

Target IDE	Parameter Storage Class
Target IDE	`Model default`	`ExportedGlobal`	`ImportedExtern`	`ImportedExternPointer`
CODESYS 2.3	Local function block variables	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
CODESYS 3.5	Local function block variables	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
B&R Automation Studio^® 3.0	Local function block variable	Local function block variable	Local function block variable.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
B&R Automation Studio 4.0	Local function block variable	Local function block variable	Local function block variable.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`
Beckhoff^® TwinCAT^® 2.11	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
KW-Software MULTIPROG^® 5.0	Local function block variable	Local function block variable	Local function block variable.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
Phoenix Contact^® PC WORX™ 6.0	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
RSLogix™ 5000 17, 18: AOI	AOI local tags	AOI input tags	AOI input tags.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
RSLogix 5000 17, 18: Routine	Instance fields of program UDT tags	Program tags	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
Siemens^® SIMATIC^® STEP^® 7	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
Siemens TIA Portal	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`
Generic	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.
PLCopen	Local function block variable	Global variable	Variable is not defined in generated code and expected to be defined externally.	Ignored. If you set the parameter to this value, the software treats it the same as `ImportedExtern`.