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Modbus CRC's - Printable Version

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Modbus CRC's - equalizer - 24.05.2018

Hi.

Im trying to interface to some Modbus devices that have internal parameters that are only accessible with a non-standard Modbus telegram. (Function codes 101 and 102)....

It looks pretty easy to manually create these nonstandard Modbus commands and drop them into the RS485 port but how are the CRC codes calculated?  That bit has got me at the moment.  Anyone with any pointers?


RE: Modbus CRC's - admin - 24.05.2018

https://forum.logicmachine.net/showthread.php?tid=808


RE: Modbus CRC's - equalizer - 24.05.2018

Thank you :-)
I now realize my search for Modbus RTU was not the best search phase...