Rockwell Automation 1785-CHBM ControlNet PLC-5 Hot Backup System User Manual - Manual (Page 48)

Publication 1785-UM024B-EN-P - January 2003
3-22 Installing and Configuring Your ControlNet PLC-5 Backup System
Equivalent indicates that the two processors are identical, and
Different indicates that there were differences detected. Refer to
Appendix B for more information on equivalence checking.
Crossloading
You can perform data table crossloading on demand. While both PLC
processors are running, you can initiate a crossload from either the
primary or secondary processor. You can perform a crossload on the
following data file types:
• all timer accumulation values in the data table
• all counter accumulation values in the data table
• all PID files in the data table
• user-defined files, which allow you to select up to 2 separate
data file numbers and/or a range of files.
You can set up and select the files to be crossloaded from the
Crossload tab of the ControlNet Hot Backup screen.
To crossload timer, counter, or PID values, simply click on the
respective button. The crossload is performed as soon as you click on
the appropriate button.
To set up user-defined crossloading, you must designate the files you
wish to be crossloaded. If you are selecting individual files, enter the
first file you wish to crossload in the First Selected File box. If you
wish to also crossload a second file, enter it in the Second Selected
File box.
If you wish to crossload a range of files, enter the lowest file number
and the highest file number in the respective boxes.
Refer to Appendix C for more information on Data Table
Crossloading.