Allen-Bradley ControlNet PLC-5 User Manual page 61

• Timer Accumulators
When Timer Accumulators are crossloaded during the
On-Demand data table crossload, only the Accumulator
subelements of the Timer structures are crossloaded.
Crossloading only the Accumulator subelements of the Timer
structures allows the secondary processor to match the
Accumulator values in the primary processor without corrupting
the control bit subelements of the Timer structures in the
secondary processor. All files of Timer file types are crossloaded
(i.e., you cannot crossload a subset of Timer file types). Also, all
file elements of each Timer file are crossloaded (i.e., you cannot
crossload a subset of file elements for a particular file).
• Counter Accumulators
When Counter Accumulators are crossloaded during the
On-Demand data table crossload, only the Accumulator
subelements of the Counter structures are crossloaded.
Crossloading only the Accumulator subelements of the Counter
structures allows the secondary processor to match the
Accumulator values in the primary processor without corrupting
the control bit subelements of the Counter structures in the
secondary processor. All files of Counter file types are
crossloaded (i.e., you cannot crossload a subset of Counter file
types). Also, all file elements of each Counter file are
crossloaded (i.e., you cannot crossload a subset of file elements
for a particular file).
• PD Files
The entire PD file structure is crossloaded during the On-Demand
data table crossload from the primary processor to the
non-primary processor. All PD files are crossloaded, as well as
all elements in the PD files. You are not able to crossload a
subset of PD file types (i.e., if there are 20 PD data table files, all
20 PD data table files will be crossloaded).
• User-Selectable Files
You can select two individual files and a range of files (inclusive)
to be crossloaded from the primary processor to the non-primary
processor during the On-Demand data table crossload. All the
elements of these files are crossloaded. There are 4 words in the
ControlNet Hot Backup Integer file reserved for user-selectable
On-Demand data table crossloads. You must fill in the file
numbers into these 4 words for the appropriate files to be
transferred. You should fill in a zero when you do not wish to
perform a crossload.
- User Defined crossload File 1 (Word 55 of the CHBI file)
- User Defined crossload File 2 (Word 56 of the CHBI file)
- User Defined crossload Range Low File (Word 57 of the
CHBI file)
- User Defined crossload Range High File (Word 58 of the
CHBI file)
Data Table Crossloading
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