Chapter 5 Program Configuration and Operation Method
5 - 6
1) Scan Program
(1) Function
• This program performs the operation repeatedly from 0 step to last step in order prepared by the
program to process the signal that is repeatedly regularly every scan.
• In case that the execution condition of interrupt by task interrupt or interrupt module while executing
scan program is established, stop the current program in execution and perform the related
interrupt program.
2) Interrupt Program
(1) Function
• This program stops the operation of scan program and then processes the related function in prior
to process the internal/external signal occurred periodically/non-periodically.
(2) Type
• Task program is divided as below.
(a) Time-driven task program : available to use up to 32
(b) Internal device task program : available to use up to 32
- Time-driven task program
▶ Performs the program according to the fixed time internal.
- Internal device task program
▶ Performs the corresponding program when the start condition of internal device occurs.
▶ The start condition detection of device shall be performed after processing of scan program.
PPoin
1) For further information of interrupt program, please refer to 5.2.3 Interrupt.
Notes
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