258 PROFIsafe
19. If necessary, you can give proper symbol names to the cyclic data:
• Right-click the I/O object (PPO Type 4) in Slot 1 and select Edit Symbols…
• Add names for the symbols.
• Repeat the same for the PROFIsafe object (PROFIsafe ABB_PS1) in Slot 2.
Note: In PROFINET communication, the bits of each octet are sent the most
significant bit first. Therefore, the bits of every octet in the PROFINET message
are in reversed order compared to the bits shown in the figure. For example, the
first bit that is sent in the PROFINET message is the 7th bit of the first octet (I 0.7).
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