Computing The Cycle Time; Cpu Unit Operation Flowchart - Omron SYSMAC CP Series Instruction & Reference Manual

4-2

Computing the Cycle Time

4-2-1

CPU Unit Operation Flowchart

The CPU Unit processes data in repeating cycles from the overseeing processing up to peripheral
servicing as shown in the following diagram.
Sets error flags
ERR/ALM
indicator ON or
flashing?
CP1E CPU Unit Instructions Reference Manual(W483)
Checks Unit connection status
Checks hardware and user
program memory
Error
Flashing (non-
fatal error)
User program executed
Cyclic task executed
Lit (fatal error)
Waits until the set cycle time
has elapsed (when the
minimum cycle time is valid)
Calculates cycle time
Peripheral servicing
4 Monitoring and Computing the Cycle Time
Power ON
Check OK?
Normal
NO
End of program?
YES
I/O refresh
4
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