| 摘要 |
PURPOSE:To eliminate variations caused by a scan time, by setting a value which has been counted by an input time counter in advance, to an execution output time counter. CONSTITUTION:When time between incoming of an input signal and its output from an operation part after executing the program concerned is referred to as t1, the execution output timing is delayed by a scanning time t-t1 behind an output time point of the operation part. According to this method, as for the execution output timing, it becomes the same execution output timing as the fact that an interruption signal has been inputted at the time shifted by 1 scan portion. That is to say, the shift of the input timing of an input signal from a sensor is counted by a time counter 11, and a value which has been counted in this way is set to an execution output time counter 12 in advance. In this state, if an input signal comes in from the sensor, an output signal is always outputted to an apparatus to be controlled 13 from a sequence control device 20 after the lapse of a constant time. |
