Building Management Systems – PROGRAMMABLE LOGIC CONTROLLER (PLC) vs DIRECT DIGITAL CONTROL(DDC)
Notes:
Programmable Logic Controller (PLC)
A PLC reads and processes sensor data, then uses it to trigger an output based on a pre-programmed framework. PLCs are considered a customizable control solution adaptable to just about any purpose.
PLCs are a part of the Industrial Internet of Things (IIoT) chain and are most often used in industrial buildings. They can use a web browser to communicate data. PLCs use SQL to connect to databases or MQTT to connect to the cloud. A standard messaging protocol, MQTT, is widely used in various industries such as manufacturing, oil and gas, and more because of its high-functionality and bandwidth efficiency.
Direct Digital Control (DDC)
DDC enables a single control point for a building’s various systems. DDCs are frequently used in HVAC, lighting, alarm systems, or automating an entire building’s system by controlling other electrical and mechanical.
DDC systems can improve building efficiency. Because DDCs are programmable, building operators can pre-program building functions such as the temperature to meet specific criteria, increasing efficiency while maintaining occupancy comfort.
DDC technology allows for remote facility control monitoring. Because DDC provides real-time data, facility managers can adjust HVAC settings, temperature, lighting, humidity, and more from any internet-connected location. Real-time equipment failure or service interruption alerts allow for quicker response and resolution of minor concerns before they become significant issues. Building supervisors no longer have to physically go to the site location to begin repairs.
#DDC #PLC #BMS
