Install the Matching PCS 7 Industry Library for PCS 7 V9.1 SP1

For a new SIMATIC PCS 7 V9.1 SP1 system that needs Industry Library blocks, use the Industry Library release specified for that PCS 7/APL configuration; do not install PCS 7 V9.0 APL and Basis Library simply because an earlier Industry Library release was once used with V9.1. Siemens' Industry Library V9.1 SP1 Update 1 readme requires PCS 7 V9.1 SP1 with Industry Library V9.1 and states the IL version must match the APL version unless an exception is explicitly listed. Verify the exact release combination in Siemens' Compatibility Tool before installing.

How the Library Versions Relate

The PCS 7 Industry Library (IL) extends the Advanced Process Library (APL); the current Siemens readme says its supplied blocks are used together with APL blocks. It also says the IL version must be adapted to the APL version in the project and is not backward- or upward-compatible unless the software requirements explicitly allow it. Therefore, APL, Basis Library, PCS 7, and IL are separate version facts to check; a PCS 7 version number alone does not prove the correct pairing.

What the V9.1 SP1 Documentation Requires

Siemens' V9.1 SP1 Update 1 readme specifies SIMATIC PCS 7 V9.1 SP1 with the Industry Library V9.1 for PCS 7 as a minimum for those blocks. It describes a separate IL setup and notes that the full library must be installed before its update package. These requirements support installing the matching IL package; they do not establish that every PCS 7 setup automatically includes the optional Industry Library.

Recommended Installation Decision

Identify the exact PCS 7 release and service pack, installed APL and Basis Library revisions, and whether the project uses Industry Library blocks.
Check the Siemens Compatibility Tool for this exact combination and the applicable IL release notes.
If building a V9.1 SP1 system that requires IL blocks, install the compatible IL V9.1 package and its required updates according to its readme. Follow the package's stated prerequisites and upgrade sequence.
Do not add older APL/Basis Library versions alongside the new installation unless the compatibility tool and upgrade documentation specify that arrangement for the project.
Update the project's block types and OS data only as required by the selected library documentation, then compile and verify the project in a test environment.

Using an Older Library Combination

The discussion reports that PCS 7 V9.1 SP1 with APL V9.0 SP3 Update 6 and Basis Library V9.0 SP3 Update 6 was considered compatible in that historical case, with functions introduced in APL V9.1 unavailable. Treat that as a dated configuration-specific answer, not a general guarantee. Check the current Compatibility Tool entries and associated footnotes for the actual installed components before using it.

Industry Library Licensing

The discussion's separate licensing question was answered that an Industry Library runtime license is required for each AS onto which IL components are loaded. Siemens' product catalog lists V9.1 runtime license products by AS quantity. Confirm ordering and licensing against the exact IL edition and deployment architecture; an engineering license and an AS runtime license serve different purposes.

Verification

After installation, check the installed IL and APL revisions, confirm the project's block types resolve from the intended libraries, and compile the AS and OS using the documented project-update procedure. Verify that required OS picture objects and faceplates are available; Siemens' readme says project faceplates must be updated through the OS Project Editor's “Basis data” tab. A successful setup alone does not confirm that every project block is licensed or operational.

Limitations and Operational Precautions

The V9.1 SP1 Update 1 readme is a later update document and may include requirements added after the original 2022 discussion. The exact historical compatibility of V9.0 SP3 Update 6 with the user's V9.1 SP1 configuration depends on Compatibility Tool footnotes not reproduced here. Do not combine library versions based only on a general forum statement.

Engineer FAQ

Use IL V9.1 when the V9.1 SP1 project and APL configuration require it; verify the exact combination in Siemens' compatibility resources. Check runtime licensing for each AS that uses IL blocks.

Technical References

Siemens, PCS 7 Industry Library Readme V9.1 SP1 Update 1, §§7.3–7.4 and configuration notes: https://support.industry.siemens.com/cs/attachments/109480136/SIMATIC_PCS_7_Industry_Library_V91SP1UPD1_Readme.pdf
Siemens, Manufacturer devices PA Accelerator, product catalog entries for PCS 7 Industry Library V9.1 runtime licenses: https://support.industry.siemens.com/cs/attachments/109767120/Manufacturer_devices_PA_Accelerator_V4_2_0.pdf
Siemens Compatibility Tool: https://support.industry.siemens.com/cs/ww/en/view/64847781