Modbus RTU verses Modbus TCP/IP: What’s the Difference?

-Robert Frohock, Danbury, CT See also: “I know what Modbus is, but what is BACnet?” Modbus Protocol is a messaging structure developed by Modicon. It is used to establish master-slave/client-server communication between devices. Modbus has a lot of protocol options. But the two used most are Modbus RTU (Remote Terminal Unit), serial (RS-232 or RS-485) protocol or Modbus […]

Preferred Presents at 2021 ASPE

Lee Carnahan and Len Swihart will present at the 2021 ASPE Tech Symposium Two members of Preferred’s industry-leading team of product specialists have been selected to present at the 2021 ASPE (American Society of Plumbing Engineers) Tech Symposium, which will be held in San Diego in September. This conference is focused on the plumbing industry, and it will […]

Boiler System 101: The Advantages of Full System Integration

Danbury, CT – A boiler system functions as a critical component to the continuous operation of a facility.  It is important to maintain safe, reliable, and efficient operation while minimizing any downtime of the boiler system to prevent disruption of operation and significant loss. A boiler system consists of many sub-systems working in harmony – the boiler, the burner and its controls, boiler […]

Automatic, Variable Ratio, Firing of a Blend of “Free” and Purchased Fuels

-Peter Lavelle, Danbury CT “Free” fuels are available from many processes: Digester Gas from wastewater treatment plants, Bio-Gas from agricultural and food processing plant waste, Hydrogen from chemical plants, Off-Gases from a Refinery, etc. The Challenge Firing these “free” fuels in a boiler, process heater, or engine-generator significantly reduces operating costs and can significantly reduce greenhouse gas emissions. […]