Hello everyone

I have installed Pcs7 v9.1 SP2 software on Windows 10 LTSC 2018, which is programmed in a project as S7-ladder- wincc.

Based on the attached image of SWR_StatusWord, I want to have a status change in one of these bits (DB5.DBB8.2, DB5.DBB8.4, DB5.DBB9.4, DB5.DBB9.5) in case of a Profibus link failure between two controllers (via Siemens CP342-5 module). Although the status of the master and reserve bits is displayed correctly, I do not have any status change in any of the bits such as bit 9 and they are always in the zero state. It is necessary to ensure that redundancy and master switch and access to inputs and outputs work correctly.

I would appreciate sharing solutions if anyone has encountered these problems.

No, the S7-300 CPU 317-2 PN/DP is not supported in PCS 7 V9.1.2.

Siemens officially discontinued support for S7-300 and most S7-400 CPUs starting from PCS 7 V9.0. PCS 7 V9.1.2 is designed to work with modern automation hardware, specifically S7-410 CPUs (including H systems), the Advanced Process Library (APL), integration with WinCC V7.5 SP1/SP2 and higher, and support for Windows 10 LTSC 2019 / 2021.

As far as I know, using the S7-300 is not officially supported in PCS 7 V9.1.2. This issue seems to be more related to general STEP 7 or hardware compatibility rather than PCS 7-specific features, so this might not be the most suitable platform.