AUTOMATIC EXECUTION-ORDER DECISION METHOD FOR FUNCTION BLOCKS IN A LOGIC DIAGRAM

摘要

The present invention can enhance the convenience of the author by allowing the execution order of each functional block made by the functional block diagram technique, an international standard language for writing control logic, to be accurately determined irrespective of the position and size on their graphic screen. A method for determining the execution order of an arbitrarily created functional block diagram. According to an aspect of the present invention, there is provided a method of determining an execution order of an arbitrary functional block diagram, the method comprising: (a) parsing a graphic screen on which an arbitrary functional block diagram is created to check input / output connection relations of respective functional blocks; (b) dividing the entire functional block into an unconstrained functional block group that can be executed immediately and another limited functional block group only prior to executing the entire functional block based on the connection relationship identified in step (a); (c) determining and storing an execution order of functional blocks belonging to the unrestricted functional block group according to a predetermined rule; (d) repeating step (b) or below for the functional blocks belonging to the restricted functional block group on the premise of executing the unrestricted functional blocks until the execution order of all functional blocks is determined.