Allen-Bradley ControlNet PLC-5 User Manual page 64

C-6 Data Table Crossloading
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All elements of all data table files are crossloaded in the Qualification
data table crossload with the exception of the following files. These
files cannot be crossloaded because they contain processor-specific
configuration and status information.
• System Status File (S2)
• ControlNet Backup Integer File
• ControlNet Configuration File
• ControlNet I/O Status File
• ControlNet Diagnostic File
• ControlNet Data Output File (DOF)
• ControlNet Data Input File (DIF)
Although the System Status File is not crossloaded, the real time
clock (6 words) in the System Status File is crossloaded from the
primary processor to the partner processor.
Qualification State Data Table Crossload
Even though a Qualification data table crossload has occurred during
qualification, some of the crossloaded data may have become stale.
This is because the Qualification data table crossload occurs while the
processor is in Program mode. For example, if the Qualification data
table crossload takes 10 seconds, the data in the original data table file
that was transferred is 10 seconds old. In order to bring certain state
information in the data table up to date, a Qualification State data
table crossload is performed.
The Qualification State data table crossload occurs when the
qualifying processor has transitioned into Run mode, but before the
qualifying processor has become qualified.
The Qualification State data table crossload is almost identical to the
On-Demand data table crossload discussed previously. The only
differences are:
• the Qualification State data table crossload occurs automatically
during qualification whereas you must trigger the On-Demand
data table crossload
• the Qualification State data table crossload always performs all
four crossload operations (Timer Accumulators, Counter
Accumulators, PD files, and User Selectable files), whereas the
On-Demand data table crossload allows you to select which
combination of the four operations get performed
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