With the address switches only the last byte of the IP address can be changed.
The IP address can only be set via the address switches in case of factory default or in case of the last byte of the IP address is set to zero.
⮫ “Configuration of the IP settings with the IP configuration tool”
The not allowed IP addresses are mapped as followed:
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Address switch position 255 is mapped to fixed IP 192.168.0.254 independent of other stored settings (by IP Configuration Tool).
This is a backup so the module can always get a valid IP address and can be configured by the IP Configuration Tool.
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Address switch position 0 is mapped to last byte equal 1 and DHCP enabled.