Mitsubishi 00JCPU User Manual page 488

(3) Scan time structure of the Redundant CPU
Backup mode/
standby system
STOP/PAUSE status
STOP/PAUSE processing
*1: When the CPU modules are switched from backup mode to separate mode, the CPU module in the standby system (the
RUN LED turns on) cannot execute any program.
*2: End of a program indicates the timing when the END, GOEND, FEND, or STOP instruction is executed.
10 - 4
Processing in the
RUN status
Program check
I/O refresh
Operation mode and
system identification
Backup mode/controlsystem
Separate mode/controlsystem
Separate mode/standby system*1
Execution of the DUTY instruction in END
processing (no execution when the DUTY
instruction is not used)
Program execution
End the program? *2
YES
Refresh via MELSECNET/H
Refresh via CC-Link IE Controller Network
Refresh via CC-Link
Refresh by the intelligent function module
parameters set in GX Configurator
Calendar update, program memory
check processing, error clear
Service processing
Processing during the constant scan
waiting time (no processing when the
constant scan time is not set)
WDT reset, scan time calculation
Operating status check
RUN status
Figure 10.3 Scan time structure of the Redundant CPU
I/O refresh time
Section 10.1.2(1)
(
Tracking time
Section 10.1.2(2)
(
Instruction execution time in END processing
Section 10.1.2(3) Section 10.1.2(3)
(
Instruction execution time
Section 10.1.2(4)
(
NO
Module refresh time
Section 10.1.2(5)
(
Function execution time in END processing
Section 10.1.2(6)
(
Service processing time
Section 10.1.2(7)
(
Common processing time
Section 10.1.2(9)
(
)
)
)
)
Scan
time
Common
END
processing
time
)
)
)
)