Siemens Simatic box pc 627b - Page 159

Detailed descriptions
16.4 BIOS Setup
SIMATIC Box PC 627
Operating Instructions, Release 05/2006, A5E00362052-03
16-41
"PCI Devices" field
If the PCI devices field is selected, the following submenu appears:
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Figure 16-13 PCI Devices submenu, slot #1
[Enabled] The ROM option 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 PCI slave.
[Default] The number of active PCI clock cycles of the
master modules is determined by this module
[0020H to
00E0H]
These settings are used to 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.