query_modbus_data_list

This function queries all currently registered Modbus data (TCP / RTU) information stored in the controller.

Definition
DRFLEx.h within class CDRFLEx, public section (line 871)

LPMODBUS_DATA_LIST query_modbus_data_list()
{
    return _query_modbus_data_list(_rbtCtrl);
};

Parameter
None

Return

Value	Description
MODBUS_DATA_LIST	Refer to the Definition of Structure

Example

LPMODBUS_DATA_LIST pParam = Drfl.query_modbus_data_list();

for (int i = 0; i < pParam->_nCount; i++) {
    if (pParam->_tRegister[i]._iType == 0) {     // TCP : 0
        cout << pParam->_tRegister[i]._tData._tcp._iRegValue << endl;
    }
    else {                                       // RTU : 1
        cout << pParam->_tRegister[i]._tData._rtu._iRegValue << endl;
    }
}

This example retrieves all Modbus register information currently registered in the controller, distinguishing between TCP (type = 0) and RTU (type = 1) connections. Each Modbus register’s data value can be accessed from the structure fields depending on the communication type.