IoT Guide

Remote Building Management System (BMS) Monitoring: Cloud, HVAC, Lighting, and Meters via BACnet/Modbus/KNX

Cloud-based building management system: remote monitoring of HVAC, lighting, access control, and energy meters via BACnet, Modbus, and KNX.

Quick answer
The Remote Building Management System Monitoring (Cloud-Based Building Management) centralizes the control of the CVC, from thelighting, some access and some energy meters via the protocols BACnet, Modbus, and KNX through an interface accessible from any browser. Operators of multi-site commercial buildings reduce their energy consumption by 15 to 25 percent and cut on-site trips by two-thirds.

What is remote building management system (BMS) monitoring?​

Building Automation (BA) encompasses all the systems that monitor and control a building’s technical equipment: heating, ventilation, and air conditioning (HVAC), lighting, access control, energy meters, and other electrical equipment. Traditionally, BMS was accessible only from a local monitoring station within the building.

Cloud-based building management systems extend this monitoring beyond the building’s walls: an IoT gateway collects data from field devices (via BACnet, Modbus, or KNX) and transmits it to a cloud platform accessible from any browser or mobile app. This development is particularly relevant for managers of multi-site real estate portfolios who wish to centralize their operations.

Supported Protocols and Compatible Devices​

BACnet (Building Automation and Control Network)

  • Air handling unit (AHU) controllers
  • Chilled water and hot water production units
  • Fire detection systems (certain manufacturers)
  • BACnet/IP energy meters
  • Building automation controllers (Siemens, Schneider, Honeywell, Sauter, Johnson Controls)

Modbus RTU/TCP

  • Electricity, water, gas, and heat meters
  • Variable-frequency drives (pumps, fans)
  • Networked electrical panels
  • Heating and cooling controllers
  • UPS systems

KNX

  • Lighting and blind actuators
  • Room thermostats
  • Presence and light sensors
  • Controlled outlets
  • Multifunction interfaces

Features of a Multi-Site Cloud-Based Building Management System​

The monitoring platform provides a unified interface for the entire fleet:

  • Interactive map: overview of all sites with general status (green/orange/red).
  • Customizable dashboards: energy consumption by source, temperature by zone, occupancy rate.
  • Historical Data and Trends: 24-hour, 7-day, 30-day, and 12-month graphs with year-over-year comparisons.
  • Alarm Management: centralization, prioritization, escalation, and acknowledgment.
  • Automatic reports: daily summary via email, monthly OPERAT report.
  • Remote control: modification of temperature setpoints, time slots, and scenarios from the platform.

Integration with Existing Systems​

Cloud-based building management systems do not replace existing systems; they enhance them:

  • Existing Building Automation System (BAS): The gateway reads BACnet/Modbus data from the existing PLC without modifying its programming.
  • SCADA Monitoring: Real-time data export to the group’s SCADA system via MQTT or REST API.
  • Facility Management: Integration with ticketing tools (Maximo, CMMS) for the automatic creation of work orders.
  • Energy Accounting: Data export to ISO 50001 compliance tracking platforms.

Action Plan for Deploying a Cloud-Based Building Management System​

  1. Audit: Inventory of existing equipment and protocols; identification of data collection points.
  2. Architecture: Sizing of gateways; network plan; definition of priority measurement points.
  3. Installation: Installation of gateways, connection to fieldbuses, and address configuration.
  4. Commissioning: configuring the platform, defining thresholds and alerts, training operators.
  5. Optimization: analyzing the first few weeks of data, adjusting setpoints and time windows.

Frequently Asked Questions

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