| 摘要 |
<p>PURPOSE:To minimize the number of I/O of a PIO to be set into a process control computer by providing the auxiliary CPU to an auxiliary CP to each of those computers forming a group and at the same time connecting shift registers to those CPU. CONSTITUTION:The data outputted from a process control computer 2 via a PIO 2a is stored temporarily in a RAM 10 set within a sequencer 4a containing an auxiliary CPU. Then the data stored in the RAM 10 are transferred to shift registers 5a-5n set in the sequencers 4a-4n connected to said CPU respectively. Then the new data outputted from the computer 2 via the PIO 2a when the working process is over are transferred to those shift registers provided in the sequencers which control successively the following processes as soon as the working of each process is through. Then the difference is recognized between the data transferred and stored in two shift registers.</p> |
