It provides an example of OPC data interface as client in MS-Excel. The code is written in VB scr ipt in excel workbook which imports data from S7 PLC via OPC protocol through MPI interface.

An example of establishing communication between siemens HMI and PC. HMI project has been attached here alonmg with vb project. Communication medium is MPI. Data is read/write through VB user form into siemens PLC.