I'm trying to use a DF PROFI II CPCI card in my PXI to communicate with a Siemens S7-300 PLC. The data I am sending is a 32-bit value. Siemens claims that it will spread this value over 4 bytes automatically. My problem is I am only getting the first byte. The next 3 bytes are zero's, then I get the first byte of my next value.
Is there a setup procedure to allow this? Is my problem in the PLC?
Thanks for any help I can get.
Ralph
