FAQ: What is a "DWG" (drawing)?
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1. DWG.A- Executed only once at power up
2. DWG.H- Executed once every High-Speed scan cycle (this cycle time is set by High-Speed scan time)
3. DWG.L- Executed once every Low-Speed scan cycle (this cycle time is set by Low-Speed scan time)
They are organized like a family of three generations. A parent drawing (i.e. 'H') is automatically executed by the CPU. Child generations (i.e. 'H01') are executed by being called by the parent drawing with a 'SEE' instruction. Grandchild generations (i.e. 'H01.01') are called by child drawings in the same way. Only a direct descendant of the same family can be called. A parent drawing can not call a grandchild drawing directly, and a drawing can not call drawings of another family (i.e. DWG.H01 can not call DWG.H02.01).
Each drawing family will be executed every scan cycle. If there are too many steps in the family of drawings to execute in the allotted time, an error will occur. Increasing the appropriate scan time will prevent this situation.
The attached file shows the structure for calling drawings
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