| 摘要 |
PURPOSE:To maintain and improve the accuracy of a response time by executing a user instruction group existing in a specified address space only when the executing condition of a specific instruction is formed at the reception of a time interruption. CONSTITUTION:A programmable controller is constituted of a central processor (CPU) 11 formed as a main device, a ROM 2, a user program memory 3, a RAM 5 having flag registers FA, FB, an I/O memory 6, an interruption accepting circuit 8, etc. Consequently, instructions A, B for specifying optional address spaces in the user program memory 3 as rapid processing areas are included in a user program, and during the period of no time interruption, control operation is executed in accordance with the user program. When an interruption is accepted, the user instruction group existing in the address spaces specified by the instructions A, B only when the executing condition of the instruction A has been formed. |
