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2.3.4  

Fixed scan execution type program

Fixed scan execution type program is a program executed at specified time intervals.
This type of programs, unlike interrupt programs, can be interrupted in units of files without interrupt 
pointers or the IRET instruction.
For the restrictions on programming, refer to

Section 2.2.3(2)(b).

(The restrictions on programming are the same as those for interrupt programs.)

To execute a fixed scan execution type program, execute the EI instruction in the initial execution type program 
or scan execution type program to enable interrupts.

Fixed scan interval

END processing

Scan execution 
type program

Fixed scan execution 
type program

Condition 
established

Condition 
established