Omron C200H Operation Manual page 236

Cycle Time
6-1-2 CPU11-E Cycle Time
Sets error flags and turns
ON or flashes indicator
ALARM/ERROR
(Flashing)
ERROR
(Solid ON)
224
Power application
Clears IR area and
resets all timers
Checks I/O Unit connections
Resets watchdog timer
Checks hardware and
Program Memory
NO
Check OK?
Resets watchdog timer and
program address counter
Executes program
ALARM
End of program?
SCAN(18)
executed?
Resets watchdog timer and waits
until the set cycle time has elapsed
Calculates cycle time
Resets watchdog timer
Refreshes input bits
and output signals
Services Host Link Units
Services Peripheral devices
Services SYSMAC LINK and
SYSMAC NET Link Units
YES
NO
YES
NO
YES
Section 6-1
Initialization
on power-up
Overseeing
processes
Program
execution
PC
cycle
time
Cycle time
calculation
I/O
refreshing
Host Link Unit
servicing
Peripheral
device
servicing
SYSMAC LINK
and SYSMAC
NET Link Unit
servicing