Mitsubishi 00JCPU User Manual page 438

(3) Processing of file register's block numbers
(a) When switching from the scan execution type/low-speed execution type program to
the interrupt/fixed scan execution type program
The CPU module saves the file register block numbers in the scan execution type/low-speed execution type
program, and passes them to the interrupt/fixed scan execution type program.
(b) When switching from the interrupt/fixed scan execution type program to the scan
execution type/low-speed execution type program
The CPU module restores the saved block numbers of the file register.
Execution program
Block No. of file
register
Save area
9 - 63
Scan/low-speed
Switching
execution type
program
Passed
Block 1
Saved
Block 0 Block 1
Figure 9.69 Saving and restoring file register's block numbers
Interrupt/fixed
Restored
scan execution
type program
[RSET K0]
Block 1 0
Block 1 Block 1
Scan/low-speed
execution type
program
Block 1
Restored
Block 1