We installed a couple E+H TMT82 temperature transmitters with HART capability, in place of some DIN rail transmitters that were not HART capable. The Mux is functioning and monitoring data from a number of devices that are connected to the ESD system (which is not HART capable). The 4-20 mA signal from the transmitters is correct and I can connect to them using a TREX communicator. I have tried numerous Scans - new, all, etc., rebuilt hierarchy, removed & reseated the MUX card (which comes back okay), tried the "rebuild loop" method and tried a few other selections like "HART command". So far it does not see the transmitters and does not appear that it even looks at the slot in question, whether "Scan all" or "Scan new".
Please comment if you have any thoughts or suggestions for what might allow the Mux to "see" the new transmitters. This is happening on two separate Mux cards / FTA's - same issue.
In reply to Jonas Berge:
Thanks Jonas - I'm connecting with a TREX connected directly to the dropping resistor on the FTA, and I get a HART connection / communications with no issues.
As I watch the "scan" progress it seems like the Mux is only looking at the terminations where it already found a HART device - it cycles 3.2.1 . . . 3.2.2 . . .etc. but stops short of scanning any other channels beyond the 7 displayed in AMS (there are 32 total analog inputs per Mux).
I will check with P+F whether a firmware update is recommended. These modules are at least a decade old.
Update: Tried installing the 2700 DTM, but AMS's DTM Catalog Manager doesn't find it . . .
In reply to John Rezabek:
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