WAGO I/O System 750 Manual page 128

128 Commissioning
Do not power cycle the controller after changing any parameters!
Some parameter changes require a controller restart for the changes to apply.
Saving changes takes time.
Do not power cycle the controller to perform a restart, i.e., changes may be lost
by shutting down the controller too soon.
Only restart the controller using the software reboot function. This ensures that
all memory operations are completed correctly and completely.
Manual
Version 1.7.0, valid from FW Version 04.01.10(23)
WAGO I/O System 750
750-8210/040-000 PFC200; G2; 4ETH; XTR