Chapter 3 Project
3-21
[Description of Dialog Box]
a. Task name: used to input a desired task name. Korean, English and figures can be used except for
special characters.
b. Priority: used to specify the priority of the tasks. The less the figure is, the higher the priority is.
c. Task number: used to manage the tasks in PLC. According to the execution condition, the number
specified in the right shall be used. Ex.) Fixed Cycle: 0 ~ 31
d. Execution condition: used to specify the execution condition under which the task will be executed.
Notes
- Execution condition may be different according to the PLC type.
- Initialization: It is the task to be executed when PLC mode is converted from Stop to Run. It will be
executed till the _INIT_DONE (F10250) Flag is ON. And while the initialization task is executed, the
programs (including the Scan Program) which belong to other task will not be executed.
- Fixed Cycle: The task will be executed at an interval of specified time. The time shall be inputted in ms unit.
- External contact point: The task will be executed if specified external contact point is ON. The relative
external device should be entered.
Example) %QX0.0.1
- Internal device: The task will be executed based on the status of internal device. The setup item will be
different according to the type of internal device.
e. Internal device execution condition: setting items are different according to the type of internal device.
f. Device: used to input the device name which will be used as the start condition of task program. Input BIT
or WORD device according to the condition to execute task program.
g. Word device start condition: The start condition shall be specified if WORD type of the internal device start
condition is selected.
h. Bit device start condition: The start condition shall be specified if BIT type of the internal device start
condition is selected.
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