Rockwell Automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CONC(OR.DU1 - Manual (Page 54)

Using the 1775ĆMX
Memory Communication Module
Chapter 4
4-7
Inactive Command
The INACTIVE command lets you discontinue continuous data table and
file transfers. As long as the selection INACTIVE is active, the memory
communication module inhibits data and file transfers between the primary
processor and the backup processor.
If a data or file transfer was in progress when you selected the INACTIVE
function, it will become effective on completion of the transfer in progress.
Then, all subsequent data and file transfers will be inhibited.
File Transfer Command
The FILE TRANSFER command lets you transfer a group of selected files
from the primary to the backup processor. You can specify from 1 to 16
files by using the file selection function.
When the selection FILE TRANSFER is active, the memory
communication module transfers the selected files from the primary to the
backup processor continuously. If the list of files contains a file that does
not exist in the primary processor, the memory communication module:
displays the message FILE LIST ERROR on the PLC-3 front panel or
on the programming terminal
proceeds to the next legitimate file in the list.
For the file transfer function to work properly, the primary processor must
be in run mode or test mode. File transfer will stop if you switch the
primary processor to program mode. When you switch the primary
processor out of program mode, file transfer will become active again as
long as the selection FILE TRANSFER is still active in LIST.