Micro Motion Burst coms
Hello, I’m an I/E tech and I’m having issues with a Micro Motion MVD 9739. We think we lost the Burst communication between MVD and the hart tri loop 333d.
The burst mode is set to Process variables/current.
Both the MVD and the tri loop have been changed.
The MVD is displaying correct density, flow, and Temp so the tube is not an issue.
The settings have been pulled and saved from both the MVD and the tri loop and dropped into the new units. They are direct replacements.
Using the Trex I can put the leads on the MDV hart comm terminals and find both addresses (0 for the MDV and 1 for the tri loop).
I am able to force a 4-20 output from the tri loop while hooked to the hart terminals on the MDV.
I can also hookup to the tri loop comm connection in the control panel (150’ away) and communicate to the MDV. However trying to simulate any of the variables from the MDV produces no output from the tri loop.
I hope this makes sense to someone. Any help is appreciated greatly.