The organization is also maintaining the more recent (2009) HART-IP IP-enabled version of the HART field communication protocol and just launched HART-IP Developer Kit whose hardware is comprised of a Raspberry Pi 3B+ SBC and off-the-shelf add-on boards mounted on a DIN Rail mount.
List of all hardware components:
- Raspberry Pi 3B+ SBC
- DSLRKIT Power Over Ethernet PoE HAT (around $20 on Aliexpress)
- Waveshare Raspberry Pi High-Precision AD/DA (about $30)
- DINrPlate DIN Rail Mount.
- MicroSD card
On the software side, the system runs Ubuntu MATE 18.04 64-bit preloaded on the MicroSD card with two software module:
- The HART-IP Server (hipserver) takes care of all HART-IP specific functions plus manages client subscriptions. The client subscriptions allow the hipserver to push the process and status data to client applications.
- The Flow Device Application (hipflowapp) implements a complete flowmeter with data going through the AD/DA board, and provides an example of a complete HART-enabled field device.
Both software components can be found on Github, and documentation on the company’s support website.
The actual network topology in the field is a bit more complicated with gateways, multiple field devices, a firewall, a “historian systems”, and a management computer.
The company also explains the advantage of HART-IP over competing protocols such as MODBUS RTU:
Since the application layer is the same for HART field devices as HART-IP, time-consuming and error-prone data mapping required by MODBUS RTU is eliminated.
The HART-IP developer kit may eventually be updated by replacing the PoE module by a 2-wire Ethernet-APLif such component becomes available. There will also be updates with FieldCommGroup’s OPC UA-centric Process Automation Device Information Model (PA-DIM) for interoperability with OPC UA based enterprise applications, and support for JSON and XML basedDeviceInfofiles for use with IIoTedge gateway solutions.
The hardware used for the kit costs around $100, so you’d be mostly paying for the software and the 4 hours of included technical support, as the HART-IP developer kit goes for $995 for members of FieldComm Group, and $1,495 for non-members.
Via LinuxGizmos and EENews
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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Hart is usually used in process automation and mostly in a price range far above the hobbyist’s capabilities.
I worked around the millennium for endress + hauser you could buy one or two compact cars for the price of a flow meter pre sales organisation mark up…
Definitely quality products developed by proud engineers and manufactured in house. That was a good time.