Poll for HART parameters in Freelance
I am searching a solution on how to poll the DTM parameters of an intelligent field device over HART (4-20mA) on a Freelance AC800F controller with S800 IO
After configuring the hardware lay-out, I am now able to access all parameters through the DTM in the hardware configuration. The next step would to poll the parameters.
This is my set-up:
----------AI845 (HART compatible AI)
----------------TTF300 (HART enabled Temperature transmitter)
Who can help me?
Voted best answer
How to do it is described in the Engineering Manual for Communication and Fieldbusses,
Section 2 PROFIBUS, Chapter "Commissioning PROFIBUS Objects", subchapter "Parameterizing the HART Object, GSD based / HART communication through S800".
Though it says 'GSD based' it describes DPV1 parameterizing and should also work when using a DTM. As a result the parameters would be available in DigiVis or the Freelance OPC server, not in the controller.
Unfortunately the HART passthrough of AI/AO 845 is different from that of AI/AO 895, for which this feature has been developed. So it might not work with AI 845.