Siemens vs Mitsubishi PLC Control Systems in Roll Forming Machines

1. Overview of Both PLC Systems

What is a Siemens PLC?

Siemens PLCs (SIMATIC series) are high-end industrial automation systems widely used in Europe and global large-scale manufacturing.

Global market leader in automation
Modular and scalable architecture
Advanced communication and integration
Designed for complex industrial systems

Typical use:

High-end roll forming lines
Automotive and heavy industry
Fully automated factories
Smart manufacturing systems

What is a Mitsubishi PLC?

Mitsubishi PLCs (MELSEC series) are high-performance, cost-effective control systems widely used in Asia and machine automation.

Strong presence in Asian markets
Known for precision and motion control
Compact and efficient design
Easier programming structure

Typical use:

Standard roll forming machines
Packaging and production lines
Electronics manufacturing
Mid-range automation systems

2. Engineering Explanation

Siemens PLC Engineering

High processing power
Advanced motion control and synchronization
Large memory and scalability
Strong system integration (HMI, drives, SCADA)

Key Outcome:
Designed for complex, large-scale, and highly integrated automation systems

Mitsubishi PLC Engineering

Fast and responsive control
Strong motion and positioning control
Efficient processing for machine automation
Compact system architecture

Key Outcome:
Designed for precise, efficient machine-level control

3. Cost Comparison

This section compares both systems across key cost factors.

Initial Cost

Siemens → High investment
Mitsubishi → Medium cost (more affordable)

Programming & Setup Cost

Siemens → Higher (advanced system engineering)
Mitsubishi → Lower (simpler programming structure)

Maintenance Cost

Siemens → Higher but less frequent
Mitsubishi → Moderate and easier to maintain

Total Cost of Ownership

Siemens → Better for large-scale long-term systems
Mitsubishi → Better for cost-efficient machine setups

Key Insight

Siemens is a premium industrial solution, while Mitsubishi offers a strong balance of performance and cost.

4. Performance & Processing Power

Siemens PLC

High-speed processing
Handles complex automation logic
Multi-axis synchronization
Advanced diagnostics

Mitsubishi PLC

Fast response times
Excellent for motion control
Strong positioning accuracy
Optimized for machine automation

Conclusion

Siemens is better for complex systems, Mitsubishi excels in machine-level precision control.

5. Software & Programming

Siemens (TIA Portal)

Industry-standard platform
Full system integration
Advanced diagnostics and simulation
Supports Industry 4.0

Mitsubishi (GX Works / iQ Works)

Easier to learn
Faster setup
Strong for motion applications
Less advanced integration

Conclusion

Siemens software is more powerful, Mitsubishi is more user-friendly.

6. Communication & Integration

Siemens PLC

PROFINET, PROFIBUS, OPC UA
Seamless integration across full factory systems
Strong in process automation

Mitsubishi PLC

MELSEC network, Modbus, Ethernet
Good machine-level communication
Less extensive ecosystem

Conclusion

Siemens dominates in factory-wide integration, Mitsubishi is strong in standalone machines.

7. Reliability & Industrial Use

Siemens PLC

Extremely reliable
Used in critical industries
Long lifecycle support
Global service network

Mitsubishi PLC

Highly reliable in machine automation
Widely used in Asia
Strong performance in OEM machinery

Conclusion

Both are reliable — Siemens for large systems, Mitsubishi for machine automation.

8. Maintenance & Troubleshooting

Siemens PLC

Advanced diagnostics tools
Remote monitoring capability
Requires skilled engineers

Mitsubishi PLC

Easier troubleshooting
Simpler system architecture
Lower skill requirement

9. Typical Roll Forming Applications

Siemens PLC Systems

High-speed production lines
Multi-profile systems
Automated stacking and handling
Export-grade machines (EU/USA)

Mitsubishi PLC Systems

Standard roll forming machines
Servo-driven punching systems
Medium-speed production lines
Cost-efficient factory setups

10. Advantages and Disadvantages

Siemens PLC

Advantages

High performance
Advanced integration
Global support
Industry-standard platform
Future-ready (Industry 4.0)

Disadvantages

High cost
Complex programming
Requires skilled engineers

Mitsubishi PLC

Advantages

Cost-effective
Easy to program
Strong motion control
Fast response
Efficient machine automation

Disadvantages

Less advanced integration
Limited ecosystem vs Siemens
Lower global standard (outside Asia)

11. When to Choose Each Option

Choose Siemens PLC When:

Exporting machines to Europe or USA
Running high-end automated lines
Integrating multiple systems (HMI, SCADA, servo)
Building premium machines

Example: Fully automated roll forming line with stacking system

Choose Mitsubishi PLC When:

Building cost-effective machines
Running standard production lines
Focusing on motion control (servo/punching)
Operating in Asian or OEM markets

Example: Mid-range roll forming machine with servo punching

12. Real Production Examples

Example 1: European Export Machine

PLC: Siemens
Result: High-end automation and integration

Example 2: OEM Machine Builder

PLC: Mitsubishi
Result: Cost-effective and reliable machine production

Example 3: Upgrade Scenario

Upgrade: Mitsubishi → Siemens
Result: Improved automation and system integration

13. FAQ

Which PLC is better for roll forming machines?

Siemens for high-end automation, Mitsubishi for cost-effective machine control.

Why is Siemens more expensive?

Due to advanced features, integration, and global support.

Is Mitsubishi PLC reliable?

Yes — especially for machine-level automation.

Which is easier to program?

Mitsubishi is generally easier for beginners.

Which should I choose?

Choose Siemens for advanced automation and export markets, Mitsubishi for cost-effective production systems.