Siemens simatic ET 200SP User Manual page 61

Boot Device Priority > submenu "Boot Type Order"
Entry
Hard Disk Drive
USB
Others
All connected boot-capable components and their boot position are displayed in this menu.
The boot position of the components can be moved freely.
The component at the top (highest boot priority) is used for booting. If the component is not
available, the system boots from the next component in the list.
You change the boot sequence as follows:
● Select the boot components using the keys <↑>, <↓>
● Move to the required position using the keys <+>, <–>
Note
During the boot operation, you can start the Boot Manager with the <F12> key.
The Boot Manager displays all available boot components and boots from the device
selected by the user.
"Normal Boot Menu > Advance" setting
In the "Advance" setting, boot-capable components that are disconnected and reconnected
by the CPU 1515SP PC between the boot processes are set to the top position by the BIOS.
Boot Device Priority > submenu "Hard Disk Drive"
The size of the CFast card is displayed in this menu.
CPU 1515SP PC
Manual, 12/2014, A5E32701806-AA
Meaning
Setting the boot sequence of the group of drives
Setting the boot sequence of the group of USB drives
Setting the boot sequence of the group Others,, e.g. Remote Boot
Device
Functions
8.3 BIOS description
61