Download STEP 7 V5.7 SP3 / Professional 2021 SR3

 

STEP 7 V5.7 SP3 / Professional 2021 SR3: Features, Requirements & Official Trial Download

For engineers still supporting S7-300 and S7-400 PLCs, STEP 7 Classic remains the go-to programming environment. This guide covers what's in STEP 7 V5.7 SP3 / Professional 2021 SR3, its system requirements, and how to get the official trial directly from Siemens.

What Is STEP 7 V5.7 / Professional 2021 SR3?

STEP 7 (SIMATIC Manager) is Siemens' classic programming software for the S7-300 and S7-400 PLC families. Despite the rise of TIA Portal for newer controllers, STEP 7 Classic is still actively maintained for the large installed base of S7-300/400 systems still running in the field — and Siemens continues to release service packs and updates for it.

It's worth noting there are two products both referred to as "STEP 7 Professional":

• STEP 7 Classic (V5.x) — the standalone SIMATIC Manager environment for S7-300/400
• SIMATIC STEP 7 Professional (TIA Portal) — the integrated STEP 7 found inside TIA Portal for S7-1200/1500

This article covers the Classic version, V5.7 SP3 / Professional 2021 SR3.

Key Features

• Multiple programming languages: Ladder Diagram (LAD), Function Block Diagram (FBD), and Structured Control Language (SCL)
• S7-GRAPH for sequential control programming
• S7-PDIAG for process diagnostics
• Simulation support to test and debug logic before deploying to hardware
• Improved, simplified interface compared to earlier V5.x releases, making navigation more straightforward
• Windows 10/11 compatibility, keeping a legacy tool usable on modern hardware

Supported Hardware

STEP 7 V5.7 SP3 / Professional 2021 SR3 is built for:

• SIMATIC S7-300 PLCs
• SIMATIC S7-400 PLCs

If you're working with newer S7-1200 or S7-1500 controllers, you'll want TIA Portal instead — STEP 7 Classic does not support those platforms.

System Requirements

• Operating System: Windows 10 or Windows 11 (64-bit)
• Processor: Intel Core i5 or equivalent
• Memory: 8 GB RAM minimum
• Storage: Sufficient free SSD space for the install plus project files
• License: Requires a valid Siemens license via Automation License Manager (trial licenses are time-limited)

Where to Download the Official Trial

STEP 7 is licensed engineering software. Siemens makes trial versions available through its Industry Online Support (SIOS) portal — this is the only source that guarantees a clean installer with proper update paths and support access.

• STEP 7 V5.7 SP3 / SIMATIC S7-SCL V5.7 SP3 — Trial Download: https://support.industry.siemens.com/cs/document/109973519/simatic-step-7-v5-7-sp3-simatic-s7-scl-v5-7-sp3-trial-download

To access it:

1. Go to the link above and sign in with (or create) a free Siemens Industry Online Support account
2. Confirm your region/language on the document page — availability can vary slightly by country
3. Download the trial installer package and follow the on-screen licensing steps in Automation License Manager

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Final Thoughts

STEP 7 V5.7 SP3 / Professional 2021 SR3 keeps S7-300/400 projects running on current operating systems without forcing a migration to TIA Portal. Because it's licensed software tied to industrial control systems, always get it through Siemens' official Industry Online Support portal — this is the only way to ensure you're getting genuine updates, valid licensing, and access to Siemens technical support if something goes wrong.