leave an appropriate margin
Taking into account the expansion of production scale,the improvement of production technology,the increase of control tasks,and the need for convenient maintenance,it is necessary to make full use of the easy expansion of PLC./O points,etc.),leave an appropriate margin.
留有适当的裕量
考虑到生产规模的扩大,生产工艺的改进,控制任务的增加,以及维护方便的需要,要充分利用PLC易于扩充的特点,在选择PLC的容量(包括存储器的容量、机架插槽数、I/O点的数量等)时,应留有适当的裕量。
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