How to configure to stop system off after 3 minutes?

[GT Software]

On custom nRF51422 hardware with S110, I eventually found that after 3 minutes the advertising timeout turns off the system. I reproduced it by using the nRF SDK v9 project ble_app_uart_s110_pca10028

These links mention the 3 minutes timeout

devzone.nordicsemi.com/.../

developer.nordicsemi.com/.../a00076.html

What is the correct way to stop a system off?

Is it by configuration of pca100028.h or ble_advertising.h or perhaps by removing the event handler code?

[syntroniks]

I am able to use a timeout of 0 (infinite) on SDK9 with SD8. I used to restart adv on idle event until I was able to set the timeout to 0.