Why Use Open vs Proprietary Protocol in Your Building Automation System Integration

Communications Protocols

BACnet, MODBUS, and DALI  are examples of some common open communication protocols utilized in modern building systems. Compared to proprietary or closed protocols that employ vendor-specific languages, these open protocols facilitate interoperability across vendors to connect devices.       

Programming Software

Open protocol systems can integrate software platforms developed by many different equipment manufacturers. With such protocols, BAS platforms can be built to specifications that allow for interoperability and integration of new and existing components. However, there are cases in which a vendor might use an open communication protocol within proprietary programming tool. For BAS integration, open protocols means that the system can be programmed and operated without requiring manufacturer’s or vendor’s support.  

Choice of Products and Service Providers

One of the key drawbacks of proprietary protocols is the limited choice of equipment and upgrade options. You are committed to the same vendor for servicing and maintenance year after year until the system is replaced. This often means being locked into a vendor’s costly service plan with few or no competitive options. 

As open protocol BAS systems work with an endless array of equipment and software platforms and are easily serviced by any qualified technician. Installation, servicing, and upgrading can be performed by the vendor of your choice. Vendors will now compete for your business by providing good customer service, knowing you have options.  

Licensing

A building owner should have full license ownership and administrator control of the building automation system once it is installed. Closed protocol products are licensed to a single authorized dealer and forces building owners and other stakeholders to request service, support, and upgrades from the same dealer. In contrast, there are products available that allow multiple vendors and suppliers the ability to perform updates and provide support. This is instrumental in creating open architecture for BAS integration, improving scalability, and controlling costs.    

Customization

Open protocols utilized in an open software infrastructure helps developers customize building automation systems and create scalable, future-proof solutions. With proprietary  protocols and software, there is no such flexibility.