| 摘要 |
PURPOSE:To control a sequence at a high speed by dividing the operating state of a driven process into operating elements and executing only a necessary logical operation in accordance with the state of the divided operating elements. CONSTITUTION:A read-only-memory (ROM)4, a random access memory (RAM)5, etc. are connected to an arithmetic circuit 1 through a bus 10 to control a servo motor 8 and a contact circuit 9 through a servo I/O circuit 6 and a sequence I/O circuit 7 respectively. Since the logical operation of only a necessary part is executed during parallel processing flow, an execution table 2 and an execution end table 3 are formed, an logical operation part to be executed out of logical operations alpha-gamma or the like is discriminated and the discriminated part is registered in respective tables 2, 3. The logical operations including the positional command operation of a servo motor 8, e.g. starting of the servo motor 8, are executed in the order of registration. Consequently, sequence control can be attained at a high speed without operating all the logical operations. |
