Licensing Information - References - SIMATIC AX - AX Hardware Engineering documentation - Hardware Engineering,

To use the OPC UA Server service, you need to purchase an appropriate license for your PLC. The type of license required depends on the specific PLC model:

• Small License: Required for S7-1500 PLCs like 1511, 1512, 1513.
• Medium License: Required for S7-1500 PLCs like 1515, 1516
• Medium License: Required for PLCs like 1515, 1516, Software Controller PLC 1507, and PLC 1516pro-2PN.
• Large License: Required for high-performance PLCs like 1517 and 1518.

Each license is specific to the PLC's capacity and performance. Ensure you select the correct license type based on your PLC model to enable the OPC UA Server functionality.

For more details on purchasing and activating the license, please refer to the Siemens documentation or contact your Siemens representative.