Rockwell Automation 1785-CHBM ControlNet PLC-5 Hot Backup System User Manual - Manual (Page 102)

Publication 1785-UM024B-EN-P - January 2003
C-4 Data Table Crossloading
• 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)
The two individual files as well as the range of files you select
are crossloaded, regardless of file type. There are some notable
exceptions; the following files are not be crossloaded even
when you select them:
– Output Image File (File 0)
– Input Image File (File 1)
– System Status File (S2)
– ControlNet Data Output File (DOF)
– ControlNet Data Input File (DIF)
– ControlNet Backup Integer File
– ControlNet Configuration File
IMPORTANT
In a ControlNet Hot Backup system, do not attempt
to crossload MG, BT or CT file types. Additionally,
make sure these files are not in the range of
user-defined crossload files. This could lock-up
messages on the secondary PLC-5.