DEAR Jacobson:
thanks to you for writing this quotation ,I make this connection between s7-1200 and LabView because as you say NI OPC server provide support for Siemens but
now I work on ABB automation builder (codeSYS) for this can give more details for example how I will make this connection by Ethernet IP.
or how we can add driver to NI OPC server which support ABB
Thanks for you again .