The most commonly used Programmable Logic Controllers (PLCs) vary depending on the industry, application, and region. However, several PLC brands and models are widely recognized and frequently used across various sectors. Here are some of the most popular ones:
### 1. **Siemens**
- **Series**: **SIMATIC S7**
- **Details**: Siemens' SIMATIC S7 series is one of the most widely used PLCs globally, especially in Europe and Asia. The S7-1200, S7-1500, and S7-300/400 are popular models, known for their reliability, flexibility, and integration with other Siemens automation products.
### 2. **Allen-Bradley (Rockwell Automation)**
- **Series**: **ControlLogix and CompactLogix**
- **Details**: Allen-Bradley is a leading PLC brand in North America. The ControlLogix series is used in large, complex automation systems, while the CompactLogix series is more suited for medium-sized applications. Both offer advanced features and are integrated into Rockwell Automation's broader control system.
### 3. **Mitsubishi Electric**
- **Series**: **MELSEC**
- **Details**: Mitsubishi's MELSEC series, especially the Q and iQ-R series, is widely used in Japan and other parts of Asia. They are known for their robustness, ease of programming, and wide range of compatible modules.
### 4. **Schneider Electric**
- **Series**: **Modicon**
- **Details**: Schneider Electric's Modicon PLCs, especially the M340 and M580 series, are popular in Europe and other regions. They are known for their reliability, scalability, and integration into Schneider Electric's EcoStruxure platform.
### 5. **Omron**
- **Series**: **Sysmac**
- **Details**: Omron’s Sysmac PLCs, such as the NJ and NX series, are widely used in manufacturing, especially in Japan and Southeast Asia. They are appreciated for their precision, speed, and integrated motion control capabilities.
### 6. **ABB**
- **Series**: **AC500**
- **Details**: ABB's AC500 series is a well-known PLC in industries that require high reliability and flexibility, such as oil & gas, water treatment, and energy. ABB is recognized for its global presence and strong support network.
### 7. **Honeywell**
- **Series**: **HC900**
- **Details**: Honeywell’s HC900 series is used in process automation, particularly in industries like chemical processing, power generation, and pharmaceuticals. It is valued for its process control features and integration with Honeywell's DCS systems.
### 8. **Beckhoff**
- **Series**: **CX Series**
- **Details**: Beckhoff's PLCs, such as the CX series, are known for their integration with PC-based control systems. They are popular in industries that require high-performance automation with advanced motion control and IoT capabilities.
### Key Factors in Choosing a PLC:
- **Industry**: Some industries have preferred brands based on historical use, support, and compatibility.
- **Application**: The complexity of the control system, such as the need for advanced motion control, high-speed processing, or safety features, can influence the choice of PLC.
- **Geography**: Regional availability, support, and brand recognition can affect the choice of PLC.
In summary, Siemens SIMATIC S7 and Allen-Bradley ControlLogix/CompactLogix are among the most commonly used PLCs globally, but the best choice depends on the specific application and regional preferences.