Siemens SIMATIC S7-1500 Operating Instructions Manual page 53

Establish connection
To establish a connection to the OPC UA server, use the end point URL
"opc.tcp://192.168.73.155:4840" as OPC UA Discovery.
To access the Web server, enter the address "https://192.168.73.155" in your browser.
CPU 1505SP (F) Ready4Linux Version 2.7
Operating Instructions, 05/2019, A5E46864285-AA
Commissioning in STEP 7
5.4 Communication between Linux and CPU
53