I have been struggling with communication with a grundfos MGE motor. I have copies of the GENIbus protocol and example telegrams with CRCs already calculated i transmit the telegram but dont get the expected reply. Also i have tried to calulate the CRC for my self but it turns out totally different to the one in the examples, this also didnt get the expected reply. Also within the telegram is a sourse address for the GENIbus master. Does anyone know if this address matters. do i have to know the address for the master which i assume is the COM port on my PC that the RS484 converter is connected?

LabVIEW

Hi bwc1,

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