5. Specific configuration issues for bits within Merker words or bytes.
Bits within byte and word addresses are specified differently in S5 and the WinCC Flexible
In WinCC Flexible only complete words can be addressed. These should always start at even
numbers. Uneven numbers can be specified, but should be avoided.
In S5, a word contains two bytes.
Additionally, the byte order in the S5 and WinCC Flexible is reversed compared to each other.
Thus, the bit numbering follows these rules (example of Merker addresses):
Address in S5: MW n = MB n + MBn+1
Address in WinCC Flexible: FW n
Even bit address in S5: Mx.y
Bit address in WinCC Flexible: FWx.y+8
Un-even bit address in S5: Mx.y
Bit address in WinCC Flexible: FWx-1.y
Bit address in S5: M4.2
Bit address in WinCC Flexible: FW4.10
Bit address in S5: M5.6
Bit address in WinCC Flexible: FW4.6
Notice in the example how the addresses are within one word in both platforms, but the bit
numbering is swapped.