Siemens SICAR Standard for Automotive Industry Explained
The automotive industry demands precision, speed, and flexibility. To meet these challenges, Siemens developed the SICAR (Siemens Car) standard—a modular, scalable automation framework tailored for automotive production lines. It covers everything from body shop to final assembly, integrating hardware, software, and safety in a unified architecture.
SICAR is not just a set of guidelines; it’s a proven methodology that reduces engineering time, ensures consistent quality, and simplifies maintenance. Whether you’re designing a new line or upgrading an existing one, understanding SICAR can give you a competitive edge.
What Exactly is the Siemens SICAR Standard?
SICAR stands for SIemens Car. It is a comprehensive automation standard developed by Siemens specifically for the automotive sector. At its core, SICAR provides pre-defined function blocks, faceplates, and communication structures that run on Siemens controllers like the SIMATIC S7-1500 and HMI panels. This standardization allows different teams and suppliers to work cohesively, reducing integration headaches.
The standard is built on the Totally Integrated Automation (TIA) Portal, which means all components—PLC, HMI, drives, and networking—are configured and programmed from a single engineering environment. This integration is key to achieving high-speed, deterministic control required in automotive manufacturing.
Key Modules of the SICAR Standard
SICAR is divided into several functional modules, each addressing a specific area of production. These modules can be combined and scaled according to the plant’s needs.
| Module | Function | Typical Hardware |
|---|---|---|
| SICAR Base | Core functions: mode management, alarm handling, safety interlocks | SIMATIC S7-1500F, ET 200SP |
| SICAR Conveyor | Control of roller beds, skid conveyors, and EMS systems | SINAMICS G120, SIMOGEAR |
| SICAR Robot | Standardized interfaces for robot cells (welding, handling) | SIMATIC Robot Library, PROFINET |
| SICAR Process | Process control for paint shop, sealing, and gluing | SIMATIC PCS 7, S7-1500 |
| SICAR MES | Integration with Manufacturing Execution Systems for traceability | SIMATIC IT, Opcenter |
Each module includes ready-to-use function blocks (FBs) and faceplates, drastically cutting down programming time. For example, a conveyor FB might already include logic for start/stop, fault detection, and energy-saving modes.
Benefits of Adopting SICAR in Automotive Plants
Why do major automakers and line builders choose SICAR? The advantages are tangible:
- ✓ Reduced Engineering Time: Pre-engineered templates and libraries can cut development time by up to 40%, allowing faster time-to-market.
- ✓ Consistent Quality: Standardized code means fewer errors and uniform behavior across different line sections and plants.
- ✓ Simplified Maintenance: Diagnostic functions and standardized faceplates make troubleshooting faster. Maintenance staff can quickly identify issues without deciphering custom code.
- ✓ Scalability: From a single cell to an entire plant, SICAR modules can be combined and expanded as production needs grow.
- ✓ Safety Integrated: SICAR incorporates failsafe functions compliant with ISO 13849 and IEC 62061, ensuring operator safety without extra engineering effort.
How SICAR Integrates with the Industrial Automation Pyramid
SICAR aligns perfectly with the traditional automation pyramid, from field level to enterprise. At the base, devices like sensors and actuators connect via PROFINET. The control level uses S7-1500 PLCs running SICAR blocks. SCADA systems like WinCC provide visualization, while MES modules handle production orders and traceability. At the top, ERP systems like SAP can exchange data through standard interfaces.
This vertical integration ensures that data flows seamlessly from the shop floor to the top floor, enabling real-time decision-making and Industry 4.0 applications.
Getting Started with SICAR: Training and Resources
Implementing SICAR requires a solid understanding of TIA Portal and the standard’s libraries. Siemens offers dedicated training courses (e.g., TIA-SICAR) that cover configuration, programming, and diagnostics. Additionally, the SICAR documentation package includes detailed manuals, application examples, and test projects.
Many system integrators and automotive OEMs have already adopted SICAR, creating a community of practice where knowledge is shared. Online forums and Siemens’ technical support provide further assistance.
SICAR vs. Custom Automation: A Comparison
| Aspect | SICAR Standard | Custom Solution |
|---|---|---|
| Engineering Effort | Low (reuse of libraries) | High (develop from scratch) |
| Flexibility | High within defined framework | Unlimited but costly |
| Maintenance | Easy (standard diagnostics) | Complex (unique code) |
| Scalability | Built-in | Requires redesign |
| Initial Cost | License fees + training | Lower upfront, higher long-term |
For most automotive applications, the long-term savings and reliability of SICAR outweigh the initial investment.
Real-World Application: Body Shop Example
Consider a typical body shop with multiple robot cells for spot welding. Using SICAR, each cell is controlled by a S7-1500F PLC with the SICAR Robot module. The module provides standardized interfaces for robot controllers (e.g., from KUKA or ABB) via PROFINET. Safety functions like area monitoring and emergency stops are pre-configured. The HMI uses SICAR faceplates, so operators see a consistent interface across all cells. Production data is sent to the MES for quality tracking.
This setup reduces commissioning time by weeks and ensures that any technician familiar with SICAR can support the line.
Future Trends: SICAR and Digitalization
As automotive manufacturing moves toward Industry 4.0, SICAR is evolving. Integration with cloud platforms like MindSphere enables predictive maintenance and big data analytics. Digital twins of production lines can be simulated using SICAR libraries before physical deployment. The standard also supports edge computing for real-time data processing at the machine level.
Staying updated with the latest SICAR releases ensures your plant remains competitive in an era of rapid technological change.
