Siemens SIMATIC PANEL PC 877 - Manual (Page 235)

Detailed descriptions
17.6 BIOS setup
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
17-43
Array Meaning
Type The parameters which you can select here are usually saved on the respective IDE
drive. The 'Auto' setting in the 'Type' field means that these values are automatically
read from the drive and written to memory (Auto detect).
If Type is selected for a drive that cannot be detected, a time-out is triggered within
approximately 1 minute and the entries remain unchanged. You should always check
that the interfaces for which you select 'Auto' are in fact connected to drives.
Select “User” if you want to define the hard disk drive. You also need to configure the
other options, for example, Cylinder, Heads, Sectors/Track, or other properties in
accordance with the hard disk drive.
Select "None" if you have not connected a disk drive. This setting reduces the
system waiting time.
The number of sectors which are transmitted per interrupt are transferred in the
option “Multi-Sector Transfers.” The value depends on the drive and should be set
only to "Auto" in the "Type" field.
Multi Sector-
Transfer
Disabled
2, 4, 8, 16 sectors
LBA Mode
Control
“Enabled” in the option “LBA Mode Control” (enabled, disabled) means that hard disk
capacities greater than 528 MB are supported. The value depends on the drive and
should be set only to "Auto" in the "Type" field.
The type of access to the drive is defined in the 32-bit I/O field
Disabled
16-bit access
32-bit I/O
Enabled 32-bit accesses (default)
Transfer
Mode or Ultra
DMA Mode
The settings in these fields define the interface data transfer rate. The value depends
on the drive and should be set only to "Auto" in the "Type" field.
You leave the submenu using the ESC key.