Case
Hospitality Facility Project ：Zengcheng Hilton Hotel
Application of PLC Control Cabinets in Hotel Intelligent Systems
Core Application Scenarios
A. Energy Management System
Power Monitoring
Real-time monitoring of floor-by-floor power load (±0.5% accuracy)
Automatic backup power switching (<10s transfer time)
Typical configuration: Schneider Modicon M580 + smart meters (Modbus RTU protocol)
Lighting Control
Automatic luminance adjustment in lobbies/corridors (0-100% stepless dimming)
Card-activated power control in guest rooms
Protocols: DALI/KNX (via gateway to PLC)
B. HVAC Control
Chiller Plant Optimization
Automatic adjustment of chiller units based on occupancy rate
Chilled water supply/return temperature differential control (ΔT=5±0.3℃)
Guest Room VAV Control
Temperature/humidity sensors (±0.5℃/±3%RH accuracy)
3-speed fan coil + motorized valve coordination
C. Water Supply & Drainage
Constant Pressure Water Supply
Pressure control range 0.3-0.5MPa (PID-adjusted VFD)
Automatic standby pump activation during failures
Pool Water Treatment
Online residual chlorine monitoring (0.3-1.0ppm)
Automatic chemical dosing
- Special Function Implementation
A. Elevator Integration
Emergency recall during fire alarms (GB50016-2014 compliant)
Intelligent dispatching during peak hours
B. Security Integration
Access control status monitoring (500+ door contact signals)
CCTV system联动 (alarm-triggered video pop-up)
- Implementation Benefits
Energy Savings: 25-30% reduction in central HVAC consumption
Maintenance Efficiency: 60% faster fault response time
Guest Experience: Room temperature control precision improved to ±0.5℃