| 摘要 |
PURPOSE:To realize plural type of logical arithmetic controls as well as the control through the step advance when the conditions are satisfied, by adding a furnction that advances the process when a certain condition is satisfied to a sequence controller of the scanning system. CONSTITUTION:A sequence controller of the scanning system executes plural types of logical arithmetic in parallel by repeating the program scan. A step controller SPC which advances successively its state in a prescribed sequence except for a jump instruction is provided to the above-mentioned sequence controller. In case when the SPC is under a specific state, e.g. an SPC2 and a certain logical arithmetic are incorporated into the same equivalent relay circuit with the SPC is at an SPC1 which is immediately before a specific state pulse an AND satisfied to the logical arithmatic, the SPC is advanced from the SPC1 to the SPC2. At the same time, an internal flag IR34 is set at 1 when it is designated. Accordingly the control performed through a step advance when the condition are satisfied is linked while executing the mutual and independent random logical controls by the scanning system. Thus the sequence control is possible. |
