Cant address first byte

  • Hello im new to fanuc so i don know if im asking anything relevant. Anyway i have R-30iB controller and siemens plc 7200 they are comunicating through profinet . My problem is that i cant turn first 8 bites ON i have to start with 9 bit and value of 256 .Is that a problem or are the bites reserved ? :help:
    Thanks in advance.

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