Ethernet users make known their digital protocol preferences


May 02, 2006

Users of microprocessor-based, single-loop (MP-SL) industrial temperature controllers were asked what types of digital communication interfaces were included on the MP-SL controllers they purchased in 2005, and which they expect in five years.

Digital Protocol Preferences
(Click to enlarge)

Venture Development Corp. reports that, among those using Ethernet, by far the largest share uses Ethernet/IP. However, the percentage using this protocol is expected to decline. Respondents expect only a 2% gain in use of Modbus TCP, the second most popular among the survey respondents. Among other Ethernet application-layer protocols, the most popular with these users are Profinet and HSE. A slight decline in Profinet’s popularity is expected, while an increase is predicted for HSE, which is the Foundation fieldbus high-speed controller-linking network.