Siemens PLC vs Delta PLC in Roll Forming Machines

1. Overview of Both PLC Systems

What is a Siemens PLC?

Siemens PLCs (SIMATIC series) are high-end industrial control systems used in advanced automation environments worldwide.

Global industry leader in automation
Modular and scalable systems
Advanced control capabilities
Integrated with TIA Portal software

Typical use:

High-end roll forming lines
Automotive production
Smart factories
Fully automated systems

What is a Delta PLC?

Delta PLCs are cost-effective industrial controllers designed for reliable, mid-level automation.

Budget-friendly solutions
Compact and simple design
Easy to program and maintain
Widely used in machine automation

Typical use:

Standard roll forming machines
Roofing panel lines
Small to medium factories
Entry-level automation systems

2. Engineering Explanation

Siemens PLC Engineering

High processing speed
Advanced motion control
Large memory capacity
Full system integration (drives, HMI, SCADA)

Key Outcome:
Designed for complex, high-performance automation systems

Delta PLC Engineering

Standard processing capability
Basic motion control
Compact architecture
Simple integration

Key Outcome:
Designed for efficient, cost-effective machine control

3. Cost Comparison

This section compares both PLC systems across key cost factors.

Initial Cost

Siemens → High investment
Delta → Low to moderate cost

Programming & Setup Cost

Siemens → Higher (advanced systems)
Delta → Lower (simpler setup)

Maintenance Cost

Siemens → Higher but less frequent
Delta → Lower but may require more intervention

Total Cost of Ownership

Siemens → Lower long-term in large systems
Delta → Lower upfront for smaller operations

Key Insight

Siemens is a premium long-term investment, while Delta is a cost-effective short-term solution.

4. Performance & Processing Power

Siemens PLC

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

Delta PLC

Good for standard applications
Limited advanced processing
Suitable for repetitive tasks

Conclusion

Siemens delivers higher performance and capability, especially in complex roll forming lines.

5. Software & Programming

Siemens (TIA Portal)

Industry-standard platform
Advanced diagnostics and simulation
Integrated system (PLC + HMI + drives)
Supports Industry 4.0

Delta (WPLSoft / ISPSoft)

Simple and user-friendly
Faster learning curve
Limited advanced features

Conclusion

Siemens software is more powerful, Delta software is easier to use.

6. Communication & Integration

Siemens PLC

PROFINET, Ethernet, OPC UA, fieldbus systems
Seamless integration with full automation systems
Ideal for smart factories

Delta PLC

Modbus, Ethernet, basic protocols
Good for standalone machines
Limited large-system integration

Conclusion

Siemens is far superior for integration and large-scale automation.

7. Reliability & Industrial Use

Siemens PLC

Extremely high reliability
Used in critical industries
Long lifecycle support
Global service network

Delta PLC

Reliable for standard applications
Best for non-critical systems
Widely used in SMEs

Conclusion

Siemens is preferred for mission-critical production, Delta for general machine use.

8. Maintenance & Troubleshooting

Siemens PLC

Advanced diagnostics
Remote access capability
Requires skilled engineers

Delta PLC

Easier troubleshooting
Simple system structure
Lower skill requirement

9. Typical Roll Forming Applications

Siemens PLC Machines

High-speed lines (30–100+ m/min)
Multi-profile systems
Automated stackers & servo systems
Export-grade machines

Delta PLC Machines

Roofing panel machines
Trim and flashing lines
Entry-level roll forming machines
Budget-focused systems

10. Advantages and Disadvantages

Siemens PLC

Advantages

High performance
Advanced automation
Global support
Industry-standard system
Future-proof (Industry 4.0 ready)

Disadvantages

High cost
Requires skilled programming
Higher setup time

Delta PLC

Advantages

Low cost
Easy to use
Fast setup
Good for standard machines
Widely available

Disadvantages

Limited advanced features
Lower scalability
Less integration capability
Lower resale value

11. When to Choose Each Option

Choose Siemens PLC When:

Building high-end roll forming machines
Exporting to Europe/USA
Running automated production lines
Integrating multiple systems (servo, stacking, SCADA)

Example: Fully automated roofing panel line with stacker

Choose Delta PLC When:

Budget is limited
Producing standard profiles
Running simple production lines
Operating in SME environments

Example: Basic roofing sheet machine

12. Real Production Examples

Example 1: High-End Manufacturer

PLC: Siemens
Result: Fully automated, high-speed production

Example 2: Entry-Level Factory

PLC: Delta
Result: Low-cost, reliable production

Example 3: Upgrade Scenario

Upgrade: Delta → Siemens
Result: Improved automation, speed, and control

13. FAQ

Which PLC is better for roll forming machines?

Siemens is better for high-end systems, Delta is better for cost-effective machines.

Why do European buyers prefer Siemens?

Due to reliability, standards compliance, and integration capability.

Is Delta PLC reliable?

Yes, for standard and mid-level applications.

Does PLC choice affect machine price?

Yes — Siemens significantly increases machine cost.

Which should I choose?

Choose Siemens for performance and scalability, Delta for budget and simplicity.