HART 7 is the latest HART Communication Protocol. There is a focus on WirelessHART, but this does not mean that the protocol does not benefit wired devices.
Read what Ron Helson (executive director of the HART Communication Foundation) has to say about HART 7 here.
Note that the HART 7 protocol introduces new functionality along with those found in both HART 6 (like support for longer tags, additional Common Practice Commands and faster digital communications) and the currently most adopted HART 5 protocols.
Keeping up with all this requires that your device can communicate with the host via HART 7; the latest iteration of the DVC6200 Digital Valve Controller is one such device. Along with HART 7 compatibility, we have also added an Auto Calibration button, a Pushbutton to manipulate instrument protection, and an option for 4-20mA Position Transmitter or 0/1A Limit Switch.
For more details on the DVC6200 Digital Valve Controller, do check out the bulletins here.
Anyone who has a personal experience or know of users benefiting from using HART 7 with valve positioners, do chip in and let us know your thoughts.
Hi Alex, does that mean that any HART7 devices can be installed out of the box into any existing host seamlessly?
In reply to Soon Peng Goh:
Base on my knowledge, a HART 7 device will require a HART 7 host to effectively communicate via HART protocol. However, do note that a HART 5 or 6 device should be able to effectively communicate with a HART 7 host. The good news is that in the case of the FIELDVUE DVC6200 with HART 7 compatibility, the same device can be easily switched between HART 7 and HART 5.
Just thought I will add that Rosemount has an overview on HART revisions here and HART readiness here.
In reply to Alex Quah:
I can confirm that HART5 and HART6 systems are not compatible with HART7 devices. HART7 devices require HART7 systems. This applies to handheld communicators and laptop software as well.
Simple "hosts" like smart signal conditioners such as the Rosemount 333 "tri-loop" used to convert HART signals such as position feedback to 4-20 mA don't care about HART version and works with HART5, HART6, and HART7 devices.
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