Hi,
In what way are they incompatible? ?The modbus processor module creates the checksum for any modbus command and should work with 4-series just fine. ?You may need to swap the two checksum bytes though as the ¡°endianness¡± is wrong.
If you can expand on where you¡¯re hitting problems it¡¯ll be easier to respond more fully.
?
All the best,
Oliver
