| 摘要 |
To utilize a general-purpose personal computer 6 for debugging data easily in a programmable display device 10 wherein sets of processing instruction words are used on-screen for data processing, means of generalized construction is used for data communications between the computer 6 and the display device 10, and device names to be referred to in the reference information included in the instruction words are transferred, as converted to universal codes, between the computer 6 and the display device 10. The information to be displayed in serial frames 52 as branched for data processing is grouped into layers according to predetermined criteria so as to enable the operator to readily recognize the position of the current frame of information. When the movement of the information is selected, the information is moved on-screen from one layer to another layer.
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