The challenge: a critical S5 PLC, at altitude, with no current tools
The observatory runs a system controlled by a Siemens SIMATIC S5 PLC located on the mountain, in a cold, hard-to-reach area. Siemens no longer supports this platform, and the engineering team had no current tool to connect to the PLC, back up its program or troubleshoot faults from computers running current Windows.
A critical milestone was also approaching: the recoating of the primary mirror. It wasn't the time to replace the PLC. The priority was to keep the system running safely and under the local team's control.
The solution: regain control before migrating
Grupo Salba proposed a phased strategy. First, regain full control of the existing S5 system; then plan the migration with real information and without pressure. In this first stage we delivered:
- IBHsoftec S5 for Windows® software: STEP 5-compatible, it lets you program, monitor and diagnose S5 PLCs from current Windows without modifying the original program. Supports STL (AWL), LAD (KOP) and FBD (FUP).
- IBHsoftec USB-S5 communication cable: direct connection between a modern laptop and the PLC.
- On-site implementation, on the mountain.
On-site work
- Software installation and configuration
- Communication testing between the software and the S5 PLC
- Online review of the PLC program
- Full backup of the program and configuration
- Program analysis
- Training for the observatory's technical team
Results
- Complete backup of the S5 PLC program and configuration.
- Online diagnostics from modern equipment, with status display and CPU diagnostics.
- Self-sufficient local team, trained to handle faults and make changes.
- Operational continuity through a critical period, without touching the process.
- Technical foundation for migration: with the program backed up and analyzed, the move to a current platform can be planned precisely.
A second life cycle for the S5 PLC
Migration doesn't always mean replacing everything at once. By restoring access, backup and diagnostics, the S5 PLC gained a second service life. The client could prioritize its operation and decide when to take the next step.
For the full migration methodology we apply in the following stages, see our article Migrating legacy PLCs and obsolete SCADA.
Siemens S5 PLC FAQ
Can a Siemens S5 PLC be programmed from Windows 10 or 11?
Yes. With IBHsoftec S5 for Windows and a USB-S5 adapter you can program, monitor, diagnose and back up an S5 PLC from a modern Windows laptop, without modifying the original program.
Do I have to replace my S5 PLC right away?
No. A phased migration lets you first back up and document the system, keep it running, and then plan the move to Siemens S7 at the right time.
What is the first step with an S5 PLC still in operation?
Get a complete, verified backup of the program and configuration, and a current tool to connect to it and diagnose it.
Still running Siemens S5 PLCs?
Grupo Salba helps you regain control of your system and plan a safe, phased migration without stopping production.
Contact us: info@gruposalba.com · +56 9 7528 1652
Ask about my S5 PLC →S5 for Windows® is a registered trademark of IBHsoftec GmbH. SIMATIC, STEP 5 and S7 are registered trademarks of Siemens AG.