To configure a SIMATIC S7-1200 CPU with firmware version V4.3 or higher in TIA Portal, you must install the . This package, specifically HSP_V15_1_0276_001_S71200_CPU_4.3 , is required for STEP 7 Basic or Professional version V15.1 and higher. Key Features of S7-1200 V4.3

You can find the latest Hardware Support Packages, including HSP0276, on the Siemens Industry Online Support (SIOS) portal .

Direct management of certificates on the CPU for secure OUC.

Support for SSL/TLS encrypted TCP communication via IPv4.

Ensure you download the version corresponding to your TIA Portal installation (e.g., HSPs for V15.1). The download usually comes as a .zip or .isp file. 2. Install via TIA Portal Firmware version V4.3 released for S7-1200 - ID: 109763919

Firmware V4.3 introduces several critical security and communication enhancements for the S7-1200 hardware:

Introduction of TCON_IP_V4_SEC to support encrypted connections. Download and Installation Guide 1. Download HSP0276