Use PCS 7 Industry Library V9.0 SP1 with PCS 7 V9.1 Only Under Its Listed Conditions

PCS 7 Industry Library V9.0 SP1 is approved for use with PCS 7 V9.1 only under Siemens' stated conditions: the project must be upgraded using “Software update without utilization of new functions,” and the PCS 7 Advanced Process Library and PCS 7 Basis Library must be at least V9.0.3 Update 4. Siemens' Readme for Industry Library V9.1 lists PCS 7 V9.1 as the minimum for that library release and says the Industry Library version must match the project's APL version unless a compatibility exception is explicitly stated. Do not treat base Industry Library V9.0 as equivalent to V9.0 SP1.

Compatibility decision

Use the version-specific Industry Library Readme and its footnotes as the compatibility authority. The V9.0 SP1 Readme explicitly approves that library with PCS 7 V9.1, but only if the project upgrade follows Siemens' “Software update without utilization of new functions” procedure and the project uses at least PCS 7 Advanced Process Library and PCS 7 Basis Library V9.0.3 Update 4.

The Industry Library V9.1 Readme identifies PCS 7 V9.1 as the minimum PCS 7 version for the V9.1 Industry Library. It also states that the Industry Library version depends on the APL version and is neither backward nor upward compatible unless otherwise specified in its software requirements. Select based on the installed APL and the project's upgrade path, not the parent PCS 7 release number alone.

Version selection

Candidate libraryWhat Siemens documentsDecision pointIndustry Library V9.0 baseThe cited cross-version approval is specifically for V9.0 SP1, not base V9.0.Do not infer V9.1 compatibility from the SP1 exception. Check the base release's own requirements.Industry Library V9.0 SP1Approved for PCS 7 V9.1 only with the project-upgrade condition and minimum APL/Basis Library versions stated above.Use only after confirming all conditions in the project.Industry Library V9.1Its Readme requires at least PCS 7 V9.1 and says its release must be matched to the APL version unless a specific exception is documented.Align it with the project's APL release and the exact Readme for the delivered IL package.

How to verify the installed project before choosing

Record the installed versions of PCS 7, PCS 7 Advanced Process Library, PCS 7 Basis Library, and the Industry Library package, including SP and Update levels.
Identify whether the available Industry Library media is base V9.0, V9.0 SP1, or V9.1. A base release and its service pack are distinct library versions; the V9.0 SP1 compatibility exception must not be applied to base V9.0.
For V9.0 SP1 on PCS 7 V9.1, verify that the project upgrade followed “Software update without utilization of new functions” and that both the APL and Basis Library meet the V9.0.3 Update 4 minimum.
For Industry Library V9.1, verify the V9.1 Readme's software requirements against the exact APL and PCS 7 versions in the project. Review the applicable product/readme footnotes before installing.
If the conditions are not met, stop and select a library/project combination explicitly supported by the relevant Siemens Readme and compatibility documentation. Do not try to satisfy an IL compatibility gap by guessing a PCS 7 Update or SP.

Installation and project update considerations

Siemens' V9.0 SP1 Readme calls it an update/service-pack installation and explains its installation prerequisites. Its V9.1 Readme says earlier Industry Library versions below V9.1 must be uninstalled before installing V9.1, and that an update installation requires the corresponding full version to be present. The same Readmes explain that updating the AS project involves copying the library blocks into the project and performing a block type import. These are engineering changes; follow the exact release Readme, retain project backups, and assess compile/download impact under site change control.

How to obtain the library

The ticket's discussion directs users to the Siemens Industry Mall and to the “Sales and Delivery Release: SIMATIC PCS 7 Industry Library V9.1” product note when locating the V9.1 package. Availability and ordering depend on the product release and entitlement. Use the Siemens product note and authorized Siemens sales channel for the correct deliverable rather than an unverified third-party download. The linked version-specific Readmes establish technical applicability, not the customer's license entitlement.

Verification

Before installation, compare the project's recorded PCS 7, APL, Basis Library, and Industry Library versions with the exact software requirements and compatibility footnotes in the corresponding Siemens Readme. For the V9.0 SP1 exception with PCS 7 V9.1, verify both prerequisites: the specified upgrade method and minimum APL/Basis Library V9.0.3 Update 4. After an approved library update, follow the release Readme's project-update procedure and validate the engineering project through the applicable compile checks before any AS download.

Limitations and Operational Precautions

The original question does not state the project's APL version, Basis Library version, PCS 7 Update level, or whether the upgrade path meets Siemens' “without utilization of new functions” requirement. Therefore, the article cannot determine which Industry Library package is correct for that particular project. Compatibility approval does not establish license entitlement, nor does it imply that every Industry Library block or function is appropriate for every project configuration. Preserve version alignment and use the exact installation and project-update instructions for the selected library release.

Engineer FAQ

Is Industry Library V9.0 SP1 approved for PCS 7 V9.1? Yes, conditionally: Siemens requires the specified project-upgrade method and at least APL and Basis Library V9.0.3 Update 4.

Does the V9.0 SP1 approval apply to base Industry Library V9.0? No such approval is established by that Readme; it names V9.0 SP1 specifically.

Can I use Industry Library V9.1 with PCS 7 V9.1? The V9.1 Readme lists PCS 7 V9.1 as the minimum for the PCS 7 Industry Library V9.1. You must still match the IL release to the project's APL version and check the release-specific requirements.

Technical References

Siemens, PCS 7 Industry Library Readme V9.0 SP1 (Online), Readme V9.0 SP1, A5E50248324-AC, §3.3 “Software requirements,” p. 10, and §3.4 “Installing PCS 7 Industry Library,” p. 12. The PDF was downloaded and read; it gives the conditional approval for PCS 7 V9.1, minimum APL/Basis Library levels, and installation notes: https://cache.industry.siemens.com/dl/files/121/109750121/att_928993/v1/IL-Readme-Online_en-US.pdf
Siemens, PCS 7 Industry Library Readme V9.1 (Online), Readme 11/2021, A5E51591867-AA, §§6.3–6.4, pp. 25–26. The PDF was downloaded and read; it states the PCS 7 minimum, APL-version alignment, and installation/project-update requirements: https://cache.industry.siemens.com/dl/files/069/109805069/att_1092465/v1/IL-Readme-Online_en-US.pdf

Use PCS 7 Industry Library V9.0 SP1 with PCS 7 V9.1 Only Under Its Listed Conditions