Siemens Simatic S7-400 - Manual (Page 464)

CPUs for M7-400
11-36
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
11.4.12 Setup Page “Boot Options”
Opening the Setup Page
If you have selected “Boot Options” and activated the OPEN button in the Setup
menu (Figure 11-9 on page 11-23), this setup page appears on the screen
(Figure 11-18).
Figure 11-18 “Boot Options” Setup Page
What is the Purpose of the Setup Page?
On this page, you set the boot drive and the method for the main memory test.
Boot Sequence
By activating the relevant option button, you select here the drive from which the
CPU is to boot at power up.
• Drive A represents the floppy disk drive or memory card, depending on which of
them has been entered as Drive A in the “Floppy/Card” setup page. If there is
no medium with boot capability in the floppy disk drive, the system will next try
to boot from the memory card (“Floppy/Card” setup page –> Drive B).
• Drive C represents the hard disk drive.
It is possible to designate a primary and secondary drive, that is, if there is no boot
program in the primary drive, the system boots automatically from the secondary
drive if there is a boot program there.
If neither Drive A nor Drive C contain a boot program, a message on the screen
prompts you to insert a medium with boot capability and to confirm this by
pressing RETURN .