HIGH-SPEED SAMPLING PROCESSING SYSTEM

PURPOSE:To execute prescribed samplings within target sampling periods when direct digital control operations cannot be executed within sampling periods because special processing are generated, by outputting operational results in the previous sampling period. CONSTITUTION:Target sampling time t1 is selected in such a way that a direct digital control DDC or a special processing can be executed within the sampling time t1. When an interruption 2 is generated and a special processing becomes necessary, an interruption existence deciding processing is executed and the presence or absence of the interruption is decided within time 9, and then a speci al processing is executed within time 11. The content of the preceding DDC processing is outputted as the content of the current processing immediately after the special processing is terminated without making any DDC processing irrespective of the length of the special processing. When an interruption processing which on special processing is generated, the processing proceeds from block A to block J through blocks G and I as usual, and after outputting the controlled output value of the proceeding processing as the operational result of the current processing at block K the processing is terminaled. Therefore, any special processing can be executed within one sampling period.