Siemens PLC Software Demos Evaluating STEP 7 and TIA Portal Files

Overview: Evaluating Customer Siemens Projects Without a Full License

One of the most common pre-sales engineering tasks is opening a customer-supplied Siemens project file (an S7 program, a TIA Portal archive, a WinCC Flexible screen, or a LOGO! Soft Comfort circuit) just to assess scope, I/O count, and engineering effort before quoting. Because Siemens does not distribute its full PLC engineering suites as freely downloadable demos in the way some vendors do, the question "is there a demo of STEP 7 or WinCC?" surfaces regularly on engineer forums. The honest answer in 2024-2026 is layered: one Siemens tool (LOGO!Soft Comfort) is genuinely free as a fully functional demo with print/simulation limits; another (Siemens Software Center) requires a purchased license key for download; and full STEP 7 / TIA Portal / WinCC evaluation requires either a 14-21 day trial issued by Siemens sales, a time-limited rental license, or a request for physical demo media. This reference walks through every official path, the artifacts each path can and cannot open, and the verification steps to confirm the project is fully readable before you commit to a quote.

Available Siemens Demo and Trial Software Matrix

LOGO!Soft Comfort V8.4 Demo: The Always-Free Option

Of every Siemens engineering tool, LOGO!Soft Comfort is the only one with a perpetually free, fully functional demo. Per the official Siemens support entry LOGO!Soft Comfort V8.4 Demo - ID 109826921, the demo allows users to create, simulate, archive, and print out switching programs targeting the LOGO! 8 (0BA8) and LOGO! 8.FS4 (0BA0) logic modules. The product page at LOGO! Software - Siemens confirms the demo is intended to let customers "get familiar with the software, create and simulate LOGO! programs, test the engineering workflow."

Limitations versus the full commercial license:

• No transfer of compiled programs to a physical LOGO! via Ethernet, USB, or SD card. The demo will compile and simulate, but the "PC → LOGO!" download button is disabled.
• No write access to LOGO! BM with the running program; the demo is read-only when connected to live hardware.
• No online editing of a connected LOGO! module's online program view beyond what the simulation already shows.
• Print/export of the program is watermarked or footer-flagged as demo output on some builds.

For an engineer who has been sent a customer .lsc, .lscp, or .lma file for a quotation review, the LOGO!Soft Comfort V8.4 demo is sufficient to: open the project, view all function blocks, inspect the wiring diagram, simulate I/O behavior, and print out the program as a PDF for inclusion in the bid package. The simulation engine is identical to the full license, so functional review is not compromised.

Install Procedure for LOGO!Soft Comfort V8.4 Demo

1. Navigate to the Siemens Industry Online Support entry 109826921. Sign in with a free Siemens Support account; registration requires only a corporate email.
2. Download the LOGO_Soft_Comfort_V8_4_Demo.zip archive. The package is roughly 350-450 MB depending on language pack selection.
3. Extract and run Setup.exe as Administrator. Select "Demo Installation" when prompted.
4. Choose the supported language (English, German, French, Italian, Spanish, Simplified Chinese, Japanese, Korean are typical; the demo ships with all of them).
5. Reboot if the installer prompts; launch LOGO!Soft Comfort V8.4. The title bar reads "LOGO!Soft Comfort V8.4 - Demo."
6. Verify the demo flag: Help → About → License Type. It should read "Demo (no transfer to device)."

STEP 7 / TIA Portal Trial Access

Unlike LOGO!Soft Comfort, the full STEP 7 (TIA Portal) engineering suite is not distributed as an unguarded download. The official product page at STEP 7 TIA Portal - Siemens describes it as the unified engineering framework for SIMATIC S7-1200, S7-1500, S7-300/400 (via compatibility mode), ET 200, and SINAMICS drives, but the download path is gated. The two official paths to a running copy are:

1. Trial license from a Siemens sales representative or authorized distributor. A 14- or 21-day trial key can be issued against a specific hardware serial number (SSN of an S7-1500 CPU, for example). The trial is bound to that hardware but is fully functional across all TIA Portal features at the licensed edition (Basic, Professional, or a higher bundle).
2. Subscription rental from the Siemens Digital Industries web shop or a distributor. A 30/60/180-day rental key is delivered electronically; installation requires only the download link plus the key file.

Both paths route you to the same installer: the TIA Portal setup package is roughly 30-50 GB depending on the optional components you select (PLCSIM, S7-PLCSIM Advanced, SINAMICS Startdrive, TIA Portal Multiuser, Safety, etc.). The trial/rental key is what unlocks the suite to a usable state; without it, TIA Portal will install and launch, but the "Open Project" workflow is restricted and project compilation is blocked.

Steps to Acquire a TIA Portal Trial

1. Identify the target TIA Portal edition the customer's file was written with. The file extension reveals it: .ap15 = TIA V15, .ap16 = V16, .ap17 = V17, .ap18 = V18, .ap19 = V19, .zap = zipped archive of any of the above.
2. Match the TIA Portal major version to a service pack the customer uses. If the file is V17 and your trial is V19, the open dialog performs a project upgrade prompt; you cannot downgrade.
3. Contact your local Siemens sales engineer or use the "Trial Software" request form on the Siemens Industry Online Support portal. Provide a brief description ("pre-sales evaluation of customer S7-1500 file, estimated 2-week effort") to satisfy the request form.
4. Receive the License Key file (typically ...<SSN>_Key_<date>.zip) by email within 1-3 business days. The Automation License Manager (ALM) installs the key into the local license store.
5. Download the TIA Portal installation media from the link provided in the trial confirmation email. The trial confirmation also lists the ALM download separately.
6. Install TIA Portal, start ALM, drag the key file onto the ALM window, confirm the license appears with the correct target SSN and edition.
7. Launch TIA Portal. The "Open Project" dialog will now show the full file system view. Open the customer file and accept the project upgrade prompt if a version mismatch is detected.

WinCC and WinCC Flexible Evaluation

WinCC for TIA Portal (Comfort Panels, WinCC RT Advanced, WinCC RT Professional) ships with the same trial and rental mechanism as STEP 7 in TIA Portal — they are installed from the same setup package and use the same Automation License Manager. The WinCC configuration tool is included in the TIA Portal Professional trial and can be invoked to open .hmi projects embedded in TIA Portal archives.

The legacy WinCC Flexible 2008 SP5 is a separate product for Mobile Panel 177, MP 277, TP 177B, OP 77B, and the older xP panels. WinCC Flexible is no longer sold or actively distributed as a demo. The official path for evaluation is to request a trial media from Siemens; this is typically a 30-day functional trial. The customer file extension for WinCC Flexible is .hmi embedded in a WinCC Flexible archive, or a .zip of the project folder.

Siemens Software Center for Purchased Licenses

Once a customer has purchased a Siemens license (perpetual or subscription), the Siemens Software Center v3.5 becomes the official download channel. Per the Siemens product page, the Software Center "allows you to download, install, and activate purchased software. You can update your software as new versions become available and launch" it. The Software Center is not a demo tool — it requires the customer to have an active license agreement tied to a Siemens Customer Center account.

For an engineer evaluating a customer file, the Software Center is useful only if (a) your own company already owns a Siemens license that you want to keep current, or (b) the customer provides a read-only access token to their Siemens Software Center to download a specific version. In practice, the TIA Portal trial path (see above) is the lower-friction option for a one-off file review.

Siemens Software Center v3.5 Quick Reference

Simcenter Trials for Simulation-Heavy Projects

If the customer file includes a co-simulation or model-based design component (a digital twin, a Simcenter Amesim model linked to the PLC, or a HEEDS optimization harness), the Simcenter trial download page is the right starting point. The Simcenter trials are 30-day, fully functional evaluation copies of Amesim, STAR-CCD+, HEEDS, and the other simulation tools. They are downloaded directly (no sales contact required) and use a key generated automatically against a registered user.

For pure PLC project review, Simcenter is irrelevant. For an integrated mechatronics bid where the customer wants an off-the-shelf PLC + model-based controls + drive tuning package, Simcenter trials are worth pulling down alongside the TIA Portal trial so the same workstation can be used to evaluate both sides of the project.

Legacy Note: STEP 7 Lite Is No Longer Available

The Siemens support page that the original forum thread cited (support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&nodeid0=10805396) was the home of STEP 7 Lite V3.0, the stripped-down free download that supported S7-300 / ET 200M programming without a license. That page and that product have been retired. The legacy support.automation.siemens.com domain now redirects to support.industry.siemens.com, and STEP 7 Lite is no longer indexed. Engineers searching for "STEP 7 Lite download" today will be redirected to the new portal, where the only related offer is the discontinued-product notice and a recommendation to migrate to TIA Portal.

Requesting Physical Demo Media from Siemens

Standard Request Workflow

1. Identify the local Siemens Industry contact via Siemens - Contact or your nearest Siemens Industry Online Support regional site.
2. Open a Support Request (SR) on the Siemens Industry Online Support portal. Select "Software → Trial license / demo media" as the topic. The form fields include: target TIA Portal version, target SIMATIC hardware (CPU SSN, if any), intended use (pre-sales, training, evaluation), and company VAT/ID.
3. Wait for the SR to be acknowledged (typically 1 business day). Siemens will respond with a trial confirmation email and, in some regions, a download link for the TIA Portal installation media plus the Automation License Manager.
4. Install, activate, and use the trial within the stated window. Save the trial confirmation email — it is the only evidence of the trial terms if the ALM loses the key.

File Compatibility and Project Evaluation Workflow

For engineers opening customer files, the practical concern is not just "can I read the file" but "can I read it without modifying the customer's master." The following is the recommended sequence for an evaluation-only review:

1. Receive the file. Verify the file hash (SHA-256) the customer provides matches what you downloaded. If no hash is provided, compute one with Get-FileHash -Algorithm SHA256 <file> (PowerShell) or sha256sum <file> (Linux) and share it back with the customer for confirmation.
2. Extract the archive to a working folder. Never open the file from the archive directly — the engineering tool may modify file timestamps and lock attributes, complicating round-trip with the customer.
3. Make a read-only copy at the file system level: attrib +R <file.ext> on Windows or chmod 444 <file.ext> on Linux/macOS. This prevents accidental overwrites during a save-as-prompt.
4. Open the project in the appropriate TIA Portal version. If a downgrade prompt appears (your TIA Portal version is older than the file), cancel and obtain a newer trial instead. Downgrading corrupts the project for the customer.
5. When the upgrade prompt appears (your TIA Portal version is newer), choose "Upgrade and open." Note the upgrade in your evaluation report so the customer is aware their master has shifted forward by one major version.
6. Inventory the project: list CPU types, I/O modules, HMI panels, drives, safety devices, used libraries, and any vendor-specific function blocks. Cross-reference against the customer's BoM to confirm the scope of the quotation.
7. Print to PDF (File → Print → PDF printer) the program structure, the I/O list, the HMI screen list, and the network topology. These PDFs are the basis of the quotation response.

Verification Checklist Before Submitting the Quotation

• Project opens without errors. TIA Portal displays no red entries in the project tree; the "Go online" status icon is amber or green.
• Compile succeeds. Run a software compile (Project tree → right-click CPU → Compile → Software (rebuild all)). Zero errors; warnings are acceptable and must be listed in the quotation assumptions.
• Hardware catalog resolves. If the project uses SP (Service Pack) features newer than the installed TIA Portal, install the matching HSP (Hardware Support Package) before evaluating further.
• Library references resolve. Open the library management pane; all "missing" or "substituted" entries must be reconciled before the BoM is reliable.
• Safety blocks reviewed. If the project includes F-CPU blocks (F-runtime groups, F-I/O), confirm the F-signature status and re-validate manually. The trial tool will not perform a re-signature; that is the customer's responsibility on their side.
• HMI tags reconciled. Open the HMI tag table; if tags show a yellow exclamation mark (proxy not found), the PLC side has not been compiled. Recompile the PLC first, then the HMI.
• File checksum captured. Compute the SHA-256 of the file you reviewed and attach it to the quotation cover sheet so the customer can confirm you reviewed the same file at signature time.

Troubleshooting Matrix

Field-Proven Tips from Pre-Sales Workflows

Three patterns recur in pre-sales engineering teams that quote Siemens work regularly:

1. Maintain a long-lived TIA Portal VM. A Windows 11 virtual machine with TIA Portal V18 and V19 side-by-side (separate ALM stores, separate user profiles) is the lowest-friction setup. Snapshots before opening any customer file allow rapid rollback if a project upgrade is irreversible.
2. Use a separate download account. A free Siemens Support account is sufficient for the LOGO! demo. For TIA Portal trials, create the trial request from a generic engineering inbox ([email protected]) rather than a personal mailbox; this makes license reassignment to a colleague possible if you leave mid-evaluation.
3. Tag the file with the evaluation report. Drop a REVIEW_NOTES.md next to the customer file in the working folder. Document the TIA Portal version, the trial key, the upgrade decisions, and the SHA-256 hash. Future engineers (or future-you) will be able to reproduce the evaluation in six months when the customer comes back with "so about that quote."

FAQ