FAQ: Can subroutines be called from "L" or "H" drawings?
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Subroutines, as called in the above question, are better described as sub-drawings. They exist in both H "High speed" and L "Low Speed" type. Each H or L drawing can have its own respective set of hierarchical levels (Parent, Child, Grandchild), there are three levels available. H = parent, H.01 = child, H.01.01 = grandchild.
The total number of drawings available depend on the controller type
MP920 - 64 A drawings, 200 H drawings, 500 L drawings, 64 I drawings
MP930 - 64 A drawings, 100 H drawings, 100 L drawings
MP940 - 4 A drawings, 16 H drawings, 32 L drawings, 8 I drawings
The primary reason for this is to keep the Ladder Code organized for easier monitoring and debugging. High speed is commonly used for code related to motion and fast I/O response. Low speed is commonly reserved for background operation.
An example of a "drawing tree," is attached.
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Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not supersede it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.
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Waukegan, IL 60085