| 摘要 |
PURPOSE:To display the result of operation, by providing a memory part to store the maximum process time value for each instruction of a series of user instruction groups that form a user program and reading and integrating the maximum process time of each instruction. CONSTITUTION:A programmable logic controller includes a user program memory 1 that stores a control program, an RAM3 that stores temporarily the input/ output data of an input/output circuit 2, a CPU4 that performs a logic arithmetic process for the input/output data based on the control program, a timing means 8, a keyboard 9, a display part 10 and furthermore a memory part 16 that defines and stores the maximum process time of each instruction for a series of user instruction groups that form a user program. The CPU4 performs an operation in which the maximum process time of each instruction is read and integrated. Then a display is carried out at the display part 10 to confirm whether the result of the above-mentioned operation is reduced less than the shortest connecting time value in the input mode of the controller. |
