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We have several Endress+Hauser mass flow meters. Model is 83F40.
The AI signal is splitted to DCS and SIS.
Spliiter model: KFD2-STC4-1.2O-3 from Pepperl+Fuchs
All HART signals polled to the DCS appears unstable. The communication fluctuates between bad and good every few seconds.
A communication is easily established when connecting the HART communicator to anywhere at the right side of the AI splitter.
But connecting the HART communicator to anywhere at the left side of the AI splitter gives unstable connection. Eg. device not found.
I also tried putting at 250 ohm resistor at position * (see attached loop drawing), but no improvement.
<b>Moderator's Note:</b> Control.com does not support attachments. For people to see drawings, post it to a download site and put the url in your message.
Anyone out there know what the issue might be?
Thank you.
The AI signal is splitted to DCS and SIS.
Spliiter model: KFD2-STC4-1.2O-3 from Pepperl+Fuchs
All HART signals polled to the DCS appears unstable. The communication fluctuates between bad and good every few seconds.
A communication is easily established when connecting the HART communicator to anywhere at the right side of the AI splitter.
But connecting the HART communicator to anywhere at the left side of the AI splitter gives unstable connection. Eg. device not found.
I also tried putting at 250 ohm resistor at position * (see attached loop drawing), but no improvement.
<b>Moderator's Note:</b> Control.com does not support attachments. For people to see drawings, post it to a download site and put the url in your message.
Anyone out there know what the issue might be?
Thank you.