HART rev 6.0, said to be the first major enhancement to the HART (Highway Addressable Remote Transducer) protocol in seven years, is well underway, according to the HART Communication Foundation (HCF).
Ron Helson, HCF director, says: `There will be no revolutionary changes’. All enhancements will be backwards compatible. Upgrades, however, are to include expanded engineering units codes, longer device tags, further support for series connection of HART field devices, fast digital comms on the 4-20mA link and new common practice commands supporting sensor trim, PID in field devices and valves/actuators.
* The Htest and Analys software tools, currently running under DOS, are being upgraded for Windows NT – due Spring `98.