Try to use Ethernet connection, not Bluetooth.
Put your CoDeSys program into "STOP" (can use gray switch on PFC200 front panel for this) before saving settings.
Ensure that you have fresh PFC200 Firmware (Firmware Revision:02.04.22(06) or al least (04)).
Why do you need EthernetSettings? Almost all configuration is done via WEB-based management pages in PFC200.