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Modbus error CRC

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Modbus error CRC
CristianAgata Offline
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#1
19.02.2022, 14:30 (This post was last modified: 19.02.2022, 14:30 by CristianAgata.)
Hi everybody,
I've this error (see attached file) on a modbus system.
Any suggest?

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admin Offline
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#2
21.02.2022, 07:10
This usually means there's a problem on the physical bus level.
Make sure that parity and stop bits settings are correct. Check if GND is connected between LM and the Modbus device. A termination resistor might be needed as well. Also check AC polarity on both LM and the Modbus device. There was a report where one of the power supplies has AC polarity connected in reverse and this caused communication issues.
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