As workaround until we hopefully get the switch to define how a enum is exported, you can define a INT variable, which is a reference to the enum.
- In PLC program you use the Enum variable
- In HMI program you use the REFERENCE TO INT variable
- While you have now 2 different variable names:
- Use PLC refactoring to rename the PLC internal used ENUM variable
- Use original name of enum variable as INT variable for HMI, to avoid adapting of variable names in HMI program.
VAR_GLOBAL
// ENUM variables used in PLC program
_enTest: EN_Test;
_stTest: ST_Enums;
END_VAR
VAR_GLOBAL
// INT variables used in HMI program
enTest: REFERENCE TO INT;
stTest: REFERENCE TO ST_Enums_HMI;
END_VAR
PROGRAM PLC_PRG
VAR
ptrTest: POINTER TO INT;
ptrStruct: POINTER TO ST_Enums_HMI;
END_VAR
// Set referencet to single variable
ptrTest := ADR(_enTest);
enTest REF= ptrTest^;
// Set reference to struct variable
ptrStruct := ADR(_stTest);
stTest REF= ptrStruct^;
When the Enums are members of a struct, you can do the same, by duplicating the structure and replacing the ENUM type by INT type. Keep in mind, that both structures MUST be 100% identical (order & data type of elements)
| STRUCT with ENUM (for PLC) |
STRUCT with INT instead of ENUM (for HMI) |
TYPE ST_Enums :
STRUCT
strText: STRING(10):='Hallo';
enTestA: EN_Test;
enTestB: EN_Test;
enTestC: EN_Test;
bEnd: BOOL;
END_STRUCT
END_TYPE
|
TYPE ST_Enums_HMI :
STRUCT
strText: STRING(10):='Hallo';
enTestA: INT;
enTestB: INT;
enTestC: INT;
bEnd: BOOL;
END_STRUCT
END_TYPE
|
Unzip attached PLC example project "enum-workaround.zip" to test it.
