| 摘要 |
PURPOSE:To realize a substantially high control response speed even when the scale of control is large by performing only necessary processing corresponding to a state change. CONSTITUTION:Sequence control is divided into proper units, and respective work contents are given individual work numbers and stored in a working memory 1. Then, the states of respective signal elements of the control are given individual state numbers, and the control is represented by a set of the state numbers. An execution condition memory 2 is stored with execution conditions represented by the set corresponding to the respective work numbers. Further, each state number has a token indicating whether the state is present or not. A work execution part 3 receives a work number from an execution condition monitoring part 4, reads the corresponding work contents out of the memory 1 and executes them, and transmits the result to the monitoring part 4 after the execution. The monitoring part 4 receives it to set a token appended to the received state number among the tokens in the memory 2 and also find all state numbers whose tokens are set in the memory 2 at the same time, and sends the corresponding work numbers to the execution part 3. |
