Detailed descriptions
16.5 BIOS Setup
SIMATIC Rack PC 840 V2
Operating Instructions, Edition 05/2006, A5E00248055-04
16-35
"PCI Devices" field
If the PCI devices field is selected, the following submenu appears:
Figure 16-15 PCI Devices submenu, slot #1
[Enabled]
The Option ROM of the PCI module (if present) is
enabled
ROM scan option:
[Disabled]
The ROM option of a PCI module is disabled.
[Enabled]
This slot can be assigned master functions
Enable Master
[Disabled]
This slot can only operate as a PCI slave.
[Default]
The number of active PCI clock cycles of the
master modules is determined by this module
[0020H to 00E0H]
With these settings, you set the maximum number
of active PCI clock cycles to the selected value.
Latency Timer
You should only use a value different from the default if the module or its
application requires it.
