Cost-Effective Host Intelligence: Rapidly Integrating Color Screen Control via RS485 and HBS Protocol

Understanding Modbus-RTU and HBS in HVAC Applications

Two protocols dominate wired serial communication in HVAC:

• Modbus-RTU: Widely used for industrial communication, offering robustness, simplicity, and deterministic performance.
• HBS Protocol: Specifically designed for building automation, optimizing HVAC-specific commands, error handling, and control logic.

Integrating these protocols ensures the controller can understand host commands, synchronize real-time feedback, and manage local display operations efficiently.

High-Efficiency Collaboration: Host Protocol + Controller Adaptation

The fastest way to achieve intelligent control without redesigning the entire system is a collaborative protocol adaptation model:

• Host Manufacturer Provides Protocol Specification: Including registers, command sets, error codes, and response timing.
• Controller Supplier Implements Driver and Stack: Ensuring stable serial communication, proper parsing, and hardware abstraction.
• Rapid Validation and Deployment: Through iterative testing, debugging, and ESD/EMC checks.

This model minimizes integration errors, reduces development time, and allows low-cost deployment while maintaining high reliability.

Key Technical Considerations