Since firmware version 4.4 the SIMATIC S7-1200 supports OPC UA server natively. Just enable the server in your TIA project - TIA portal V 16 is required. See the slides below to update your S7-1200 to firmware 4.4.
Since firmware version 4.4 the SIMATIC S7-1200 supports OPC UA server natively. Just enable the server in your TIA project - TIA portal V 16 is required. See the slides below to update your S7-1200 to firmware 4.4.