KROHNE UFC 400 User Manual (English)

Questions and Answers:

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lukebarnesAug 3, 2025
How to troubleshoot no response to Modbus requests on KROHNE Media Converter?
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  Sarah JohnsonAug 3, 2025
  If the KROHNE Media Converter isn't responding to Modbus requests, first, verify the correct voltage input on the V+ and V- terminals of the signal converter. Second, check the continuity between the A and B input terminals and their counterparts at the master device, ensuring they're correctly connected and that a proper 'Common' connection exists between the master device and the signal converter. Finally, confirm that the requested Address ID is correct (default is 1) and that the transmission rate (default = 19200 Baud) and format (default = 8 data bits, even parity, and 1 stop bit) are also correct.
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Ann TorresAug 9, 2025
What to do if KROHNE UFC 400 has communication errors?
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  Alyssa GilbertAug 10, 2025
  If you're experiencing communication errors with the KROHNE Media Converter, consider the following: * Ensure high-quality connections at the terminals of both the signal converter and the master device, checking for fraying or corrosion. * Check the cable lengths or cable capacitance. * Look for nearby sources of electromagnetic interference along the cable route. * Try using a dedicated RS485 interface PC card instead of standard protocol converters.
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Susan RiversAug 22, 2025
What causes 'Illegal Data Value' exception in KROHNE UFC 400?
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  Jennifer ClarkAug 22, 2025
  If the KROHNE Media Converter responds with an 'Illegal Data Value' exception, it means that the value being written to a holding register is beyond the permitted limits for that register. You should refer to the limits for each holding register indicated in the 'Parameters' section.
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Scott SmithAug 28, 2025
How to fix 'Illegal Function' exception on KROHNE Media Converter?
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  Nathaniel MonroeAug 28, 2025
  To resolve the 'Illegal Function' exception with your KROHNE Media Converter, check the list of valid Modbus functions.