Posts

Showing posts with the label Example

HART Protocol Implemention and Example

Image
HART PROTOCOL Smart transmitters are ones that are capable of self-monitoring, using digital electronics internally. It doesn't stand for anything, just a term "smart". Some smart transmitters can communicate digitally, and there have been many different protocols used over the years since Honeywell first came to market in the early 80's with their pressure transmitter line. The idea is that there is a much easier and better way to calibrate, configure and monitor the signal using a smart device and keypad or handheld versus an analog type. I remember the days of Zero and Span pots and the interaction between the two, not to mention the drift that occurred over time and with temperature swings! Horrible to have to work with! Kept many instrument techs employed, with lots of overtime, however! The term and technology of HART was originally invented by Rosemount in the mid-80's as a response to Honeywell's first offering, and was also a proprietary standard. The...

Case study implementation and example of CAN BUS

Image
Aim:  Case study, implementation and example of CAN BUS 1. What is CAN? CAN,which stands for Controller Area Network, is the serial communication protocol internationally standardized by ISO *1. The automobile industry has hitherto witnessed the advent of various electronic control systems that have been developed in pursuit of safety, comfort, pollution prevention, and low cost. These control systems, however, presented a drawback in that since the communication data types, required reliability, etc. Differed between each system, they were configured in multiple bus lines, resulting in increased wire harnesses. Therefore, the need arose for reducing the number of wire harnesses, transferring large amounts of data at high speed via multiple LANs, and so on. To meet the need, BOSCH, an electrical equipment manufacturer in Germany, developed CAN in 1986 as a communication protocol for automotives. Thereafter, CAN was standardized in ISO 11898 and ISO 11519, establishing itself as the...